摘要
csrA基因产物是大肠杆菌芳香族氨基酸生物合成途径中碳中心代谢有关的一种全局性调控蛋白质。采用Red敲除系统介导的同源重组的方法定位缺失大肠杆菌染色体csrA基因,经PCR、DNA测序等多种方法证实了基因重组缺失的可靠性。csrA基因缺失后,缺失菌株较对照菌株,糖酸转化率有所提高,发酵生产苯丙氨酸的能力也得到一定的提高,产酸提高约13%。
csrA (carbon storage regulator A) gene encodes a global regulatory protein relating to central carbon metabolism in E. coli aromatic pathway. The global regulatory gene csrA was disrupted by using Red recombinant system, and confirmed by PCR and DNA sequencing methods. Comparing with the control strains, in csrA-disrupted strain the rate of conversion from glucose to amino acid increased and the L-phe production also increased by nearly 13%.
出处
《氨基酸和生物资源》
CAS
2012年第2期1-4,共4页
Amino Acids & Biotic Resources
基金
国家发改委"2010年国家技术产业化微生物制造专项"