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POLYPEPTIDE HAVING PHYTASE ACTIVITY AND INCREASED TEMPERATURE RESISTANCE OF THE ENZYME ACTIVITY, AND NUCLEOTIDE SEQUENCE CODING SAID POLYPEPTIDE
POLYPEPTIDE HAVING PHYTASE ACTIVITY AND INCREASED TEMPERATURE RESISTANCE OF THE ENZYME ACTIVITY, AND NUCLEOTIDE SEQUENCE CODING SAID POLYPEPTIDE
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机译:具有植酸酶活性的多肽和酶活性的耐温性提高的多肽,以及编码所述多肽的核苷酸序列
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摘要
Recombinant DNA (I) coding for a phytase polypeptide has a sequence coding for the mature wild-type Escherichia coli phytase with at least one of the following variations (i) a K74D mutation, (ii) a combination of N139R and D142E mutations, (iii) a combination of L145I and L198I mutations, (iv) a V200P mutation and (v) N- and/or C-terminal attachment of an Aspergillus niger acid phosphatase or phytase sequence fragment, where variations (iii) and (iv) can only be present in combination with variation (i), (ii) and/or (v). Independent claims are also included for: (1) phytase polypeptide (II) encoded by (I); (2) DNA construct comprising an optional promoter, optional signal and marker sequences, (I), a terminator and optional 5' and 3' flanking sequences; (3) vector comprising a construct as above; (4) transformed fungal, yeast, bacterial or mammalian cell containing (I); (5) producing (II) by culturing a transformed cell as above; (6) composition comprising (II).
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