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SNCA
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
Aliases SNCA, NACP, PARK1, PARK4, PD1, synuclein alpha
External IDs OMIM: 163890; MGI: 1277151; HomoloGene: 293; GeneCards: SNCA; OMA: SNCA - orthologs
Orthologs
SpeciesHumanMouse
Entrez

6622

20617

Ensembl

ENSG00000145335

ENSMUSG00000025889

UniProt

P37840

O55042

RefSeq (mRNA)

NM_001042451
NM_009221

RefSeq (protein)

NP_001035916
NP_033247

Location (UCSC) Chr 4: 89.7 – 89.84 Mb Chr 6: 60.71 – 60.81 Mb
PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

Alpha-synuclein (aSyn) is a protein that, in humans, is encoded by the SNCA gene. [5] Alpha-synuclein is a neuronal protein that regulates synaptic vesicle trafficking and subsequent neurotransmitter release. [6] [7]

It is abundant in the brain, while smaller amounts are found in the heart, muscle and other tissues. In the brain, alpha-synuclein is found mainly in the axon terminals of presynaptic neurons. [5] Within these terminals, alpha-synuclein interacts with phospholipids [8] and proteins. [5] [9] [10] Presynaptic terminals release chemical messengers, called neurotransmitters, from compartments known as synaptic vesicles. The release of neurotransmitters relays signals between neurons and is critical for normal brain function. [5]

In Parkinson's disease and other synucleinopathies, insoluble forms of alpha-synuclein accumulate as inclusions in Lewy bodies. [11]

Familial Parkinson's disease is associated with mutations in the -synuclein (SNCA) gene. In the process of seeded nucleation, alpha-synuclein acquires a cross-sheet structure similar to other amyloids. [12]

The human alpha-synuclein protein is made of 140 amino acids. [13] [14] [15] An alpha-synuclein fragment, known as the non- amyloid beta (non-Abeta) component (NAC) of Alzheimer's disease amyloid, originally found in an amyloid-enriched fraction, was shown to be a fragment of its precursor protein, NACP. [13] It was later determined that NACP is the human homologue of synuclein in electric rays, genus Torpedo. Therefore, NACP is now referred to as human alpha-synuclein. [16]

Tissue expression

Alpha-synuclein is a synuclein protein primarily found in neural tissue, making up as much as one percent of all proteins in the cytosol of brain cells. [17] It is expressed highly in neurons within the frontal cortex, hippocampus, striatum, and olfactory bulb, [17] but can also be found in the non-neuronal glial cells. [18] In melanocytes, SNCA protein expression may be regulated by microphthalmia-associated transcription factor (MITF). [19]

It has been established that alpha-synuclein is extensively localized in the nucleus of mammalian brain neurons, suggesting a role of alpha-synuclein in the nucleus. [20] Synuclein is however found predominantly in the presynaptic termini, in both free or membrane-bound forms, [21] with roughly 15% of synuclein being membrane-bound at any moment in neurons. [22]

It has also been shown that alpha-synuclein is localized in neuronal mitochondria. [23] [24] Alpha-synuclein is highly expressed in the mitochondria in olfactory bulb, hippocampus, striatum and thalamus, where the cytosolic alpha-synuclein is also rich. However, the cerebral cortex and cerebellum are two exceptions, which contain rich cytosolic alpha-synuclein but very low levels of mitochondrial alpha-synuclein. It has been shown that alpha-synuclein is localized in the inner membrane of mitochondria, and that the inhibitory effect of alpha-synuclein on complex I activity of the mitochondrial respiratory chain is dose-dependent. Thus, it is suggested that alpha-synuclein in mitochondria is differentially expressed in different brain regions and the background levels of mitochondrial alpha-synuclein may be a potential factor affecting mitochondrial function and predisposing some neurons to degeneration. [24]

At least three isoforms of synuclein are produced through alternative splicing. [25] The majority form of the protein, and the one most investigated, is the full-length protein of 140 amino acids. Other isoforms are alpha-synuclein-126, which lacks residues 41-54 due to loss of exon 3; and alpha-synuclein-112, [26] which lacks residues 103-130 due to loss of exon 5. [25]

In the enteric nervous system (ENS)

First characterisations of aSyn aggregates in the ENS of PD patients has been performed on autopsied specimens in the late 1980s. [27] It is yet unknown if the microbiome changes associated with PD are consequential to the illness process or main pathophysiology, or both. [28]

Individuals diagnosed with various synucleinopathies often display constipation and other GI dysfunctions years prior to the onset of movement dysfunction. [29]

Alpha synuclein potentially connects the gut-brain axis in Parkinson's disease patients. Common inherited Parkinson disease is associated with mutations in the alpha-synuclein (SNCA) gene. In the process of seeded nucleation, alpha-synuclein acquires a cross-sheet structure similar to other amyloids. [27]

The Enterobacteriaceae, which are quite common in the human gut, can create curli, which are functional amyloid proteins. The unfolded amyloid CsgA, which is secreted by bacteria and later aggregates extracellularly to create biofilms, mediates adherence to epithelial cells, and aids in bacteriophage defense, forms the curli fibers. Oral injection of curli-producing bacteria can also boost formation and aggregation of the amyloid protein Syn in old rats and nematodes. Host inflammation responses in the intestinal tract and periphery are modulated by curli exposure. Studies in biochemistry show that endogenous, bacterial chaperones of curli are capable of briefly interacting with Syn and controlling its aggregation. [29]

The clinical and pathological findings support the hypothesis that aSyn disease in PD occurs via a gut-brain pathway. For early diagnosis and early management in the phase of creation and propagation of aSyn, it is therefore of utmost importance to identify pathogenic aSyn in the digestive system, for example, by gastrointestinal tract (GIT) biopsies. [27]

According to a growing body of research, intestinal dysbiosis may be a major factor in the development of Parkinson's disease by encouraging intestinal permeability, gastrointestinal inflammation, and the aggregation and spread of asyn. [27]

Not just the CNS but other peripheral tissues, such as the GIT, have physiological aSyn expression as well as its phosphorylated variants. [30] As suggested by Borghammer and Van Den Berge (2019), one approach is to recognise the possibility of PD subtypes with various aSyn propagation methods, including either a peripheral nervous system (PNS)-first or a CNS-first route. [31]

While the GI tract has been linked to other neurological disorders such autism spectrum disorder, depression, anxiety, and Alzheimer's disease, protein aggregation and/or inflammation in the gut represent a new topic of investigation in synucleinopathies. [29]

Structure

Alpha-synuclein in solution is considered to be an intrinsically disordered protein, i.e. it lacks a single stable 3D structure. [32] [33] As of 2014, an increasing number of reports suggest, however, the presence of partial structures or mostly structured oligomeric states in the solution structure of alpha-synuclein even in the absence of lipids. This trend is also supported by a large number of single molecule ( optical tweezers) measurements on single copies of monomeric alpha-synuclein as well as covalently enforced dimers or tetramers of alpha-synuclein. [34]

Alpha-synuclein is specifically upregulated in a discrete population of presynaptic terminals of the brain during a period of acquisition-related synaptic rearrangement. [35] It has been shown that alpha-synuclein significantly interacts with tubulin, [36] and that alpha-synuclein may have activity as a potential microtubule-associated protein, like tau. [37] Evidence suggests that alpha-synuclein functions as a molecular chaperone in the formation of SNARE complexes. [38] [39] In particular, it simultaneously binds to phospholipids of the plasma membrane via its N-terminus domain and to synaptobrevin-2 via its C-terminus domain, with increased importance during synaptic activity. [40] Indeed, there is growing evidence that alpha-synuclein is involved in the functioning of the neuronal Golgi apparatus and vesicle trafficking. [41]

Apparently, alpha-synuclein is essential for normal development of the cognitive functions. Knock-out mice with the targeted inactivation of the expression of alpha-synuclein show impaired spatial learning and working memory. [42]

Interaction with lipid membranes

Experimental evidence has been collected on the interaction of alpha-synuclein with membrane and its involvement with membrane composition and turnover. Yeast genome screening has found that several genes that deal with lipid metabolism and mitochondrial fusion play a role in alpha-synuclein toxicity. [43] [44] Conversely, alpha-synuclein expression levels can affect the viscosity and the relative amount of fatty acids in the lipid bilayer. [45]

Alpha-synuclein is known to directly bind to lipid membranes, associating with the negatively charged surfaces of phospholipids. [45] Alpha-synuclein forms an extended helical structure on small unilamellar vesicles. [46] A preferential binding to small vesicles has been found. [47] The binding of alpha-synuclein to lipid membranes has complex effects on the latter, altering the bilayer structure and leading to the formation of small vesicles. [48] Alpha-synuclein has been shown to bend membranes of negatively charged phospholipid vesicles and form tubules from large lipid vesicles. [49] Using cryo-EM it was shown that these are micellar tubes of ~5-6 nm diameter. [50] Alpha-synuclein has also been shown to form lipid disc-like particles similar to apolipoproteins. [51] EPR studies have shown that the structure of alpha synuclein is dependent on the binding surface. [52] The protein adopts a broken-helical conformation on lipoprotein particles while it forms an extended helical structure on lipid vesicles and membrane tubes. [52] Studies have also suggested a possible antioxidant activity of alpha-synuclein in the membrane. [53]

Photomicrographs of regions of substantia nigra in a patient showing Lewy bodies and Lewy neurites in various magnifications

Membrane interaction of alpha-synuclein modulates or affects its rate of aggregation. [54] The membrane-mediated modulation of aggregation is very similar to that observed for other amyloid proteins such as IAPP and abeta. [54] Aggregated states of alpha-synuclein permeate the membrane of lipid vesicles. [55] They are formed upon interaction with peroxidation-prone polyunsaturated fatty acids (PUFA) but not with monounsaturated fatty acids [56] and the binding of lipid autoxidation-promoting transition metals such as iron or copper provokes oligomerization of alpha-synuclein. [57] The aggregated alpha-synuclein has a specific activity for peroxidized lipids and induces lipid autoxidation in PUFA-rich membranes of both neurons and astrocytes, decreasing resistance to apoptosis. [58] Lipid autoxidation is inhibited if the cells are pre-incubated with isotope-reinforced PUFAs (D-PUFA). [59]

Function

Although the function of alpha-synuclein is not well understood, studies suggest that it plays a role in restricting the mobility of synaptic vesicles, consequently attenuating synaptic vesicle recycling and neurotransmitter release. [60] [61] [62] [63] [64] [65] [9] An alternate view is that alpha-synuclein binds to VAMP2 (a synaptobrevin) and stabilizes SNARE complexes; [40] [66] [67] [68] [69] though recent studies indicate that alpha-synuclein–VAMP2 binding is critical for alpha-synuclein-mediated attenuation of synaptic vesicle recycling, connecting the two seemingly divergent views. [9] It may also help regulate the release of dopamine, a type of neurotransmitter that is critical for controlling the start and stop of voluntary and involuntary movements. [5]

Alpha-synuclein modulates DNA repair processes, including repair of double-strand breaks (DSBs). [70] DNA damage response markers co-localize with alpha-synuclein to form discrete foci in human cells and mouse brain. Depletion of alpha-synuclein in human cells causes increased introduction of DNA DSBs after exposure to bleomycin and reduced ability to repair these DSBs. In addition, alpha-synuclein knockout mice display a higher level of DSBs, and this problem can be alleviated by transgenic reintroduction of human alpha-synuclein. Alpha-synuclein promotes the DSB repair pathway referred to as non-homologous end joining. [70] The DNA repair function of alpha-synuclein appears to be compromised in Lewy body inclusion bearing neurons, and this may trigger cell death.

Proneurogenic function of alpha-synuclein

In some neurodegenerative diseases, alpha-synuclein produces insoluble inclusion bodies. These diseases, known as synucleinopathies, are connected with either higher levels of normal alpha-synuclein or its mutant variants. [71] The normal physiological role of Snca, however, has not yet been thoroughly explained. In fact, physiological Snca has been demonstrated to have a neuroprotective impact by inhibiting apoptosis induced by several types of apoptotic stimuli, or by regulating the expression of proteins involved in apoptotic pathways. Recently it has been demonstrated that up-regulation of alpha-synuclein in the dentate gyrus (a neurogenic niche where new neurons are generated throughout life) activates stem cells, in a model of premature neural aging. This model shows reduced expression of alpha-synuclein and reduced proliferation of stem cells, as is physiologically observed during aging. Exogenous alpha-synuclein in the dentate gyrus is able to rescue this defect. Moreover, alpha-synuclein also boosts the proliferation of dentate gyrus progenitor neural cells in wild-type young mice. Thus, alpha-synuclein represents an effector for neural stem and progenitor cell activation. [72] Similarly, alpha-synuclein has been found to be required to maintain stem cells of the SVZ (subventricular zone, i.e., another neurogenic niche) in a cycling state. [73]

Sequence

Alpha-synuclein primary structure is usually divided in three distinct domains:

  • Residues 1-60: An amphipathic N-terminal region dominated by four 11-residue repeats including the consensus sequence KTKEGV. This sequence has a structural alpha helix propensity similar to apolipoproteins-binding domains. [74] It is a highly conserved terminal that interacts with acidic lipid membranes, and all the discovered point mutations of the SNCA gene are located within this terminal. [75]
  • Residues 61-95: A central hydrophobic region which includes the non-amyloid-β component (NAC) region, involved in protein aggregation. [13] This domain is unique to alpha-synuclein among the synuclein family. [76]
  • Residues 96-140: a highly acidic and proline-rich region which has no distinct structural propensity. This domain plays an important role in the function, solubility and interaction of alpha-synuclein with other proteins. [77] [40]

Autoproteolytic activity

The use of high-resolution ion-mobility mass spectrometry (IMS-MS) on HPLC-purified alpha-synuclein in vitro has shown alpha-synuclein to be autoproteolytic (self- proteolytic), generating a variety of small molecular weight fragments upon incubation. [78] The 14.46  kDa protein was found to generate numerous smaller fragments, including 12.16 kDa ( amino acids 14–133) and 10.44 kDa (40-140) fragments formed through C- and N-terminal truncation and a 7.27 kDa C-terminal fragment (72-140). The 7.27 kDa fragment, which contains the majority of the NAC region, aggregated considerably faster than full-length alpha-synuclein. It is possible that these autoproteolytic products play a role as intermediates or cofactors in the aggregation of alpha-synuclein in vivo.

Clinical significance

Positive α-Synuclein staining of a Lewy body from a patient who had Parkinson's disease.

Alpha synuclein, having no single, well-defined tertiary structure, is an intrinsically disordered protein, [79] [80] with a pI value of 4.7, [81] which, under certain pathological conditions, can misfold in a way that exposes its core hydrophobic residues to the intracellular milieu, thus providing the opportunity for hydrophobic interactions to occur with a similar, equally exposed protein. [80] This could lead to self assembly and subsequent aggregation into large, insoluble fibrils known as amyloids. [80] The conversion of soluble alpha synuclein into highly ordered, cross-β sheet, fibrillar structures does not, as previously thought, follow a two-step mechanism, rather, occurs through a series of transient, soluble oligomeric intermediates. [82] [83] In 2011, two groups published their findings that unmutated α-synuclein forms a stably folded tetramer that resists aggregation, asserting that this folded tetramer represented the relevant in vivo structure in cells, [84] [85] thereby relieving alpha synuclein of its disordered status. Proponents of the tetramer hypothesis argued that in vivo cross-linking in bacteria, primary neurons and human erythroleukemia cells confirmed the presence of labile, tetrameric species. [86] [87] [88] However, despite numerous in-cell NMR reports demonstrating that alpha synuclein is indeed monomeric and disordered in intact E. coli cells, [89] [90] [91] [92] [93] [94] [95] [96] it is still a matter of debate in the field despite an ever growing mountain of conflicting reports. [93] [97] [98] Nevertheless, alpha-synuclein aggregates to form insoluble fibrils in pathological conditions characterized by Lewy bodies, such as Parkinson's disease, dementia with Lewy bodies and multiple system atrophy. [99] [100] These disorders are known as synucleinopathies. In vitro models of synucleinopathies revealed that aggregation of alpha-synuclein may lead to various cellular disorders including microtubule impairment, synaptic and mitochondrial dysfunctions, oxidative stress as well as dysregulation of Calcium signaling, proteasomal and lysosomal pathway. [101] Alpha-synuclein is the primary structural component of Lewy body fibrils. Occasionally, Lewy bodies contain tau protein; [102] however, alpha-synuclein and tau constitute two distinctive subsets of filaments in the same inclusion bodies. [103] Alpha-synuclein pathology is also found in both sporadic and familial cases with Alzheimer's disease. [104]

The aggregation mechanism of alpha-synuclein is uncertain. There is evidence of a structured intermediate rich in beta structure that can be the precursor of aggregation and, ultimately, Lewy bodies. [105] A single molecule study in 2008 suggests alpha-synuclein exists as a mix of unstructured, alpha-helix, and beta-sheet-rich conformers in equilibrium. Mutations or buffer conditions known to improve aggregation strongly increase the population of the beta conformer, thus suggesting this could be a conformation related to pathogenic aggregation. [106] One theory is that the majority of alpha-synuclein aggregates are located in the presynapse as smaller deposits which causes synaptic dysfunction. [107] Among the strategies for treating synucleinopathies are compounds that inhibit aggregation of alpha-synuclein. It has been shown that the small molecule cuminaldehyde inhibits fibrillation of alpha-synuclein. [108] The Epstein-Barr virus has been implicated in these disorders. [109]

