Coarse-grained Modeling of DNA Curvature

TL;DR

This paper enhances a coarse-grained DNA model to include intrinsic shape features, enabling more accurate simulations of DNA-protein interactions by validating against experimental data.

Contribution

The authors extend the 3SPN.2 coarse-grained DNA model to incorporate intrinsic shape, improving its ability to simulate DNA curvature and protein-binding properties.

Findings

Refined model accurately predicts melting temperature.

Model reproduces local flexibility and persistence length.

Captures minor groove width profile effectively.

Abstract

Modeling of DNA-protein interactions is a complex process involving many important time and length scales. This can be facilitated through the use of coarse-grained models which reduce the number of degrees of freedom and allow efficient exploration of binding configurations. It is known that the local structure of DNA can significantly affect its protein-binding properties (i.e. intrinsic curvature in DNA-histone complexes). In a step towards comprehensive DNA-protein modeling, we expand the 3SPN.2 coarse-grained model to include intrinsic shape, and validate the refined model against experimental data including melting temperature, local flexibility, persistence length, and minor groove width profile.