[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_019844844.1Dickeya zeae[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_020454964.1Enterobacter sp. R4-368[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_020845056.1Salmonella bongori[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_020883834.1Enterobacter cloacae[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_021019734.1Vibrio gazogenes[NiFe] Group 4aGammaproteobacteriaVibrionalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_021091787.1Campylobacter concisus[NiFe] Group 4aEpsilonproteobacteriaCampylobacteralesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_021804850.1Serratia fonticola[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_022065323.1Klebsiella variicola[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_022095197.1Collinsella sp. CAG:166[NiFe] Group 4aActinobacteriaCoriobacteralesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_022587809.1Caldanaerobacter subterraneus[NiFe] Group 4aFirmicutesThermoanaerobacteralesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_022632933.1Dickeya solani[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_022739022.1Adlercreutzia equolifaciens[NiFe] Group 4aActinobacteriaCoriobacteralesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_023227550.1Salmonella enterica[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_023331166.1Enterobacter sp. MGH 25[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_023342092.1Klebsiella pneumoniae[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_023384105.1Campylobacter fetus[NiFe] Group 4aEpsilonproteobacteriaCampylobacteralesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_024105256.1Dickeya dianthicola[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_024524460.1Edwardsiella hoshinae[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_024559362.1Cronobacter pulveris[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_024953588.1Sulfurospirillum arcachonense[NiFe] Group 4aEpsilonproteobacteriaCampylobacteralesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_024955559.1Sulfurospirillum arcachonense[NiFe] Group 4aEpsilonproteobacteriaCampylobacteralesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_025151932.1Morganella morganii[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_025345477.1Sulfurospirillum multivorans[NiFe] Group 4aEpsilonproteobacteriaCampylobacteralesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_025773400.1Moorella thermoacetica[NiFe] Group 4aFirmicutesThermoanaerobacteralesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_025797024.1Hafnia alvei[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_025801577.1Hafnia alvei[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_025820124.1Shewanella marina[NiFe] Group 4aGammaproteobacteriaAlteromonadalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_025912384.1Enterobacter sp. 5-4[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_026823431.1Arsenophonus nasoniae[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_027275601.1Leminorella grimontii[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_027712521.1Erwinia chrysanthemi[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_028027490.1Enterorhabdus mucosicola[NiFe] Group 4aActinobacteriaCoriobacteralesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_028536385.1Paludibacterium yongneupense[NiFe] Group 4aBetaproteobacteriaNeisserialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_029010114.1Azospirillum halopraeferens[NiFe] Group 4aAlphaproteobacteriaRhodospirillalesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_029095340.1Budvicia aquatica[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)
WP_029739528.1Enterobacter asburiae[NiFe] Group 4aGammaproteobacteriaEnterobacterialesEvolvingSensitive6 or 9[NiFe]-centre, 1 x [4Fe4S] clustersNuoL, NuoH, two [FeS] proteins, (three antiporter subunits)

Literature

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