In rare cases of familial forms of Parkinson's disease, there is a mutation in the gene coding for alpha-synuclein. Five point mutations have been identified thus far: A53T, [110] A30P, [111] E46K, [112] H50Q, [113] and G51D; [114] however, in total, nineteen mutations in the SNCA gene have been associated with parkinsonism: A18T, A29S, A53E, A53V, E57A, V15A, T72M, L8I, V15D, M127I, P117S, M5T, G93A, E83Q, and A30G. [115]

It has been reported that some mutations influence the initiation and amplification steps of the aggregation process. [116] [117] Genomic duplication and triplication of the gene appear to be a rare cause of Parkinson's disease in other lineages, although more common than point mutations. [118] [119] Hence certain mutations of alpha-synuclein may cause it to form amyloid-like fibrils that contribute to Parkinson's disease. Over-expression of human wild-type or A53T-mutant alpha-synuclein in primates drives deposition of alpha-synuclein in the ventral midbrain, degeneration of the dopaminergic system and impaired motor performance. [120]

Certain sections of the alpha-synuclein protein may play a role in the tauopathies. [121] [122] [123]

A prion form of the protein alpha-synuclein may be a causal agent for the disease multiple system atrophy. [124] [125] [126]

Events in α-synuclein toxicity. [127]

Self-replicating "prion-like" amyloid assemblies of alpha-synuclein have been described that are invisible to the amyloid dye Thioflavin T and that can acutely spread in neurons in vitro and in vivo. [128]

Antibodies against alpha-synuclein have replaced antibodies against ubiquitin as the gold standard for immunostaining of Lewy bodies. [129] The central panel in the figure to the right shows the major pathway for protein aggregation. Monomeric α-synuclein is natively unfolded in solution but can also bind to membranes in an α-helical form. It seems likely that these two species exist in equilibrium within the cell, although this is unproven. From in vitro work, it is clear that unfolded monomer can aggregate first into small oligomeric species that can be stabilized by β-sheet-like interactions and then into higher molecular weight insoluble fibrils. In a cellular context, there is some evidence that the presence of lipids can promote oligomer formation: α-synuclein can also form annular, pore-like structures that interact with membranes. The deposition of α-synuclein into pathological structures such as Lewy bodies is probably a late event that occurs in some neurons. On the left hand side are some of the known modifiers of this process. Electrical activity in neurons changes the association of α-synuclein with vesicles and may also stimulate polo-like kinase 2 (PLK2), which has been shown to phosphorylate α-synuclein at Ser129. Other kinases have also been proposed to be involved. As well as phosphorylation, truncation through proteases such as calpains, and nitration, probably through nitric oxide (NO) or other reactive nitrogen species that are present during inflammation, all modify synuclein such that it has a higher tendency to aggregate. The addition of ubiquitin (shown as a black spot) to Lewy bodies is probably a secondary process to deposition. On the right are some of the proposed cellular targets for α-synuclein mediated toxicity, which include (from top to bottom) ER-golgi transport, synaptic vesicles, mitochondria and lysosomes and other proteolytic machinery. In each of these cases, it is proposed that α-synuclein has detrimental effects, listed below each arrow, although at this time it is not clear if any of these are either necessary or sufficient for toxicity in neurons.

Protein-protein interactions

Alpha-synuclein has been shown to interact with

See also

  • Synuclein
  • Contursi Terme - the village in Italy where a mutation in the α-synuclein gene led to a family history of Parkinson's disease

