Method for producing L-amino acids using bacteria of the enterobacteriaceae family

A method for producing L-amino acid, which comprises cultivating a bacterium of Enterobacteriaceae family in a culture medium to cause accumulation of the L-amino acid in the culture medium, and isolating the L-amino acid from the culture medium, wherein said bacterium has been modified to enhance an activity of D-xylose permease and activities of xylose utilization proteins encoded by xylABFGHR locus by a method selected from the group consisting of:

• a) increasing the copy number of a gene encoding D-xylose permease and the xylABFGHR locus,
• b) placing the gene encoding D-xylose permease and the xylABFGHR locus under the control of a potent promoter, and
• c) combinations thereof,
• wherein the carbon source in said culture medium consists of glucose;
• and
• wherein said D-xylose permease and said xylose utilization proteins encoded by xylABFGHR locus are both derived from a bacteria of the Enterobacteriaceae family.