FIELD: medicine.
SUBSTANCE: what is presented is a protein able to make the bacterium of Enterobacteriaceae family stable to L-cysteine induced growth inhibition and specified in a group consisting of: (a) protein presented in SEQ ID NO: 2 or its version, and (b) protein presented in SEQ ID NO: 4 or its version, what is also presented is a DNA fragment coding said protein. What is described is a L-amino acid producer bacterium of Enterobacteriaceae family containing said DNA fragment. What is offered is a method for producing L-amino acid involving cultivation of said bacterium in the nutrient medium and recovery of said L-amino acid from a culture fluid.
EFFECT: invention provides higher yield of produced L-amino acid.
12 cl, 12 tbl, 1 dwg, 8 ex
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