[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_005454024.1Saccharomonospora cyanea[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_005461984.1Saccharomonospora glauca[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_019807844.1Saccharomonospora halophila[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_009155165.1Saccharomonospora marina[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_019819110.1Saccharomonospora saliphila[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_012796301.1Saccharomonospora viridis[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_006237565.1Saccharomonospora xinjiangensis[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_009945368.1Saccharopolyspora erythraea[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_010696688.1Saccharopolyspora spinosa[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_020500148.1Sciscionella marina[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_018161883.1Smaragdicoccus niigatensis[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_020274692.1Streptomyces afghaniensis[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_016573948.1Streptomyces albulus[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_006608003.1Streptomyces auratus[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_010988762.1Streptomyces avermitilis[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_005474054.1Streptomyces bottropensis[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_020124082.1Streptomyces canus[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_014150953.1Streptomyces cattleya[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_003957662.1Streptomyces clavuligerus[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_020938041.1Streptomyces collinus[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_015655687.1Streptomyces davawensis[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_004921512.1Streptomyces griseoflavus[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_014670577.1Streptomyces hygroscopicus[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_023543351.1Streptomyces niveus[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_023553242.1Streptomyces roseochromogenes[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_013006069.1Streptomyces scabiei[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_026219116.1Streptomyces scabrisporus[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_007380332.1Streptomyces sviceus[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_006350699.1Streptomyces tsukubaensis[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_003988175.1Streptomyces viridochromogenes[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_012890477.1Streptosporangium roseum[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_013132859.1Thermobispora bispora[NiFe] Group 1hActinobacteriaActinomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_012854897.1Thermomonospora curvata[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_028062027.1Solirubrobacter soli[NiFe] Group 1hActinobacteriaSolirubrobacteralesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_028059415.1Solirubrobacter sp. URHD0082[NiFe] Group 1hActinobacteriaSolirubrobacteralesAerobic 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_012813797.1Robiginitalea biformata[NiFe] Group 1hBacteroidetesFlavobacterialesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_011153987.1Ralstonia eutropha[NiFe] Group 1hBetaproteobacteriaBurkholderialesAerobic 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_008474746.1Nitrolancea hollandica[NiFe] Group 1hChloroflexiSphaerobacteralesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_012872944.1Sphaerobacter thermophilus[NiFe] Group 1hChloroflexiSphaerobacteralesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_015922819.1Thermomicrobium roseum[NiFe] Group 1hChloroflexiThermomicrobialesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_014512387.1Sulfolobus islandicus[NiFe] Group 1hCrenarchaeotaSulfolobalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_020375837.1Sulfobacillus thermosulfidooxidans[NiFe] Group 1hFirmicutesBacillalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_010587703.1Schlesneria paludicola[NiFe] Group 1hPlanctomycetesPlanctomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein
WP_015247797.1Singulisphaera acidiphila[NiFe] Group 1hPlanctomycetesPlanctomycetalesAerobic UptakeTolerant3[NiFe]-centre, 3 x [4Fe4S] clusters[FeS] protein

Literature

Genetics:

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