Analysis of a DNA Simulation Model Through Hairpin Melting Experiments

Overview

Journal J Chem Phys

Publisher American Institute of Physics

Specialties Biophysics
Chemistry

Date 2010 Oct 5

PMID 20886965

Citations 7

Authors

Margaret C Linak

Kevin D Dorfman

Affiliations

Soon will be listed here.

Abstract

We compare the predictions of a two-bead Brownian dynamics simulation model to melting experiments of DNA hairpins with complementary AT or GC stems and noninteracting loops in buffer A. This system emphasizes the role of stacking and hydrogen bonding energies, which are characteristics of DNA, rather than backbone bending, stiffness, and excluded volume interactions, which are generic characteristics of semiflexible polymers. By comparing high throughput data on the open-close transition of various DNA hairpins to the corresponding simulation data, we (1) establish a suitable metric to compare the simulations to experiments, (2) find a conversion between the simulation and experimental temperatures, and (3) point out several limitations of the model, including the lack of G-quartets and cross stacking effects. Our approach and experimental data can be used to validate similar coarse-grained simulation models.

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