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- W2165328945 abstract "Summary In Escherichia coli , chemoreceptor clustering at a cell pole seems critical for signal amplification and adaptation. However, little is known about the mechanism of localization itself. Here we examined whether the aspartate chemoreceptor (Tar) is inserted directly into the polar membrane by using its fusion to green fluorescent protein (GFP). After induction of Tar–GFP, fluorescent spots first appeared in lateral membrane regions, and later cell poles became predominantly fluorescent. Unexpectedly, Tar–GFP showed a helical arrangement in lateral regions, which was more apparent when a Tar–GFP derivative with two cysteine residues in the periplasmic domain was cross‐linked to form higher oligomers. Moreover, similar distribution was observed even when the cytoplasmic domain of the double cysteine Tar–GFP mutant was replaced by that of the kinase EnvZ, which does not localize to a pole. Observation of GFP–SecE and a translocation‐defective MalE–GFP mutant, as well as indirect immunofluorescence microscopy on SecG, suggested that the general protein translocation machinery (Sec) itself is arranged into a helical array, with which Tar is transiently associated. The Sec coil appeared distinct from the MreB coil, an actin‐like cytoskeleton. These findings will shed new light on the mechanisms underlying spatial organization of membrane proteins in E. coli ." @default.
- W2165328945 created "2016-06-24" @default.
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- W2165328945 date "2006-04-21" @default.
- W2165328945 modified "2023-10-18" @default.
- W2165328945 title "Helical distribution of the bacterial chemoreceptor via colocalization with the Sec protein translocation machinery" @default.
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- W2165328945 doi "https://doi.org/10.1111/j.1365-2958.2006.05145.x" @default.
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