[NiFe] Group 4a-hydrogenase

This entry was last updated at: Feb. 9, 2018, 7:09 a.m.

Properties
Group [NiFe] Group 4: Respiratory H2-evolving [NiFe] hydrogenases
Subgroup [NiFe] Group 4a: Formate hydrogenlyases
Function Directly couples formate oxidation to H2 evolution. It remains unclear whether this process can be coupled to proton-translocation through the transmembrane modules. Reverse reaction occurs in vitro but unresolved whether it occurs in vivo.
Activity H2-evolution
Oxygen tolerance O2-sensitive
Localisation Membrane-bound
Distribution
Ecosystem distribution Animal gastrointestinal tracts
Taxonomic distribution Encoded in Enterobacteria and several other Proteobacteria
Genetic Organisation

Organisation 1: Escherichia coli hyc operon (WP_014639275.1):


Organisation 2: Escherichia coli hyf operon (WP_014641051.1):

Architecture
Structures
    None
Subunits 6 or 9
Subunit description HycE / HyfG (hydrogenase large subunit)
HycG / HyfI (hydrogenase small subunit)
HycF / HyfH (iron-sulfur protein)
HycB / HyfA (iron-sulfur protein)
HycC / HyfB (NuoL-like transmembrane adaptors)
HycD / HyfC (NuoH-like transmembrane adaptors)
Hyf-type enzymes additionally associated with three antiporter-like subunits (HyfD, HyfE, HyfF)
Loosely associated with formate dehydrogenase module (FdhF)
Catalytic site [NiFe]-centre
FeS clusters Proximal: 4Cys[4Fe4S]
Medial: Absent
Distal: Absent
Important Notes
It remains to be resolved whether the formate hydrogenlyase is fermentative (proton-nontranslocating) or respiring (proton-translocating) complex. Based on structural analysis of Complex I suggests, it is possible that the NuoL-like and NuoM-like subunits are proton-translocating. It is likely that Hyf-like complexes can generate membrane potential through its antiporter-like subunits.
Sequences in this class
NCBI AccessionOrganismHydrogenase ClassPhylumOrderActivity (Predicted)Oxygen Tolerance (Predicted)Subunits (Predicted)Metal Centres (Predicted)Accessory Subunits (Predicted)
WP_021804850.1Serratia fonticola[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_020826906.1Serratia liquefaciens[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_004948138.1Serratia plymuthica[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_012145158.1Serratia proteamaculans[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_021015295.1Serratia sp. ATCC 39006[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_017892850.1Serratia sp. S4[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_001102284.1Shigella boydii[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_001288110.1Shigella boydii[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_001102300.1Shigella dysenteriae[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_001102290.1Shigella flexneri[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_001288148.1Shigella flexneri[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_001288143.1Shigella sonnei[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_002445316.1Shimwellia blattae[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_002440707.1Shimwellia blattae[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_004699424.1Yersinia aldovae[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_005273806.1Yersinia bercovieri[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_005162305.1Yersinia enterocolitica[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_004709176.1Yersinia frederiksenii[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_005187619.1Yersinia intermedia[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_004388743.1Yersinia kristensenii[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_004877798.1Yersinia mollaretii[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_004713500.1Yersinia rohdei[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_004720656.1Yersinia ruckeri[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_006818557.1Yokenella regensburgei[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_005542188.1Aggregatibacter actinomycetemcomitans[NiFe] Group 4aGammaproteobacteriaPasteurellalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_005703984.1Aggregatibacter aphrophilus[NiFe] Group 4aGammaproteobacteriaPasteurellalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_005645455.1Haemophilus haemolyticus[NiFe] Group 4aGammaproteobacteriaPasteurellalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_014065500.1Haemophilus parainfluenzae[NiFe] Group 4aGammaproteobacteriaPasteurellalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_007242420.1Haemophilus pittmaniae[NiFe] Group 4aGammaproteobacteriaPasteurellalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_005760524.1Pasteurella bettyae[NiFe] Group 4aGammaproteobacteriaPasteurellalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_005764546.1Pasteurella dagmatis[NiFe] Group 4aGammaproteobacteriaPasteurellalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_005366168.1Photobacterium angustum[NiFe] Group 4aGammaproteobacteriaVibrionalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_008989674.1Photobacterium leiognathi[NiFe] Group 4aGammaproteobacteriaVibrionalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_006232936.1Photobacterium profundum[NiFe] Group 4aGammaproteobacteriaVibrionalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_007469705.1Photobacterium sp. AK15[NiFe] Group 4aGammaproteobacteriaVibrionalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_006644813.1Photobacterium sp. SKA34[NiFe] Group 4aGammaproteobacteriaVibrionalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_004726128.1Vibrio furnissii[NiFe] Group 4aGammaproteobacteriaVibrionalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_021019734.1Vibrio gazogenes[NiFe] Group 4aGammaproteobacteriaVibrionalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)

Literature

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