[FeFe] Group A1-hydrogenase

This entry was last updated at: Feb. 9, 2018, 7:29 a.m.

Properties
Group [FeFe]-hydrogenases
Subgroup [FeFe] Group A1: Prototypical
Function Fermentative or photobiological evolution of H2 using reduced ferredoxin as an electron donor.
Activity H2-evolution
Oxygen tolerance O2-labile
Localisation Cytosolic
Distribution
Ecosystem distribution Anoxic waters, soils, and sediments, gastrointestinal tracts
Taxonomic distribution Widespread in anaerobic bacteria and unicellular eukaryotes
Genetic Organisation

Organisation 1: Chlamydomonas reinhardtii (XP_001693376.1):


Organisation 2: Trichomonas vaginalis (XP_001330775.1):


Organisation 3: Clostridium pasteurianum (WP_004455619.1):


Organisation 4: Desulfovibrio vulgaris (WP_010939057.1):


Organisation 5: Shewanella oneidensis (WP_011073665.1):


Organisation 6: Trichomonas vaginalis (XP_001580488.1):

Architecture
Structures
  • 1FEH (Clostridium pasteurianum, 1.8 Å resolution)
  • 3C8Y (Clostridium pasteurianum, 1.4 Å resolution)
  • 1C4A (Clostridium pasteurianum, 2.4 Å resolution)
  • 1HFE (Desulfovibrio desulfuricans, 1.6 Å resolution)
  • 3LX4 (Chlamydomonas reinhardtii, 2.0 Å resolution, apoenzyme)
Subunits N/A
Subunit description HydA (catalytic subunit)
In organisation 4 and 5, the catalytic subunit is split into a large subunit (HydA) and small subunit (HydS)
In organisation 5, a cytochrome b subunit (HydH) is present
In organisation 6, the hydrogenase domain is fused to a nitrate reductase or sulfite reductase domain
Catalytic site [FeFe]-centre
FeS clusters Organisation 1: Absent
Organisation 2: 2 [4Fe4S] clusters
Organisation 3: 3 [4Fe4S] clusters, 1 [2Fe2S] cluster
Organisation 4: 2 [4Fe4S] clusters
Organisation 5: 2 [4Fe4S] clusters
Organisation 6: 3 [4Fe4S] clusters, 1 [2Fe2S] cluster
Sequences in this class
NCBI AccessionOrganismHydrogenase ClassPhylumOrderActivity (Predicted)Oxygen Tolerance (Predicted)Subunits (Predicted)Metal Centres (Predicted)Accessory Subunits (Predicted)
WP_006556240.1Veillonella ratti[FeFe] Group A1FirmicutesSelenomonadalesEvolvingLabile1[FeFe]-centre, 2 x [4Fe4S] clustersNone
XP_002948483.1Volvox carteri[FeFe] Group A1ChlorophytaVolvocalesEvolvingLabile1[FeFe]-centreNone
XP_002956049.1Volvox carteri[FeFe] Group A1ChlorophytaVolvocalesEvolvingLabile1[FeFe]-centreNone
WP_026329186.1Zymophilus raffinosivorans[FeFe] Group A1FirmicutesSelenomonadalesEvolvingLabile3[FeFe]-centre, 2 x [4Fe4S] clustersSmall subunit, cytochrome b

Literature

Genetics:

Physiology:

Biochemistry:

Chemistry: