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Dopamine D3 receptor antagonist reveals a cryptic pocket in aminergic GPCRs

Journal Article · · Scientific Reports
 [1];  [1];  [2];  [2];  [2];  [2];  [2];  [3];  [3];  [3];  [3];  [3];  [4]
  1. Univ. Pompeu Fabra, Barcelona (Spain); Acellera, Barcelona (Spain)
  2. Pfizer Worldwide Research and Development, Groton, CT (United States)
  3. Pfizer Worldwide Research and Development, Cambridge, MA (United States)
  4. Univ. Pompeu Fabra, Barcelona (Spain); Acellera, Barcelona (Spain); Inst. Catalana de Recerca i Estudis Avançats (ICREA), Barcelona (Spain)

The recent increase in the number of X-ray crystal structures of G-protein coupled receptors (GPCRs) has been enabling for structure-based drug design (SBDD) efforts. These structures have revealed that GPCRs are highly dynamic macromolecules whose function is dependent on their intrinsic flexibility. Unfortunately, the use of static structures to understand ligand binding can potentially be misleading, especially in systems with an inherently high degree of conformational flexibility. Here, we show that docking a set of dopamine D3 receptor compounds into the existing eticlopride-bound dopamine D3 receptor (D3R) X-ray crystal structure resulted in poses that were not consistent with results obtained from site-directed mutagenesis experiments. We overcame the limitations of static docking by using large-scale high-throughput molecular dynamics (MD) simulations and Markov state models (MSMs) to determine an alternative pose consistent with the mutation data. The new pose maintains critical interactions observed in the D3R/eticlopride X-ray crystal structure and suggests that a cryptic pocket forms due to the shift of a highly conserved residue, F6.52. Our study highlights the importance of GPCR dynamics to understand ligand binding and provides new opportunities for drug discovery.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
MINECO; FEDER
OSTI ID:
1440593
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 8; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
ENGLISH

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Cited By (7)

Cryptic pocket formation underlies allosteric modulator selectivity at muscarinic GPCRs journal July 2019
Molecular Dynamics Simulations of the Allosteric Modulation of the Adenosine A2a Receptor by a Mini-G Protein journal April 2019
Inclusion of enclosed hydration effects in the binding free energy estimation of dopamine D3 receptor complexes journal September 2019
Insights From Molecular Dynamics Simulations of a Number of G-Protein Coupled Receptor Targets for the Treatment of Pain and Opioid Use Disorders journal August 2019
The Aminotriazole Antagonist Cmpd‐1 Stabilises a Distinct Inactive State of the Adenosine 2A Receptor journal June 2019
The Aminotriazole Antagonist Cmpd‐1 Stabilises a Distinct Inactive State of the Adenosine 2A Receptor journal July 2019
An overview of recent molecular dynamics applications as medicinal chemistry tools for the undruggable site challenge journal January 2018

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