ArticleNucleic acids research2014
Initiator protein dimerization plays a key role in replication control of Vibrio cholerae chromosome 2.
Article in Nucleic acids research, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 18 citations in OpenAlex.
- Dynamic transitions of initiator binding coordinate the replication of the two chromosomes in Vibrio cholerae.Nature communications · 2025Article
- The replication enhancer crtS depends on transcription factor Lrp for modulating binding of initiator RctB to ori2 of Vibrio cholerae.Nucleic acids research · 2024Article
- Cell cycle-coordinated maintenance of theEcoSal Plus · 2023Review
- Convergent evolution in two bacterial replicative helicase loaders.Trends in biochemical sciences · 2022Review
- The dimerization interface of initiator RctB governs chaperone and enhancer dependence of Vibrio cholerae chromosome 2 replication.Nucleic acids research · 2022Article
- The coordinated replication of Vibrio cholerae's two chromosomes required the acquisition of a unique domain by the RctB initiator.Nucleic acids research · 2021Article
- Vibrio cholerae chromosome 2 copy number is controlled by the methylation-independent binding of its monomeric initiator to the chromosome 1 crtS site.Nucleic acids research · 2018Article
- Replicate Once Per Cell Cycle: Replication Control of Secondary Chromosomes.Frontiers in microbiology · 2018Review
- Establishing a System for Testing Replication Inhibition of the Vibrio cholerae Secondary Chromosome in Escherichia coli.Antibiotics (Basel, Switzerland) · 2017Article
- The replication initiator of the cholera pathogen's second chromosome shows structural similarity to plasmid initiators.Nucleic acids research · 2017Article
- Article
- A checkpoint control orchestrates the replication of the two chromosomes of Vibrio cholerae.Science advances · 2016Article
- Article
- Replication Initiation in Bacteria.The EnzymesReview
Corrections and comments
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Authors and funding
3 authors at 2 institutions in 1 country.
Funding
Abstract
RctB, the initiator of replication of Vibrio cholerae chromosome 2 (chr2), binds to the origin of replication to specific 12-mer sites both as a monomer and a dimer. Binding to 12-mers is essential for initiation. The monomers also bind to a second kind of site, 39-mers, which inhibits initiation. Mutations in rctB that reduce dimer binding increase monomer binding to 12-mers but decrease monomer binding to 39-mers. The mechanism of this paradoxical binding behavior has been unclear. Using deletion and alanine substitution mutants of RctB, we have now localized to a 71 amino acid region residues important for binding to the two kinds of DNA sites and for RctB dimerization. We find that the dimerization domain overlaps with both the DNA binding domains, explaining how changes in the dimerization domain can alter both kinds of DNA binding. Moreover, dimerization-defective mutants could be initiation-defective without apparent DNA binding defect. These results suggest that dimerization might be important for initiation beyond its role in controlling DNA binding. The finding that determinants of crucial initiator functions reside in a small region makes the region an attractive target for anti-V. cholerae drugs.
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