An L-threonine-producing Escherichia coli in which a promoter of a phosphoenolpyruvate carboxylase (ppc) gene on the chromosome is substituted with a promoter of a cysteine synthase (cysk) gene and a method of producing L-threonine by using the same are disclosed. The recombinant Escherichia coli may produce L-threonine in a high yield, and thus may be widely used in medical, pharmaceutical, and feed industries, particularly for an animal feed.
本发明公开了一种将染色体上
磷酸烯醇
丙酮酸羧化酶(ppc)
基因的启动子替换为半胱
氨酸合成酶(cysk)
基因的启动子的生产
L-苏氨酸的大肠杆菌,以及利用这种大肠杆菌生产
L-苏氨酸的方法。
重组大肠杆菌可高产
L-苏氨酸,因此可广泛用于医疗、制药和饲料行业,特别是动物饲料。