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Journal Article

Elastic correlations in nucleosomal DNA structure

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Golestanian,  R.
Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Mohammad-Rafiee, F., & Golestanian, R. (2005). Elastic correlations in nucleosomal DNA structure. Physical Review Letters, 94(23): 238102. doi:10.1103/PhysRevLett.94.238102.


Cite as: https://hdl.handle.net/21.11116/0000-0001-AD3A-C
Abstract
The structure of DNA in the nucleosome core particle is studied using an elastic model that incorporates anisotropy in the bending energetics and twist-bend coupling. Using the experimentally determined structure of nucleosomal DNA [T.J. Richmond and C.A. Davey, Nature (London)NATUAS0028-0836 423, 145 (2003)10.1038/nature01595], it is shown that elastic correlations exist between twist, roll, tilt, and stretching of DNA, as well as the distance between phosphate groups. The twist-bend coupling term is shown to be able to capture these correlations to a large extent, and a fit to the experimental data yields a new estimate of G=25nm for the value of the twist-bend coupling constant. © 2005 The American Physical Society.