| 摘要 |
PURPOSE:To obtain the subject compound useful for cosmetic, etc., on an industrial scale at a low cost by reacting O-acetyl-L-serine with a metal sulfide, etc., in the presence of cells of microorganism belonging to genus Corynebacterium, etc., and having O-acetylserine sulfhydrase activity. CONSTITUTION:The objective sulfur-containing L-amino acid (e.g. L-cysteine) can be produced by reacting O-acetyl-L-serine with a metal sulfide, a metal hydrosulfide (e.g. sodium hydrosulfide) or hydrogen sulfide, etc., in the presence of cells, cultured product or their treated product of a microorganism belonging to genus Corynebacterium or genus Brevibacterium and having O-acetylserine sulfhydrase activity (e.g. Brevibacterium flavum ATCC 13826) to accumulate a sulfur-containing L-amino acid in the reaction mixture and collecting the objective reaction product from the reaction mixture. |
