Binding free energy calculations between bovine β-lactoglobulin and four fatty acids using the MMGBSA method

Authors

  • Martiniano Bello

    Corresponding author
    1. Laboratorio de Modelado Molecular y Bioinformática de la Escuela Superior de Medicina, Instituto Politécnico Nacional, México. Plan de San Luis Y Diaz Mirón S/N, Col. Casco de Santo Tomas, México
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  • This article was originally published online as an accepted preprint. The “Published Online” date corresponds to the preprint version. You can request a copy of the preprint by emailing the Biopolymers editorial office at biopolymers@wiley.com

ABSTRACT

The bovine dairy protein β-lactoglobulin (βlg) is a promiscuous protein that has the ability to bind several hydrophobic ligands. In this study, based on known experimental data, the dynamic interaction mechanism between bovine βlg and four fatty acids was investigated by a protocol combining molecular dynamics (MD) simulations and molecular mechanics generalized Born surface area (MMGBSA) binding free energy calculations. Energetic analyses revealed binding free energy trends that corroborated known experimental findings; larger ligand size corresponded to greater binding affinity. Finally, binding free energy decomposition provided detailed information about the key residues stabilizing the complex. © 2014 Wiley Periodicals, Inc. Biopolymers 101: 1010–1018, 2014.

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