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    • 2. 发明授权
    • Evolved micro-organisms for the production of 1,2-propanediol
    • 用于生产1,2-丙二醇的进化微生物
    • US08252579B2
    • 2012-08-28
    • US10585040
    • 2005-01-12
    • Isabelle Meynial-SallesBenjamin GonzalezPhilippe Soucaille
    • Isabelle Meynial-SallesBenjamin GonzalezPhilippe Soucaille
    • C12Q1/68C12P7/02C12N1/20C12N9/00C12N9/02C12N9/04C12N15/00C07H21/04
    • C12P7/18C12N9/0051C12N15/01C12P7/28
    • The present invention concerns a new method of preparation of a strain of evolved micro-organisms for the production of 1,2-propanediol by the metabolism of a simple carbon source, which method comprises the growth under selection pressure in an appropriate growth medium containing a simple carbon source of an initial bacterial strain that has undergone the deletion of the gene tpiA and the deletion of at least one gene involved in the conversion of methylglyoxal (propanal) into lactate, in order to cause, in said initial strain, the evolution of one or more genes involved in the biosynthesis pathway from DHAP to methylglyoxal and then to 1,2-propanediol towards evolved genes that possess an improved “1,2-propanediol synthase activity”, the resulting strain or strains of evolved micro-organisms possessing an improved “1,2-propanediol synthase activity” then being selected and isolated.The invention also concerns the initial micro-organisms and the evolved micro-organisms thus obtained, and a method for the preparation of 1,2-propanediol and possibly acetone by culture of said evolved micro-organisms.
    • 本发明涉及通过简单碳源的代谢来制备用于生产1,2-丙二醇的进化微生物菌株的新方法,该方法包括在选择压力下在合适的生长培养基中生长,所述合适的生长培养基含有 已经经历基因tpiA缺失的初始细菌菌株的简单碳源和涉及将甲基乙二醛(丙醛)转化成乳酸盐的至少一个基因的缺失,以便在所述初始菌株中引起 涉及从DHAP到甲基乙二醛然后到1,2-丙二醇的生物合成途径中的一个或多个基因转化为具有改进的“1,2-丙二醇合酶活性”的进化基因,所得的产生的菌株或进化微生物菌株具有 然后选择和分离改进的“1,2-丙二醇合酶活性”。 本发明还涉及由此获得的初始微生物和进化微生物,以及通过培养所述进化微生物制备1,2-丙二醇和可能的丙酮的方法。
    • 3. 发明申请
    • Evolved micro-organisms for the production of 1,2-propanediol
    • 用于生产1,2-丙二醇的进化微生物
    • US20070072279A1
    • 2007-03-29
    • US10585040
    • 2005-01-12
    • Isabelle Meynial-SallesBenjamin GonzalezPhilippe Soucaille
    • Isabelle Meynial-SallesBenjamin GonzalezPhilippe Soucaille
    • C12P7/18C12N15/74C12N1/21
    • C12P7/18C12N9/0051C12N15/01C12P7/28
    • The present invention concerns a new method of preparation of a strain of evolved micro-organisms for the production of 1,2-propanediol by the metabolism of a simple carbon source, which method comprises the growth under selection pressure in an appropriate growth medium containing a simple carbon source of an initial bacterial strain that has undergone the deletion of the gene tpiA and the deletion of at least one gene involved in the conversion of methylglyoxal (propanal) into lactate, in order to cause, in said initial strain, the evolution of one or more genes involved in the biosynthesis pathway from DHAP to methylglyoxal and then to 1,2-propanediol towards evolved genes that possess an improved “1,2-propanediol synthase activity”, the resulting strain or strains of evolved micro-organisms possessing an improved “1,2-propanediol synthase activity” then being selected and isolated. The invention also concerns the initial micro-organisms and the evolved micro-organisms thus obtained, and a method for the preparation of 1,2-propanediol and possibly acetone by culture of said evolved micro-organisms.
    • 本发明涉及通过简单碳源的代谢来制备用于生产1,2-丙二醇的进化微生物菌株的新方法,该方法包括在选择压力下在合适的生长培养基中生长,所述合适的生长培养基含有 已经经历基因tpiA缺失的初始细菌菌株的简单碳源和涉及将甲基乙二醛(丙醛)转化成乳酸盐的至少一个基因的缺失,以便在所述初始菌株中引起 涉及从DHAP到甲基乙二醛然后到1,2-丙二醇的生物合成途径中的一个或多个基因转化为具有改进的“1,2-丙二醇合酶活性”的进化基因,所得的产生的菌株或进化微生物菌株具有 然后选择和分离改进的“1,2-丙二醇合酶活性”。 本发明还涉及由此获得的初始微生物和进化微生物,以及通过培养所述进化微生物制备1,2-丙二醇和可能的丙酮的方法。
    • 5. 发明授权
    • Mutant glycerol dehydrogenase (GlyDH) for the production of a biochemical by fermentation
    • 突变型甘油脱氢酶(GlyDH)用于通过发酵生产生化
    • US08980604B2
    • 2015-03-17
    • US13387337
    • 2010-07-30
    • Francois VoelkerLaurence Dumon-SeignovertIsabelle Meynial-SallesPhilippe Soucaille
    • Francois VoelkerLaurence Dumon-SeignovertIsabelle Meynial-SallesPhilippe Soucaille
    • C12N9/04C12N15/09C12P7/18A61K38/00
    • C12P7/18C12N9/0006
    • The present invention concerns a method for the production of 1,2-propanediol, comprising culturing a microorganism modified for an improved production of 1,2-propanediol in an appropriate culture medium and recovery of the 1,2-propanediol which may be further purified wherein the microorganism expresses a glycerol dehydrogenase (GlyDH) enzyme the inhibition of which activity by NAD+ and/or its substrate and/or its product is reduced.The present invention also relates to a mutant glycerol dehydrogenase (GlyDH) comprising at least one amino acid residue in the protein sequence of the parent enzyme replaced by a different amino acid residue at the same position wherein the mutant enzyme has retained more than 50% of the glycerol dehydrogenase activity of the parent enzyme and the glycerol dehydrogenase activity of the mutant GlyDH is less inhibited by NAD+ and/or by its substrate as compared to the parent enzyme and/or by its product as compared to the parent enzyme.
    • 本发明涉及一种生产1,2-丙二醇的方法,包括在合适的培养基中培养改良生产1,2-丙二醇的微生物,并回收可进一步纯化的1,2-丙二醇 其中所述微生物表达甘油脱氢酶(GlyDH)酶,所述NAD +和/或其底物和/或其产物的活性的抑制被降低。 本发明还涉及一种突变体甘油脱氢酶(GlyDH),其包含在相同位置的不同氨基酸残基所代替的母体酶的蛋白质序列中的至少一个氨基酸残基,其中突变酶保留超过50% 与亲本酶相比,与亲本酶和/或其产物相比,母体酶的甘油脱氢酶活性和突变体GlyDH的甘油脱氢酶活性被NAD +和/或其底物抑制较少。