L-CYSTEINE-PRODUCING MICROORGANISM AND METHOD FOR PRODUCING L-CYSTEINE

摘要

PROBLEM TO BE SOLVED: To provide a new method for the production of L-cysteine by finding a yeast having cysteine desulfuhydrase activity and its gene in Escherichia bacteria and using the gene for the breeding of an L-crysteine producing strain. SOLUTION: A bacterial strain of the genus Escherichia having L-crysteine productivity and lowered or depleted cystathionine-β-lyase activity, or cystathionine-β-lyase activity and tryptophanase activity is cultured in a medium to produce and accumulate L-cysteine in the medium and the accumulated L-cysteine is separated from the medium. COPYRIGHT: (C)2003,JPO