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Computations of Standard Binding Free Energies with Molecular Dynamics Simulations

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Deng, Yuqing, Roux, Benoît·2009·The Journal of Physical Chemistry B

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Abstract

An increasing number of studies have reported computations of the standard (absolute) binding free energy of small ligands to proteins using molecular dynamics (MD) simulations and explicit solvent molecules that are in good agreement with experiments. This encouraging progress suggests that physics-based approaches hold the promise of making important contributions to the process of drug discovery and optimization in the near future. Two types of approaches are principally used to compute binding free energies with MD simulations. The most widely known is the alchemical double decoupling method, in which the interaction of the ligand with its surroundings are progressively switched off. It is also possible to use a potential of mean force (PMF) method, in which the ligand is physically separated from the protein receptor. For both of these computational approaches, restraining potentials may be activated and released during the simulation for sampling efficiently the changes in translational, rotational, and conformational freedom of the ligand and protein upon binding. Because such restraining potentials add bias to the simulations, it is important that their effects be rigorously removed to yield a binding free energy that is properly unbiased with respect to the standard state. A review of recent results is presented, and differences in computational methods are discussed. Examples of computations with T4-lysozyme mutants, FKBP12, SH2 domain, and cytochrome P450 are discussed and compared. Remaining difficulties and challenges are highlighted.

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See all 591

Authors: Deng, Y., & Roux, B.
Venue: The Journal of Physical Chemistry B
Publisher: American Chemical Society (ACS)
Published: 2009-01-15
Volume: 113
Issue: 8
Pages: 2234-2246
ISSN: 1520-5207 (ISSN-L)
1520-6106
DOI: 10.1021/jp807701h
OpenAlex: W2050774715
Cited by: 591
References: 115
FWCI: 41.85
Type: journal article
Language: en
Open access: green

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Computations of Standard Binding Free Energies with Molecular Dynamics Simulations

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