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000145335 – Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000025889 – Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. ^ a b c d e "Genetics Home Reference: SNCA". U.S. National Library of Medicine. 12 Nov 2013. Retrieved 14 Nov 2013.
  6. ^ Bonini NM, Giasson BI (November 2005). "Snaring the function of alpha-synuclein". Cell. 123 (3): 359–361. doi: 10.1016/j.cell.2005.10.017. PMID  16269324. S2CID  18772904.
  7. ^ Chandra S, Gallardo G, Fernández-Chacón R, Schlüter OM, Südhof TC (November 2005). "Alpha-synuclein cooperates with CSPalpha in preventing neurodegeneration". Cell. 123 (3): 383–396. doi: 10.1016/j.cell.2005.09.028. PMID  16269331. S2CID  18173864.
  8. ^ Chandra S, Chen X, Rizo J, Jahn R, Südhof TC (April 2003). "A broken alpha -helix in folded alpha -Synuclein". The Journal of Biological Chemistry. 278 (17): 15313–15318. doi: 10.1074/jbc.M213128200. PMID  12586824. S2CID  27116894.
  9. ^ a b c Sun J, Wang L, Bao H, Premi S, Das U, Chapman ER, Roy S (June 2019). "Functional cooperation of α-synuclein and VAMP2 in synaptic vesicle recycling". Proceedings of the National Academy of Sciences of the United States of America. 116 (23): 11113–11115. Bibcode: 2019PNAS..11611113S. doi: 10.1073/pnas.1903049116. PMC  6561242. PMID  31110017.
  10. ^ Atias M, Tevet Y, Sun J, Stavsky A, Tal S, Kahn J, et al. (June 2019). "Synapsins regulate α-synuclein functions". Proceedings of the National Academy of Sciences of the United States of America. 116 (23): 11116–11118. Bibcode: 2019PNAS..11611116A. doi: 10.1073/pnas.1903054116. PMC  6561288. PMID  31110014.
  11. ^ Spillantini MG, Schmidt ML, Lee VM, Trojanowkski JQ, Jakes R, Goedert M (28 August 1997). "α-Synuclein in Lewy bodies". Nature. 388 (6645): 839–840. Bibcode: 1997Natur.388..839G. doi: 10.1038/42166. PMID  9278044. S2CID  4419837.
  12. ^ Zigmond MJ, Coyle JT, Rowland JP (2015). Neurobiology of brain disorders : biological basis of neurological and psychiatric disorders. London. ISBN  978-0-12-398280-3. OCLC  896232309.{{ cite book}}: CS1 maint: location missing publisher ( link)
  13. ^ a b c Uéda K, Fukushima H, Masliah E, Xia Y, Iwai A, Yoshimoto M, et al. (December 1993). "Molecular cloning of cDNA encoding an unrecognized component of amyloid in Alzheimer disease". Proceedings of the National Academy of Sciences of the United States of America. 90 (23): 11282–11286. Bibcode: 1993PNAS...9011282U. doi: 10.1073/pnas.90.23.11282. PMC  47966. PMID  8248242.
  14. ^ Xia Y, Saitoh T, Uéda K, Tanaka S, Chen X, Hashimoto M, et al. (October 2001). "Characterization of the human alpha-synuclein gene: Genomic structure, transcription start site, promoter region and polymorphisms". Journal of Alzheimer's Disease. 3 (5): 485–494. doi: 10.3233/JAD-2001-3508. PMID  12214035. Archived from the original on 2016-05-14. Retrieved 2009-02-19.
  15. ^ Xia Y, Saitoh T, Uéda K, Tanaka S, Chen X, Hashimoto M, Hsu L, Conrad C, Sundsmo M, Yoshimoto M, Thal L, Katzman R, Masliah E (2002). "Characterization of the human alpha-synuclein gene: Genomic structure, transcription start site, promoter region and polymorphisms: Erratum p489 Fig 3". J. Alzheimers Dis. 4 (4): 337. Archived from the original on 2016-05-14. Retrieved 2009-02-19.
  16. ^ Jakes R, Spillantini MG, Goedert M (May 1994). "Identification of two distinct synucleins from human brain". FEBS Letters. 345 (1): 27–32. doi: 10.1016/0014-5793(94)00395-5. PMID  8194594. S2CID  36840279.
  17. ^ a b Iwai A, Masliah E, Yoshimoto M, Ge N, Flanagan L, de Silva HA, et al. (February 1995). "The precursor protein of non-A beta component of Alzheimer's disease amyloid is a presynaptic protein of the central nervous system". Neuron. 14 (2): 467–475. doi: 10.1016/0896-6273(95)90302-X. PMID  7857654. S2CID  17941420.
  18. ^ Filippini A, Gennarelli M, Russo I (March 2019). "α-Synuclein and Glia in Parkinson's Disease: A Beneficial or a Detrimental Duet for the Endo-Lysosomal System?". Cellular and Molecular Neurobiology. 39 (2): 161–168. doi: 10.1007/s10571-019-00649-9. PMID  30637614. S2CID  58006790.
  19. ^ Hoek KS, Schlegel NC, Eichhoff OM, Widmer DS, Praetorius C, Einarsson SO, et al. (December 2008). "Novel MITF targets identified using a two-step DNA microarray strategy". Pigment Cell & Melanoma Research. 21 (6): 665–676. doi: 10.1111/j.1755-148X.2008.00505.x. PMID  19067971. S2CID  24698373.
  20. ^ Yu S, Li X, Liu G, Han J, Zhang C, Li Y, et al. (March 2007). "Extensive nuclear localization of alpha-synuclein in normal rat brain neurons revealed by a novel monoclonal antibody". Neuroscience. 145 (2): 539–555. doi: 10.1016/j.neuroscience.2006.12.028. PMID  17275196. S2CID  37294944.
  21. ^ McLean PJ, Kawamata H, Ribich S, Hyman BT (March 2000). "Membrane association and protein conformation of alpha-synuclein in intact neurons. Effect of Parkinson's disease-linked mutations". The Journal of Biological Chemistry. 275 (12): 8812–8816. doi: 10.1074/jbc.275.12.8812. PMID  10722726.
  22. ^ Lee HJ, Choi C, Lee SJ (January 2002). "Membrane-bound alpha-synuclein has a high aggregation propensity and the ability to seed the aggregation of the cytosolic form". The Journal of Biological Chemistry. 277 (1): 671–678. doi: 10.1074/jbc.M107045200. PMID  11679584. S2CID  10438997.
  23. ^ Zhang L, Zhang C, Zhu Y, Cai Q, Chan P, Uéda K, et al. (December 2008). "Semi-quantitative analysis of alpha-synuclein in subcellular pools of rat brain neurons: an immunogold electron microscopic study using a C-terminal specific monoclonal antibody". Brain Research. 1244: 40–52. doi: 10.1016/j.brainres.2008.08.067. PMID  18817762. S2CID  1737088.
  24. ^ a b Liu G, Zhang C, Yin J, Li X, Cheng F, Li Y, et al. (May 2009). "alpha-Synuclein is differentially expressed in mitochondria from different rat brain regions and dose-dependently down-regulates complex I activity". Neuroscience Letters. 454 (3): 187–192. doi: 10.1016/j.neulet.2009.02.056. PMID  19429081. S2CID  45120745.
  25. ^ a b Beyer K (September 2006). "Alpha-synuclein structure, posttranslational modification and alternative splicing as aggregation enhancers". Acta Neuropathologica. 112 (3): 237–251. doi: 10.1007/s00401-006-0104-6. PMID  16845533. S2CID  1367846.
  26. ^ Uéda K, Saitoh T, Mori H (December 1994). "Tissue-dependent alternative splicing of mRNA for NACP, the precursor of non-A beta component of Alzheimer's disease amyloid". Biochemical and Biophysical Research Communications. 205 (2): 1366–1372. doi: 10.1006/bbrc.1994.2816. PMID  7802671.
  27. ^ a b c d Schaeffer E, Kluge A, Böttner M, Zunke F, Cossais F, Berg D, Arnold P (2020). "Alpha Synuclein Connects the Gut-Brain Axis in Parkinson's Disease Patients - A View on Clinical Aspects, Cellular Pathology and Analytical Methodology". Frontiers in Cell and Developmental Biology. 8: 573696. doi: 10.3389/fcell.2020.573696. PMC  7509446. PMID  33015066.
  28. ^ Anis E, Xie A, Brundin L, Brundin P (February 2022). "Digesting recent findings: gut alpha-synuclein, microbiome changes in Parkinson's disease". Trends in Endocrinology and Metabolism. 33 (2): 147–157. doi: 10.1016/j.tem.2021.11.005. PMID  34949514. S2CID  245351514.
  29. ^ a b c Sampson TR, Challis C, Jain N, Moiseyenko A, Ladinsky MS, Shastri GG, et al. (February 2020). Chiu IM, Garrett WS, Desjardins M (eds.). "A gut bacterial amyloid promotes α-synuclein aggregation and motor impairment in mice". eLife. 9: e53111. doi: 10.7554/eLife.53111. PMC  7012599. PMID  32043464.
  30. ^ Barrenschee M, Zorenkov D, Böttner M, Lange C, Cossais F, Scharf AB, et al. (January 2017). "Distinct pattern of enteric phospho-alpha-synuclein aggregates and gene expression profiles in patients with Parkinson's disease". Acta Neuropathologica Communications. 5 (1): 1. doi: 10.1186/s40478-016-0408-2. PMC  5217296. PMID  28057070.
  31. ^ Borghammer P, Van Den Berge N (2019-10-30). "Brain-First versus Gut-First Parkinson's Disease: A Hypothesis". Journal of Parkinson's Disease. 9 (s2): S281–S295. doi: 10.3233/jpd-191721. PMC  6839496. PMID  31498132.
  32. ^ van Rooijen BD, van Leijenhorst-Groener KA, Claessens MM, Subramaniam V (December 2009). "Tryptophan fluorescence reveals structural features of alpha-synuclein oligomers" (PDF). Journal of Molecular Biology. 394 (5): 826–833. doi: 10.1016/j.jmb.2009.10.021. PMID  19837084. S2CID  36085937.
  33. ^ Weinreb PH, Zhen W, Poon AW, Conway KA, Lansbury PT (October 1996). "NACP, a protein implicated in Alzheimer's disease and learning, is natively unfolded". Biochemistry. 35 (43): 13709–13715. doi: 10.1021/bi961799n. PMID  8901511.
  34. ^ Neupane K, Solanki A, Sosova I, Belov M, Woodside MT (January 2014). "Diverse metastable structures formed by small oligomers of α-synuclein probed by force spectroscopy". PLOS ONE. 9 (1): e86495. Bibcode: 2014PLoSO...986495N. doi: 10.1371/journal.pone.0086495. PMC  3901707. PMID  24475132.
  35. ^ George JM, Jin H, Woods WS, Clayton DF (August 1995). "Characterization of a novel protein regulated during the critical period for song learning in the zebra finch". Neuron. 15 (2): 361–372. doi: 10.1016/0896-6273(95)90040-3. PMID  7646890. S2CID  11421888.
  36. ^ Alim MA, Hossain MS, Arima K, Takeda K, Izumiyama Y, Nakamura M, et al. (January 2002). "Tubulin seeds alpha-synuclein fibril formation". The Journal of Biological Chemistry. 277 (3): 2112–2117. doi: 10.1074/jbc.M102981200. PMID  11698390. S2CID  84374030.
  37. ^ Alim MA, Ma QL, Takeda K, Aizawa T, Matsubara M, Nakamura M, et al. (August 2004). "Demonstration of a role for alpha-synuclein as a functional microtubule-associated protein". Journal of Alzheimer's Disease. 6 (4): 435–42, discussion 443–9. doi: 10.3233/JAD-2004-6412. PMID  15345814.
  38. ^ Bonini NM, Giasson BI (November 2005). "Snaring the function of alpha-synuclein". Cell. 123 (3): 359–361. doi: 10.1016/j.cell.2005.10.017. PMID  16269324. S2CID  18772904.
  39. ^ Chandra S, Gallardo G, Fernández-Chacón R, Schlüter OM, Südhof TC (November 2005). "Alpha-synuclein cooperates with CSPalpha in preventing neurodegeneration". Cell. 123 (3): 383–396. doi: 10.1016/j.cell.2005.09.028. PMID  16269331. S2CID  18173864.
  40. ^ a b c Burré J, Sharma M, Tsetsenis T, Buchman V, Etherton MR, Südhof TC (September 2010). "Alpha-synuclein promotes SNARE-complex assembly in vivo and in vitro". Science. 329 (5999): 1663–1667. Bibcode: 2010Sci...329.1663B. doi: 10.1126/science.1195227. PMC  3235365. PMID  20798282.
  41. ^ Cooper AA, Gitler AD, Cashikar A, Haynes CM, Hill KJ, Bhullar B, et al. (July 2006). "Alpha-synuclein blocks ER-Golgi traffic and Rab1 rescues neuron loss in Parkinson's models". Science. 313 (5785): 324–328. Bibcode: 2006Sci...313..324C. doi: 10.1126/science.1129462. PMC  1983366. PMID  16794039.
  42. ^ Kokhan VS, Afanasyeva MA, Van'kin GI (May 2012). "α-Synuclein knockout mice have cognitive impairments". Behavioural Brain Research. 231 (1): 226–230. doi: 10.1016/j.bbr.2012.03.026. PMID  22469626. S2CID  205884600.
  43. ^ Tauro M (4 February 2019). "Alpha-Synuclein Toxicity is Caused by Mitochondrial Dysfunction". Electronic Thesis and Dissertation Repository.
  44. ^ Willingham S, Outeiro TF, DeVit MJ, Lindquist SL, Muchowski PJ (December 2003). "Yeast genes that enhance the toxicity of a mutant huntingtin fragment or alpha-synuclein". Science. 302 (5651): 1769–1772. Bibcode: 2003Sci...302.1769W. doi: 10.1126/science.1090389. PMID  14657499. S2CID  43221047.
  45. ^ a b Uversky VN (October 2007). "Neuropathology, biochemistry, and biophysics of alpha-synuclein aggregation". Journal of Neurochemistry. 103 (1): 17–37. doi: 10.1111/j.1471-4159.2007.04764.x. PMID  17623039. S2CID  85334400.
  46. ^ Jao CC, Hegde BG, Chen J, Haworth IS, Langen R (December 2008). "Structure of membrane-bound alpha-synuclein from site-directed spin labeling and computational refinement". Proceedings of the National Academy of Sciences of the United States of America. 105 (50): 19666–19671. Bibcode: 2008PNAS..10519666J. doi: 10.1073/pnas.0807826105. PMC  2605001. PMID  19066219.
  47. ^ Zhu M, Li J, Fink AL (October 2003). "The association of alpha-synuclein with membranes affects bilayer structure, stability, and fibril formation". The Journal of Biological Chemistry. 278 (41): 40186–40197. doi: 10.1074/jbc.M305326200. PMID  12885775. S2CID  41555488.
  48. ^ Madine J, Doig AJ, Middleton DA (May 2006). "A study of the regional effects of alpha-synuclein on the organization and stability of phospholipid bilayers". Biochemistry. 45 (18): 5783–5792. doi: 10.1021/bi052151q. PMID  16669622.
  49. ^ Varkey J, Isas JM, Mizuno N, Jensen MB, Bhatia VK, Jao CC, et al. (October 2010). "Membrane curvature induction and tubulation are common features of synucleins and apolipoproteins". The Journal of Biological Chemistry. 285 (42): 32486–32493. doi: 10.1074/jbc.M110.139576. PMC  2952250. PMID  20693280.
  50. ^ Mizuno N, Varkey J, Kegulian NC, Hegde BG, Cheng N, Langen R, Steven AC (August 2012). "Remodeling of lipid vesicles into cylindrical micelles by α-synuclein in an extended α-helical conformation". The Journal of Biological Chemistry. 287 (35): 29301–29311. doi: 10.1074/jbc.M112.365817. PMC  3436199. PMID  22767608.
  51. ^ Varkey J, Mizuno N, Hegde BG, Cheng N, Steven AC, Langen R (June 2013). "α-Synuclein oligomers with broken helical conformation form lipoprotein nanoparticles". The Journal of Biological Chemistry. 288 (24): 17620–17630. doi: 10.1074/jbc.M113.476697. PMC  3682563. PMID  23609437.
  52. ^ a b Varkey J, Langen R (July 2017). "Membrane remodeling by amyloidogenic and non-amyloidogenic proteins studied by EPR". Journal of Magnetic Resonance. 280: 127–139. Bibcode: 2017JMagR.280..127V. doi: 10.1016/j.jmr.2017.02.014. PMC  5461824. PMID  28579098.
  53. ^ Zhu M, Qin ZJ, Hu D, Munishkina LA, Fink AL (July 2006). "Alpha-synuclein can function as an antioxidant preventing oxidation of unsaturated lipid in vesicles". Biochemistry. 45 (26): 8135–8142. doi: 10.1021/bi052584t. PMID  16800638.
  54. ^ a b Rawat A, Langen R, Varkey J (September 2018). "Membranes as modulators of amyloid protein misfolding and target of toxicity". Biochimica et Biophysica Acta (BBA) - Biomembranes. 1860 (9): 1863–1875. doi: 10.1016/j.bbamem.2018.04.011. PMC  6203680. PMID  29702073.
  55. ^ Flagmeier P, De S, Wirthensohn DC, Lee SF, Vincke C, Muyldermans S, et al. (June 2017). "Ultrasensitive Measurement of Ca2+ Influx into Lipid Vesicles Induced by Protein Aggregates". Angewandte Chemie. 56 (27): 7750–7754. doi: 10.1002/anie.201700966. PMC  5615231. PMID  28474754.
  56. ^ Sharon R, Bar-Joseph I, Frosch MP, Walsh DM, Hamilton JA, Selkoe DJ (February 2003). "The formation of highly soluble oligomers of alpha-synuclein is regulated by fatty acids and enhanced in Parkinson's disease". Neuron. 37 (4): 583–595. doi: 10.1016/s0896-6273(03)00024-2. PMID  12597857. S2CID  1604719.
  57. ^ Amer DA, Irvine GB, El-Agnaf OM (August 2006). "Inhibitors of alpha-synuclein oligomerization and toxicity: a future therapeutic strategy for Parkinson's disease and related disorders". Experimental Brain Research. 173 (2): 223–233. doi: 10.1007/s00221-006-0539-y. PMID  16733698. S2CID  24760126.
  58. ^ Ruipérez V, Darios F, Davletov B (October 2010). "Alpha-synuclein, lipids and Parkinson's disease". Progress in Lipid Research. 49 (4): 420–428. doi: 10.1016/j.plipres.2010.05.004. PMID  20580911.
  59. ^ Angelova PR, Horrocks MH, Klenerman D, Gandhi S, Abramov AY, Shchepinov MS (May 2015). "Lipid peroxidation is essential for α-synuclein-induced cell death". Journal of Neurochemistry. 133 (4): 582–589. doi: 10.1111/jnc.13024. PMC  4471127. PMID  25580849.
  60. ^ Larsen KE, Schmitz Y, Troyer MD, Mosharov E, Dietrich P, Quazi AZ, et al. (November 2006). "Alpha-synuclein overexpression in PC12 and chromaffin cells impairs catecholamine release by interfering with a late step in exocytosis". The Journal of Neuroscience. 26 (46): 11915–11922. doi: 10.1523/JNEUROSCI.3821-06.2006. PMC  6674868. PMID  17108165.
  61. ^ Nemani VM, Lu W, Berge V, Nakamura K, Onoa B, Lee MK, et al. (January 2010). "Increased expression of alpha-synuclein reduces neurotransmitter release by inhibiting synaptic vesicle reclustering after endocytosis". Neuron. 65 (1): 66–79. doi: 10.1016/j.neuron.2009.12.023. PMC  3119527. PMID  20152114.
  62. ^ Scott DA, Tabarean I, Tang Y, Cartier A, Masliah E, Roy S (June 2010). "A pathologic cascade leading to synaptic dysfunction in alpha-synuclein-induced neurodegeneration". The Journal of Neuroscience. 30 (24): 8083–8095. doi: 10.1523/JNEUROSCI.1091-10.2010. PMC  2901533. PMID  20554859.
  63. ^ Scott D, Roy S (July 2012). "α-Synuclein inhibits intersynaptic vesicle mobility and maintains recycling-pool homeostasis". The Journal of Neuroscience. 32 (30): 10129–10135. doi: 10.1523/JNEUROSCI.0535-12.2012. PMC  3426499. PMID  22836248.
  64. ^ Vargas KJ, Makani S, Davis T, Westphal CH, Castillo PE, Chandra SS (July 2014). "Synucleins regulate the kinetics of synaptic vesicle endocytosis". The Journal of Neuroscience. 34 (28): 9364–9376. doi: 10.1523/JNEUROSCI.4787-13.2014. PMC  4087213. PMID  25009269.
  65. ^ Wang L, Das U, Scott DA, Tang Y, McLean PJ, Roy S (October 2014). "α-synuclein multimers cluster synaptic vesicles and attenuate recycling". Current Biology. 24 (19): 2319–2326. Bibcode: 2014CBio...24.2319W. doi: 10.1016/j.cub.2014.08.027. PMC  4190006. PMID  25264250.
  66. ^ Burré J, Sharma M, Südhof TC (March 2018). "Cell Biology and Pathophysiology of α-Synuclein". Cold Spring Harbor Perspectives in Medicine. 8 (3): a024091. doi: 10.1101/cshperspect.a024091. PMC  5519445. PMID  28108534.
  67. ^ Burré J, Sharma M, Südhof TC (October 2012). "Systematic mutagenesis of α-synuclein reveals distinct sequence requirements for physiological and pathological activities". The Journal of Neuroscience. 32 (43): 15227–15242. doi: 10.1523/JNEUROSCI.3545-12.2012. PMC  3506191. PMID  23100443.
  68. ^ Burré J, Sharma M, Südhof TC (October 2014). "α-Synuclein assembles into higher-order multimers upon membrane binding to promote SNARE complex formation". Proceedings of the National Academy of Sciences of the United States of America. 111 (40): E4274–E4283. Bibcode: 2014PNAS..111E4274B. doi: 10.1073/pnas.1416598111. PMC  4210039. PMID  25246573.
  69. ^ Diao J, Burré J, Vivona S, Cipriano DJ, Sharma M, Kyoung M, et al. (April 2013). "Native α-synuclein induces clustering of synaptic-vesicle mimics via binding to phospholipids and synaptobrevin-2/VAMP2". eLife. 2: e00592. doi: 10.7554/eLife.00592. PMC  3639508. PMID  23638301.
  70. ^ a b Schaser AJ, Osterberg VR, Dent SE, Stackhouse TL, Wakeham CM, Boutros SW, et al. (July 2019). "Alpha-synuclein is a DNA binding protein that modulates DNA repair with implications for Lewy body disorders". Scientific Reports. 9 (1): 10919. Bibcode: 2019NatSR...910919S. doi: 10.1038/s41598-019-47227-z. PMC  6662836. PMID  31358782.
  71. ^ Ryskalin L, Busceti CL, Limanaqi F, Biagioni F, Gambardella S, Fornai F (2018). "A Focus on the Beneficial Effects of Alpha Synuclein and a Re-Appraisal of Synucleinopathies". Current Protein & Peptide Science. 19 (6): 598–611. doi: 10.2174/1389203718666171117110028. PMC  5925871. PMID  29150919.
  72. ^ Micheli L, Creanza TM, Ceccarelli M, D'Andrea G, Giacovazzo G, Ancona N, et al. (2021). "Transcriptome Analysis in a Mouse Model of Premature Aging of Dentate Gyrus: Rescue of Alpha-Synuclein Deficit by Virus-Driven Expression or by Running Restores the Defective Neurogenesis". Frontiers in Cell and Developmental Biology. 9: 696684. doi: 10.3389/fcell.2021.696684. PMC  8415876. PMID  34485283.
