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    • 3. 发明专利
    • 4-keto-d-arabonic acid, 4-keto-d-arabinose, and production method of the same
    • 4-KETO-D-阿拉伯酸,4-KETO-D-ARABINOSE及其生产方法
    • JP2012131765A
    • 2012-07-12
    • JP2011042459
    • 2011-02-28
    • Yamaguchi Univ国立大学法人山口大学
    • ADACHI KAZUOYAKUSHI HISAHARUMATSUSHITA KAZUNOBUROQUE ALBERTO HOURS
    • C07C49/185C07C59/215C12N1/20C12P7/42
    • PROBLEM TO BE SOLVED: To provide 4-keto-D-arabonic acid as a novel compound and its production method, and 4-keto-D-arabinose and its production method, which is the intermediate product of 4-keto-D-arabonic acid.SOLUTION: By cultivating 4-keto-D-arabonic acid-producing bacteria belonging to Gluconacetobacter or Gluconobacter, for example, cultivating Gluconacetobacter liquefaciens having ability of producing 4-keto-D-arabonic acid, in a cultivation medium containing D-glucose, D-gluconic acid or 2-keto-D-gluconic acid, 2,5-diketo-D-gluocnic acid (25DKA) is produced as a metabolite, which is further metabolized to produce 4-keto-D-arabonic acid. After isolating washed cells or a cytoplasmic membrane fraction of the Gluconacetobacter liquefaciens, when the washed cells or the cytoplasmic membrane fraction is made to react with 25DKA, not only 4-keto-D-arabonic acid but 4-keto-D-arabinose that is an intermediate product of 4-keto-D-arabonic acid can be produced.
    • 待解决的问题:提供作为新型化合物的4-酮-D-阿拉伯酸及其制备方法和4-酮-D-阿拉伯糖及其制备方法,其为4-酮 - D-阿拉伯酸。 解决方案:通过培养属于葡糖乙酸杆菌属或葡萄糖酸杆菌属的4-酮-L-阿拉伯酸生产菌,例如培养含有D-酮酸葡萄糖醛酸的培养基中培养具有产生4-酮基-D-阿拉伯糖酸的能力的葡糖型醋酸杆菌属, 葡萄糖,D-葡萄糖酸或2-酮-D-葡糖酸,2,5-二酮-D-葡萄糖酸(25DKA)作为代谢产物,进一步被代谢以产生4-酮-D-阿糖酸。 在分离洗涤的细胞或液化葡糖醋酸杆菌的细胞质膜级分后,当洗涤的细胞或细胞质膜级分与25DKA反应时,不仅4-酮-D-阿拉伯糖,而且是4-酮-D-阿拉伯糖 可以制备4-酮-L-阿拉伯酸的中间产物。 版权所有(C)2012,JPO&INPIT
    • 6. 发明专利
    • Gene defect method acetic acid bacterium not inserted with exogenous dna
    • 基因缺陷方法不含有外源DNA的乙酸细菌
    • JP2012125164A
    • 2012-07-05
    • JP2010277477
    • 2010-12-13
    • Yamaguchi Univ国立大学法人山口大学
    • YAKUSHI HISAHARUFUJII MASAKOMATSUSHITA KAZUNOBU
    • C12N15/09C12N1/19
    • PROBLEM TO BE SOLVED: To provide a method for making gene defect acetic acid bacteria capable of more highly effectively obtaining the gene defect acetic acid bacteria made without inserting the exogenous DNA to the genome DNA of the acetic acid bactera.SOLUTION: The method includes a step (a) for preparing a DNA segment including a sequence in which a target gene or homologous sequences of two areas sandwiching a part of the same are tandemly coupled for deleting the target gene in the acetic acid bacterium genome, a step (b) for preparing a cyclic DNA by introducing the DNA segment into a vector having a drug resistant gene and a marker gene and not having a replication starting point of the acetic acid bacteria, a step (c) for introducing the cyclic DNA into the acetic bacteria having the target gene, a step (d) for selecting by culturing the acetic acid bacteria in which the cyclic DNA whole length is assembled into the acetic acid genom by homologous recombination of the acetic acid bacteria to which the cyclic DNA is introduced by a culture medium containing drug corresponding to the drug resistant gene, and a step (e) for culturing the acetic acid bacteria provided with the drug resistance selected by the step (d) by a culture medium not containing the drug.
    • 要解决的问题:提供一种能够更加有效地获得不将外源DNA插入到乙酸菌的基因组DNA中而制备的基因缺陷型乙酸菌的基因缺陷型乙酸菌的方法。 解决方案:该方法包括步骤(a),用于制备DNA片段,其包括其中靶基因或夹带其部分部分的两个区域的同源序列串联耦合的序列,以删除乙酸中的靶基因 细菌基因组,通过将DNA片段导入具有耐药性基因的载体和标记基因而不具有乙酸菌的复制起始点的步骤(b),用于引入环状DNA的步骤(b) 循环DNA进入具有靶基因的乙酸菌中,步骤(d)通过将其中将全长DNA整合到乙酸基因组中的乙酸菌通过将乙酸菌的同源重组 通过含有与药物抗性基因相对应的药物的培养基导入环状DNA,和(e)培养具有步骤(d)选择的耐药性的乙酸菌的培养物 不含药物的介质。 版权所有(C)2012,JPO&INPIT