Methods for the stereospecific and enantiomeric enrichment of beta-amino acids
    1.
    发明申请
    Methods for the stereospecific and enantiomeric enrichment of beta-amino acids 审中-公开
    β-氨基酸立体定向和对映体富集的方法

    公开(公告)号:US20050009151A1

    公开(公告)日:2005-01-13

    申请号:US10875161

    申请日:2004-06-22

    摘要: The present invention relates to methods for the stereospecific synthesis and for the enantiomeric enrichment of β-amino acids. A novel D-β-aminotransferase, which exhibits stereoselectivity for D-β-phenylalanine, (D-3 amino-3-phenylpropinine acid) was purified from a newly-isolated strain of Variouorax paradoxus. A novel L-β-aminotransferase was purified from a newly-isolated strain of Alcaligenes eutrophus. The D- and L-β-aminotransferases can be used to facilitate the stereoselective biosynthesis of β-D-phenylalanine or β-L-phenylalanine, from a mixture of L-glutamic acid or L-alanine, respectively, and 3-keto-3-phenylpropionic acid in the presence of the cofactor pyridoxal phosphate.

    摘要翻译: 本发明涉及立体有择合成和β-氨基酸对映异构体富集的方法。 从新分离的Variouorax paradoxus菌株中纯化出具有D-β-苯丙氨酸立体选择性的新型D-β-氨基转移酶(D-3氨基-3-苯丙酸)。 从新分离的产碱杆菌菌株纯化出新的L-β-氨基转移酶。 D-和L--β-氨基转移酶可用于促进分别由L-谷氨酸或L-丙氨酸的混合物和3-酮基 - 苯丙氨酸的β-苯丙氨酸或β-L-苯丙氨酸的立体选择性生物合成, 在辅因子吡哆醛磷酸盐存在下,加入3-苯基丙酸。