Method for microbially producing L-valine
    23.
    发明授权
    Method for microbially producing L-valine 失效
    微生物生产L-缬氨酸的方法

    公开(公告)号:US07632663B1

    公开(公告)日:2009-12-15

    申请号:US09914006

    申请日:2000-02-21

    摘要: The present invention relates to a process for the microbial production of L-valine in which the dihydroxy acid-synthase (ilvD) activity and/or the ilvD gene expression is intensified in a microorganism. As an alternative or in combination with this, the acetohydroxy acid-synthase (ilvBN) activity and isomeroreductase (ilvC) activity and/or the ilvBNC gene expression are intensified in a microorganism. The process according to the invention preferably makes use of microorganisms in which the activity of at least one enzyme that is involved in a metabolic pathway that reduces the formation of L-valine is weakened or eliminated. Thus, for instance, the process according to the invention preferably makes use of microorganisms having a defect mutation in the threonine dehydratase (ilvA) gene and/or a defect mutation in one or more genes of the pantothenate synthesis.

    摘要翻译: 本发明涉及微生物生产L-缬氨酸的方法,其中二羟基酸合酶(ilvD)活性和/或ilvD基因表达在微生物中增强。 作为替代或与其结合,在微生物中增强乙酰羟酸合酶(ilvBN)活性和异构还原酶(ilvC)活性和/或ilvBNC基因表达。 根据本发明的方法优选利用其中减少或消除了减少L-缬氨酸形成的参与代谢途径的至少一种酶的活性的微生物。 因此,例如,根据本发明的方法优选利用在苏氨酸脱水酶(ilvA)基因中具有缺陷突变的微生物和/或泛酸合成的一种或多种基因中的缺陷突变。