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- W1984864323 abstract "Vibrio cholerae carries homologs of plasmid-borne parA and parB genes on both of its chromosomes. The par genes help to segregate many plasmids and chromosomes. Here we have studied the par genes of V. cholerae chromosome I. Earlier studies suggested that ParBI binds to the centromeric site parSI near the origin of replication (oriI), and parSI-ParBI complexes are placed at the cell poles by ParAI. Deletion of parAI and parSI caused the origin-proximal DNA to be less polar. Here we found that deletion of parBI also resulted in a less polar localization of oriI. However, unlike the deletion of parAI, the deletion of parBI increased the oriI number. Replication was normal when both parAI and parBI were deleted, suggesting that ParBI mediates its action through ParAI. Overexpression of ParAI in a parABI-deleted strain also increased the DNA content. The results are similar to those found for Bacillus subtilis, where ParA (Soj) stimulates replication and this activity is repressed by ParB (SpoOJ). As in B. subtilis, the stimulation of replication most likely involves the replication initiator DnaA. Our results indicate that control of chromosomal DNA replication is an additional function of chromosomal par genes conserved across the Gram-positive/Gram-negative divide." @default.
- W1984864323 created "2016-06-24" @default.
- W1984864323 creator A5049398380 @default.
- W1984864323 creator A5057765872 @default.
- W1984864323 creator A5082809825 @default.
- W1984864323 creator A5090372858 @default.
- W1984864323 date "2011-04-01" @default.
- W1984864323 modified "2023-09-23" @default.
- W1984864323 title "Participation of Chromosome Segregation Protein ParAI of <i>Vibrio cholerae</i> in Chromosome Replication" @default.
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- W1984864323 doi "https://doi.org/10.1128/jb.01067-10" @default.
- W1984864323 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3067663" @default.
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