Patent ID: 7399617

Claim:
A method for producing an L-amino acid selected from the group consisting of L-glutamic acid, L-alanine, L-valine, L-isoleucine, L-histidine and L-proline, comprising: I) cultivating in a culture medium an Escherichia bacterium which has an ability to produce an L-amino acid selected from the group consisting of L-glutamic acid, L-alanine, L-valine, L-isoleucine, L-histidine and L-proline, wherein said ability to produce the L-amino acid is increased by increasing expression of a protein comprising the amino acid sequence shown in SEQ ID NO: 12, wherein the expression is increased relative to the expression of said protein in a wild-type strain MG1655 or W3110 by increasing the copy number of the DNA coding for said protein or by replacing the native promoter with a stronger promoter for expression of the DNA coding for said protein, and II) recovering the L-amino acid from the medium.