Enzymes
| UniProtKB help_outline | 3 proteins |
Reaction participants Show >> << Hide
- Name help_outline hydrogen sulfide Identifier CHEBI:29919 (CAS: 15035-72-0) help_outline Charge -1 Formula HS InChIKeyhelp_outline RWSOTUBLDIXVET-UHFFFAOYSA-M SMILEShelp_outline [S-][H] 2D coordinates Mol file for the small molecule Search links Involved in 56 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline O-succinyl-L-serine Identifier CHEBI:136856 Charge -1 Formula C7H10NO6 InChIKeyhelp_outline ZAHSBRLHJRVFAU-BYPYZUCNSA-M SMILEShelp_outline C(OC[C@@H](C([O-])=O)[NH3+])(CCC([O-])=O)=O 2D coordinates Mol file for the small molecule Search links Involved in 2 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline L-cysteine Identifier CHEBI:35235 Charge 0 Formula C3H7NO2S InChIKeyhelp_outline XUJNEKJLAYXESH-REOHCLBHSA-N SMILEShelp_outline [NH3+][C@@H](CS)C([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 61 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline succinate Identifier CHEBI:30031 (Beilstein: 1863859; CAS: 56-14-4) help_outline Charge -2 Formula C4H4O4 InChIKeyhelp_outline KDYFGRWQOYBRFD-UHFFFAOYSA-L SMILEShelp_outline [O-]C(=O)CCC([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 331 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:53816 | RHEA:53817 | RHEA:53818 | RHEA:53819 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
| UniProtKB help_outline |
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Publications
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Parallel evolution of non-homologous isofunctional enzymes in methionine biosynthesis.
Bastard K., Perret A., Mariage A., Bessonnet T., Pinet-Turpault A., Petit J.L., Darii E., Bazire P., Vergne-Vaxelaire C., Brewee C., Debard A., Pellouin V., Besnard-Gonnet M., Artiguenave F., Medigue C., Vallenet D., Danchin A., Zaparucha A., Weissenbach J., Salanoubat M., de Berardinis V.
Experimental validation of enzyme function is crucial for genome interpretation, but it remains challenging because it cannot be scaled up to accommodate the constant accumulation of genome sequences. We tackled this issue for the MetA and MetX enzyme families, phylogenetically unrelated families ... >> More
Experimental validation of enzyme function is crucial for genome interpretation, but it remains challenging because it cannot be scaled up to accommodate the constant accumulation of genome sequences. We tackled this issue for the MetA and MetX enzyme families, phylogenetically unrelated families of acyl-L-homoserine transferases involved in L-methionine biosynthesis. Members of these families are prone to incorrect annotation because MetX and MetA enzymes are assumed to always use acetyl-CoA and succinyl-CoA, respectively. We determined the enzymatic activities of 100 enzymes from diverse species, and interpreted the results by structural classification of active sites based on protein structure modeling. We predict that >60% of the 10,000 sequences from these families currently present in databases are incorrectly annotated, and suggest that acetyl-CoA was originally the sole substrate of these isofunctional enzymes, which evolved to use exclusively succinyl-CoA in the most recent bacteria. We also uncovered a divergent subgroup of MetX enzymes in fungi that participate only in L-cysteine biosynthesis as O-succinyl-L-serine transferases. << Less
Nat. Chem. Biol. 13:858-866(2017) [PubMed] [EuropePMC]
This publication is cited by 3 other entries.