Conversion of hexuronic acid to hexaric acid
    25.
    发明授权
    Conversion of hexuronic acid to hexaric acid 有权
    己糖醛酸转化为己酸

    公开(公告)号:US08895273B2

    公开(公告)日:2014-11-25

    申请号:US13141736

    申请日:2009-12-22

    CPC分类号: C12P7/44 C12N9/0006 C12P7/58

    摘要: The present invention relates to a method and microbial host strain for converting a hexuronic acid to a hexaric acid. In particular, the invention relates to the conversion of D-galacturonic acid to meso-galactaric acid (mucic acid). The invention also concerns an isolated nucleotide sequence. According to the present method a microbial host strain genetically modified to express uronate dehydrogenase enzyme (EC 1.1.1.203) is contacted with a biomaterial comprising hexuronic acid and the conversion products are recovered. By using the recombinant microorganisms of the present invention it is possible to treat biomaterials comprising hexuronic acids and thereby decrease the amount of hexuronic acids released to the environment.

    摘要翻译: 本发明涉及一种将己糖醛酸转化为六酸的方法和微生物宿主菌株。 特别地,本发明涉及D-半乳糖醛酸转化为内消旋半乳糖酸(粘酸)。 本发明还涉及分离的核苷酸序列。 根据本方法,将遗传修饰以表达糖醛酸脱氢酶(EC 1.1.1.203)的微生物宿主菌与包含己糖醛酸的生物材料接触,并回收转化产物。 通过使用本发明的重组微生物,可以处理包含己糖醛酸的生物材料,从而减少释放到环境中的己糖醛酸的量。

    MICROBIAL CONVERSION OF SUGAR ACIDS AND MEANS THEREIN
    27.
    发明申请
    MICROBIAL CONVERSION OF SUGAR ACIDS AND MEANS THEREIN 审中-公开
    糖类的微生物转化及其意义

    公开(公告)号:US20080176300A1

    公开(公告)日:2008-07-24

    申请号:US11947023

    申请日:2007-11-29

    摘要: A DNA molecule comprising a fungal gene encoding an enzyme protein capable of converting L-galactonic acid into L-threo-3-deoxy-hexulosonic acid has been cloned and heterologously expressed. The enzyme is involved in the metabolic conversion of sugar acids, which are present in biological waste material such as sugar beet pulp and other pectin comprising material. A microorganism genetically modified to effectively express said enzyme may be used in fermenting biomaterial to desired end products such as ethanol. Alternatively, microorganisms in which the gene has been inactivated may be used to produce L-galactonic acid, which accumulates when the expression of the gene is prevented.

    摘要翻译: 包含编码能够将L-半乳糖转化为L-苏式-3-脱氧 - 六酮酸的酶蛋白的真菌基因的DNA分子已被克隆并异源表达。 该酶参与糖酸的代谢转化,其存在于生物废物如糖用甜菜浆和其它果胶包含材料中。 遗传修饰以有效表达所述酶的微生物可用于将生物材料发酵至期望的最终产物如乙醇。 或者,其中基因已经失活的微生物可以用于产生L-半乳糖酸,当预防基因的表达时它们积聚。