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- W2134360842 abstract "ABSTRACT MreB is an actin homolog required for the morphogenesis of most rod-shaped bacteria and for other functions, including chromosome segregation. In Caulobacter crescentus and Escherichia coli , the protein seems to play a role in the segregation of sister origins, but its role in Bacillus subtilis chromosome segregation is less clear. To help clarify its role in segregation, we have here studied the protein in Vibrio cholerae , whose chromosome I segregates like the one in C. crescentus and whose chromosome II like the one in E. coli or B. subtilis . The properties of Vibrio MreB were similar to those of its homologs in other bacteria in that it formed dynamic helical filaments, was essential for viability, and was inhibited by the drug A22. Wild-type (WT) cells exposed to A22 became spherical and larger. The nucleoids enlarged correspondingly, and the origin positions for both the chromosomes no longer followed any fixed pattern. However, the sister origins separated, unlike the situation in other bacteria. In mutants isolated as A22 resistant, the nucleoids in some cases appeared compacted even when the cell shape was nearly normal. In these cells, the origins of chromosome I were at the distal edges of the nucleoid but not all the way to the poles where they normally reside. The sister origins of chromosome II also separated less. Thus, it appears that the inhibition or alteration of Vibrio MreB can affect both the nucleoid morphology and origin localization." @default.
- W2134360842 created "2016-06-24" @default.
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- W2134360842 date "2007-10-15" @default.
- W2134360842 modified "2023-10-16" @default.
- W2134360842 title "Changes in Nucleoid Morphology and Origin Localization upon Inhibition or Alteration of the Actin Homolog, MreB, of <i>Vibrio cholerae</i>" @default.
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- W2134360842 doi "https://doi.org/10.1128/jb.00362-07" @default.
- W2134360842 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2168437" @default.
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