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hyaA | Hydrogenase 1, small subunit; This is one of three E.coli hydrogenases synthesized in response to different physiological conditions. HYD1 is believed to have a role in hydrogen cycling during fermentative growth; Belongs to the [NiFe]/[NiFeSe] hydrogenase small subunit family. (372 aa) | ||||
hyaB | Hydrogenase 1, large subunit; This is one of three E.coli hydrogenases synthesized in response to different physiological conditions. HYD1 is believed to have a role in hydrogen cycling during fermentative growth; Belongs to the [NiFe]/[NiFeSe] hydrogenase large subunit family. (597 aa) | ||||
hyaC | Hydrogenase 1, b-type cytochrome subunit; Probable b-type cytochrome; Belongs to the HupC/HyaC/HydC family. (235 aa) | ||||
hyaD | Hydrogenase 1 maturation protease; Protease involved in the C-terminal processing of HyaB, the large subunit of hydrogenase 1; Belongs to the peptidase A31 family. (195 aa) | ||||
hyaE | Putative HyaA chaperone; Not known. Could form, along with HyaD, a complex involved in the processing of the hydrogenase 1 structural operon. (132 aa) | ||||
hyaF | Hydrogenase-1 protein nickel incorporation factor; Not known. Could enhance the incorporation of nickel to the hydrogenase. (285 aa) | ||||
cbdA | Cytochrome bd-II oxidase, subunit I; A terminal oxidase that catalyzes quinol-dependent, Na(+)- independent oxygen uptake. Prefers menadiol over other quinols although ubiquinol was not tested. Generates a proton motive force using protons and electrons from opposite sides of the membrane to generate H(2)O, transferring 1 proton/electron. (514 aa) | ||||
cbdB | Cytochrome bd-II oxidase, subunit II; A terminal oxidase that catalyzes quinol-dependent, Na(+)- independent oxygen uptake. Prefers menadiol over other quinols although ubiquinol was not tested. Generates a proton motive force using protons and electrons from opposite sides of the membrane to generate H(2)O, transferring 1 proton/electron. (378 aa) | ||||
appA | Phosphoanhydride phosphorylase; pH 2.5 acid phosphatase; periplasmic; Protein involved in phosphorus metabolic process and response to starvation. (432 aa) | ||||
ppsR | PEP synthase kinase and PEP synthase pyrophosphorylase; Bifunctional serine/threonine kinase and phosphorylase involved in the regulation of the phosphoenolpyruvate synthase (PEPS) by catalyzing its phosphorylation/dephosphorylation. (277 aa) | ||||
hypF | Carbamoyl phosphate phosphatase and [NiFe] hydrogenase maturation protein; Involved in the maturation of [NiFe] hydrogenases. Along with HypE, it catalyzes the synthesis of the CN ligands of the active site iron of [NiFe]-hydrogenases. HypF functions as a carbamoyl transferase using carbamoylphosphate as a substrate and transferring the carboxamido moiety in an ATP-dependent reaction to the thiolate of the C-terminal cysteine of HypE yielding a protein-S-carboxamide. In the absence of any other substrate, displays carbamoyl-phosphate phosphatase activity. (750 aa) | ||||
hypA | Protein involved in nickel insertion into hydrogenases 3; Involved in the maturation of [NiFe] hydrogenases. Required for nickel insertion into the metal center of the hydrogenase. Mediates transfer of nickel, but not zinc, from the low-affinity metal-binding site in the GTPase domain of HypB to HypA. HypA is involved in maturation of hydrogenase 3. It may partially substitute for the function of HybF and vice versa. May act as a scaffold for assembly of the nickel insertion proteins with the hydrogenase precursor protein after delivery of the iron center. Belongs to the HypA/HybF family. (116 aa) | ||||
hypB | GTP hydrolase involved in nickel liganding into hydrogenases; Involved in the maturation of [NiFe] hydrogenases. Required for nickel insertion into the metal center of the hydrogenase. Exhibits a low intrinsic GTPase activity, which is essential for nickel insertion. In the presence of GDP, nickel, but not zinc, is transferred from the HypB GTPase domain (G-domain) to HypA. Belongs to the SIMIBI class G3E GTPase family. HypB/HupM subfamily. (290 aa) | ||||
