FIELD: biotechnology.
SUBSTANCE: invention relates to biotechnology and is an isocitrate dehydrogenase kinase/phosphatase consisting of the amino acid sequence represented by SEQ ID NO: 1, in which glutamic acid, which is the amino acid corresponding to position 26 in SEQ ID NO: 3, is replaced by lysine. The invention also relates to a microorganism containing a polynucleotide encoding the isocitrate dehydrogenase kinase/phosphatase according to the invention, used for the production of L-tryptophan.
EFFECT: increasing the yield of L-tryptophan.
5 cl, 1 tbl, 2 ex
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