sigma因子(Sigma factor)是一类在细菌和古菌中起调控转录的关键蛋白质因子。它们能结合到RNA聚合酶上,引导RNA聚合酶在特定启动子区域结合和启动转录。sigma因子是细菌中转录起始的重要调控因素,能够识别和结合不同的启动子,并与核心RNA聚合酶进行复合。 2. •RNA聚合酶(RNA polymerase): 一种蛋白质复合物,负责将...
Heat shock transcription factor sigma(32) of Escherichia coli plays a major role in protein homeostasis and requires membrane localization for regulation. We here report that a strongly deregulated 154N-sigma(32) mutant defective in association with the membrane can be phenotypically suppressed by Tn5...
Another sigma factor, RpoH, or σ32, activates genes needed during heat shock. Normally, E. coli grows at body temperature, 37°C, and stops growing at temperatures much above 43°C. At such higher temperatures, proteins begin to unfold and are degraded. RpoH activates expression of chapero...
The heat shock response in Escherichia coli is governed by the concentration of the highly unstable σ factor σ32. The essential protein HflB (FtsH), known to control proteolysis of the phage λcII protein, also governs σ32degradation: an HflB-depleted strain accumulated σ32and induced the...
Role of Region C in Regulation of the Heat Shock Gene-Specific Sigma Factor of Escherichia coli, ς32 Schirra C, Schulze-Specking A, Bukau B (1999) Role of region C in regulation of the heat shock gene-specific sigma factor of Escherichia coli, σ3... Florence,Arsène,Toshifumi,......
Escherichia coli starvation proteins include several heat shock proteins whose induction by heat is controlled by the minor sigma factor, sigma 32. The lev... DE Jenkins,EA Auger,A Matin - 《Journal of Bacteriology》 被引量: 314发表: 1991年 Proteolysis of the λ CII regulatory protein by Fts...
The sigma factor(σ ) that controls housekeeping gene transcription is ( ) A. σ 70 B. σ 32 C. σ 38 D. σ 54 如何将EXCEL生成题库手机刷题 如何制作自己的在线小题库 > 手机使用 分享 反馈 收藏 举报 参考答案: A 复制 纠错
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In this work, we show that the ECF sigma factor σF is one of the regulatory proteins involved in the control of the transcriptional response to chromium and cadmium. Microarray experiments indicate that σF controls eight genes during chromium stress, most of which were previously described as ...
pBS32 also encodes a sigma factor homolog, ZpdN that is necessary and sufficient for prophage induction and the protein ComI that is a potent inhibitor of DNA uptake by natural transformation. We provide evidence that the entire pBS32 sequence may be part of the prophage and thus competence ...