Cell Cycle–Dependent Polar Localization of Chromosome Partitioning Proteins in Caulobacter crescentus

In the bacterium C. crescentus, the cellular homologs of plasmid partitioning proteins, ParA and ParB, localize to both poles of the predivisional cell following the completion of DNA replication. ParB binds to DNA sequences adjacent to the origin of replication suggesting that this region of the ge...

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Veröffentlicht in:Cell 1997-03, Vol.88 (5), p.675-684
Hauptverfasser: Mohl, Dane A, Gober, James W
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Gober, James W
description In the bacterium C. crescentus, the cellular homologs of plasmid partitioning proteins, ParA and ParB, localize to both poles of the predivisional cell following the completion of DNA replication. ParB binds to DNA sequences adjacent to the origin of replication suggesting that this region of the genome is tethered to the poles of the cell at a specific time in the cell cycle. Increasing the cellular levels of ParA and ParB disrupts polar localization and results in defects in both cell division and chromosome partitioning. These results suggest that ParA and ParB are involved in partitioning newly replicated chromosomes to the poles of the predivisional cell and may function as components of a bacterial mitotic apparatus.
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subjects Bacterial Proteins - analysis
Bacterial Proteins - genetics
Base Sequence
caulobacter crescentus
Caulobacter crescentus - chemistry
Caulobacter crescentus - cytology
Caulobacter crescentus - genetics
Cell Cycle - physiology
Chromosomes, Bacterial - physiology
Gene Expression Regulation, Bacterial - physiology
Genes, Bacterial - physiology
Mitosis - physiology
Molecular Sequence Data
Replication Origin - genetics
Repressor Proteins - genetics
Sequence Analysis, DNA
Sequence Homology, Amino Acid
title Cell Cycle–Dependent Polar Localization of Chromosome Partitioning Proteins in Caulobacter crescentus
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