cysteine synthase activity

Catalysis of the reaction: O3-acetyl-L-serine + hydrogen sulfide = L-cysteine + acetate.

3-O-acetyl-L-serine:hydrogen-sulfide 2-amino-2-carboxyethyltransferase activity, O(3)-acetyl-L-serine acetate-lyase (adding hydrogen-sulfide) activity, O-acetyl-L-serine sulfhydrylase activity, O-acetyl-L-serine sulfohydrolase activity, O-acetylserine (thiol)-lyase A activity, O-acetylserine (thiol)-lyase activity, O-acetylserine sulfhydrylase activity, O3-acetyl-L-serine acetate-lyase (adding hydrogen-sulfide), O3-acetyl-L-serine:hydrogen-sulfide 2-amino-2-carboxyethyltransferase activity, OAS sulfhydrylase activity, acetylserine sulfhydrylase activity, cysteine synthase activity, cysteine synthetase activity