[NiFe] Group 1h-hydrogenase

This entry was last updated at: Feb. 9, 2018, 3:51 a.m.

Properties
Group [NiFe] Group 1: Respiratory H2-uptake [NiFe] hydrogenases
Subgroup [NiFe] Group 1h: Actinobacteria-type
Function Hydrogenotrophic respiration using O2 as terminal electron acceptor. Enzyme scavenges electrons from atmospheric H2 to fuel respiratory chain during carbon-starvation. Route of electron transfer unresolved.
Activity H2-uptake (unidirectional, high-affinity)
Oxygen tolerance O2-tolerant or O2-insensitive
Localisation Membrane-associated?
Distribution
Ecosystem distribution Upland soils, plant tissues, possibly surface waters
Taxonomic distribution Widespread among obligately aerobic soil bacteria, especially Actinobacteria, Acidobacteria, and Chloroflexi
Genetic Organisation

e.g. Mycobacterium smegmatis (WP_003893634.1):

Architecture
Structures
  • 5AA5 (Ralstonia eutropha, 2.5 Å resolution, active)
Subunits 3?
Subunit description HyhL (hydrogenase large subunit)
HyhS (hydrogenase small subunit) HyhE (putative iron-sulfur protein and proposed physiological electron acceptor)
Catalytic site [NiFe]-centre
FeS clusters Proximal: 3Cys1Asp[4Fe4S]
Medial: 4Cys[4Fe4S]
Distal: 3Cys1His[4Fe4S]
Important Notes
The Robiginitalea biformata and Sulfolobus islandicus enzymes are relatively distantly related to the main group. No studies have yet tested whether these enzymes have a H2-scavenging role like other Group 1h [NiFe]-hydrogenases. They may instead represent founding members of a functionally-distinct lineage.
Sequences in this class
NCBI AccessionOrganismHydrogenase ClassPhylumOrderActivity (Predicted)Oxygen Tolerance (Predicted)Subunits (Predicted)Metal Centres (Predicted)Accessory Subunits (Predicted)
WP_048100378.1Acidianus copahuensis[NiFe] Group 1hCrenarchaeotaSulfolobalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_021597135.1Actinomadura madurae[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_026402909.1Actinomadura rifamycini[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_018330638.1Actinomycetospora chiangmaiensis[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_020516695.1Actinoplanes globisporus[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_026468830.1Amycolatopsis balhimycina[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_007034607.1Amycolatopsis decaplanina[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_013225646.1Amycolatopsis mediterranei[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_027944444.1Amycolatopsis taiwanensis[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_004559486.1Amycolatopsis vancoresmycina[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_013806771.1Amycolicicoccus subflavus[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_003801347.1Arthrobacter globiformis[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_014376814.1Blastococcus saxobsidens[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_012934014.1Conexibacter woesei[NiFe] Group 1hActinobacteriaSolirubrobacteralesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_011603554.1Frankia alni[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_018502886.1Frankia sp. BCU110501[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_007516725.1Frankia sp. CN3[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_020460087.1Frankia sp. EAN1pec[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_006543203.1Frankia sp. EUN1f[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_013423858.1Frankia sp. EuI1c[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_009739394.1Frankia sp. QA3[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_006334825.1Gordonia rhizosphera[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_014267363.1Granulicella mallensis[NiFe] Group 1hAcidobacteriaAcidobacterialesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_007904650.1Ktedonobacter racemifer[NiFe] Group 1hChloroflexiKtedonobacterialesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_009061231.1Methylacidiphilum fumariolicum[NiFe] Group 1hVerrucomicrobiaMethylacidiphialesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_016920676.1Methylocystis parvus[NiFe] Group 1hAlphaproteobacteriaRhizobialesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_029651411.1Methylocystis sp. SB2[NiFe] Group 1hAlphaproteobacteriaRhizobialesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_014892893.1Methylocystis sp. SC2[NiFe] Group 1hAlphaproteobacteriaRhizobialesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_003612931.1Methylosinus trichosporium[NiFe] Group 1hAlphaproteobacteriaRhizobialesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_011724971.1Mycobacterium avium[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_014815377.1Mycobacterium chubuense[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_007775170.1Mycobacterium colombiense[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_014942609.1Mycobacterium indicus[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_023372393.1Mycobacterium kansasii[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_015355236.1Mycobacterium liflandii[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_020728307.1Mycobacterium marinum[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_007171456.1Mycobacterium parascrofulaceum[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_005141693.1Mycobacterium rhodesiae[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_003894103.1Mycobacterium smegmatis [NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_003926809.1Mycobacterium thermoresistibile[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_006242884.1Mycobacterium tusciae[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_003933589.1Mycobacterium vaccae[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_003922139.1Mycobacterium xenopi[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_020823195.1Mycobacterium yongonense[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_008474746.1Nitrolancea hollandica[NiFe] Group 1hChloroflexiSphaerobacteralesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_025349261.1Nocardia nova[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_017611790.1Nocardiopsis salina[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_020540932.1Nonomuraea coxensis[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_007412921.1Pedosphaera parvula[NiFe] Group 1hVerrucomicrobiaVerrucomicrobialesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_028930304.1Pseudonocardia asaccharolytica[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein

Literature

Genetics:

Physiology:

Biochemistry: