FIELD: biotechnology.
SUBSTANCE: invention relates to biotechnology and represents a version of acetate metabolism regulator A, having activity of acetate metabolism regulator A, in which the amino acid corresponding to position 56 in the amino acid sequence SEQ ID NO: 3 is replaced with another amino acid or in which the amino acid corresponding to position 56 and the amino acid corresponding to position 52 in the amino acid sequence of SEQ ID NO: 3 are replaced with another amino acid. Invention also relates to a method of producing branched-chain L-amino acids, comprising a step of culturing a microorganism containing said version of acetate metabolism regulator A.
EFFECT: invention enables to obtain branched-chain L-amino acids with high efficiency.
13 cl, 7 tbl, 3 ex
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