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    • 8. 发明公开
    • PROCESS FOR PRODUCTION OF L-AMINO ACID
    • 生产L-氨基酸的方法
    • EP1900821A1
    • 2008-03-19
    • EP06756916.0
    • 2006-06-02
    • DAICEL CHEMICAL INDUSTRIES, LTD.
    • KIMOTO, NorihiroYAMAMOTO, HiroakiHAYASHI, Motoko
    • C12P13/04C12N15/09C12N1/15C12N1/19C12N1/21C12N5/10C12R1/01C12R1/07C12R1/19C12R1/645C12R1/72
    • C12N9/1096C12N9/0014C12N9/0016C12N9/0024C12P13/04C12P41/001C12P41/002
    • Disclosed is a process for producing the L-form of an amino acid enzymatically from an enantiomeric mixture of the amino acid. The process includes the step of contacting a transformant or a treated product thereof with an enantiomeric mixture of the amino acid. The transformant includes a single host and one or more recombinant vectors introduced thereinto, in which the one or more recombinant vectors include one or more expression vectors and nucleotide sequences integrated thereinto respectively, and the nucleotide sequences are a nucleotide sequence encoding an enzyme capable of converting the D-form of an amino acid into a keto acid and a nucleotide sequence encoding an enzyme capable of converting a keto acid into the L-form of an amino acid. According to this process, a reaction for converting the D-form of an amino acid into a keto acid and a reaction for converting the keto acid into the L-form of the amino acid can be conducted in a single step. Disclosed also is a transformant capable of converting into the L-form of an amino acid as accumulated in a high concentration. The L-form of an amino acid can be efficiently produced from an inexpensive starting material by using the transformant.
    • 公开了一种从氨基酸的对映体混合物中酶促生产L-型氨基酸的方法。 该方法包括使转化体或其处理产物与氨基酸的对映体混合物接触的步骤。 转化体包括单个宿主和导入其中的一种或多种重组载体,其中所述一种或多种重组载体分别包含一种或多种表达载体和核苷酸序列,并且所述核苷酸序列是编码能够转化 将D-型氨基酸转化为酮酸和编码能够将酮酸转化为L-型氨基酸的酶的核苷酸序列。 根据该方法,将氨基酸的D-型转化为酮酸的反应和将酮酸转化为L-型的氨基酸的反应可以一步进行。 还公开了能够以高浓度积累的形式转化成L-型氨基酸的转化体。 通过使用转化体,可以从廉价的原料高效地生产L-型氨基酸。