Wozniak Daniel J, Sprinkle April B, Baynham Patricia J
Department of Microbiology and Immunology, Wake Forest University School of Medicine, Winston-Salem, North Carolina 27157, USA.
J Bacteriol. 2003 Dec;185(24):7297-300. doi: 10.1128/JB.185.24.7297-7300.2003.
AlgZ controls Pseudomonas aeruginosa alginate synthesis by activating algD, yet algZ expression is not detectable in nonmucoid strains. Mobility shift and Western blot assays revealed that algZ expression requires the sigma factor AlgT. The mapped algZ transcription start site revealed a consensus AlgT-dependent promoter that, when mutated, substantially reduced algZ transcription.
AlgZ通过激活algD来控制铜绿假单胞菌藻酸盐的合成,但在非黏液型菌株中检测不到AlgZ的表达。迁移率变动分析和蛋白质免疫印迹分析表明,AlgZ的表达需要σ因子AlgT。定位的algZ转录起始位点显示出一个依赖AlgT的共有启动子,该启动子发生突变时,会大幅降低algZ的转录水平。