Patent ID: 8383363

Claim:
A method for producing a basic L-amino acid comprising: A) culturing an Escherichia coli bacterium in a medium, and B) collecting said basic L-amino acid from the medium and/or the bacterium, wherein said bacterium has been modified to have enhanced expression of a ybjE gene as compared to a non-modified Escherichia coli bacterium, and wherein said ybjE gene encodes a protein which is 95% or more homologous to an amino acid sequence selected from the group consisting of: a) the entire amino acid sequence of SEQ ID NO: 2, and b) the amino acid sequence of numbers 17 to 315 of SEQ ID NO: 2; and wherein said protein imparts the ability to said Escherichia coli bacterium to export a basic L-amino acid, and wherein the enhanced expression of said ybjE gene is obtained by a method selected from the group consisting of: i) increasing the copy number of said ybjE gene, ii) replacing a promoter of said ybjE gene with a stronger promoter, and iii) combinations thereof.