FIELD: chemistry.
SUBSTANCE: invention relates to biotechnology and provides an improved version of parent AmyTS23 alpha-amylase having the sequence SEQ ID NO:1, having alpha-amylase activity. Said version has a truncation of the C-end and an amino acid sequence with at least 90% identity to the sequence SEQ ID NO:2, and contains a S243Q mutation and a deletion of residues R180 and S181, where the numbering of said amino acid residues is presented relative to SEQ ID NO:1.
EFFECT: invention widens the range of alpha-amylases which are suitable for use in detergent compositions and when processing starch.
15 cl, 14 dwg, 7 tbl, 11 ex
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