8X5Y image
Entry Detail
PDB ID:
8X5Y
EMDB ID:
Title:
CryoEM structure of the histamine H1 receptor-BRIL/Anti BRIL Fab complex with astemizole
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2023-11-20
Release Date:
2024-01-17
Method Details:
Experimental Method:
Resolution:
3.00 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Histamine H1 receptor,Soluble cytochrome b562
Chain IDs:A (auth: B)
Chain Length:438
Number of Molecules:1
Biological Source:Homo sapiens, Escherichia coli
Ligand Molecules
Primary Citation
Molecular mechanism of antihistamines recognition and regulation of the histamine H 1 receptor.
Nat Commun 15 84 84 (2024)
PMID: 38167898 DOI: 10.1038/s41467-023-44477-4

Abstact

Histamine receptors are a group of G protein-coupled receptors (GPCRs) that play important roles in various physiological and pathophysiological conditions. Antihistamines that target the histamine H1 receptor (H1R) have been widely used to relieve the symptoms of allergy and inflammation. Here, to uncover the details of the regulation of H1R by the known second-generation antihistamines, thereby providing clues for the rational design of newer antihistamines, we determine the cryo-EM structure of H1R in the apo form and bound to different antihistamines. In addition to the deep hydrophobic cavity, we identify a secondary ligand-binding site in H1R, which potentially may support the introduction of new derivative groups to generate newer antihistamines. Furthermore, these structures show that antihistamines exert inverse regulation by utilizing a shared phenyl group that inserts into the deep cavity and block the movement of the toggle switch residue W4286.48. Together, these results enrich our understanding of GPCR modulation and facilitate the structure-based design of novel antihistamines.

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Primary Citation of related structures