FIELD: biotechnology.
SUBSTANCE: invention relates to biotechnology. Deoxyguanosine triphosphate triphosphohydrolase consisting of an amino acid sequence represented by SEQ ID NO: 1 is proposed. A polynucleotide encoding the specified deoxyguanosine triphosphate triphosphohydrolase, a microorganism Escherichia coli that produces L-tryptophan and contains the specified deoxyguanosine triphosphate triphosphohydrolase or a polynucleotide encoding the specified deoxyguanosine triphosphate triphosphohydrolase, and a method for producing L-tryptophan are also proposed.
EFFECT: invention makes it possible to increase the yield of L-tryptophan.
4 cl, 1 tbl, 2 ex
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