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    • 26. 发明申请
    • Method of preparing 2-deoxyribose 5-phosphate
    • 2-脱氧核糖5-磷酸的制备方法
    • US20070298467A1
    • 2007-12-27
    • US11878553
    • 2007-07-25
    • Sakayu ShimizuJun Ogawa
    • Sakayu ShimizuJun Ogawa
    • C12P19/02
    • C12R1/22C12N9/88C12N9/90C12P19/02
    • The present invention discloses a method of preparing 2-deoxyribose 5-phosphate by reacting glyceraldehyde 3-phosphate and acetaldehyde in the presence of either a microorganism itself which contains 2-deoxyribose-5-phosphate aldolase but substantially no phosphatase or the enzyme derived from the microorganism. The present invention also discloses a method of preparing 2-deoxyribose 5-phosphate by reacting dihydroxyacetone phosphate and acetaldehyde in the presence of either a microorganism itself which contains 2-deoxyribose-5-phosphate aldolase and triose-phosphate isomerase but substantially no phosphatase or the enzymes derived from the microorganism.
    • 本发明公开了一种在含有2-脱氧核糖-5-磷酸醛缩酶但基本上不含磷酸酶的微生物本身存在下使甘油醛-3-磷酸和乙醛反应制备2-脱氧核糖-5-磷酸的方法, 微生物。 本发明还公开了在含有2-脱氧核糖-5-磷酸醛缩酶和丙糖磷酸异构酶但基本上不含磷酸酶的微生物本身的存在下使磷酸二羟丙酮和乙醛反应制备2-脱氧核糖-5-磷酸的方法,或者 源于微生物的酶。
    • 28. 发明申请
    • Process for producing lactonase and utilization thereof
    • 生产内酯酶的方法及其利用
    • US20070134775A1
    • 2007-06-14
    • US10547424
    • 2004-03-03
    • Sakayu ShimizuMichihiko KataokaKeiji Sakamoto
    • Sakayu ShimizuMichihiko KataokaKeiji Sakamoto
    • C12P17/06C12N9/16C12N1/18
    • C12P41/003C12N9/18C12P17/04
    • It has been required to economically produce a large amount of optically active γ-lactone derivatives (for example, pantolactone), which are useful as intermediates in synthesizing useful substances such as pharmaceutical drugs. To achieve this object, it is advantageous to employ an enzymatic technique of asymmetric hydrolysis with a hydrolyzing enzyme lactonase. However, it remains troublesome to prepare the enzyme or utilize a microorganism capable of producing the enzyme. Also, it is difficult to obtain a sufficient and stable enzymatic activity in the case of using recombination techniques. In producing lactonase, which asymmetrically hydrolyzes a γ-lactone derivative such as racemic pantolactone selectively, by a recombination technique, both mature lactonase DNA and signal peptide region DNA are transferred into a host. Thus, a stable lactonase activity comparable to naturally-occurring one can be achieved and a transformant sustaining a high enzyme activity in a stable manner can be acquired, thereby allowing the efficient and industrially advantageous asymmetric synthesis of γ-lactone derivatives.
    • 需要经济地生产大量的用作合成有用物质如药物的中间体的光学活性γ-内酯衍生物(例如泛酸内酯)。 为了达到这个目的,使用水解酶内酯酶的不对称水解酶技术是有利的。 然而,制备酶或利用能够产生酶的微生物仍然是麻烦的。 此外,在使用重组技术的情况下,难以获得足够稳定的酶活性。 在制备内含子选择性地水解γ-内酯衍生物如外消旋泛酸内酯的内切酶中,通过重组技术,将成熟内含酶DNA和信号肽区DNA两者转移到宿主中。 因此,可以获得与天然存在的活性相当的稳定的内含酶活性,并且可以获得以稳定的方式维持高酶活性的转化体,从而允许有效和工业上有利的γ-内酯衍生物的不对称合成。