  73. ^ Perez-Villalba A, Sirerol-Piquer MS, Belenguer G, Soriano-Cantón R, Muñoz-Manchado AB, Villadiego J, et al. (January 2018). "Synaptic Regulator α-Synuclein in Dopaminergic Fibers Is Essentially Required for the Maintenance of Subependymal Neural Stem Cells". The Journal of Neuroscience. 38 (4): 814–825. doi: 10.1523/JNEUROSCI.2276-17.2017. PMC  6596232. PMID  29217686.
  74. ^ Clayton DF, George JM (June 1998). "The synucleins: a family of proteins involved in synaptic function, plasticity, neurodegeneration and disease". Trends in Neurosciences. 21 (6): 249–254. doi: 10.1016/S0166-2236(97)01213-7. PMID  9641537. S2CID  20654921.
  75. ^ Bussell R, Eliezer D (June 2003). "A structural and functional role for 11-mer repeats in alpha-synuclein and other exchangeable lipid binding proteins". Journal of Molecular Biology. 329 (4): 763–778. doi: 10.1016/S0022-2836(03)00520-5. PMID  12787676.
  76. ^ Uchihara T, Giasson BI (January 2016). "Propagation of alpha-synuclein pathology: hypotheses, discoveries, and yet unresolved questions from experimental and human brain studies". Acta Neuropathologica. 131 (1): 49–73. doi: 10.1007/s00401-015-1485-1. PMC  4698305. PMID  26446103.
  77. ^ Sorrentino ZA, Xia Y, Gorion KM, Hass E, Giasson BI (April 2020). "Carboxy-terminal truncations of mouse α-synuclein alter aggregation and prion-like seeding". FEBS Letters. 594 (8): 1271–1283. doi: 10.1002/1873-3468.13728. PMC  7188589. PMID  31912891.
  78. ^ Vlad C, Lindner K, Karreman C, Schildknecht S, Leist M, Tomczyk N, et al. (December 2011). "Autoproteolytic fragments are intermediates in the oligomerization/aggregation of the Parkinson's disease protein alpha-synuclein as revealed by ion mobility mass spectrometry". ChemBioChem. 12 (18): 2740–2744. doi: 10.1002/cbic.201100569. PMC  3461308. PMID  22162214.
  79. ^ Chiti F, Dobson CM (June 2017). "Protein Misfolding, Amyloid Formation, and Human Disease: A Summary of Progress Over the Last Decade". Annual Review of Biochemistry. 86: 27–68. doi: 10.1146/annurev-biochem-061516-045115. hdl: 2158/1117236. PMID  28498720.
  80. ^ a b c Ke PC, Zhou R, Serpell LC, Riek R, Knowles TP, Lashuel HA, et al. (August 2020). "Half a century of amyloids: past, present and future". Chemical Society Reviews. 49 (15): 5473–5509. doi: 10.1039/c9cs00199a. PMC  7445747. PMID  32632432.
  81. ^ Furukawa K, Aguirre C, So M, Sasahara K, Miyanoiri Y, Sakurai K, et al. (2020). "Isoelectric point-amyloid formation of α-synuclein extends the generality of the solubility and supersaturation-limited mechanism". Current Research in Structural Biology. 2: 35–44. doi: 10.1016/j.crstbi.2020.03.001. PMC  8244297. PMID  34235468.
  82. ^ Theillet FX, Binolfi A, Frembgen-Kesner T, Hingorani K, Sarkar M, Kyne C, et al. (July 2014). "Physicochemical properties of cells and their effects on intrinsically disordered proteins (IDPs)". Chemical Reviews. 114 (13): 6661–6714. doi: 10.1021/cr400695p. PMC  4095937. PMID  24901537.
  83. ^ Eisenberg D, Jucker M (March 2012). "The amyloid state of proteins in human diseases". Cell. 148 (6): 1188–1203. doi: 10.1016/j.cell.2012.02.022. PMC  3353745. PMID  22424229.
  84. ^ Bartels T, Choi JG, Selkoe DJ (August 2011). "α-Synuclein occurs physiologically as a helically folded tetramer that resists aggregation". Nature. 477 (7362): 107–110. Bibcode: 2011Natur.477..107B. doi: 10.1038/nature10324. PMC  3166366. PMID  21841800.
  85. ^ Wang W, Perovic I, Chittuluru J, Kaganovich A, Nguyen LT, Liao J, et al. (October 2011). "A soluble α-synuclein construct forms a dynamic tetramer". Proceedings of the National Academy of Sciences of the United States of America. 108 (43): 17797–17802. Bibcode: 2011PNAS..10817797W. doi: 10.1073/pnas.1113260108. PMC  3203798. PMID  22006323.
  86. ^ Dettmer U, Newman AJ, Luth ES, Bartels T, Selkoe D (March 2013). "In vivo cross-linking reveals principally oligomeric forms of α-synuclein and β-synuclein in neurons and non-neural cells". The Journal of Biological Chemistry. 288 (9): 6371–6385. doi: 10.1074/jbc.M112.403311. PMC  3585072. PMID  23319586.
  87. ^ Westphal CH, Chandra SS (January 2013). "Monomeric synucleins generate membrane curvature". The Journal of Biological Chemistry. 288 (3): 1829–1840. doi: 10.1074/jbc.M112.418871. PMC  3548493. PMID  23184946.
  88. ^ Trexler AJ, Rhoades E (May 2012). "N-Terminal acetylation is critical for forming α-helical oligomer of α-synuclein". Protein Science. 21 (5): 601–605. doi: 10.1002/pro.2056. PMC  3403458. PMID  22407793.
  89. ^ Binolfi A, Theillet FX, Selenko P (October 2012). "Bacterial in-cell NMR of human α-synuclein: a disordered monomer by nature?". Biochemical Society Transactions. 40 (5): 950–954. doi: 10.1042/BST20120096. PMID  22988846.
  90. ^ Bertini I, Felli IC, Gonnelli L, Vasantha Kumar MV, Pierattelli R (October 2011). "High-resolution characterization of intrinsic disorder in proteins: expanding the suite of (13)C-detected NMR spectroscopy experiments to determine key observables". ChemBioChem. 12 (15): 2347–2352. doi: 10.1002/cbic.201100406. PMID  23106082. S2CID  34960247.
  91. ^ Waudby CA, Camilloni C, Fitzpatrick AW, Cabrita LD, Dobson CM, Vendruscolo M, Christodoulou J (26 August 2013). "In-cell NMR characterization of the secondary structure populations of a disordered conformation of α-synuclein within E. coli cells". PLOS ONE. 8 (8): e72286. Bibcode: 2013PLoSO...872286W. doi: 10.1371/journal.pone.0072286. PMC  3753296. PMID  23991082.
  92. ^ Li C, Liu M (April 2013). "Protein dynamics in living cells studied by in-cell NMR spectroscopy". FEBS Letters. 587 (8): 1008–1011. doi: 10.1016/j.febslet.2012.12.023. PMID  23318712. S2CID  2649589.
  93. ^ a b Fauvet B, Mbefo MK, Fares MB, Desobry C, Michael S, Ardah MT, et al. (May 2012). "α-Synuclein in central nervous system and from erythrocytes, mammalian cells, and Escherichia coli exists predominantly as disordered monomer". The Journal of Biological Chemistry. 287 (19): 15345–15364. doi: 10.1074/jbc.M111.318949. PMC  3346117. PMID  22315227.
  94. ^ Pérez AC, Subrini O, Hessel A, Ladant D, Chenal A (January 2014). "Molecular Crowding Stabilizes Both the Intrinsically Disordered Calcium-Free State and the Folded Calcium-Bound State of an RTX Protein: Implication for Toxin Secretion". Biophysical Journal. 106 (2): 271a. Bibcode: 2014BpJ...106R.271S. doi: 10.1016/j.bpj.2013.11.1589.
  95. ^ Waudby CA, Mantle MD, Cabrita LD, Gladden LF, Dobson CM, Christodoulou J (July 2012). "Rapid distinction of intracellular and extracellular proteins using NMR diffusion measurements". Journal of the American Chemical Society. 134 (28): 11312–11315. doi: 10.1021/ja304912c. PMID  22694283.
  96. ^ Croke RL, Sallum CO, Watson E, Watt ED, Alexandrescu AT (August 2008). "Hydrogen exchange of monomeric alpha-synuclein shows unfolded structure persists at physiological temperature and is independent of molecular crowding in Escherichia coli". Protein Science. 17 (8): 1434–1445. doi: 10.1110/ps.033803.107. PMC  2492816. PMID  18493022.
  97. ^ Burré J, Vivona S, Diao J, Sharma M, Brunger AT, Südhof TC (June 2013). "Properties of native brain α-synuclein". Nature. 498 (7453): E4–6, discussion E6–7. Bibcode: 2013Natur.498E...4B. doi: 10.1038/nature12125. PMC  4255827. PMID  23765500.
  98. ^ Theillet FX, Binolfi A, Bekei B, Martorana A, Rose HM, Stuiver M, et al. (February 2016). "Structural disorder of monomeric α-synuclein persists in mammalian cells". Nature. 530 (7588): 45–50. Bibcode: 2016Natur.530...45T. doi: 10.1038/nature16531. hdl: 11336/53199. PMID  26808899. S2CID  4461465.
  99. ^ Spillantini MG, Schmidt ML, Lee VM, Trojanowski JQ, Jakes R, Goedert M (August 1997). "Alpha-synuclein in Lewy bodies". Nature. 388 (6645): 839–840. Bibcode: 1997Natur.388..839G. doi: 10.1038/42166. PMID  9278044. S2CID  4419837.
  100. ^ Mezey E, Dehejia A, Harta G, Papp MI, Polymeropoulos MH, Brownstein MJ (July 1998). "Alpha synuclein in neurodegenerative disorders: murderer or accomplice?". Nature Medicine. 4 (7): 755–757. doi: 10.1038/nm0798-755. PMID  9662355. S2CID  46196799.
  101. ^ Marvian AT, Koss DJ, Aliakbari F, Morshedi D, Outeiro TF (September 2019). "In vitro models of synucleinopathies: informing on molecular mechanisms and protective strategies". Journal of Neurochemistry. 150 (5): 535–565. doi: 10.1111/jnc.14707. PMID  31004503. S2CID  125080534.
  102. ^ Arima K, Hirai S, Sunohara N, Aoto K, Izumiyama Y, Uéda K, et al. (October 1999). "Cellular co-localization of phosphorylated tau- and NACP/alpha-synuclein-epitopes in lewy bodies in sporadic Parkinson's disease and in dementia with Lewy bodies". Brain Research. 843 (1–2): 53–61. doi: 10.1016/S0006-8993(99)01848-X. PMID  10528110. S2CID  11144367.
  103. ^ Arima K, Mizutani T, Alim MA, Tonozuka-Uehara H, Izumiyama Y, Hirai S, Uéda K (August 2000). "NACP/alpha-synuclein and tau constitute two distinctive subsets of filaments in the same neuronal inclusions in brains from a family of parkinsonism and dementia with Lewy bodies: double-immunolabeling fluorescence and electron microscopic studies". Acta Neuropathologica. 100 (2): 115–121. doi: 10.1007/s004010050002. PMID  10963357. S2CID  22950302.
  104. ^ Yokota O, Terada S, Ishizu H, Ujike H, Ishihara T, Nakashima H, et al. (December 2002). "NACP/alpha-synuclein, NAC, and beta-amyloid pathology of familial Alzheimer's disease with the E184D presenilin-1 mutation: a clinicopathological study of two autopsy cases". Acta Neuropathologica. 104 (6): 637–648. doi: 10.1007/s00401-002-0596-7. PMID  12410385. S2CID  42542929.
  105. ^ Kim HY, Heise H, Fernandez CO, Baldus M, Zweckstetter M (September 2007). "Correlation of amyloid fibril beta-structure with the unfolded state of alpha-synuclein". ChemBioChem. 8 (14): 1671–1674. doi: 10.1002/cbic.200700366. PMID  17722123. S2CID  41870508.
  106. ^ Sandal M, Valle F, Tessari I, Mammi S, Bergantino E, Musiani F, et al. (January 2008). "Conformational equilibria in monomeric alpha-synuclein at the single-molecule level". PLOS Biology. 6 (1): e6. doi: 10.1371/journal.pbio.0060006. PMC  2174973. PMID  18198943.
  107. ^ Schulz-Schaeffer WJ (August 2010). "The synaptic pathology of alpha-synuclein aggregation in dementia with Lewy bodies, Parkinson's disease and Parkinson's disease dementia". Acta Neuropathologica. 120 (2): 131–143. doi: 10.1007/s00401-010-0711-0. PMC  2892607. PMID  20563819.
  108. ^ Morshedi D, Aliakbari F (Spring 2012). "The Inhibitory Effects of Cuminaldehyde on Amyloid Fibrillation and Cytotoxicity of Alpha-synuclein". Modares Journal of Medical Sciences: Pathobiology. 15 (1): 45–60.
  109. ^ Woulfe J, Hoogendoorn H, Tarnopolsky M, Muñoz DG (November 2000). "Monoclonal antibodies against Epstein-Barr virus cross-react with alpha-synuclein in human brain". Neurology. 55 (9): 1398–1401. doi: 10.1212/WNL.55.9.1398. PMID  11087792. S2CID  84387269.
  110. ^ Polymeropoulos MH, Lavedan C, Leroy E, Ide SE, Dehejia A, Dutra A, et al. (June 1997). "Mutation in the alpha-synuclein gene identified in families with Parkinson's disease". Science. 276 (5321): 2045–2047. doi: 10.1126/science.276.5321.2045. PMID  9197268.
  111. ^ Krüger R, Kuhn W, Müller T, Woitalla D, Graeber M, Kösel S, et al. (February 1998). "Ala30Pro mutation in the gene encoding alpha-synuclein in Parkinson's disease". Nature Genetics. 18 (2): 106–108. doi: 10.1038/ng0298-106. PMID  9462735. S2CID  40777043.
  112. ^ Zarranz JJ, Alegre J, Gómez-Esteban JC, Lezcano E, Ros R, Ampuero I, et al. (February 2004). "The new mutation, E46K, of alpha-synuclein causes Parkinson and Lewy body dementia". Annals of Neurology. 55 (2): 164–173. doi: 10.1002/ana.10795. PMID  14755719. S2CID  55263.
  113. ^ Appel-Cresswell S, Vilarino-Guell C, Encarnacion M, Sherman H, Yu I, Shah B, et al. (June 2013). "Alpha-synuclein p.H50Q, a novel pathogenic mutation for Parkinson's disease". Movement Disorders. 28 (6): 811–813. doi: 10.1002/mds.25421. PMID  23457019. S2CID  13508258.
  114. ^ Lesage S, Anheim M, Letournel F, Bousset L, Honoré A, Rozas N, et al. (April 2013). "G51D α-synuclein mutation causes a novel parkinsonian-pyramidal syndrome". Annals of Neurology. 73 (4): 459–471. doi: 10.1002/ana.23894. PMID  23526723. S2CID  43305127.
  115. ^ Fevga C, Park Y, Lohmann E, Kievit AJ, Breedveld GJ, Ferraro F, et al. (August 2021). "A new alpha-synuclein missense variant (Thr72Met) in two Turkish families with Parkinson's disease". Parkinsonism & Related Disorders. 89: 63–72. doi: 10.1016/j.parkreldis.2021.06.023. PMC  8607441. PMID  34229155.
  116. ^ Giasson BI, Uryu K, Trojanowski JQ, Lee VM (March 1999). "Mutant and wild type human alpha-synucleins assemble into elongated filaments with distinct morphologies in vitro". The Journal of Biological Chemistry. 274 (12): 7619–7622. doi: 10.1074/jbc.274.12.7619. PMID  10075647.
  117. ^ Flagmeier P, Meisl G, Vendruscolo M, Knowles TP, Dobson CM, Buell AK, Galvagnion C (September 2016). "Mutations associated with familial Parkinson's disease alter the initiation and amplification steps of α-synuclein aggregation". Proceedings of the National Academy of Sciences of the United States of America. 113 (37): 10328–10333. Bibcode: 2016PNAS..11310328F. doi: 10.1073/pnas.1604645113. PMC  5027465. PMID  27573854.
  118. ^ Singleton AB, Farrer M, Johnson J, Singleton A, Hague S, Kachergus J, et al. (October 2003). "alpha-Synuclein locus triplication causes Parkinson's disease". Science. 302 (5646): 841. doi: 10.1126/science.1090278. PMID  14593171. S2CID  85938327.
  119. ^ Chartier-Harlin MC, Kachergus J, Roumier C, Mouroux V, Douay X, Lincoln S, et al. (2004). "Alpha-synuclein locus duplication as a cause of familial Parkinson's disease". Lancet. 364 (9440): 1167–1169. doi: 10.1016/S0140-6736(04)17103-1. PMID  15451224. S2CID  54419671.
  120. ^ Eslamboli A, Romero-Ramos M, Burger C, Bjorklund T, Muzyczka N, Mandel RJ, et al. (March 2007). "Long-term consequences of human alpha-synuclein overexpression in the primate ventral midbrain". Brain. 130 (Pt 3): 799–815. doi: 10.1093/brain/awl382. PMID  17303591.
  121. ^ Giasson BI, Forman MS, Higuchi M, Golbe LI, Graves CL, Kotzbauer PT, et al. (April 2003). "Initiation and synergistic fibrillization of tau and alpha-synuclein". Science. 300 (5619): 636–640. Bibcode: 2003Sci...300..636G. doi: 10.1126/science.1082324. PMID  12714745. S2CID  20223000.
  122. ^ Takeda A, Hashimoto M, Mallory M, Sundsumo M, Hansen L, Masliah E (March 2000). "C-terminal alpha-synuclein immunoreactivity in structures other than Lewy bodies in neurodegenerative disorders". Acta Neuropathologica. 99 (3): 296–304. doi: 10.1007/PL00007441. PMID  10663973. S2CID  27393027.
  123. ^ Williams T, Sorrentino Z, Weinrich M, Giasson BI, Chakrabarty P (2020-07-01). "Differential cross-seeding properties of tau and α-synuclein in mouse models of tauopathy and synucleinopathy". Brain Communications. 2 (2): fcaa090. doi: 10.1093/braincomms/fcaa090. PMC  7567170. PMID  33094280.
  124. ^ Prusiner SB, Woerman AL, Mordes DA, Watts JC, Rampersaud R, Berry DB, et al. (September 2015). "Evidence for α-synuclein prions causing multiple system atrophy in humans with parkinsonism". Proceedings of the National Academy of Sciences of the United States of America. 112 (38): E5308–E5317. Bibcode: 2015PNAS..112E5308P. doi: 10.1073/pnas.1514475112. PMC  4586853. PMID  26324905.
  125. ^ Weiler N (31 August 2015). "New Type of Prion May Cause, Transmit Neurodegeneration".
  126. ^ Rettner R (31 August 2015). "Another Fatal Brain Disease May Come from the Spread of 'Prion' Proteins". Wired Science.
  127. ^ Cookson MR (February 2009). "alpha-Synuclein and neuronal cell death". Molecular Neurodegeneration. 4 (1): 9. doi: 10.1186/1750-1326-4-9. PMC  2646729. PMID  19193223.
  128. ^ De Giorgi F, Laferrière F, Zinghirino F, Faggiani E, Lends A, Bertoni M, et al. (October 2020). "Novel self-replicating α-synuclein polymorphs that escape ThT monitoring can spontaneously emerge and acutely spread in neurons". Science Advances. 6 (40): eabc4364. Bibcode: 2020SciA....6.4364D. doi: 10.1126/sciadv.abc4364. PMC  7852382. PMID  33008896.
  129. ^ Fujiwara H, Hasegawa M, Dohmae N, Kawashima A, Masliah E, Goldberg MS, et al. (February 2002). "alpha-Synuclein is phosphorylated in synucleinopathy lesions". Nature Cell Biology. 4 (2): 160–164. doi: 10.1038/ncb748. PMID  11813001. S2CID  40155547.
  130. ^ Wersinger C, Sidhu A (April 2003). "Attenuation of dopamine transporter activity by alpha-synuclein". Neuroscience Letters. 340 (3): 189–192. doi: 10.1016/S0304-3940(03)00097-1. PMID  12672538. S2CID  54381509.
  131. ^ Lee FJ, Liu F, Pristupa ZB, Niznik HB (April 2001). "Direct binding and functional coupling of alpha-synuclein to the dopamine transporters accelerate dopamine-induced apoptosis". FASEB Journal. 15 (6): 916–926. doi: 10.1096/fj.00-0334com. PMID  11292651. S2CID  3406798.
  132. ^ Choi P, Golts N, Snyder H, Chong M, Petrucelli L, Hardy J, et al. (September 2001). "Co-association of parkin and alpha-synuclein". NeuroReport. 12 (13): 2839–2843. doi: 10.1097/00001756-200109170-00017. PMID  11588587. S2CID  83941655.
  133. ^ Kawahara K, Hashimoto M, Bar-On P, Ho GJ, Crews L, Mizuno H, et al. (March 2008). "alpha-Synuclein aggregates interfere with Parkin solubility and distribution: role in the pathogenesis of Parkinson disease". The Journal of Biological Chemistry. 283 (11): 6979–6987. doi: 10.1074/jbc.M710418200. PMID  18195004.
  134. ^ Ahn BH, Rhim H, Kim SY, Sung YM, Lee MY, Choi JY, et al. (April 2002). "alpha-Synuclein interacts with phospholipase D isozymes and inhibits pervanadate-induced phospholipase D activation in human embryonic kidney-293 cells". The Journal of Biological Chemistry. 277 (14): 12334–12342. doi: 10.1074/jbc.M110414200. PMID  11821392. S2CID  85695661.
  135. ^ Neystat M, Rzhetskaya M, Kholodilov N, Burke RE (June 2002). "Analysis of synphilin-1 and synuclein interactions by yeast two-hybrid beta-galactosidase liquid assay". Neuroscience Letters. 325 (2): 119–123. doi: 10.1016/S0304-3940(02)00253-7. PMID  12044636. S2CID  11517781.
  136. ^ Reed JC, Meister L, Tanaka S, Cuddy M, Yum S, Geyer C, Pleasure D (December 1991). "Differential expression of bcl2 protooncogene in neuroblastoma and other human tumor cell lines of neural origin". Cancer Research. 51 (24): 6529–6538. PMID  1742726.
  137. ^ Kawamata H, McLean PJ, Sharma N, Hyman BT (May 2001). "Interaction of alpha-synuclein and synphilin-1: effect of Parkinson's disease-associated mutations". Journal of Neurochemistry. 77 (3): 929–934. doi: 10.1046/j.1471-4159.2001.00301.x. PMID  11331421. S2CID  83885937.
  138. ^ Engelender S, Kaminsky Z, Guo X, Sharp AH, Amaravi RK, Kleiderlein JJ, et al. (May 1999). "Synphilin-1 associates with alpha-synuclein and promotes the formation of cytosolic inclusions". Nature Genetics. 22 (1): 110–114. doi: 10.1038/8820. PMID  10319874. S2CID  2611127.
  139. ^ Lee VM, Giasson BI, Trojanowski JQ (March 2004). "More than just two peas in a pod: common amyloidogenic properties of tau and alpha-synuclein in neurodegenerative diseases". Trends in Neurosciences. 27 (3): 129–134. doi: 10.1016/j.tins.2004.01.007. PMID  15036877. S2CID  9545889.
  140. ^ Jensen PH, Hager H, Nielsen MS, Hojrup P, Gliemann J, Jakes R (September 1999). "alpha-synuclein binds to Tau and stimulates the protein kinase A-catalyzed tau phosphorylation of serine residues 262 and 356". The Journal of Biological Chemistry. 274 (36): 25481–25489. doi: 10.1074/jbc.274.36.25481. PMID  10464279. S2CID  23877061.
  141. ^ Giasson BI, Lee VM, Trojanowski JQ (2003). "Interactions of amyloidogenic proteins". Neuromolecular Medicine. 4 (1–2): 49–58. doi: 10.1385/NMM:4:1-2:49. PMID  14528052. S2CID  9086733.
  142. ^ Ono K, Takahashi R, Ikeda T, Yamada M (September 2012). "Cross-seeding effects of amyloid β-protein and α-synuclein". Journal of Neurochemistry. 122 (5): 883–890. doi: 10.1111/j.1471-4159.2012.07847.x. hdl: 2297/34736. PMID  22734715. S2CID  17593306.

