Cysteine synthase
Definition:
EC Tree > 2 Transferases > 2.5 Transferring alkyl or aryl groups, other than methyl groups > 2.5.1 Transferring alkyl or aryl groups, other than methyl groups (only sub-subclass identified to date) > 2.5.1.47 cysteine synthase
Cysteine synthase is a pyridoxal-phosphate enzyme of sulfur assimilation. It condenses O-acetyl-L-serine with hydrogen sulfide, releasing acetate and forming L-cysteine. Some alkyl thiols, cyanide, pyrazole and other heterocycles can act as acceptors. It is distinct from EC 2.5.1.51, EC 2.5.1.52 and EC 2.5.1.53. It occurs in Bacteria, Eukaryota and Archaea and is the primary cysteine-biosynthesis enzyme.
Cysteine synthase is a pyridoxal-phosphate enzyme of sulfur assimilation. It condenses O-acetyl-L-serine with hydrogen sulfide, releasing acetate and forming L-cysteine. Some alkyl thiols, cyanide, pyrazole and other heterocycles can act as acceptors. It is distinct from EC 2.5.1.51, EC 2.5.1.52 and EC 2.5.1.53. It occurs in Bacteria, Eukaryota and Archaea and is the primary cysteine-biosynthesis enzyme.
References:
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