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- W2516840689 abstract "Abstract Bacterial mechanosensitive channels protect cells from structural damage during hypoosmotic shock. MscS, MscL and MscK are the most abundant channels in E. coli and arguably the most important ones in osmoprotection. By combining physiological assays with quantitative photo-activated localization microscopy (qPALM), we find an almost linear relationship between channel abundance and cell survival. A minimum of 100 MscL (or MscS) channels is needed for protection when a single type of channel is expressed. Under native-like conditions MscL, MscS as well as MscK distribute homogeneously over the cytoplasmic membrane and the lateral diffusion of the channels is in accordance with their relative protein mass. However, we observe cluster formation and a reduced mobility of MscL when the majority of the subunits of the pentameric channel contain the fluorescent mEos3.2 protein. These data provide new insights into the quantitative biology of mechanosensitive channels and emphasizes the need for care in analysing protein complexes even when the fluorescent tag has been optimized for monomeric behaviour." @default.
- W2516840689 created "2016-09-16" @default.
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- W2516840689 date "2016-09-06" @default.
- W2516840689 modified "2023-09-26" @default.
- W2516840689 title "On the mobility, membrane location and functionality of mechanosensitive channels in Escherichia coli" @default.
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- W2516840689 doi "https://doi.org/10.1038/srep32709" @default.
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