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Volume 155, Issue 4

ParB deficiency in destabilizes the partner protein ParA and affects a variety of physiological parameters Free

Abstract

Deletions leading to complete or partial removal of ParB were introduced into the chromosome. Fluorescence microscopy of fixed cells showed that ParB mutants lacking the C-terminal domain or HTH motif formed multiple, less intense foci scattered irregularly, in contrast to the one to four ParB foci per cell symmetrically distributed in wild-type . All mutations affected both bacterial growth and swarming and swimming motilities, and increased the production of anucleate cells. Similar effects were observed after inactivation of of . As complete loss of ParA destabilized its partner ParB it was unclear deficiency of which protein is responsible for the mutant phenotypes. Analysis of four mutants showed that complete loss of ParB destabilized ParA whereas three mutants that retained the N-terminal 90 aa of ParB did not. As all four mutants demonstrate the same defects it can be concluded that either ParB, or ParA and ParB in combination, plays an important role in nucleoid distribution, growth and motility in .

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  • Published Online:
Keyword(s): DAPI, 4′,6-diamidino-2-phenylindole
SGM
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2009-04-01
2024-04-23
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ParB deficiency in Pseudomonas aeruginosa destabilizes the partner protein ParA and affects a variety of physiological parameters
Microbiology 155, 1080 (2009); https://doi.org/10.1099/mic.0.024661-0
/content/journal/micro/10.1099/mic.0.024661-0
/content/journal/micro/10.1099/mic.0.024661-0
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