This entry was last updated at: March 2, 2017, 1:49 a.m.
Group | [NiFe] Group 1: Respiratory H2-uptake [NiFe] hydrogenases |
Subgroup | [NiFe] Group 1c: Hyb-type |
Function | Hydrogenotrophic respiration using fumarate, sulfate, or metals as terminal electron acceptors. Route of electron transfer unresolved. Can also fermentatively evolve H2 under hypoxia. |
Activity | H2-uptake (unidirectional) |
Oxygen tolerance | O2-sensitive |
Localisation | Membrane-bound |
Ecosystem distribution | Animal gastrointestinal tracts, anoxic soils and sediments |
Taxonomic distribution | Widespread in Enterobacteria and various sulfate-reducing bacteria |
e.g. Escherichia coli (WP_021568771.1):
Structures |
|
Subunits | 4 |
Subunit description | HybC (hydrogenase large subunit) HybO (hydrogenase small subunit) HybA (iron-sulfur protein and proposed physiological electron acceptor) HybB (transmembrane protein of unresolved function) |
Catalytic site | [NiFe]-centre |
FeS clusters | Proximal: 4Cys[4Fe4S] Medial: 3Cys[3Fe4S] Distal: 3Cys1His[4Fe4S] |
NCBI Accession | Organism | Hydrogenase Class | Phylum | Order | Activity (Predicted) | Oxygen Tolerance (Predicted) | Subunits (Predicted) | Metal Centres (Predicted) | Accessory Subunits (Predicted) |
---|---|---|---|---|---|---|---|---|---|
WP_028579802.1 | Desulfobulbus japonicus | [NiFe] Group 1c | Deltaproteobacteria | Desulfobacterales | Anaerobic Uptake | Sensitive | 4 | [NiFe]-centre, 2 x [4Fe4S] clusters, 1 x [3Fe4S] cluster | [FeS] protein, TM subunit |
WP_028581743.1 | Desulfobulbus japonicus | [NiFe] Group 1c | Deltaproteobacteria | Desulfobacterales | Anaerobic Uptake | Sensitive | 4 | [NiFe]-centre, 2 x [4Fe4S] clusters, 1 x [3Fe4S] cluster | [FeS] protein, TM subunit |
WP_028583198.1 | Desulfobulbus mediterraneus | [NiFe] Group 1c | Deltaproteobacteria | Desulfobacterales | Anaerobic Uptake | Sensitive | 4 | [NiFe]-centre, 2 x [4Fe4S] clusters, 1 x [3Fe4S] cluster | [FeS] protein, TM subunit |
WP_028840815.1 | Thermodesulfobacterium hveragerdense | [NiFe] Group 1c | Thermodesulfobacteria | Thermodesulfobacteriales | Anaerobic Uptake | Sensitive | 4 | [NiFe]-centre, 2 x [4Fe4S] clusters, 1 x [3Fe4S] cluster | [FeS] protein, TM subunit |
WP_029009764.1 | Azospirillum halopraeferens | [NiFe] Group 1c | Alphaproteobacteria | Rhodospirillales | Anaerobic Uptake | Sensitive | 4 | [NiFe]-centre, 2 x [4Fe4S] clusters, 1 x [3Fe4S] cluster | [FeS] protein, TM subunit |
WP_029095540.1 | Budvicia aquatica | [NiFe] Group 1c | Gammaproteobacteria | Enterobacteriales | Anaerobic Uptake | Sensitive | 4 | [NiFe]-centre, 2 x [4Fe4S] clusters, 1 x [3Fe4S] cluster | [FeS] protein, TM subunit |
WP_029132834.1 | Sedimenticola selenatireducens | [NiFe] Group 1c | Gammaproteobacteria | Alteromonadales | Anaerobic Uptake | Sensitive | 4 | [NiFe]-centre, 2 x [4Fe4S] clusters, 1 x [3Fe4S] cluster | [FeS] protein, TM subunit |
Genetics:
Physiology:
Biochemistry: