NOVEL VARIANT OF O-PHOSPHOSERINE EXPORTER AND METHOD OF PRODUCING O-PHOSPHOSERINE, CYSTEINE, AND ITS DERIVATIVES USING THE SAME

摘要

The present invention pertains to: a novel variant polypeptide having efflux activity of O-phosphoserine (OPS) which is an L-cysteine precursor; a polynucleotide encoding the polypeptide; an OPS-producing microorganism expressing the polypeptide; a method for producing OPS by using the microorganism; and a method for producing cysteine or a derivative thereof, the method comprising the step of reacting OPS produced by the above method with a sulfide in the presence of O-phosphoserine sulfhydrylase (OPSS) or a microorganism expressing OPSS.