Further reading

External links

Retrieved from " https://en.wikipedia.org/?title=Alpha-synuclein&oldid=1221090696"
From Wikipedia, the free encyclopedia
(Redirected from Alpha synuclein)
SNCA
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
Aliases SNCA, NACP, PARK1, PARK4, PD1, synuclein alpha
External IDs OMIM: 163890; MGI: 1277151; HomoloGene: 293; GeneCards: SNCA; OMA: SNCA - orthologs
Orthologs
SpeciesHumanMouse
Entrez

6622

20617

Ensembl

ENSG00000145335

ENSMUSG00000025889

UniProt

P37840

O55042

RefSeq (mRNA)

NM_001042451
NM_009221

RefSeq (protein)

NP_001035916
NP_033247

Location (UCSC) Chr 4: 89.7 – 89.84 Mb Chr 6: 60.71 – 60.81 Mb
PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

Alpha-synuclein (aSyn) is a protein that, in humans, is encoded by the SNCA gene. [5] Alpha-synuclein is a neuronal protein that regulates synaptic vesicle trafficking and subsequent neurotransmitter release. [6] [7]

It is abundant in the brain, while smaller amounts are found in the heart, muscle and other tissues. In the brain, alpha-synuclein is found mainly in the axon terminals of presynaptic neurons. [5] Within these terminals, alpha-synuclein interacts with phospholipids [8] and proteins. [5] [9] [10] Presynaptic terminals release chemical messengers, called neurotransmitters, from compartments known as synaptic vesicles. The release of neurotransmitters relays signals between neurons and is critical for normal brain function. [5]

In Parkinson's disease and other synucleinopathies, insoluble forms of alpha-synuclein accumulate as inclusions in Lewy bodies. [11]

Familial Parkinson's disease is associated with mutations in the -synuclein (SNCA) gene. In the process of seeded nucleation, alpha-synuclein acquires a cross-sheet structure similar to other amyloids. [12]

The human alpha-synuclein protein is made of 140 amino acids. [13] [14] [15] An alpha-synuclein fragment, known as the non- amyloid beta (non-Abeta) component (NAC) of Alzheimer's disease amyloid, originally found in an amyloid-enriched fraction, was shown to be a fragment of its precursor protein, NACP. [13] It was later determined that NACP is the human homologue of synuclein in electric rays, genus Torpedo. Therefore, NACP is now referred to as human alpha-synuclein. [16]

Tissue expression

Alpha-synuclein is a synuclein protein primarily found in neural tissue, making up as much as one percent of all proteins in the cytosol of brain cells. [17] It is expressed highly in neurons within the frontal cortex, hippocampus, striatum, and olfactory bulb, [17] but can also be found in the non-neuronal glial cells. [18] In melanocytes, SNCA protein expression may be regulated by microphthalmia-associated transcription factor (MITF). [19]

It has been established that alpha-synuclein is extensively localized in the nucleus of mammalian brain neurons, suggesting a role of alpha-synuclein in the nucleus. [20] Synuclein is however found predominantly in the presynaptic termini, in both free or membrane-bound forms, [21] with roughly 15% of synuclein being membrane-bound at any moment in neurons. [22]

It has also been shown that alpha-synuclein is localized in neuronal mitochondria. [23] [24] Alpha-synuclein is highly expressed in the mitochondria in olfactory bulb, hippocampus, striatum and thalamus, where the cytosolic alpha-synuclein is also rich. However, the cerebral cortex and cerebellum are two exceptions, which contain rich cytosolic alpha-synuclein but very low levels of mitochondrial alpha-synuclein. It has been shown that alpha-synuclein is localized in the inner membrane of mitochondria, and that the inhibitory effect of alpha-synuclein on complex I activity of the mitochondrial respiratory chain is dose-dependent. Thus, it is suggested that alpha-synuclein in mitochondria is differentially expressed in different brain regions and the background levels of mitochondrial alpha-synuclein may be a potential factor affecting mitochondrial function and predisposing some neurons to degeneration. [24]

At least three isoforms of synuclein are produced through alternative splicing. [25] The majority form of the protein, and the one most investigated, is the full-length protein of 140 amino acids. Other isoforms are alpha-synuclein-126, which lacks residues 41-54 due to loss of exon 3; and alpha-synuclein-112, [26] which lacks residues 103-130 due to loss of exon 5. [25]

In the enteric nervous system (ENS)

First characterisations of aSyn aggregates in the ENS of PD patients has been performed on autopsied specimens in the late 1980s. [27] It is yet unknown if the microbiome changes associated with PD are consequential to the illness process or main pathophysiology, or both. [28]

Individuals diagnosed with various synucleinopathies often display constipation and other GI dysfunctions years prior to the onset of movement dysfunction. [29]

Alpha synuclein potentially connects the gut-brain axis in Parkinson's disease patients. Common inherited Parkinson disease is associated with mutations in the alpha-synuclein (SNCA) gene. In the process of seeded nucleation, alpha-synuclein acquires a cross-sheet structure similar to other amyloids. [27]

The Enterobacteriaceae, which are quite common in the human gut, can create curli, which are functional amyloid proteins. The unfolded amyloid CsgA, which is secreted by bacteria and later aggregates extracellularly to create biofilms, mediates adherence to epithelial cells, and aids in bacteriophage defense, forms the curli fibers. Oral injection of curli-producing bacteria can also boost formation and aggregation of the amyloid protein Syn in old rats and nematodes. Host inflammation responses in the intestinal tract and periphery are modulated by curli exposure. Studies in biochemistry show that endogenous, bacterial chaperones of curli are capable of briefly interacting with Syn and controlling its aggregation. [29]

The clinical and pathological findings support the hypothesis that aSyn disease in PD occurs via a gut-brain pathway. For early diagnosis and early management in the phase of creation and propagation of aSyn, it is therefore of utmost importance to identify pathogenic aSyn in the digestive system, for example, by gastrointestinal tract (GIT) biopsies. [27]

According to a growing body of research, intestinal dysbiosis may be a major factor in the development of Parkinson's disease by encouraging intestinal permeability, gastrointestinal inflammation, and the aggregation and spread of asyn. [27]

Not just the CNS but other peripheral tissues, such as the GIT, have physiological aSyn expression as well as its phosphorylated variants. [30] As suggested by Borghammer and Van Den Berge (2019), one approach is to recognise the possibility of PD subtypes with various aSyn propagation methods, including either a peripheral nervous system (PNS)-first or a CNS-first route. [31]

While the GI tract has been linked to other neurological disorders such autism spectrum disorder, depression, anxiety, and Alzheimer's disease, protein aggregation and/or inflammation in the gut represent a new topic of investigation in synucleinopathies. [29]

Structure

Alpha-synuclein in solution is considered to be an intrinsically disordered protein, i.e. it lacks a single stable 3D structure. [32] [33] As of 2014, an increasing number of reports suggest, however, the presence of partial structures or mostly structured oligomeric states in the solution structure of alpha-synuclein even in the absence of lipids. This trend is also supported by a large number of single molecule ( optical tweezers) measurements on single copies of monomeric alpha-synuclein as well as covalently enforced dimers or tetramers of alpha-synuclein. [34]

Alpha-synuclein is specifically upregulated in a discrete population of presynaptic terminals of the brain during a period of acquisition-related synaptic rearrangement. [35] It has been shown that alpha-synuclein significantly interacts with tubulin, [36] and that alpha-synuclein may have activity as a potential microtubule-associated protein, like tau. [37] Evidence suggests that alpha-synuclein functions as a molecular chaperone in the formation of SNARE complexes. [38] [39] In particular, it simultaneously binds to phospholipids of the plasma membrane via its N-terminus domain and to synaptobrevin-2 via its C-terminus domain, with increased importance during synaptic activity. [40] Indeed, there is growing evidence that alpha-synuclein is involved in the functioning of the neuronal Golgi apparatus and vesicle trafficking. [41]

Apparently, alpha-synuclein is essential for normal development of the cognitive functions. Knock-out mice with the targeted inactivation of the expression of alpha-synuclein show impaired spatial learning and working memory. [42]

Interaction with lipid membranes

Experimental evidence has been collected on the interaction of alpha-synuclein with membrane and its involvement with membrane composition and turnover. Yeast genome screening has found that several genes that deal with lipid metabolism and mitochondrial fusion play a role in alpha-synuclein toxicity. [43] [44] Conversely, alpha-synuclein expression levels can affect the viscosity and the relative amount of fatty acids in the lipid bilayer. [45]

Alpha-synuclein is known to directly bind to lipid membranes, associating with the negatively charged surfaces of phospholipids. [45] Alpha-synuclein forms an extended helical structure on small unilamellar vesicles. [46] A preferential binding to small vesicles has been found. [47] The binding of alpha-synuclein to lipid membranes has complex effects on the latter, altering the bilayer structure and leading to the formation of small vesicles. [48] Alpha-synuclein has been shown to bend membranes of negatively charged phospholipid vesicles and form tubules from large lipid vesicles. [49] Using cryo-EM it was shown that these are micellar tubes of ~5-6 nm diameter. [50] Alpha-synuclein has also been shown to form lipid disc-like particles similar to apolipoproteins. [51] EPR studies have shown that the structure of alpha synuclein is dependent on the binding surface. [52] The protein adopts a broken-helical conformation on lipoprotein particles while it forms an extended helical structure on lipid vesicles and membrane tubes. [52] Studies have also suggested a possible antioxidant activity of alpha-synuclein in the membrane. [53]

Photomicrographs of regions of substantia nigra in a patient showing Lewy bodies and Lewy neurites in various magnifications

Membrane interaction of alpha-synuclein modulates or affects its rate of aggregation. [54] The membrane-mediated modulation of aggregation is very similar to that observed for other amyloid proteins such as IAPP and abeta. [54] Aggregated states of alpha-synuclein permeate the membrane of lipid vesicles. [55] They are formed upon interaction with peroxidation-prone polyunsaturated fatty acids (PUFA) but not with monounsaturated fatty acids [56] and the binding of lipid autoxidation-promoting transition metals such as iron or copper provokes oligomerization of alpha-synuclein. [57] The aggregated alpha-synuclein has a specific activity for peroxidized lipids and induces lipid autoxidation in PUFA-rich membranes of both neurons and astrocytes, decreasing resistance to apoptosis. [58] Lipid autoxidation is inhibited if the cells are pre-incubated with isotope-reinforced PUFAs (D-PUFA). [59]

Function

Although the function of alpha-synuclein is not well understood, studies suggest that it plays a role in restricting the mobility of synaptic vesicles, consequently attenuating synaptic vesicle recycling and neurotransmitter release. [60] [61] [62] [63] [64] [65] [9] An alternate view is that alpha-synuclein binds to VAMP2 (a synaptobrevin) and stabilizes SNARE complexes; [40] [66] [67] [68] [69] though recent studies indicate that alpha-synuclein–VAMP2 binding is critical for alpha-synuclein-mediated attenuation of synaptic vesicle recycling, connecting the two seemingly divergent views. [9] It may also help regulate the release of dopamine, a type of neurotransmitter that is critical for controlling the start and stop of voluntary and involuntary movements. [5]

Alpha-synuclein modulates DNA repair processes, including repair of double-strand breaks (DSBs). [70] DNA damage response markers co-localize with alpha-synuclein to form discrete foci in human cells and mouse brain. Depletion of alpha-synuclein in human cells causes increased introduction of DNA DSBs after exposure to bleomycin and reduced ability to repair these DSBs. In addition, alpha-synuclein knockout mice display a higher level of DSBs, and this problem can be alleviated by transgenic reintroduction of human alpha-synuclein. Alpha-synuclein promotes the DSB repair pathway referred to as non-homologous end joining. [70] The DNA repair function of alpha-synuclein appears to be compromised in Lewy body inclusion bearing neurons, and this may trigger cell death.

Proneurogenic function of alpha-synuclein

In some neurodegenerative diseases, alpha-synuclein produces insoluble inclusion bodies. These diseases, known as synucleinopathies, are connected with either higher levels of normal alpha-synuclein or its mutant variants. [71] The normal physiological role of Snca, however, has not yet been thoroughly explained. In fact, physiological Snca has been demonstrated to have a neuroprotective impact by inhibiting apoptosis induced by several types of apoptotic stimuli, or by regulating the expression of proteins involved in apoptotic pathways. Recently it has been demonstrated that up-regulation of alpha-synuclein in the dentate gyrus (a neurogenic niche where new neurons are generated throughout life) activates stem cells, in a model of premature neural aging. This model shows reduced expression of alpha-synuclein and reduced proliferation of stem cells, as is physiologically observed during aging. Exogenous alpha-synuclein in the dentate gyrus is able to rescue this defect. Moreover, alpha-synuclein also boosts the proliferation of dentate gyrus progenitor neural cells in wild-type young mice. Thus, alpha-synuclein represents an effector for neural stem and progenitor cell activation. [72] Similarly, alpha-synuclein has been found to be required to maintain stem cells of the SVZ (subventricular zone, i.e., another neurogenic niche) in a cycling state. [73]

Sequence

Alpha-synuclein primary structure is usually divided in three distinct domains:

  • Residues 1-60: An amphipathic N-terminal region dominated by four 11-residue repeats including the consensus sequence KTKEGV. This sequence has a structural alpha helix propensity similar to apolipoproteins-binding domains. [74] It is a highly conserved terminal that interacts with acidic lipid membranes, and all the discovered point mutations of the SNCA gene are located within this terminal. [75]
  • Residues 61-95: A central hydrophobic region which includes the non-amyloid-β component (NAC) region, involved in protein aggregation. [13] This domain is unique to alpha-synuclein among the synuclein family. [76]
  • Residues 96-140: a highly acidic and proline-rich region which has no distinct structural propensity. This domain plays an important role in the function, solubility and interaction of alpha-synuclein with other proteins. [77] [40]

Autoproteolytic activity

The use of high-resolution ion-mobility mass spectrometry (IMS-MS) on HPLC-purified alpha-synuclein in vitro has shown alpha-synuclein to be autoproteolytic (self- proteolytic), generating a variety of small molecular weight fragments upon incubation. [78] The 14.46  kDa protein was found to generate numerous smaller fragments, including 12.16 kDa ( amino acids 14–133) and 10.44 kDa (40-140) fragments formed through C- and N-terminal truncation and a 7.27 kDa C-terminal fragment (72-140). The 7.27 kDa fragment, which contains the majority of the NAC region, aggregated considerably faster than full-length alpha-synuclein. It is possible that these autoproteolytic products play a role as intermediates or cofactors in the aggregation of alpha-synuclein in vivo.

Clinical significance

Positive α-Synuclein staining of a Lewy body from a patient who had Parkinson's disease.

Alpha synuclein, having no single, well-defined tertiary structure, is an intrinsically disordered protein, [79] [80] with a pI value of 4.7, [81] which, under certain pathological conditions, can misfold in a way that exposes its core hydrophobic residues to the intracellular milieu, thus providing the opportunity for hydrophobic interactions to occur with a similar, equally exposed protein. [80] This could lead to self assembly and subsequent aggregation into large, insoluble fibrils known as amyloids. [80] The conversion of soluble alpha synuclein into highly ordered, cross-β sheet, fibrillar structures does not, as previously thought, follow a two-step mechanism, rather, occurs through a series of transient, soluble oligomeric intermediates. [82] [83] In 2011, two groups published their findings that unmutated α-synuclein forms a stably folded tetramer that resists aggregation, asserting that this folded tetramer represented the relevant in vivo structure in cells, [84] [85] thereby relieving alpha synuclein of its disordered status. Proponents of the tetramer hypothesis argued that in vivo cross-linking in bacteria, primary neurons and human erythroleukemia cells confirmed the presence of labile, tetrameric species. [86] [87] [88] However, despite numerous in-cell NMR reports demonstrating that alpha synuclein is indeed monomeric and disordered in intact E. coli cells, [89] [90] [91] [92] [93] [94] [95] [96] it is still a matter of debate in the field despite an ever growing mountain of conflicting reports. [93] [97] [98] Nevertheless, alpha-synuclein aggregates to form insoluble fibrils in pathological conditions characterized by Lewy bodies, such as Parkinson's disease, dementia with Lewy bodies and multiple system atrophy. [99] [100] These disorders are known as synucleinopathies. In vitro models of synucleinopathies revealed that aggregation of alpha-synuclein may lead to various cellular disorders including microtubule impairment, synaptic and mitochondrial dysfunctions, oxidative stress as well as dysregulation of Calcium signaling, proteasomal and lysosomal pathway. [101] Alpha-synuclein is the primary structural component of Lewy body fibrils. Occasionally, Lewy bodies contain tau protein; [102] however, alpha-synuclein and tau constitute two distinctive subsets of filaments in the same inclusion bodies. [103] Alpha-synuclein pathology is also found in both sporadic and familial cases with Alzheimer's disease. [104]

The aggregation mechanism of alpha-synuclein is uncertain. There is evidence of a structured intermediate rich in beta structure that can be the precursor of aggregation and, ultimately, Lewy bodies. [105] A single molecule study in 2008 suggests alpha-synuclein exists as a mix of unstructured, alpha-helix, and beta-sheet-rich conformers in equilibrium. Mutations or buffer conditions known to improve aggregation strongly increase the population of the beta conformer, thus suggesting this could be a conformation related to pathogenic aggregation. [106] One theory is that the majority of alpha-synuclein aggregates are located in the presynapse as smaller deposits which causes synaptic dysfunction. [107] Among the strategies for treating synucleinopathies are compounds that inhibit aggregation of alpha-synuclein. It has been shown that the small molecule cuminaldehyde inhibits fibrillation of alpha-synuclein. [108] The Epstein-Barr virus has been implicated in these disorders. [109]

