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    • 3. 发明申请
    • MICROORGANISM FOUND IN THE CORYNEBACTERIUM GENUS HAVING ENHANCED L-ORNITHINE PRODUCTION AND METHOD FOR PREPARING L-ORNITHINE USING SAME
    • 在具有增强的L-选择素生产的CORYNBACTERIUM基因中发现的微生物和使用它们制备L-ORNITH的方法
    • WO2012161522A2
    • 2012-11-29
    • PCT/KR2012004089
    • 2012-05-23
    • GANGWON TECHNOLOGY HOLDINGS CO LTDCHO JAE YONGKO YOUNG WOONG
    • CHO JAE YONGKO YOUNG WOONG
    • C12N1/21C12N15/77C12P13/10C12R1/15
    • C12N9/0006C12P13/10C12Y101/9901
    • The present invention relates to a microorganism found in the corynebacterium genus having enhanced L-ornithine production, and to a method for preparing L-ornithine using same. More particularly, the present invention relates to a microorganism found in the corynebacterium genus in which intrinsic glucose dehydrogenase (GDH) activity is reduced or becomes inert, thus enhancing L-ornithine production. The present invention also relates to a method for preparing said microorganism, and to a method for preparing L-ornithine, comprising the steps of: culturing said microorganism using glucose as a carbon source; and recovering L-ornithine from said culture. Using the microorganism found in the corynebacterium genus of the present invention in which intrinsic glucose dehydrogenase enzyme activity is reduced, not only is a pentose phosphate pathway activated but also the specific activities of G6PDH and 6PGD, which are enzymes related to the pentose phosphate pathway, are increased to improve NADPH production yields, thus increasing L-ornithine production yields using said NADPH. Therefore, the microorganism of the present invention may be widely utilized in the efficient and economical production of L-ornithine.
    • 本发明涉及具有增强的L-鸟氨酸生产的棒状杆菌属中发现的微生物以及使用其制备L-鸟氨酸的方法。 更具体地说,本发明涉及其中内源性葡萄糖脱氢酶(GDH)活性降低或变成惰性的棒状杆菌属中发现的微生物,从而增强L-鸟氨酸生产。 本发明还涉及一种制备所述微生物的方法和L-鸟氨酸的制备方法,包括以下步骤:使用葡萄糖作为碳源培养所述微生物; 并从所述文化中回收L-鸟氨酸。 使用其中内在葡萄糖脱氢酶活性降低的本发明的棒状杆菌属中发现的微生物不仅活化戊糖磷酸途径,而且与作为与戊糖磷酸途径相关的酶的G6PDH和6PGD的比活性, 增加NADPH生产产率,从而增加使用所述NADPH的L-鸟氨酸产量。 因此,本发明的微生物可以广泛地用于L-鸟氨酸的有效和经济的生产。
    • 10. 发明申请
    • tdcBC/pckA GENE-INACTIVATED MICROORGANISM AND METHOD OF PRODUCING L-THREONINE USING THE SAME
    • tdcBC / pckA基因灭活微生物及使用其生产L-苏氨酸的方法
    • WO2004087895A1
    • 2004-10-14
    • PCT/KR2004/000778
    • 2004-04-02
    • CJ CORP.PARK, Young HoonLEE, Byoung ChoonKIM, Dae CheolLEE, Jin HoCHO, Jae Yong
    • PARK, Young HoonLEE, Byoung ChoonKIM, Dae CheolLEE, Jin HoCHO, Jae Yong
    • C12N1/21
    • C12P13/08C12N9/88
    • Disclosed is a microorganism including both tdcBC and pckA genes inactivated on chromosome, which has remarkably improved productivity of L-thionine due to the inactivation of the two genes. Also, the present invention discloses a method of producing L-threonine using the microorganism. The microorganism is prepared by incorporating by a recombination technique an antibiotic resistance gene into a pckA gene on the chromosome of a bacterial strain containing an L-threonine degradation-associated operon gene, tdcBC, which is inactivated. The microorganism has the effect of preventing degradation and intracellular influx of L-threonine due to the inactivation of the tdcBC operon gene, and includes more activated pathways for L-threonine biosynthesis. Therefore, the microorganism is useful for mass production of L-threonine because of being capable of producing L-threonine in high levels and high yields even in the presence of high concentrations of glucose.
    • 公开了一种微生物,其包括在染色体上灭活的tdcBC和pckA基因,由于两种基因的失活,其显着提高了L-硫素的生产力。 此外,本发明公开了使用该微生物生产L-苏氨酸的方法。 通过重组技术将抗生素抗性基因并入包含失活的L-苏氨酸降解相关操纵子基因tdcBC的细菌菌株的染色体上的pckA基因中来制备微生物。 该微生物具有防止由于tdcBC操纵子基因失活引起的L-苏氨酸的降解和细胞内流入的作用,并且包括用于L-苏氨酸生物合成的更多活化途径。 因此,即使在高浓度葡萄糖的存在下,微生物也能够以高水平和高产率生产L-苏氨酸,因此可用于批量生产L-苏氨酸。