This entry was last updated at: June 13, 2016, 11:23 a.m.
Group | [NiFe] Group 3: Cofactor-coupled bidirectional [NiFe] hydrogenases |
Subgroup | [NiFe] Group 3c: Heterodisulfide reductase-linked |
Function | Bifurcates electrons from H2 to heterodisulfide and ferredoxin. This is the final step in the Wolfe cycle of methanogenesis. |
Activity | Electron-bifurcation |
Oxygen tolerance | O2-tolerant? |
Localisation | Cytosolic |
Ecosystem distribution | Methanogenic environments such as anoxic soils, marine sediments, and gastrointestinal tracts |
Taxonomic distribution | Encoded in most methanogens and sulfate-reducing bacteria |
e.g. Methanothermobacter marburgensis (WP_013296307.1):
Structures |
|
Subunits | 4 |
Subunit description | MvhA (hydrogenase large subunit) MvhG (hydrogenase small subunit) MvhD (iron-sulfur subunit) MvhB (polyferredoxin subunit) Forms complex with heterodisulfide reductase (HdrABC) |
Catalytic site | [NiFe]-centre or [NiFeSe]-centre |
FeS clusters | Proximal: 4Cys[4Fe4S] Medial: 4Cys[4Fe4S] Distal: 4Cys[4Fe4S] |
NCBI Accession | Organism | Hydrogenase Class | Phylum | Order | Activity (Predicted) | Oxygen Tolerance (Predicted) | Subunits (Predicted) | Metal Centres (Predicted) | Accessory Subunits (Predicted) |
---|---|---|---|---|---|---|---|---|---|
WP_020448391.1 | Methanomassiliicoccus intestinalis | [NiFe] Group 3c | Euryarchaeota | Methanomicrobiales | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
WP_019177457.1 | Methanomassiliicoccus luminyensis | [NiFe] Group 3c | Euryarchaeota | Methanomicrobiales | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
WP_013330634.1 | Methanoplanus petrolearius | [NiFe] Group 3c | Euryarchaeota | Methanomicrobiales | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
WP_011018550.1 | Methanopyrus kandleri | [NiFe] Group 3c | Euryarchaeota | Methanopyrales | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
WP_011018638.1 | Methanopyrus kandleri | [NiFe] Group 3c | Euryarchaeota | Methanopyrales | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
WP_015504206.1 | Methanomethylophilus alvus | [NiFe] Group 3c | Euryarchaeota | Unclassified | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
WP_012302733.1 | Desulforudis audaxviator | [NiFe] Group 3c | Firmicutes | Clostridiales | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
WP_015617925.1 | Desulfotomaculum gibsoniae | [NiFe] Group 3c | Firmicutes | Clostridiales | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
WP_015739967.1 | Ammonifex degensii | [NiFe] Group 3c | Firmicutes | Thermoanaerobacterales | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
WP_013756665.1 | Thermodesulfobium narugense | [NiFe] Group 3c | Firmicutes | Thermoanaerobacterales | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
WP_013908379.1 | Thermodesulfatator indicus | [NiFe] Group 3c | Firmicutes | Thermodesulfobacteriales | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
WP_012309762.1 | Korarchaeum cryptofilum | [NiFe] Group 3c | Korarchaeota | Unclassified | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
KKK40681.1 | Lokiarchaeum sp. GC14_75 | [NiFe] Group 3c | Lokiarchaeota | N/A | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
WP_012545782.1 | Thermodesulfovibrio yellowstonii | [NiFe] Group 3c | Nitrospirae | Nitrospirales | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
WP_022853555.1 | Thermodesulfatator atlanticus | [NiFe] Group 3c | Thermodesulfobacteria | Thermodesulfobacteriales | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
WP_028840908.1 | Thermodesulfobacterium hveragerdense | [NiFe] Group 3c | Thermodesulfobacteria | Thermodesulfobacteriales | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
WP_012376486.1 | Opitutus terrae | [NiFe] Group 3c | Verrucomicrobia | Opitutales | Bifurcating | Sensitive | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Polyferredoxin, [FeS] protein |
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