The Tension on dsDNA Bound to ssDNA/RecA Filaments May Play an Important Role in Driving Efficient and Accurate Homology Recognition and Strand Exchange

Details The Tension on dsDNA Bound to ssDNA/RecA Filaments May Play an Important Role in Driving Efficient and Accurate Homology Recognition and Strand Exchange The Tension on dsDNA Bound to ssDNA/RecA Filaments May Play an Important Role in Driving Efficient and Accurate Homology Recognition and Strand Exchange

2011-08-24

arxiv.org/abs/1108.4936v2

Physics

Biological Physics

Scientific paper

It has long been known that during homology recognition and strand exchange the double stranded DNA (dsDNA) in DNA/RecA filaments is highly extended, but the functional role of the extension has been unclear. We present an analytical model for the dsDNA tension. The model suggests that the binding of additional dsDNA base pairs to the DNA/RecA filament alters the tension in the dsDNA that was already bound to the filament. Such coupled tension changes may explain several previously unexplained experimental results.

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