This entry was last updated at: Feb. 9, 2018, 7:34 a.m.
Group | [NiFe] Group 3: Cofactor-coupled bidirectional [NiFe] hydrogenases |
Subgroup | [NiFe] Group 3b: NADP-coupled |
Function | Directly couples oxidation of NADPH to fermentative evolution of H2. Reverse reaction may also occur. Some complexes controversially proposed to harbour sulfhydrogenase activity. |
Activity | Bidirectional |
Oxygen tolerance | O2-tolerant |
Localisation | Cytosolic |
Ecosystem distribution | Diverse soil and aquatic environments |
Taxonomic distribution | Encoded in multiple diverse bacterial and archaeal phyla |
e.g. Pyrococcus furiosus (WP_011012029.1):
Structures | |
Subunits | 4 |
Subunit description | HyhL (hydrogenase large subunit) HyhS (hydrogenase small subunit) HyhG (diaphorase catalytic subunit) HyhB (diaphorase electron transfer subunit) |
Catalytic site | [NiFe]-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_018290138.1 | Verrucomicrobium sp. 3C | [NiFe] Group 3b | Verrucomicrobia | Verrucomicrobiales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_048090768.1 | Methanoperedens nitroreducens | [NiFe] Group 3b | Euryarchaeota | Methanosarcinales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_048088262.1 | Methanoperedens nitroreducens | [NiFe] Group 3b | Euryarchaeota | Methanosarcinales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
CUU06124.1 | Kryptonium thompsoni | [NiFe] Group 3b | Kryptonia | N/A | Bidirectional | Tolerant | 4 | [NiFe]-centre, 3 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
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Chemistry: