6FFI image
Deposition Date 2018-01-08
Release Date 2018-03-07
Last Version Date 2024-01-17
Entry Detail
PDB ID:
6FFI
Title:
Crystal Structure of mGluR5 in complex with MMPEP at 2.2 A
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.20 Å
R-Value Free:
0.26
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Metabotropic glutamate receptor 5,Endolysin,Metabotropic glutamate receptor 5
Gene (Uniprot):E, GRM5
Mutations:E579A N667Y I669A G675M T742A S753A,E579A N667Y I669A G675M T742A S753A,E579A N667Y I669A G675M T742A S753A,E579A N667Y I669A G675M T742A S753A,E579A N667Y I669A G675M T742A S753A,E579A N667Y I669A G675M T742A S753A,E579A N667Y I669A G675M T742A S753A,E579A N667Y I669A G675M T742A S753A,E579A N667Y I669A G675M T742A S753A
Chain IDs:A
Chain Length:444
Number of Molecules:1
Biological Source:Homo sapiens, Enterobacteria phage T4
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
YCM A CYS modified residue
Primary Citation
Structure-Based Optimization Strategies for G Protein-Coupled Receptor (GPCR) Allosteric Modulators: A Case Study from Analyses of New Metabotropic Glutamate Receptor 5 (mGlu5) X-ray Structures.
J.Med.Chem. 62 207 222 (2019)
PMID: 29455526 DOI: 10.1021/acs.jmedchem.7b01722

Abstact

Two interesting new X-ray structures of negative allosteric modulator (NAM) ligands for the mGlu(5) receptor, M-MPEP (3) and fenobam (4), are reported. The new structures show how the binding of the ligands induces different receptor water channel conformations to previously published structures. The structure of fenobam, where a urea replaces the acetylenic linker in M-MPEP and mavoglurant, reveals a binding mode where the ligand is rotated by 180 degrees compared to a previously proposed docking model. The need for multiple ligand structures for accurate GPCR structure-based drug design is demonstrated by the different growing vectors identified for the head groups of M-MPEP and mavoglurant and by the unexpected water-mediated receptor interactions of a new chemotype represented by fenobam. The implications of the new structures for ligand design are discussed, with extensive analysis of the energetics of the water networks of both pseudoapo and bound structures providing a new design strategy for allosteric modulators.

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Primary Citation of related structures