Internal Coordinates for Molecular Dynamics and Minimization in Structure Determination and Refinement

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Abstract:

We present a software module which allows one to efficiently perform molecular dynamics and local minimization calculations in internal coordinates when incorporated into a molecular dynamics package. We have implemented a reference interface to the NIH version of the X-PLOR structure refinement package and we show that the module provides superior torsion-angle dynamics functionality relative to the native X-PLOR implementation. The module has been designed in a portable fashion so that interfacing it with other packages should be relatively easy. Other features of the module include the ability to define rather general internal coordinates, an accurate integration algorithm which can automatically adjust the integration step size, and a modular design, which facilitates extending and enhancing the module.

Document Type: Research Article

Affiliations: 1: Computational Bioscience and Engineering Laboratory, Center for Information Technology, National Institutes of Health, Building 12A, Bethesda, Maryland, 20892-5624 2: Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Building 5, Bethesda, Maryland, 20892-0510

Publication date: October 1, 2001

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