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- W2169149150 abstract "Motor behavior in prokaryotes is regulated by a phosphorelay network involving a histidine protein kinase, CheA, whose activity is controlled by a family of Type I membrane receptors. In a typical Escherichia coli cell, several thousand receptors are organized together with CheA and an Src homology 3-like protein, CheW, into complexes that tend to be localized at the cell poles. We found that these complexes have at least 6 receptors per CheA. CheW is not required for CheA binding to receptors, but is essential for kinase activation. The kinase activity per mole of bound CheA is proportional to the total bound CheW. Similar results were obtained with the E. coli serine receptor, Tsr, and theSalmonella typhimurium aspartate receptor, Tar. In the case of Tsr, under conditions optimal for kinase activation, the ratio of subunits in complexes is ∼6 Tsr:4 CheW:1 CheA. Our results indicate that information from numerous receptors is integrated to control the activity of a relatively small number of kinase molecules." @default.
- W2169149150 created "2016-06-24" @default.
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- W2169149150 date "2002-09-01" @default.
- W2169149150 modified "2023-09-28" @default.
- W2169149150 title "Organization of the Receptor-Kinase Signaling Array That Regulates Escherichia coli Chemotaxis" @default.
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- W2169149150 doi "https://doi.org/10.1074/jbc.m204317200" @default.
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