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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Phosphorylation stimulates the cooperative DNA-binding properties of the transcription factor OmpR
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Phosphorylation stimulates the cooperative DNA-binding properties of the transcription factor OmpR

机译:磷酸化刺激转录因子OmpR的协同DNA结合特性

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摘要

The two-component regulatory proteins OmpR and EnvZ of Escherichia coli K-12 regulate expression of the major outer membrane porin protein, OmpF. OmpR is a DNA-binding protein that is involved in both the positive and negative control of ompF transcription. EnvZ is a histidine kinase that phosphorylates OmpR in response to environ- mental signals. We used DNA migration retardation analysis to examine the interactions of OmpR and the phosphorylated form of OmpR (OmpR-P) with the regulatory region imme- diately upstream of the ompF promoter.
机译:大肠杆菌K-12的两组分调节蛋白OmpR和EnvZ调节主要外膜孔蛋白OmpF的表达。 OmpR是一种DNA结合蛋白,同时参与ompF转录的阳性和阴性对照。 EnvZ是一种组氨酸激酶,可响应环境信号使OmpR磷酸化。我们使用DNA迁移阻滞分析来检查OmpR和OmpR的磷酸化形式(OmpR-P)与紧邻ompF启动子上游的调控区的相互作用。

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