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A vibrational entropy term for DNA docking with autodock.

Abstract：

:DNA interacts with small molecules, from water to endogenous reactive oxygen and nitrogen species, environmental mutagens and carcinogens, and pharmaceutical anticancer molecules. Understanding and predicting the physical interactions of small molecules with DNA via docking is key not only for the comprehension of molecular-level events that lead to carcinogenesis and other diseases, but also for the rational design of drugs that target DNA. We recently validated AutoDock, a popular docking method that includes a physics-based scoring function and a Lamarckian Genetic Algorithm, for the prediction of small molecule geometries upon physical binding to DNA. In this work, we added a vibrational entropy term based on the docking frequency to the scoring function in order to improve the accuracy of the best (lowest) score geometry. We found that in four small molecule-DNA systems the inclusion of the vibrational entropy term decreased the root-mean-square-deviation from the experimental crystallographic structure. Including the entropy term also preserved the successful prediction of the binding geometry compared to the crystallographic structure for the rest of the small molecule-DNA systems. We also improved the method of creating clusters of docking geometries and emphasized the importance of the length of the search process for similar vibrational entropy terms.

journal_name

Comput Biol Chem

journal_title

Computational biology and chemistry

authors

McElfresh GW,Deligkaris C

doi

10.1016/j.compbiolchem.2018.03.027

subject

Has Abstract

pub_date

2018-06-01 00:00:00

pages

286-293

eissn

1476-9271

issn

1476-928X

pii

S1476-9271(17)30874-5

journal_volume

74

pub_type

杂志文章

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