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    • 5. 发明授权
    • Mutant YqhD enzyme for the production of a biochemical by fermentation
    • 用于通过发酵生产生化的突变型YqhD酶
    • US08969053B2
    • 2015-03-03
    • US13387347
    • 2010-07-30
    • François VoelkerLaurence Dumon-SeignovertPhilippe Soucaille
    • François VoelkerLaurence Dumon-SeignovertPhilippe Soucaille
    • C12P7/26C12P1/00C12N9/04C12N9/88C12P7/18
    • C12P7/26C12N9/0006C12N9/88C12P7/18C12Y101/01002C12Y101/01006C12Y402/03003
    • The present invention concerns a method for the production of a biochemical selected among acetol and 1,2-propanediol, 1,3-propanediol, ethylene glycol and 1,4-butanediol comprising culturing a microorganism modified for an improved production of the biochemical selected among acetol and 1,2-propanediol, 1,3-propanediol, ethylene glycol and 1,4-butanediol in an appropriate culture medium and recovery of the desired biochemical which may be further purified wherein the microorganism expresses a YqhD enzyme which catalytic efficiency toward NADPH is increased.The present invention also relates to a mutant YqhD enzyme comprising at least one amino acid residue in the protein sequence of the parent enzyme replaced by a different amino acid residue at the same position wherein the mutant enzyme has retained more than 50% of the YqhD activity of the parent enzyme and the catalytic efficiency toward NADPH of the mutant YqhD is increased as compared with the catalytic efficiency toward NADPH of the parent enzyme.
    • 本发明涉及一种选自丙酮醇和1,2-丙二醇,1,3-丙二醇,乙二醇和1,4-丁二醇的生物化学生产方法,该方法包括培养一种改良生物化学生物的微生物, 丙酮醇和1,2-丙二醇,1,3-丙二醇,乙二醇和1,4-丁二醇,并回收可以进一步纯化的所需生化物,其中微生物表达YqhD酶,其对NADPH的催化效率 增加了。 本发明还涉及包含在相同位置的不同氨基酸残基替代的母体酶的蛋白质序列中的至少一个氨基酸残基的突变型YqhD酶,其中突变酶保留了超过50%的YqhD活性 的亲代酶的催化效率和与NADPH的亲和酶的催化效率相比,突变型YqhD的NADPH的催化效率增加。