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Pathway and mechanism of drug binding to chemokine receptors revealed by accelerated molecular simulations.

Authors
  • Pawnikar, Shristi1
  • Miao, Yinglong1
  • 1 Center for Computational Biology & Department of Molecular Biosciences, University of Kansas, Lawrence, KS 66047, USA.
Type
Published Article
Journal
Future Medicinal Chemistry
Publisher
"Future Science, LTD"
Publication Date
Jul 01, 2020
Volume
12
Issue
13
Pages
1213–1225
Identifiers
DOI: 10.4155/fmc-2020-0044
PMID: 32515227
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Background: Chemokine GPCRs play key roles in biology and medicine. Particularly, CXCR4 promotes cancer metastasis and facilitate HIV entry into host cells. Plerixafor (PLX) is a CXCR4 drug, but the pathway and binding site of PLX in CXCR4 remain unknown. Results & methodology: We have performed molecular docking and all-atom simulations using Gaussian accelerated molecular dynamics (GaMD), which are consistent with previous mutation experiments, suggesting that PLX binds to the orthosteric site of CXCR4 as an antagonist. The GaMD simulations further revealed an intermediate allosteric binding site at the extracellular mouth of CXCR4. Conclusion: The newly identified allosteric site can be targeted for novel drug design targeting CXCR4 and other chemokine receptors.

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