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    • 12. 发明授权
    • Oxidatively stable alpha-amylase
    • 氧化稳定的α-淀粉酶
    • US06297037B1
    • 2001-10-02
    • US08194664
    • 1994-02-10
    • Christopher C. BarnettColin MitchinsonScott D. PowerCarol A. Requadt
    • Christopher C. BarnettColin MitchinsonScott D. PowerCarol A. Requadt
    • C12N928
    • C12N9/2417C11D3/386C12N15/75C12P19/14
    • Novel alpha-amylase mutants derived from the DNA sequences of naturally occurring or recombinant alpha-amylases are disclosed. The mutant alpha-amylases, in general, are obtained by in vitro modifications of a precursor DNA sequence encoding the naturally occurring or recombinant alpha-amylase to generate the substitution (replacement) or deletion of one or more oxidizable amino acid residues in the amino acid sequence of a precursor alpha-amylase. Such mutant alpha-amylases have altered oxidative stability and/or altered pH performance profiles and/or altered thermal stability as compared to the precursor. Also disclosed are detergent and starch liquefaction compositions comprising the mutant amylases, as well as methods of using the mutant amylases.
    • 公开了衍生自天然存在或重组α-淀粉酶的DNA序列的新型α-淀粉酶突变体。 通常,通过体外修饰编码天然存在或重组α-淀粉酶的前体DNA序列以产生氨基酸中一个或多个可氧化氨基酸残基的取代(置换)或缺失,获得突变体α-淀粉酶 前体α-淀粉酶的序列。 与前体相比,这种突变型α-淀粉酶具有改变的氧化稳定性和/或改变的pH性能特征和/或改变的热稳定性。 还公开了包含突变淀粉酶的洗涤剂和淀粉液化组合物,以及使用突变淀粉酶的方法。