Goldberg R B, Bloom F R, Magasanik B
J Bacteriol. 1976 Jul;127(1):114-9. doi: 10.1128/jb.127.1.114-119.1976.
Regulation of the expression of the histidase coded by hutk of Klebsiella aerogenes in Salmonella typhimurium and in Escherichia coli and of the expression of the histidase coded by huts of S. typhimurium in E. coli was investigated. The hutk histidase was found to be sensitive to catabolite repression in K. aerogenes and in E. coli, but insensitive to catabolite repression in S. typhimurium; huts histidase has previously been shown to be catabolite sensitive in all three organisms. The expression of both hutk and huts histidase in E. coli was activated by nitrogen starvation. Apparently, the glutamine synthetase of E. coli may activate the formation of some glutamate- and ammonia-producing enzymes.
对产气克雷伯菌的hutk编码的组氨酸酶在鼠伤寒沙门氏菌和大肠杆菌中的表达调控，以及鼠伤寒沙门氏菌的huts编码的组氨酸酶在大肠杆菌中的表达调控进行了研究。发现hutk组氨酸酶在产气克雷伯菌和大肠杆菌中对分解代谢物阻遏敏感，但在鼠伤寒沙门氏菌中对分解代谢物阻遏不敏感；huts组氨酸酶此前已被证明在所有这三种生物体中对分解代谢物敏感。氮饥饿激活了大肠杆菌中hutk和huts组氨酸酶的表达。显然，大肠杆菌的谷氨酰胺合成酶可能激活一些产生谷氨酸和氨的酶的形成。
