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    • 1. 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。