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Bioinformatics Advance Access originally published online on September 29, 2009
Bioinformatics 2009 25(23):3187-3188; doi:10.1093/bioinformatics/btp566
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© The Author(s) 2009. Published by Oxford University Press.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

VDNA: The virtual DNA plug-in for VMD

Thomas C. Bishop

Center for Computational Science, Tulane University, Lindy Boggs Center Suite 500, New Orleans, LA 70118, USA


   Abstract

Summary: The DNA inter base pair step parameters (Tilt, Roll, Twist, Shift, Slide, Rise) are a standard internal coordinate representation of DNA. In the absence of bend and shear, it is relatively easy to mentally visualize how Twist and Rise generate the familiar double helix. More complex structures do not readily yield to such intuition. For this reason, we developed a plug-in for VMD that accepts a set of mathematical expressions as input and generates a coarse-grained model of DNA as output. This feature of VDNA appears to provide a unique approach to DNA modeling. Predefined expressions include: linear, sheared, bent and circular DNA, and models of the nucleosome superhelix, chromatin, thermal motion and nucleosome unwrapping.

Availability: VDNA is pre-installed in VMD, http://www.ks.uiuc.edu/Research/vmd. Updates are at http://dna.ccs.tulane.edu.

Contact: bishop{at}tulane.edu

Associate Editor: Anna Tramontano


Received on July 3, 2009; revised on August 18, 2009; accepted on September 10, 2009

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