气候变化领域集成服务门户(CCPortal): Tyrosine phosphorylation-dependent localization of TmaR that controls activity of a major bacterial sugar regulator by polar sequestration

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DOI	10.1073/pnas.2016017118
	Tyrosine phosphorylation-dependent localization of TmaR that controls activity of a major bacterial sugar regulator by polar sequestration
	Szoke T.; Albocher N.; Govindarajan S.; Nussbaum-Shochat A.; Amster-Choder O.
发表日期	2021
ISSN	00278424
卷号	118 期号:2
英文摘要	The poles of Escherichia coli cells are emerging as hubs for major sensory systems, but the polar determinants that allocate their components to the pole are largely unknown. Here, we describe the discovery of a previously unannotated protein, TmaR, which localizes to the E. coli cell pole when phosphorylated on a tyrosine residue. TmaR is shown here to control the subcellular localization and activity of the general PTS protein Enzyme I (EI) by binding and polar sequestration of EI, thus regulating sugar uptake and metabolism. Depletion or overexpression of TmaR results in EI release from the pole or enhanced recruitment to the pole, which leads to increasing or decreasing the rate of sugar consumption, respectively. Notably, phosphorylation of TmaR is required to release EI and enable its activity. Like TmaR, the ability of EI to be recruited to the pole depends on phosphorylation of one of its tyrosines. In addition to hyperactivity in sugar consumption, the absence of TmaR also leads to detrimental effects on the ability of cells to survive in mild acidic conditions. Our results suggest that this survival defect, which is sugar- and EI-dependent, reflects the difficulty of cells lacking TmaR to enter stationary phase. Our study identifies TmaR as the first, to our knowledge, E. coli protein reported to localize in a tyrosine-dependent manner and to control the activity of other proteins by their polar sequestration and release. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Bacterial polarity; Cell pole; Protein localization; PTS system; Tyrosine phosphorylation
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/181035
作者单位	Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, Faculty of Medicine, Hebrew University, Jerusalem, 91120, Israel; Department of Biology, SRM University, AP, Amaravati, Andhra Pradesh, 522 502, India
推荐引用方式 GB/T 7714	Szoke T.,Albocher N.,Govindarajan S.,et al. Tyrosine phosphorylation-dependent localization of TmaR that controls activity of a major bacterial sugar regulator by polar sequestration[J],2021,118(2).
APA	Szoke T.,Albocher N.,Govindarajan S.,Nussbaum-Shochat A.,&Amster-Choder O..(2021).Tyrosine phosphorylation-dependent localization of TmaR that controls activity of a major bacterial sugar regulator by polar sequestration.Proceedings of the National Academy of Sciences of the United States of America,118(2).
MLA	Szoke T.,et al."Tyrosine phosphorylation-dependent localization of TmaR that controls activity of a major bacterial sugar regulator by polar sequestration".Proceedings of the National Academy of Sciences of the United States of America 118.2(2021).