Patent ID: 7851180

Claim:
A microorganism for producing O-succinylhomoserine, comprising: 1) a mutated homoserine O-succinyltransferase (EC2.3.1.46) which is resistant to methionine feed back inhibition or regulation, wherein homoserine O-succinyltransferase is represented by SEQ ID NO: 30 with Genbank Accession No. AAC76983, and the mutated homoserine O-succinyltransferase is a polypeptide having one or more amino acid mutation at a position corresponding to 79, 114, 140, 163, 222, 275, 290, 291, 304,and 305 of SEQ ID NO: 30 or a polypeptide represented by SEQ ID NO: 14, 16, 18, 20, or 22; and 2) an aspartokinase or homoserine dehydrogenase (EC2.7.2.4 or 1.1.1.3) with enhanced activity as compared to an unmodified microorganism.