Choi Ki Young, Zylstra Gerben J, Kim Eungbin
Department of Biology, Yonsei University, Seoul 120-749, Korea.
Appl Environ Microbiol. 2007 Feb;73(4):1370-4. doi: 10.1128/AEM.02379-06. Epub 2006 Dec 8.
Rhodococcus sp. strain DK17 exhibits a catabolite repression-like response when provided simultaneously with benzoate and phthalate as carbon and energy sources. Benzoate in the medium is depleted to detection limits before the utilization of phthalate begins. The transcription of the genes encoding benzoate and phthalate dioxygenase paralleled the substrate utilization profile. Two mutant strains with defective benzoate dioxygenases were unable to utilize phthalate in the presence of benzoate, although they grew normally on phthalate in the absence of benzoate.
当同时提供苯甲酸盐和邻苯二甲酸盐作为碳源和能源时,红球菌属菌株DK17表现出类似分解代谢物阻遏的反应。在邻苯二甲酸盐开始利用之前,培养基中的苯甲酸盐被消耗至检测限。编码苯甲酸盐和邻苯二甲酸盐双加氧酶的基因转录与底物利用情况平行。两个苯甲酸盐双加氧酶有缺陷的突变菌株在有苯甲酸盐存在时无法利用邻苯二甲酸盐,尽管它们在没有苯甲酸盐的情况下能在邻苯二甲酸盐上正常生长。