This entry was last updated at: Feb. 9, 2018, 6:37 a.m.
Group | [NiFe] Group 3: Cofactor-coupled bidirectional [NiFe] hydrogenases |
Subgroup | [NiFe] Group 3d: NAD-coupled |
Function | Generates reductant for hydrogenotrophic carbon-fixation by directly coupling oxidation of H2 to reduction of NAD. Also acts in reverse direction to catalyse fermentative NADH-dependent production of H2. Electrons flow between H2-activating hydrogenase subunits to NAD-activating diaphorase subunits. |
Activity | Bidirectional |
Oxygen tolerance | O2-tolerant |
Localisation | Cytosolic |
Ecosystem distribution | Diverse soil and aquatic environments |
Taxonomic distribution | Encoded in diverse Proteobacteria and Cyanobacteria |
e.g. Ralstonia eutropha (WP_011154013.1):
Structures | |
Subunits | 4 or 5 |
Subunit description | HoxH (hydrogenase large subunit) HoxY (hydrogenase small subunit) HoxF (diaphorase catalytic subunit) HoxU (diaphorase electron transfer subunit) Photosynthetic bacteria also contain HoxE (iron-sulfur subunit) |
Catalytic site | [NiFe]-centre |
FeS clusters | Proximal: 4Cys[4Fe4S] Medial: Absent Distal: Absent |
NCBI Accession | Organism | Hydrogenase Class | Phylum | Order | Activity (Predicted) | Oxygen Tolerance (Predicted) | Subunits (Predicted) | Metal Centres (Predicted) | Accessory Subunits (Predicted) |
---|---|---|---|---|---|---|---|---|---|
WP_018992236.1 | Azoarcus toluclasticus | [NiFe] Group 3d | Betaproteobacteria | Rhodocyclales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_028994701.1 | Azonexus hydrophilus | [NiFe] Group 3d | Betaproteobacteria | Rhodocyclales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_014238042.1 | Azospira oryzae | [NiFe] Group 3d | Betaproteobacteria | Rhodocyclales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_026687097.1 | Azovibrio restrictus | [NiFe] Group 3d | Betaproteobacteria | Rhodocyclales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_027457859.1 | Dechloromonas agitata | [NiFe] Group 3d | Betaproteobacteria | Rhodocyclales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_018412521.1 | Methyloversatilis sp. NVD | [NiFe] Group 3d | Betaproteobacteria | Rhodocyclales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_020162845.1 | Methyloversatilis universalis | [NiFe] Group 3d | Betaproteobacteria | Rhodocyclales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_004322153.1 | Thauera aminoaromatica | [NiFe] Group 3d | Betaproteobacteria | Rhodocyclales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_004363405.1 | Thauera phenylacetica | [NiFe] Group 3d | Betaproteobacteria | Rhodocyclales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_002937457.1 | Thauera sp. 27 | [NiFe] Group 3d | Betaproteobacteria | Rhodocyclales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_002929027.1 | Thauera sp. 28 | [NiFe] Group 3d | Betaproteobacteria | Rhodocyclales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_004252763.1 | Thauera sp. 63 | [NiFe] Group 3d | Betaproteobacteria | Rhodocyclales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_012585448.1 | Thauera sp. MZ1T | [NiFe] Group 3d | Betaproteobacteria | Rhodocyclales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_015765571.1 | Accumulibacter phosphatis | [NiFe] Group 3d | Betaproteobacteria | Unclassified | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_012591738.1 | Methylocella silvestris | [NiFe] Group 3d | Alphaproteobacteria | Rhizobiales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_020174963.1 | Methyloferula stellata | [NiFe] Group 3d | Alphaproteobacteria | Rhizobiales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_006931831.1 | Labrenzia aggregata | [NiFe] Group 3d | Alphaproteobacteria | Rhodobacterales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_008193041.1 | Labrenzia alexandrii | [NiFe] Group 3d | Alphaproteobacteria | Rhodobacterales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_008384205.1 | Rhodovulum sp. PH10 | [NiFe] Group 3d | Alphaproteobacteria | Rhodobacterales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_011385756.1 | Magnetospirillum magneticum | [NiFe] Group 3d | Alphaproteobacteria | Rhodospirillales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_008616907.1 | Magnetospirillum sp. SO-1 | [NiFe] Group 3d | Alphaproteobacteria | Rhodospirillales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_014208491.1 | Mycobacterium rhodesiae | [NiFe] Group 3d | Actinobacteria | Actinomycetales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_011781268.1 | Mycobacterium vanbaalenii | [NiFe] Group 3d | Actinobacteria | Actinomycetales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
WP_011686721.1 | Solibacter usitatus | [NiFe] Group 3d | Acidobacteria | Solibacterales | Bidirectional | Tolerant | 4 | [NiFe]-centre, 1 x [4Fe4S] clusters | Diaphorase, [FeS] protein |
Genetics:
Physiology:
Biochemistry:
Chemistry: