Acidithrix ferrooxidans | |
---|---|
Scientific classification
![]() | |
Domain: | Bacteria |
Phylum: | Actinomycetota |
Class: | Acidimicrobiia |
Order: | Acidimicrobiales |
Family: | incertae sedis |
Genus: |
"Acidithrix" Kay et al. 2013 [1] |
Species: | A. ferrooxidans
|
Binomial name | |
Acidithrix ferrooxidans Kay et al. 2013
[1]
| |
Type strain | |
DSM 28176 JCM 19728 Py-F3 [2] |
Acidithrix ferrooxidans (A. ferrooxidans) is a heterotrophic, acidophilic and Gram-positive bacterium from the genus Acidithrix. The type strain of this species, A. ferrooxidans Py-F3, was isolated from an acidic stream draining from a copper mine in Wales. [1] [3] [4] This species grows in a variety of acidic environments such as streams, mines or geothermal sites. [1] Mine lakes with a redoxcline support growth with ferrous iron as the electron donor. [1] [5] "A. ferrooxidans" grows rapidly in macroscopic streamer, producing greater cell densities than other streamer-forming microbes. [6] Use in a bioreactors to remediate mine waste has been proposed due to cell densities and rapid oxidation of ferrous iron oxidation in acidic mine drainage. [6] Exopolysaccharide production during metal substrate metabolism, such as iron oxidation helps to prevent cell encrustation by minerals. [5]
Type strain Py-F3 was isolated from acidic, metal-rich mine waters in North Wales. [5] Py-3 can grow different metabolisms for potential growth substrates, [4] and can grow at a range of temperatures from 10 to 30 °C and pH from1.5–4.4. [4] Strain Py-F3 encodes multiple enzymes for carbon fixation, including RubisCO, but its carbon fixation activity has not been studied. [4] Genes encoding proteins for metabolic pathways utilizing sulfur, nitrogen, and iron were discovered in the genome. [4] The source of sulfur is sulfate, and it can use amino acids as a nitrogen source. This is unique requirement of isolate Py-F3, leaving it with an inability to grow in media unless complex substrates are added. [4] For pH homeostasis the urease genes could aid survival due to encoded the proton pumping activity. [4] Uptake of urea is documented in Py-F3 and allows for the intracellular production of urea, rather than taking it in to the cell. [4] This organism's peptidoglycan contains meso- diaminopimelic acid and with major fatty acid chains and a respiratory quinone. [4]
Isolate C25 was recovered from particulate iron forming in a pelagic iron-rich redoxcline zone of a mine lake. [5] This isolate can both oxidize Fe(II) and reduce Fe(III) under micro-oxic conditions, and was suggested to contribute to the formation of particulate iron in the pelagic environment. [5] Growth did not occur at pH lower than that of Py-F3 (pH) of 2, while C25 had a higher pH tolerance. [5] The observation that C25 can both oxidize and reduce iron provides insights into how microbes cycle both iron and organic carbon under acidic conditions. [5] Fast rates of iron oxidation lead to the regeneration of ferric iron in the environment at a pH as low as 1.5. [7] [6] Compared to Py-F3, C25 did not encode for the ribulose, but future studies will need to be done for a definitive answer. [5]
The strains grow using iron metabolism on Tryptic Soy Broth/Agar (TSA/TSB) at low pH, where bacterial colonies form with iron precipitates. [5] [6] Lab conditions of 25 °C aerobically allowed for ferrous iron oxidation to occur in sterilized lake medium. [5] Researchers recognized the potential of utilizing "A. ferrooxidans" for a bioreactor through growth/adherence on solid surfaces. [6] Iron mines make an excellent growing condition and analogy for the bioreactor due to those similar surfaces. [6] Utilizing the bacteria can facilitate soluble iron removal from ferruginous water, and the iron (III) production contributes to sulfide minerals dissolving. [6]
{{
cite journal}}
: CS1 maint: DOI inactive as of April 2024 (
link)
Acidithrix ferrooxidans | |
---|---|
Scientific classification
![]() | |
Domain: | Bacteria |
Phylum: | Actinomycetota |
Class: | Acidimicrobiia |
Order: | Acidimicrobiales |
Family: | incertae sedis |
Genus: |
"Acidithrix" Kay et al. 2013 [1] |
Species: | A. ferrooxidans
|
Binomial name | |
Acidithrix ferrooxidans Kay et al. 2013
[1]
| |
Type strain | |
DSM 28176 JCM 19728 Py-F3 [2] |
Acidithrix ferrooxidans (A. ferrooxidans) is a heterotrophic, acidophilic and Gram-positive bacterium from the genus Acidithrix. The type strain of this species, A. ferrooxidans Py-F3, was isolated from an acidic stream draining from a copper mine in Wales. [1] [3] [4] This species grows in a variety of acidic environments such as streams, mines or geothermal sites. [1] Mine lakes with a redoxcline support growth with ferrous iron as the electron donor. [1] [5] "A. ferrooxidans" grows rapidly in macroscopic streamer, producing greater cell densities than other streamer-forming microbes. [6] Use in a bioreactors to remediate mine waste has been proposed due to cell densities and rapid oxidation of ferrous iron oxidation in acidic mine drainage. [6] Exopolysaccharide production during metal substrate metabolism, such as iron oxidation helps to prevent cell encrustation by minerals. [5]
Type strain Py-F3 was isolated from acidic, metal-rich mine waters in North Wales. [5] Py-3 can grow different metabolisms for potential growth substrates, [4] and can grow at a range of temperatures from 10 to 30 °C and pH from1.5–4.4. [4] Strain Py-F3 encodes multiple enzymes for carbon fixation, including RubisCO, but its carbon fixation activity has not been studied. [4] Genes encoding proteins for metabolic pathways utilizing sulfur, nitrogen, and iron were discovered in the genome. [4] The source of sulfur is sulfate, and it can use amino acids as a nitrogen source. This is unique requirement of isolate Py-F3, leaving it with an inability to grow in media unless complex substrates are added. [4] For pH homeostasis the urease genes could aid survival due to encoded the proton pumping activity. [4] Uptake of urea is documented in Py-F3 and allows for the intracellular production of urea, rather than taking it in to the cell. [4] This organism's peptidoglycan contains meso- diaminopimelic acid and with major fatty acid chains and a respiratory quinone. [4]
Isolate C25 was recovered from particulate iron forming in a pelagic iron-rich redoxcline zone of a mine lake. [5] This isolate can both oxidize Fe(II) and reduce Fe(III) under micro-oxic conditions, and was suggested to contribute to the formation of particulate iron in the pelagic environment. [5] Growth did not occur at pH lower than that of Py-F3 (pH) of 2, while C25 had a higher pH tolerance. [5] The observation that C25 can both oxidize and reduce iron provides insights into how microbes cycle both iron and organic carbon under acidic conditions. [5] Fast rates of iron oxidation lead to the regeneration of ferric iron in the environment at a pH as low as 1.5. [7] [6] Compared to Py-F3, C25 did not encode for the ribulose, but future studies will need to be done for a definitive answer. [5]
The strains grow using iron metabolism on Tryptic Soy Broth/Agar (TSA/TSB) at low pH, where bacterial colonies form with iron precipitates. [5] [6] Lab conditions of 25 °C aerobically allowed for ferrous iron oxidation to occur in sterilized lake medium. [5] Researchers recognized the potential of utilizing "A. ferrooxidans" for a bioreactor through growth/adherence on solid surfaces. [6] Iron mines make an excellent growing condition and analogy for the bioreactor due to those similar surfaces. [6] Utilizing the bacteria can facilitate soluble iron removal from ferruginous water, and the iron (III) production contributes to sulfide minerals dissolving. [6]
{{
cite journal}}
: CS1 maint: DOI inactive as of April 2024 (
link)