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    • 4. 发明申请
    • MATERIALS AND METHODS FOR BIOSYNTHESIS OF SERINE AND SERINE-RELATED PRODUCTS
    • 丝氨酸和丝氨酸相关产品的生物化学的材料和方法
    • WO1993012235A1
    • 1993-06-24
    • PCT/EP1992001873
    • 1992-08-17
    • WACKER-CHEMIE GMBHBURLINGAME, Richard, P.
    • WACKER-CHEMIE GMBH
    • C12N15/53
    • C12N9/0006C12P13/06
    • DNA encoding 3-phosphoglycerate dehydrogenase (PGD) with reduced sensitivity to inhibition by serine in comparison to wild-type PGD - i.e., the DNA encodes PGD which has at least some level of enzymatic activity useful for biosynthesis, and which retains that activity at higher serine levels than does the (unmodified) wild-type PGD. Also disclosed are: a) PGD having the amino acid sequence of the above-described engineered DNA; b) expression vectors comprising the engineered DNA and regulatory DNA positioned and oriented for expression of the engineered DNA in a host expression system; c) cells comprising such expression vectors; and d) methods for producing serine or a serine-derived product by culturing such cells.
    • 与野生型PGD相比,编码3-磷酸甘油酸脱氢酶(PGD)的DNA具有降低的对丝氨酸抑制的敏感性,即DNA编码具有至少一些可用于生物合成的酶活性水平的PGD,并且其保留该活性在较高 丝氨酸水平高于(未经修饰)野生型PGD。 还公开了:a)具有上述工程DNA的氨基酸序列的PGD; b)包含工程化DNA和调节DNA的表达载体,其定位并定向以在宿主表达系统中表达工程化的DNA; c)包含这种表达载体的细胞; 和d)通过培养这些细胞产生丝氨酸或丝氨酸衍生产物的方法。