In rare cases of familial forms of Parkinson's disease, there is a mutation in the gene coding for alpha-synuclein. Five point mutations have been identified thus far: A53T, [110] A30P, [111] E46K, [112] H50Q, [113] and G51D; [114] however, in total, nineteen mutations in the SNCA gene have been associated with parkinsonism: A18T, A29S, A53E, A53V, E57A, V15A, T72M, L8I, V15D, M127I, P117S, M5T, G93A, E83Q, and A30G. [115]

It has been reported that some mutations influence the initiation and amplification steps of the aggregation process. [116] [117] Genomic duplication and triplication of the gene appear to be a rare cause of Parkinson's disease in other lineages, although more common than point mutations. [118] [119] Hence certain mutations of alpha-synuclein may cause it to form amyloid-like fibrils that contribute to Parkinson's disease. Over-expression of human wild-type or A53T-mutant alpha-synuclein in primates drives deposition of alpha-synuclein in the ventral midbrain, degeneration of the dopaminergic system and impaired motor performance. [120]

Certain sections of the alpha-synuclein protein may play a role in the tauopathies. [121] [122] [123]

A prion form of the protein alpha-synuclein may be a causal agent for the disease multiple system atrophy. [124] [125] [126]

Events in α-synuclein toxicity. [127]

Self-replicating "prion-like" amyloid assemblies of alpha-synuclein have been described that are invisible to the amyloid dye Thioflavin T and that can acutely spread in neurons in vitro and in vivo. [128]

Antibodies against alpha-synuclein have replaced antibodies against ubiquitin as the gold standard for immunostaining of Lewy bodies. [129] The central panel in the figure to the right shows the major pathway for protein aggregation. Monomeric α-synuclein is natively unfolded in solution but can also bind to membranes in an α-helical form. It seems likely that these two species exist in equilibrium within the cell, although this is unproven. From in vitro work, it is clear that unfolded monomer can aggregate first into small oligomeric species that can be stabilized by β-sheet-like interactions and then into higher molecular weight insoluble fibrils. In a cellular context, there is some evidence that the presence of lipids can promote oligomer formation: α-synuclein can also form annular, pore-like structures that interact with membranes. The deposition of α-synuclein into pathological structures such as Lewy bodies is probably a late event that occurs in some neurons. On the left hand side are some of the known modifiers of this process. Electrical activity in neurons changes the association of α-synuclein with vesicles and may also stimulate polo-like kinase 2 (PLK2), which has been shown to phosphorylate α-synuclein at Ser129. Other kinases have also been proposed to be involved. As well as phosphorylation, truncation through proteases such as calpains, and nitration, probably through nitric oxide (NO) or other reactive nitrogen species that are present during inflammation, all modify synuclein such that it has a higher tendency to aggregate. The addition of ubiquitin (shown as a black spot) to Lewy bodies is probably a secondary process to deposition. On the right are some of the proposed cellular targets for α-synuclein mediated toxicity, which include (from top to bottom) ER-golgi transport, synaptic vesicles, mitochondria and lysosomes and other proteolytic machinery. In each of these cases, it is proposed that α-synuclein has detrimental effects, listed below each arrow, although at this time it is not clear if any of these are either necessary or sufficient for toxicity in neurons.

Protein-protein interactions

Alpha-synuclein has been shown to interact with

See also

  • Synuclein
  • Contursi Terme - the village in Italy where a mutation in the α-synuclein gene led to a family history of Parkinson's disease