hypC | Hydrogenase maturation protein; Involved in the maturation of [NiFe] hydrogenases. Involved in the biosynthesis of the Fe(CN)(2)CO cofactor. HypC delivers iron-bound CO(2) to HypD where reduction to CO probably occurs. In complex with HypD, accepts the cyanide ligand generated by HypF and HypE, and also coordinates the carbon monoxide ligand. Involved in the maturation of the hydrogenase 3. Also participates in the maturation of hydrogenase 1. (90 aa) | ||||
hypD | Hydrogenase maturation protein; Involved in the maturation of [NiFe] hydrogenases. Involved in the biosynthesis of the Fe(CN)(2)CO cofactor. HypD may act as a scaffold on which the Fe(CN)(2)CO cofactor is formed. In complex with HypC, accepts the cyanide ligand generated by HypF and HypE, and also coordinates the carbon monoxide ligand. Required for the formation of all three hydrogenase isoenzymes (Probable). (373 aa) | ||||
hypE | Carbamoyl dehydratase, hydrogenases 1,2,3 maturation protein; Involved in the maturation of [NiFe] hydrogenases. Along with HypF, it catalyzes the synthesis of the CN ligands of the active site iron of [NiFe]-hydrogenases. HypE catalyzes the ATP-dependent dehydration of the carboxamido group attached to its C-terminal cysteine to a cyano group. The cyano group is then transferred from HypE to the HypC-HypD complex or the HybG-HypD complex. (336 aa) | ||||
hybG | Hydrogenase 2 accessory protein; Involved in the maturation of [NiFe] hydrogenases. Involved in the biosynthesis of the Fe(CN)(2)CO cofactor. HybG delivers iron-bound CO(2) to HypD where reduction to CO probably occurs. In complex with HypD, accepts the cyanide ligand generated by HypF and HypE, and also coordinates the carbon monoxide ligand (By similarity). Involved in the maturation of the hydrogenase 2. Also participates in the maturation of hydrogenase 1. (82 aa) | ||||
hybF | Protein involved with the maturation of hydrogenases 1 and 2; Involved in the maturation of [NiFe] hydrogenases. Required for nickel insertion into the metal center of the hydrogenase. HybF is involved in maturation of hydrogenases 1 and 2. It may partially substitute for the function of HypA and vice versa. (113 aa) | ||||
hybE | Hydrogenase 2-specific chaperone; Member of hyb operon. (162 aa) | ||||
hybD | Maturation protease for hydrogenase 2; Protease involved in the C-terminal processing of HybC, the large subunit of hydrogenase 2. Specifically cleaves off a 15 amino acid peptide from the C-terminus of the precursor of HybC; Belongs to the peptidase A31 family. (164 aa) | ||||
hybC | Hydrogenase 2, large subunit; This is one of three E.coli hydrogenases synthesized in response to different physiological conditions. HYD2 is involved in hydrogen uptake; Belongs to the [NiFe]/[NiFeSe] hydrogenase large subunit family. (567 aa) | ||||
hybB | Putative hydrogenase 2 cytochrome b type component; Probable b-type cytochrome; Belongs to the NrfD family. (392 aa) | ||||
hybA | Hydrogenase 2 4Fe-4S ferredoxin-type component; Participates in the periplasmic electron-transferring activity of hydrogenase 2 during its catalytic turnover. (328 aa) | ||||
hybO | Hydrogenase 2, small subunit; This is one of three E.coli hydrogenases synthesized in response to different physiological conditions. HYD2 is involved in hydrogen uptake; Belongs to the [NiFe]/[NiFeSe] hydrogenase small subunit family. (372 aa) | ||||
cbdX | Putative cytochrome bd-II oxidase subunit; Might be part of cytochrome bd-II oxidase (appB and appC). Able to restore reductant resistance to a cydX deletion mutant upon overexpression. CydX and this protein may have some functional overlap. (30 aa) |