| RRC ID |
50890
|
| 著者 |
Szeinbaum N, Lin H, Brandes JA, Taillefert M, Glass JB, DiChristina TJ.
|
| タイトル |
Microbial manganese(III) reduction fuelled by anaerobic acetate oxidation.
|
| ジャーナル |
Environ Microbiol
|
| Abstract |
Soluble manganese in the intermediate +III oxidation state (Mn3+ ) is a newly identified oxidant in anoxic environments, whereas acetate is a naturally abundant substrate that fuels microbial activity. Microbial populations coupling anaerobic acetate oxidation to Mn3+ reduction, however, have yet to be identified. We isolated a Shewanella strain capable of oxidizing acetate anaerobically with Mn3+ as the electron acceptor, and confirmed this phenotype in other strains. This metabolic connection between acetate and soluble Mn3+ represents a new biogeochemical link between carbon and manganese cycles. Genomic analyses uncovered four distinct genes that allow for pathway variations in the complete dehydrogenase-driven TCA cycle that could support anaerobic acetate oxidation coupled to metal reduction in Shewanella and other Gammaproteobacteria. An oxygen-tolerant TCA cycle supporting anaerobic manganese reduction is thus a new connection in the manganese-driven carbon cycle, and a new variable for models that use manganese as a proxy to infer oxygenation events on early Earth.
|
| 巻・号 |
19(9)
|
| ページ |
3475-3486
|
| 公開日 |
2017-9-1
|
| DOI |
10.1111/1462-2920.13829
|
| PMID |
28631370
|
| PMC |
PMC6295286
|
| MeSH |
Acetates / metabolism*
Carbon Cycle / genetics
Carbon Cycle / physiology
Citric Acid Cycle / genetics
Citric Acid Cycle / physiology*
Manganese / metabolism*
Oxidation-Reduction
Oxidoreductases / metabolism
Shewanella / genetics
Shewanella / metabolism*
|
| IF |
4.933
|
| 引用数 |
5
|
| リソース情報 |
| 一般微生物 |
JCM 21037 |