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000145335 – Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000025889 – Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. ^ a b c d e "Genetics Home Reference: SNCA". U.S. National Library of Medicine. 12 Nov 2013. Retrieved 14 Nov 2013.
  6. ^ Bonini NM, Giasson BI (November 2005). "Snaring the function of alpha-synuclein". Cell. 123 (3): 359–361. doi: 10.1016/j.cell.2005.10.017. PMID  16269324. S2CID  18772904.
  7. ^ Chandra S, Gallardo G, Fernández-Chacón R, Schlüter OM, Südhof TC (November 2005). "Alpha-synuclein cooperates with CSPalpha in preventing neurodegeneration". Cell. 123 (3): 383–396. doi: 10.1016/j.cell.2005.09.028. PMID  16269331. S2CID  18173864.
  8. ^ Chandra S, Chen X, Rizo J, Jahn R, Südhof TC (April 2003). "A broken alpha -helix in folded alpha -Synuclein". The Journal of Biological Chemistry. 278 (17): 15313–15318. doi: 10.1074/jbc.M213128200. PMID  12586824. S2CID  27116894.
  9. ^ a b c Sun J, Wang L, Bao H, Premi S, Das U, Chapman ER, Roy S (June 2019). "Functional cooperation of α-synuclein and VAMP2 in synaptic vesicle recycling". Proceedings of the National Academy of Sciences of the United States of America. 116 (23): 11113–11115. Bibcode: 2019PNAS..11611113S. doi: 10.1073/pnas.1903049116. PMC  6561242. PMID  31110017.
  10. ^ Atias M, Tevet Y, Sun J, Stavsky A, Tal S, Kahn J, et al. (June 2019). "Synapsins regulate α-synuclein functions". Proceedings of the National Academy of Sciences of the United States of America. 116 (23): 11116–11118. Bibcode: 2019PNAS..11611116A. doi: 10.1073/pnas.1903054116. PMC  6561288. PMID  31110014.
  11. ^ Spillantini MG, Schmidt ML, Lee VM, Trojanowkski JQ, Jakes R, Goedert M (28 August 1997). "α-Synuclein in Lewy bodies". Nature. 388 (6645): 839–840. Bibcode: 1997Natur.388..839G. doi: 10.1038/42166. PMID  9278044. S2CID  4419837.
  12. ^ Zigmond MJ, Coyle JT, Rowland JP (2015). Neurobiology of brain disorders : biological basis of neurological and psychiatric disorders. London. ISBN  978-0-12-398280-3. OCLC  896232309.{{ cite book}}: CS1 maint: location missing publisher ( link)
  13. ^ a b c Uéda K, Fukushima H, Masliah E, Xia Y, Iwai A, Yoshimoto M, et al. (December 1993). "Molecular cloning of cDNA encoding an unrecognized component of amyloid in Alzheimer disease". Proceedings of the National Academy of Sciences of the United States of America. 90 (23): 11282–11286. Bibcode: 1993PNAS...9011282U. doi: 10.1073/pnas.90.23.11282. PMC  47966. PMID  8248242.
  14. ^ Xia Y, Saitoh T, Uéda K, Tanaka S, Chen X, Hashimoto M, et al. (October 2001). "Characterization of the human alpha-synuclein gene: Genomic structure, transcription start site, promoter region and polymorphisms". Journal of Alzheimer's Disease. 3 (5): 485–494. doi: 10.3233/JAD-2001-3508. PMID  12214035. Archived from the original on 2016-05-14. Retrieved 2009-02-19.
  15. ^ Xia Y, Saitoh T, Uéda K, Tanaka S, Chen X, Hashimoto M, Hsu L, Conrad C, Sundsmo M, Yoshimoto M, Thal L, Katzman R, Masliah E (2002). "Characterization of the human alpha-synuclein gene: Genomic structure, transcription start site, promoter region and polymorphisms: Erratum p489 Fig 3". J. Alzheimers Dis. 4 (4): 337. Archived from the original on 2016-05-14. Retrieved 2009-02-19.
  16. ^ Jakes R, Spillantini MG, Goedert M (May 1994). "Identification of two distinct synucleins from human brain". FEBS Letters. 345 (1): 27–32. doi: 10.1016/0014-5793(94)00395-5. PMID  8194594. S2CID  36840279.
  17. ^ a b Iwai A, Masliah E, Yoshimoto M, Ge N, Flanagan L, de Silva HA, et al. (February 1995). "The precursor protein of non-A beta component of Alzheimer's disease amyloid is a presynaptic protein of the central nervous system". Neuron. 14 (2): 467–475. doi: 10.1016/0896-6273(95)90302-X. PMID  7857654. S2CID  17941420.
  18. ^ Filippini A, Gennarelli M, Russo I (March 2019). "α-Synuclein and Glia in Parkinson's Disease: A Beneficial or a Detrimental Duet for the Endo-Lysosomal System?". Cellular and Molecular Neurobiology. 39 (2): 161–168. doi: 10.1007/s10571-019-00649-9. PMID  30637614. S2CID  58006790.
  19. ^ Hoek KS, Schlegel NC, Eichhoff OM, Widmer DS, Praetorius C, Einarsson SO, et al. (December 2008). "Novel MITF targets identified using a two-step DNA microarray strategy". Pigment Cell & Melanoma Research. 21 (6): 665–676. doi: 10.1111/j.1755-148X.2008.00505.x. PMID  19067971. S2CID  24698373.
  20. ^ Yu S, Li X, Liu G, Han J, Zhang C, Li Y, et al. (March 2007). "Extensive nuclear localization of alpha-synuclein in normal rat brain neurons revealed by a novel monoclonal antibody". Neuroscience. 145 (2): 539–555. doi: 10.1016/j.neuroscience.2006.12.028. PMID  17275196. S2CID  37294944.
  21. ^ McLean PJ, Kawamata H, Ribich S, Hyman BT (March 2000). "Membrane association and protein conformation of alpha-synuclein in intact neurons. Effect of Parkinson's disease-linked mutations". The Journal of Biological Chemistry. 275 (12): 8812–8816. doi: 10.1074/jbc.275.12.8812. PMID  10722726.
  22. ^ Lee HJ, Choi C, Lee SJ (January 2002). "Membrane-bound alpha-synuclein has a high aggregation propensity and the ability to seed the aggregation of the cytosolic form". The Journal of Biological Chemistry. 277 (1): 671–678. doi: 10.1074/jbc.M107045200. PMID  11679584. S2CID  10438997.
  23. ^ Zhang L, Zhang C, Zhu Y, Cai Q, Chan P, Uéda K, et al. (December 2008). "Semi-quantitative analysis of alpha-synuclein in subcellular pools of rat brain neurons: an immunogold electron microscopic study using a C-terminal specific monoclonal antibody". Brain Research. 1244: 40–52. doi: 10.1016/j.brainres.2008.08.067. PMID  18817762. S2CID  1737088.
  24. ^ a b Liu G, Zhang C, Yin J, Li X, Cheng F, Li Y, et al. (May 2009). "alpha-Synuclein is differentially expressed in mitochondria from different rat brain regions and dose-dependently down-regulates complex I activity". Neuroscience Letters. 454 (3): 187–192. doi: 10.1016/j.neulet.2009.02.056. PMID  19429081. S2CID  45120745.
  25. ^ a b Beyer K (September 2006). "Alpha-synuclein structure, posttranslational modification and alternative splicing as aggregation enhancers". Acta Neuropathologica. 112 (3): 237–251. doi: 10.1007/s00401-006-0104-6. PMID  16845533. S2CID  1367846.
  26. ^ Uéda K, Saitoh T, Mori H (December 1994). "Tissue-dependent alternative splicing of mRNA for NACP, the precursor of non-A beta component of Alzheimer's disease amyloid". Biochemical and Biophysical Research Communications. 205 (2): 1366–1372. doi: 10.1006/bbrc.1994.2816. PMID  7802671.
  27. ^ a b c d Schaeffer E, Kluge A, Böttner M, Zunke F, Cossais F, Berg D, Arnold P (2020). "Alpha Synuclein Connects the Gut-Brain Axis in Parkinson's Disease Patients - A View on Clinical Aspects, Cellular Pathology and Analytical Methodology". Frontiers in Cell and Developmental Biology. 8: 573696. doi: 10.3389/fcell.2020.573696. PMC  7509446. PMID  33015066.
  28. ^ Anis E, Xie A, Brundin L, Brundin P (February 2022). "Digesting recent findings: gut alpha-synuclein, microbiome changes in Parkinson's disease". Trends in Endocrinology and Metabolism. 33 (2): 147–157. doi: 10.1016/j.tem.2021.11.005. PMID  34949514. S2CID  245351514.
  29. ^ a b c Sampson TR, Challis C, Jain N, Moiseyenko A, Ladinsky MS, Shastri GG, et al. (February 2020). Chiu IM, Garrett WS, Desjardins M (eds.). "A gut bacterial amyloid promotes α-synuclein aggregation and motor impairment in mice". eLife. 9: e53111. doi: 10.7554/eLife.53111. PMC  7012599. PMID  32043464.
  30. ^ Barrenschee M, Zorenkov D, Böttner M, Lange C, Cossais F, Scharf AB, et al. (January 2017). "Distinct pattern of enteric phospho-alpha-synuclein aggregates and gene expression profiles in patients with Parkinson's disease". Acta Neuropathologica Communications. 5 (1): 1. doi: 10.1186/s40478-016-0408-2. PMC  5217296. PMID  28057070.
  31. ^ Borghammer P, Van Den Berge N (2019-10-30). "Brain-First versus Gut-First Parkinson's Disease: A Hypothesis". Journal of Parkinson's Disease. 9 (s2): S281–S295. doi: 10.3233/jpd-191721. PMC  6839496. PMID  31498132.
  32. ^ van Rooijen BD, van Leijenhorst-Groener KA, Claessens MM, Subramaniam V (December 2009). "Tryptophan fluorescence reveals structural features of alpha-synuclein oligomers" (PDF). Journal of Molecular Biology. 394 (5): 826–833. doi: 10.1016/j.jmb.2009.10.021. PMID  19837084. S2CID  36085937.
  33. ^ Weinreb PH, Zhen W, Poon AW, Conway KA, Lansbury PT (October 1996). "NACP, a protein implicated in Alzheimer's disease and learning, is natively unfolded". Biochemistry. 35 (43): 13709–13715. doi: 10.1021/bi961799n. PMID  8901511.
  34. ^ Neupane K, Solanki A, Sosova I, Belov M, Woodside MT (January 2014). "Diverse metastable structures formed by small oligomers of α-synuclein probed by force spectroscopy". PLOS ONE. 9 (1): e86495. Bibcode: 2014PLoSO...986495N. doi: 10.1371/journal.pone.0086495. PMC  3901707. PMID  24475132.
  35. ^ George JM, Jin H, Woods WS, Clayton DF (August 1995). "Characterization of a novel protein regulated during the critical period for song learning in the zebra finch". Neuron. 15 (2): 361–372. doi: 10.1016/0896-6273(95)90040-3. PMID  7646890. S2CID  11421888.
  36. ^ Alim MA, Hossain MS, Arima K, Takeda K, Izumiyama Y, Nakamura M, et al. (January 2002). "Tubulin seeds alpha-synuclein fibril formation". The Journal of Biological Chemistry. 277 (3): 2112–2117. doi: 10.1074/jbc.M102981200. PMID  11698390. S2CID  84374030.
  37. ^ Alim MA, Ma QL, Takeda K, Aizawa T, Matsubara M, Nakamura M, et al. (August 2004). "Demonstration of a role for alpha-synuclein as a functional microtubule-associated protein". Journal of Alzheimer's Disease. 6 (4): 435–42, discussion 443–9. doi: 10.3233/JAD-2004-6412. PMID  15345814.
  38. ^ Bonini NM, Giasson BI (November 2005). "Snaring the function of alpha-synuclein". Cell. 123 (3): 359–361. doi: 10.1016/j.cell.2005.10.017. PMID  16269324. S2CID  18772904.
  39. ^ Chandra S, Gallardo G, Fernández-Chacón R, Schlüter OM, Südhof TC (November 2005). "Alpha-synuclein cooperates with CSPalpha in preventing neurodegeneration". Cell. 123 (3): 383–396. doi: 10.1016/j.cell.2005.09.028. PMID  16269331. S2CID  18173864.
  40. ^ a b c Burré J, Sharma M, Tsetsenis T, Buchman V, Etherton MR, Südhof TC (September 2010). "Alpha-synuclein promotes SNARE-complex assembly in vivo and in vitro". Science. 329 (5999): 1663–1667. Bibcode: 2010Sci...329.1663B. doi: 10.1126/science.1195227. PMC  3235365. PMID  20798282.
  41. ^ Cooper AA, Gitler AD, Cashikar A, Haynes CM, Hill KJ, Bhullar B, et al. (July 2006). "Alpha-synuclein blocks ER-Golgi traffic and Rab1 rescues neuron loss in Parkinson's models". Science. 313 (5785): 324–328. Bibcode: 2006Sci...313..324C. doi: 10.1126/science.1129462. PMC  1983366. PMID  16794039.
  42. ^ Kokhan VS, Afanasyeva MA, Van'kin GI (May 2012). "α-Synuclein knockout mice have cognitive impairments". Behavioural Brain Research. 231 (1): 226–230. doi: 10.1016/j.bbr.2012.03.026. PMID  22469626. S2CID  205884600.
  43. ^ Tauro M (4 February 2019). "Alpha-Synuclein Toxicity is Caused by Mitochondrial Dysfunction". Electronic Thesis and Dissertation Repository.
  44. ^ Willingham S, Outeiro TF, DeVit MJ, Lindquist SL, Muchowski PJ (December 2003). "Yeast genes that enhance the toxicity of a mutant huntingtin fragment or alpha-synuclein". Science. 302 (5651): 1769–1772. Bibcode: 2003Sci...302.1769W. doi: 10.1126/science.1090389. PMID  14657499. S2CID  43221047.
  45. ^ a b Uversky VN (October 2007). "Neuropathology, biochemistry, and biophysics of alpha-synuclein aggregation". Journal of Neurochemistry. 103 (1): 17–37. doi: 10.1111/j.1471-4159.2007.04764.x. PMID  17623039. S2CID  85334400.
  46. ^ Jao CC, Hegde BG, Chen J, Haworth IS, Langen R (December 2008). "Structure of membrane-bound alpha-synuclein from site-directed spin labeling and computational refinement". Proceedings of the National Academy of Sciences of the United States of America. 105 (50): 19666–19671. Bibcode: 2008PNAS..10519666J. doi: 10.1073/pnas.0807826105. PMC  2605001. PMID  19066219.
  47. ^ Zhu M, Li J, Fink AL (October 2003). "The association of alpha-synuclein with membranes affects bilayer structure, stability, and fibril formation". The Journal of Biological Chemistry. 278 (41): 40186–40197. doi: 10.1074/jbc.M305326200. PMID  12885775. S2CID  41555488.
  48. ^ Madine J, Doig AJ, Middleton DA (May 2006). "A study of the regional effects of alpha-synuclein on the organization and stability of phospholipid bilayers". Biochemistry. 45 (18): 5783–5792. doi: 10.1021/bi052151q. PMID  16669622.
  49. ^ Varkey J, Isas JM, Mizuno N, Jensen MB, Bhatia VK, Jao CC, et al. (October 2010). "Membrane curvature induction and tubulation are common features of synucleins and apolipoproteins". The Journal of Biological Chemistry. 285 (42): 32486–32493. doi: 10.1074/jbc.M110.139576. PMC  2952250. PMID  20693280.
  50. ^ Mizuno N, Varkey J, Kegulian NC, Hegde BG, Cheng N, Langen R, Steven AC (August 2012). "Remodeling of lipid vesicles into cylindrical micelles by α-synuclein in an extended α-helical conformation". The Journal of Biological Chemistry. 287 (35): 29301–29311. doi: 10.1074/jbc.M112.365817. PMC  3436199. PMID  22767608.
  51. ^ Varkey J, Mizuno N, Hegde BG, Cheng N, Steven AC, Langen R (June 2013). "α-Synuclein oligomers with broken helical conformation form lipoprotein nanoparticles". The Journal of Biological Chemistry. 288 (24): 17620–17630. doi: 10.1074/jbc.M113.476697. PMC  3682563. PMID  23609437.
  52. ^ a b Varkey J, Langen R (July 2017). "Membrane remodeling by amyloidogenic and non-amyloidogenic proteins studied by EPR". Journal of Magnetic Resonance. 280: 127–139. Bibcode: 2017JMagR.280..127V. doi: 10.1016/j.jmr.2017.02.014. PMC  5461824. PMID  28579098.
  53. ^ Zhu M, Qin ZJ, Hu D, Munishkina LA, Fink AL (July 2006). "Alpha-synuclein can function as an antioxidant preventing oxidation of unsaturated lipid in vesicles". Biochemistry. 45 (26): 8135–8142. doi: 10.1021/bi052584t. PMID  16800638.
  54. ^ a b Rawat A, Langen R, Varkey J (September 2018). "Membranes as modulators of amyloid protein misfolding and target of toxicity". Biochimica et Biophysica Acta (BBA) - Biomembranes. 1860 (9): 1863–1875. doi: 10.1016/j.bbamem.2018.04.011. PMC  6203680. PMID  29702073.
  55. ^ Flagmeier P, De S, Wirthensohn DC, Lee SF, Vincke C, Muyldermans S, et al. (June 2017). "Ultrasensitive Measurement of Ca2+ Influx into Lipid Vesicles Induced by Protein Aggregates". Angewandte Chemie. 56 (27): 7750–7754. doi: 10.1002/anie.201700966. PMC  5615231. PMID  28474754.
  56. ^ Sharon R, Bar-Joseph I, Frosch MP, Walsh DM, Hamilton JA, Selkoe DJ (February 2003). "The formation of highly soluble oligomers of alpha-synuclein is regulated by fatty acids and enhanced in Parkinson's disease". Neuron. 37 (4): 583–595. doi: 10.1016/s0896-6273(03)00024-2. PMID  12597857. S2CID  1604719.
  57. ^ Amer DA, Irvine GB, El-Agnaf OM (August 2006). "Inhibitors of alpha-synuclein oligomerization and toxicity: a future therapeutic strategy for Parkinson's disease and related disorders". Experimental Brain Research. 173 (2): 223–233. doi: 10.1007/s00221-006-0539-y. PMID  16733698. S2CID  24760126.
  58. ^ Ruipérez V, Darios F, Davletov B (October 2010). "Alpha-synuclein, lipids and Parkinson's disease". Progress in Lipid Research. 49 (4): 420–428. doi: 10.1016/j.plipres.2010.05.004. PMID  20580911.
  59. ^ Angelova PR, Horrocks MH, Klenerman D, Gandhi S, Abramov AY, Shchepinov MS (May 2015). "Lipid peroxidation is essential for α-synuclein-induced cell death". Journal of Neurochemistry. 133 (4): 582–589. doi: 10.1111/jnc.13024. PMC  4471127. PMID  25580849.
  60. ^ Larsen KE, Schmitz Y, Troyer MD, Mosharov E, Dietrich P, Quazi AZ, et al. (November 2006). "Alpha-synuclein overexpression in PC12 and chromaffin cells impairs catecholamine release by interfering with a late step in exocytosis". The Journal of Neuroscience. 26 (46): 11915–11922. doi: 10.1523/JNEUROSCI.3821-06.2006. PMC  6674868. PMID  17108165.
  61. ^ Nemani VM, Lu W, Berge V, Nakamura K, Onoa B, Lee MK, et al. (January 2010). "Increased expression of alpha-synuclein reduces neurotransmitter release by inhibiting synaptic vesicle reclustering after endocytosis". Neuron. 65 (1): 66–79. doi: 10.1016/j.neuron.2009.12.023. PMC  3119527. PMID  20152114.
  62. ^ Scott DA, Tabarean I, Tang Y, Cartier A, Masliah E, Roy S (June 2010). "A pathologic cascade leading to synaptic dysfunction in alpha-synuclein-induced neurodegeneration". The Journal of Neuroscience. 30 (24): 8083–8095. doi: 10.1523/JNEUROSCI.1091-10.2010. PMC  2901533. PMID  20554859.
  63. ^ Scott D, Roy S (July 2012). "α-Synuclein inhibits intersynaptic vesicle mobility and maintains recycling-pool homeostasis". The Journal of Neuroscience. 32 (30): 10129–10135. doi: 10.1523/JNEUROSCI.0535-12.2012. PMC  3426499. PMID  22836248.
  64. ^ Vargas KJ, Makani S, Davis T, Westphal CH, Castillo PE, Chandra SS (July 2014). "Synucleins regulate the kinetics of synaptic vesicle endocytosis". The Journal of Neuroscience. 34 (28): 9364–9376. doi: 10.1523/JNEUROSCI.4787-13.2014. PMC  4087213. PMID  25009269.
  65. ^ Wang L, Das U, Scott DA, Tang Y, McLean PJ, Roy S (October 2014). "α-synuclein multimers cluster synaptic vesicles and attenuate recycling". Current Biology. 24 (19): 2319–2326. Bibcode: 2014CBio...24.2319W. doi: 10.1016/j.cub.2014.08.027. PMC  4190006. PMID  25264250.
  66. ^ Burré J, Sharma M, Südhof TC (March 2018). "Cell Biology and Pathophysiology of α-Synuclein". Cold Spring Harbor Perspectives in Medicine. 8 (3): a024091. doi: 10.1101/cshperspect.a024091. PMC  5519445. PMID  28108534.
  67. ^ Burré J, Sharma M, Südhof TC (October 2012). "Systematic mutagenesis of α-synuclein reveals distinct sequence requirements for physiological and pathological activities". The Journal of Neuroscience. 32 (43): 15227–15242. doi: 10.1523/JNEUROSCI.3545-12.2012. PMC  3506191. PMID  23100443.
  68. ^ Burré J, Sharma M, Südhof TC (October 2014). "α-Synuclein assembles into higher-order multimers upon membrane binding to promote SNARE complex formation". Proceedings of the National Academy of Sciences of the United States of America. 111 (40): E4274–E4283. Bibcode: 2014PNAS..111E4274B. doi: 10.1073/pnas.1416598111. PMC  4210039. PMID  25246573.
  69. ^ Diao J, Burré J, Vivona S, Cipriano DJ, Sharma M, Kyoung M, et al. (April 2013). "Native α-synuclein induces clustering of synaptic-vesicle mimics via binding to phospholipids and synaptobrevin-2/VAMP2". eLife. 2: e00592. doi: 10.7554/eLife.00592. PMC  3639508. PMID  23638301.
  70. ^ a b Schaser AJ, Osterberg VR, Dent SE, Stackhouse TL, Wakeham CM, Boutros SW, et al. (July 2019). "Alpha-synuclein is a DNA binding protein that modulates DNA repair with implications for Lewy body disorders". Scientific Reports. 9 (1): 10919. Bibcode: 2019NatSR...910919S. doi: 10.1038/s41598-019-47227-z. PMC  6662836. PMID  31358782.
  71. ^ Ryskalin L, Busceti CL, Limanaqi F, Biagioni F, Gambardella S, Fornai F (2018). "A Focus on the Beneficial Effects of Alpha Synuclein and a Re-Appraisal of Synucleinopathies". Current Protein & Peptide Science. 19 (6): 598–611. doi: 10.2174/1389203718666171117110028. PMC  5925871. PMID  29150919.
  72. ^ Micheli L, Creanza TM, Ceccarelli M, D'Andrea G, Giacovazzo G, Ancona N, et al. (2021). "Transcriptome Analysis in a Mouse Model of Premature Aging of Dentate Gyrus: Rescue of Alpha-Synuclein Deficit by Virus-Driven Expression or by Running Restores the Defective Neurogenesis". Frontiers in Cell and Developmental Biology. 9: 696684. doi: 10.3389/fcell.2021.696684. PMC  8415876. PMID  34485283.
  73. ^ Perez-Villalba A, Sirerol-Piquer MS, Belenguer G, Soriano-Cantón R, Muñoz-Manchado AB, Villadiego J, et al. (January 2018). "Synaptic Regulator α-Synuclein in Dopaminergic Fibers Is Essentially Required for the Maintenance of Subependymal Neural Stem Cells". The Journal of Neuroscience. 38 (4): 814–825. doi: 10.1523/JNEUROSCI.2276-17.2017. PMC  6596232. PMID  29217686.
