Melting of genomic DNA: predictive modeling by nonlinear lattice dynamics

Details Melting of genomic DNA: predictive modeling by nonlinear lattice dynamics Melting of genomic DNA: predictive modeling by nonlinear lattice dynamics

2010-07-16

arxiv.org/abs/1007.2728v2

Phys. Rev. E 82, 021905 (2010)

Physics

Biological Physics

5 pages, 4 figures, to appear in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.82.021905

The melting behavior of long, heterogeneous DNA chains is examined within the framework of the nonlinear lattice dynamics based Peyrard-Bishop-Dauxois (PBD) model. Data for the pBR322 plasmid and the complete T7 phage have been used to obtain model fits and determine parameter dependence on salt content. Melting curves predicted for the complete fd phage and the Y1 and Y2 fragments of the $\phi$X174 phage without any adjustable parameters are in good agreement with experiment. The calculated probabilities for single base-pair opening are consistent with values obtained from imino proton exchange experiments.

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