| Literature DB >> 17332412 |
Ethan C Garner1, Christopher S Campbell, Douglas B Weibel, R Dyche Mullins.
Abstract
Multiple unrelated polymer systems have evolved to partition DNA molecules between daughter cells at division. To better understand polymer-driven DNA segregation, we reconstituted the three-component segregation system of the R1 plasmid from purified components. We found that the ParR/parC complex can construct a simple bipolar spindle by binding the ends of ParM filaments, inhibiting dynamic instability, and acting as a ratchet permitting incorporation of new monomers and riding on the elongating filament ends. Under steady-state conditions, the dynamic instability of unattached ParM filaments provides the energy required to drive DNA segregation.Entities:
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Year: 2007 PMID: 17332412 PMCID: PMC2851738 DOI: 10.1126/science.1138527
Source DB: PubMed Journal: Science ISSN: 0036-8075 Impact factor: 47.728