  74. ^ Clayton DF, George JM (June 1998). "The synucleins: a family of proteins involved in synaptic function, plasticity, neurodegeneration and disease". Trends in Neurosciences. 21 (6): 249–254. doi: 10.1016/S0166-2236(97)01213-7. PMID  9641537. S2CID  20654921.
  75. ^ Bussell R, Eliezer D (June 2003). "A structural and functional role for 11-mer repeats in alpha-synuclein and other exchangeable lipid binding proteins". Journal of Molecular Biology. 329 (4): 763–778. doi: 10.1016/S0022-2836(03)00520-5. PMID  12787676.
  76. ^ Uchihara T, Giasson BI (January 2016). "Propagation of alpha-synuclein pathology: hypotheses, discoveries, and yet unresolved questions from experimental and human brain studies". Acta Neuropathologica. 131 (1): 49–73. doi: 10.1007/s00401-015-1485-1. PMC  4698305. PMID  26446103.
  77. ^ Sorrentino ZA, Xia Y, Gorion KM, Hass E, Giasson BI (April 2020). "Carboxy-terminal truncations of mouse α-synuclein alter aggregation and prion-like seeding". FEBS Letters. 594 (8): 1271–1283. doi: 10.1002/1873-3468.13728. PMC  7188589. PMID  31912891.
  78. ^ Vlad C, Lindner K, Karreman C, Schildknecht S, Leist M, Tomczyk N, et al. (December 2011). "Autoproteolytic fragments are intermediates in the oligomerization/aggregation of the Parkinson's disease protein alpha-synuclein as revealed by ion mobility mass spectrometry". ChemBioChem. 12 (18): 2740–2744. doi: 10.1002/cbic.201100569. PMC  3461308. PMID  22162214.
  79. ^ Chiti F, Dobson CM (June 2017). "Protein Misfolding, Amyloid Formation, and Human Disease: A Summary of Progress Over the Last Decade". Annual Review of Biochemistry. 86: 27–68. doi: 10.1146/annurev-biochem-061516-045115. hdl: 2158/1117236. PMID  28498720.
  80. ^ a b c Ke PC, Zhou R, Serpell LC, Riek R, Knowles TP, Lashuel HA, et al. (August 2020). "Half a century of amyloids: past, present and future". Chemical Society Reviews. 49 (15): 5473–5509. doi: 10.1039/c9cs00199a. PMC  7445747. PMID  32632432.
  81. ^ Furukawa K, Aguirre C, So M, Sasahara K, Miyanoiri Y, Sakurai K, et al. (2020). "Isoelectric point-amyloid formation of α-synuclein extends the generality of the solubility and supersaturation-limited mechanism". Current Research in Structural Biology. 2: 35–44. doi: 10.1016/j.crstbi.2020.03.001. PMC  8244297. PMID  34235468.
  82. ^ Theillet FX, Binolfi A, Frembgen-Kesner T, Hingorani K, Sarkar M, Kyne C, et al. (July 2014). "Physicochemical properties of cells and their effects on intrinsically disordered proteins (IDPs)". Chemical Reviews. 114 (13): 6661–6714. doi: 10.1021/cr400695p. PMC  4095937. PMID  24901537.
  83. ^ Eisenberg D, Jucker M (March 2012). "The amyloid state of proteins in human diseases". Cell. 148 (6): 1188–1203. doi: 10.1016/j.cell.2012.02.022. PMC  3353745. PMID  22424229.
  84. ^ Bartels T, Choi JG, Selkoe DJ (August 2011). "α-Synuclein occurs physiologically as a helically folded tetramer that resists aggregation". Nature. 477 (7362): 107–110. Bibcode: 2011Natur.477..107B. doi: 10.1038/nature10324. PMC  3166366. PMID  21841800.
  85. ^ Wang W, Perovic I, Chittuluru J, Kaganovich A, Nguyen LT, Liao J, et al. (October 2011). "A soluble α-synuclein construct forms a dynamic tetramer". Proceedings of the National Academy of Sciences of the United States of America. 108 (43): 17797–17802. Bibcode: 2011PNAS..10817797W. doi: 10.1073/pnas.1113260108. PMC  3203798. PMID  22006323.
  86. ^ Dettmer U, Newman AJ, Luth ES, Bartels T, Selkoe D (March 2013). "In vivo cross-linking reveals principally oligomeric forms of α-synuclein and β-synuclein in neurons and non-neural cells". The Journal of Biological Chemistry. 288 (9): 6371–6385. doi: 10.1074/jbc.M112.403311. PMC  3585072. PMID  23319586.
  87. ^ Westphal CH, Chandra SS (January 2013). "Monomeric synucleins generate membrane curvature". The Journal of Biological Chemistry. 288 (3): 1829–1840. doi: 10.1074/jbc.M112.418871. PMC  3548493. PMID  23184946.
  88. ^ Trexler AJ, Rhoades E (May 2012). "N-Terminal acetylation is critical for forming α-helical oligomer of α-synuclein". Protein Science. 21 (5): 601–605. doi: 10.1002/pro.2056. PMC  3403458. PMID  22407793.
  89. ^ Binolfi A, Theillet FX, Selenko P (October 2012). "Bacterial in-cell NMR of human α-synuclein: a disordered monomer by nature?". Biochemical Society Transactions. 40 (5): 950–954. doi: 10.1042/BST20120096. PMID  22988846.
  90. ^ Bertini I, Felli IC, Gonnelli L, Vasantha Kumar MV, Pierattelli R (October 2011). "High-resolution characterization of intrinsic disorder in proteins: expanding the suite of (13)C-detected NMR spectroscopy experiments to determine key observables". ChemBioChem. 12 (15): 2347–2352. doi: 10.1002/cbic.201100406. PMID  23106082. S2CID  34960247.
  91. ^ Waudby CA, Camilloni C, Fitzpatrick AW, Cabrita LD, Dobson CM, Vendruscolo M, Christodoulou J (26 August 2013). "In-cell NMR characterization of the secondary structure populations of a disordered conformation of α-synuclein within E. coli cells". PLOS ONE. 8 (8): e72286. Bibcode: 2013PLoSO...872286W. doi: 10.1371/journal.pone.0072286. PMC  3753296. PMID  23991082.
  92. ^ Li C, Liu M (April 2013). "Protein dynamics in living cells studied by in-cell NMR spectroscopy". FEBS Letters. 587 (8): 1008–1011. doi: 10.1016/j.febslet.2012.12.023. PMID  23318712. S2CID  2649589.
  93. ^ a b Fauvet B, Mbefo MK, Fares MB, Desobry C, Michael S, Ardah MT, et al. (May 2012). "α-Synuclein in central nervous system and from erythrocytes, mammalian cells, and Escherichia coli exists predominantly as disordered monomer". The Journal of Biological Chemistry. 287 (19): 15345–15364. doi: 10.1074/jbc.M111.318949. PMC  3346117. PMID  22315227.
  94. ^ Pérez AC, Subrini O, Hessel A, Ladant D, Chenal A (January 2014). "Molecular Crowding Stabilizes Both the Intrinsically Disordered Calcium-Free State and the Folded Calcium-Bound State of an RTX Protein: Implication for Toxin Secretion". Biophysical Journal. 106 (2): 271a. Bibcode: 2014BpJ...106R.271S. doi: 10.1016/j.bpj.2013.11.1589.
  95. ^ Waudby CA, Mantle MD, Cabrita LD, Gladden LF, Dobson CM, Christodoulou J (July 2012). "Rapid distinction of intracellular and extracellular proteins using NMR diffusion measurements". Journal of the American Chemical Society. 134 (28): 11312–11315. doi: 10.1021/ja304912c. PMID  22694283.
  96. ^ Croke RL, Sallum CO, Watson E, Watt ED, Alexandrescu AT (August 2008). "Hydrogen exchange of monomeric alpha-synuclein shows unfolded structure persists at physiological temperature and is independent of molecular crowding in Escherichia coli". Protein Science. 17 (8): 1434–1445. doi: 10.1110/ps.033803.107. PMC  2492816. PMID  18493022.
  97. ^ Burré J, Vivona S, Diao J, Sharma M, Brunger AT, Südhof TC (June 2013). "Properties of native brain α-synuclein". Nature. 498 (7453): E4–6, discussion E6–7. Bibcode: 2013Natur.498E...4B. doi: 10.1038/nature12125. PMC  4255827. PMID  23765500.
  98. ^ Theillet FX, Binolfi A, Bekei B, Martorana A, Rose HM, Stuiver M, et al. (February 2016). "Structural disorder of monomeric α-synuclein persists in mammalian cells". Nature. 530 (7588): 45–50. Bibcode: 2016Natur.530...45T. doi: 10.1038/nature16531. hdl: 11336/53199. PMID  26808899. S2CID  4461465.
  99. ^ Spillantini MG, Schmidt ML, Lee VM, Trojanowski JQ, Jakes R, Goedert M (August 1997). "Alpha-synuclein in Lewy bodies". Nature. 388 (6645): 839–840. Bibcode: 1997Natur.388..839G. doi: 10.1038/42166. PMID  9278044. S2CID  4419837.
  100. ^ Mezey E, Dehejia A, Harta G, Papp MI, Polymeropoulos MH, Brownstein MJ (July 1998). "Alpha synuclein in neurodegenerative disorders: murderer or accomplice?". Nature Medicine. 4 (7): 755–757. doi: 10.1038/nm0798-755. PMID  9662355. S2CID  46196799.
  101. ^ Marvian AT, Koss DJ, Aliakbari F, Morshedi D, Outeiro TF (September 2019). "In vitro models of synucleinopathies: informing on molecular mechanisms and protective strategies". Journal of Neurochemistry. 150 (5): 535–565. doi: 10.1111/jnc.14707. PMID  31004503. S2CID  125080534.
  102. ^ Arima K, Hirai S, Sunohara N, Aoto K, Izumiyama Y, Uéda K, et al. (October 1999). "Cellular co-localization of phosphorylated tau- and NACP/alpha-synuclein-epitopes in lewy bodies in sporadic Parkinson's disease and in dementia with Lewy bodies". Brain Research. 843 (1–2): 53–61. doi: 10.1016/S0006-8993(99)01848-X. PMID  10528110. S2CID  11144367.
  103. ^ Arima K, Mizutani T, Alim MA, Tonozuka-Uehara H, Izumiyama Y, Hirai S, Uéda K (August 2000). "NACP/alpha-synuclein and tau constitute two distinctive subsets of filaments in the same neuronal inclusions in brains from a family of parkinsonism and dementia with Lewy bodies: double-immunolabeling fluorescence and electron microscopic studies". Acta Neuropathologica. 100 (2): 115–121. doi: 10.1007/s004010050002. PMID  10963357. S2CID  22950302.
  104. ^ Yokota O, Terada S, Ishizu H, Ujike H, Ishihara T, Nakashima H, et al. (December 2002). "NACP/alpha-synuclein, NAC, and beta-amyloid pathology of familial Alzheimer's disease with the E184D presenilin-1 mutation: a clinicopathological study of two autopsy cases". Acta Neuropathologica. 104 (6): 637–648. doi: 10.1007/s00401-002-0596-7. PMID  12410385. S2CID  42542929.
  105. ^ Kim HY, Heise H, Fernandez CO, Baldus M, Zweckstetter M (September 2007). "Correlation of amyloid fibril beta-structure with the unfolded state of alpha-synuclein". ChemBioChem. 8 (14): 1671–1674. doi: 10.1002/cbic.200700366. PMID  17722123. S2CID  41870508.
  106. ^ Sandal M, Valle F, Tessari I, Mammi S, Bergantino E, Musiani F, et al. (January 2008). "Conformational equilibria in monomeric alpha-synuclein at the single-molecule level". PLOS Biology. 6 (1): e6. doi: 10.1371/journal.pbio.0060006. PMC  2174973. PMID  18198943.
  107. ^ Schulz-Schaeffer WJ (August 2010). "The synaptic pathology of alpha-synuclein aggregation in dementia with Lewy bodies, Parkinson's disease and Parkinson's disease dementia". Acta Neuropathologica. 120 (2): 131–143. doi: 10.1007/s00401-010-0711-0. PMC  2892607. PMID  20563819.
  108. ^ Morshedi D, Aliakbari F (Spring 2012). "The Inhibitory Effects of Cuminaldehyde on Amyloid Fibrillation and Cytotoxicity of Alpha-synuclein". Modares Journal of Medical Sciences: Pathobiology. 15 (1): 45–60.
  109. ^ Woulfe J, Hoogendoorn H, Tarnopolsky M, Muñoz DG (November 2000). "Monoclonal antibodies against Epstein-Barr virus cross-react with alpha-synuclein in human brain". Neurology. 55 (9): 1398–1401. doi: 10.1212/WNL.55.9.1398. PMID  11087792. S2CID  84387269.
  110. ^ Polymeropoulos MH, Lavedan C, Leroy E, Ide SE, Dehejia A, Dutra A, et al. (June 1997). "Mutation in the alpha-synuclein gene identified in families with Parkinson's disease". Science. 276 (5321): 2045–2047. doi: 10.1126/science.276.5321.2045. PMID  9197268.
  111. ^ Krüger R, Kuhn W, Müller T, Woitalla D, Graeber M, Kösel S, et al. (February 1998). "Ala30Pro mutation in the gene encoding alpha-synuclein in Parkinson's disease". Nature Genetics. 18 (2): 106–108. doi: 10.1038/ng0298-106. PMID  9462735. S2CID  40777043.
  112. ^ Zarranz JJ, Alegre J, Gómez-Esteban JC, Lezcano E, Ros R, Ampuero I, et al. (February 2004). "The new mutation, E46K, of alpha-synuclein causes Parkinson and Lewy body dementia". Annals of Neurology. 55 (2): 164–173. doi: 10.1002/ana.10795. PMID  14755719. S2CID  55263.
  113. ^ Appel-Cresswell S, Vilarino-Guell C, Encarnacion M, Sherman H, Yu I, Shah B, et al. (June 2013). "Alpha-synuclein p.H50Q, a novel pathogenic mutation for Parkinson's disease". Movement Disorders. 28 (6): 811–813. doi: 10.1002/mds.25421. PMID  23457019. S2CID  13508258.
  114. ^ Lesage S, Anheim M, Letournel F, Bousset L, Honoré A, Rozas N, et al. (April 2013). "G51D α-synuclein mutation causes a novel parkinsonian-pyramidal syndrome". Annals of Neurology. 73 (4): 459–471. doi: 10.1002/ana.23894. PMID  23526723. S2CID  43305127.
  115. ^ Fevga C, Park Y, Lohmann E, Kievit AJ, Breedveld GJ, Ferraro F, et al. (August 2021). "A new alpha-synuclein missense variant (Thr72Met) in two Turkish families with Parkinson's disease". Parkinsonism & Related Disorders. 89: 63–72. doi: 10.1016/j.parkreldis.2021.06.023. PMC  8607441. PMID  34229155.
  116. ^ Giasson BI, Uryu K, Trojanowski JQ, Lee VM (March 1999). "Mutant and wild type human alpha-synucleins assemble into elongated filaments with distinct morphologies in vitro". The Journal of Biological Chemistry. 274 (12): 7619–7622. doi: 10.1074/jbc.274.12.7619. PMID  10075647.
  117. ^ Flagmeier P, Meisl G, Vendruscolo M, Knowles TP, Dobson CM, Buell AK, Galvagnion C (September 2016). "Mutations associated with familial Parkinson's disease alter the initiation and amplification steps of α-synuclein aggregation". Proceedings of the National Academy of Sciences of the United States of America. 113 (37): 10328–10333. Bibcode: 2016PNAS..11310328F. doi: 10.1073/pnas.1604645113. PMC  5027465. PMID  27573854.
  118. ^ Singleton AB, Farrer M, Johnson J, Singleton A, Hague S, Kachergus J, et al. (October 2003). "alpha-Synuclein locus triplication causes Parkinson's disease". Science. 302 (5646): 841. doi: 10.1126/science.1090278. PMID  14593171. S2CID  85938327.
  119. ^ Chartier-Harlin MC, Kachergus J, Roumier C, Mouroux V, Douay X, Lincoln S, et al. (2004). "Alpha-synuclein locus duplication as a cause of familial Parkinson's disease". Lancet. 364 (9440): 1167–1169. doi: 10.1016/S0140-6736(04)17103-1. PMID  15451224. S2CID  54419671.
  120. ^ Eslamboli A, Romero-Ramos M, Burger C, Bjorklund T, Muzyczka N, Mandel RJ, et al. (March 2007). "Long-term consequences of human alpha-synuclein overexpression in the primate ventral midbrain". Brain. 130 (Pt 3): 799–815. doi: 10.1093/brain/awl382. PMID  17303591.
  121. ^ Giasson BI, Forman MS, Higuchi M, Golbe LI, Graves CL, Kotzbauer PT, et al. (April 2003). "Initiation and synergistic fibrillization of tau and alpha-synuclein". Science. 300 (5619): 636–640. Bibcode: 2003Sci...300..636G. doi: 10.1126/science.1082324. PMID  12714745. S2CID  20223000.
  122. ^ Takeda A, Hashimoto M, Mallory M, Sundsumo M, Hansen L, Masliah E (March 2000). "C-terminal alpha-synuclein immunoreactivity in structures other than Lewy bodies in neurodegenerative disorders". Acta Neuropathologica. 99 (3): 296–304. doi: 10.1007/PL00007441. PMID  10663973. S2CID  27393027.
  123. ^ Williams T, Sorrentino Z, Weinrich M, Giasson BI, Chakrabarty P (2020-07-01). "Differential cross-seeding properties of tau and α-synuclein in mouse models of tauopathy and synucleinopathy". Brain Communications. 2 (2): fcaa090. doi: 10.1093/braincomms/fcaa090. PMC  7567170. PMID  33094280.
  124. ^ Prusiner SB, Woerman AL, Mordes DA, Watts JC, Rampersaud R, Berry DB, et al. (September 2015). "Evidence for α-synuclein prions causing multiple system atrophy in humans with parkinsonism". Proceedings of the National Academy of Sciences of the United States of America. 112 (38): E5308–E5317. Bibcode: 2015PNAS..112E5308P. doi: 10.1073/pnas.1514475112. PMC  4586853. PMID  26324905.
  125. ^ Weiler N (31 August 2015). "New Type of Prion May Cause, Transmit Neurodegeneration".
  126. ^ Rettner R (31 August 2015). "Another Fatal Brain Disease May Come from the Spread of 'Prion' Proteins". Wired Science.
  127. ^ Cookson MR (February 2009). "alpha-Synuclein and neuronal cell death". Molecular Neurodegeneration. 4 (1): 9. doi: 10.1186/1750-1326-4-9. PMC  2646729. PMID  19193223.
  128. ^ De Giorgi F, Laferrière F, Zinghirino F, Faggiani E, Lends A, Bertoni M, et al. (October 2020). "Novel self-replicating α-synuclein polymorphs that escape ThT monitoring can spontaneously emerge and acutely spread in neurons". Science Advances. 6 (40): eabc4364. Bibcode: 2020SciA....6.4364D. doi: 10.1126/sciadv.abc4364. PMC  7852382. PMID  33008896.
  129. ^ Fujiwara H, Hasegawa M, Dohmae N, Kawashima A, Masliah E, Goldberg MS, et al. (February 2002). "alpha-Synuclein is phosphorylated in synucleinopathy lesions". Nature Cell Biology. 4 (2): 160–164. doi: 10.1038/ncb748. PMID  11813001. S2CID  40155547.
  130. ^ Wersinger C, Sidhu A (April 2003). "Attenuation of dopamine transporter activity by alpha-synuclein". Neuroscience Letters. 340 (3): 189–192. doi: 10.1016/S0304-3940(03)00097-1. PMID  12672538. S2CID  54381509.
  131. ^ Lee FJ, Liu F, Pristupa ZB, Niznik HB (April 2001). "Direct binding and functional coupling of alpha-synuclein to the dopamine transporters accelerate dopamine-induced apoptosis". FASEB Journal. 15 (6): 916–926. doi: 10.1096/fj.00-0334com. PMID  11292651. S2CID  3406798.
  132. ^ Choi P, Golts N, Snyder H, Chong M, Petrucelli L, Hardy J, et al. (September 2001). "Co-association of parkin and alpha-synuclein". NeuroReport. 12 (13): 2839–2843. doi: 10.1097/00001756-200109170-00017. PMID  11588587. S2CID  83941655.
  133. ^ Kawahara K, Hashimoto M, Bar-On P, Ho GJ, Crews L, Mizuno H, et al. (March 2008). "alpha-Synuclein aggregates interfere with Parkin solubility and distribution: role in the pathogenesis of Parkinson disease". The Journal of Biological Chemistry. 283 (11): 6979–6987. doi: 10.1074/jbc.M710418200. PMID  18195004.
  134. ^ Ahn BH, Rhim H, Kim SY, Sung YM, Lee MY, Choi JY, et al. (April 2002). "alpha-Synuclein interacts with phospholipase D isozymes and inhibits pervanadate-induced phospholipase D activation in human embryonic kidney-293 cells". The Journal of Biological Chemistry. 277 (14): 12334–12342. doi: 10.1074/jbc.M110414200. PMID  11821392. S2CID  85695661.
  135. ^ Neystat M, Rzhetskaya M, Kholodilov N, Burke RE (June 2002). "Analysis of synphilin-1 and synuclein interactions by yeast two-hybrid beta-galactosidase liquid assay". Neuroscience Letters. 325 (2): 119–123. doi: 10.1016/S0304-3940(02)00253-7. PMID  12044636. S2CID  11517781.
  136. ^ Reed JC, Meister L, Tanaka S, Cuddy M, Yum S, Geyer C, Pleasure D (December 1991). "Differential expression of bcl2 protooncogene in neuroblastoma and other human tumor cell lines of neural origin". Cancer Research. 51 (24): 6529–6538. PMID  1742726.
  137. ^ Kawamata H, McLean PJ, Sharma N, Hyman BT (May 2001). "Interaction of alpha-synuclein and synphilin-1: effect of Parkinson's disease-associated mutations". Journal of Neurochemistry. 77 (3): 929–934. doi: 10.1046/j.1471-4159.2001.00301.x. PMID  11331421. S2CID  83885937.
  138. ^ Engelender S, Kaminsky Z, Guo X, Sharp AH, Amaravi RK, Kleiderlein JJ, et al. (May 1999). "Synphilin-1 associates with alpha-synuclein and promotes the formation of cytosolic inclusions". Nature Genetics. 22 (1): 110–114. doi: 10.1038/8820. PMID  10319874. S2CID  2611127.
  139. ^ Lee VM, Giasson BI, Trojanowski JQ (March 2004). "More than just two peas in a pod: common amyloidogenic properties of tau and alpha-synuclein in neurodegenerative diseases". Trends in Neurosciences. 27 (3): 129–134. doi: 10.1016/j.tins.2004.01.007. PMID  15036877. S2CID  9545889.
  140. ^ Jensen PH, Hager H, Nielsen MS, Hojrup P, Gliemann J, Jakes R (September 1999). "alpha-synuclein binds to Tau and stimulates the protein kinase A-catalyzed tau phosphorylation of serine residues 262 and 356". The Journal of Biological Chemistry. 274 (36): 25481–25489. doi: 10.1074/jbc.274.36.25481. PMID  10464279. S2CID  23877061.
  141. ^ Giasson BI, Lee VM, Trojanowski JQ (2003). "Interactions of amyloidogenic proteins". Neuromolecular Medicine. 4 (1–2): 49–58. doi: 10.1385/NMM:4:1-2:49. PMID  14528052. S2CID  9086733.
  142. ^ Ono K, Takahashi R, Ikeda T, Yamada M (September 2012). "Cross-seeding effects of amyloid β-protein and α-synuclein". Journal of Neurochemistry. 122 (5): 883–890. doi: 10.1111/j.1471-4159.2012.07847.x. hdl: 2297/34736. PMID  22734715. S2CID  17593306.

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