7DTY image
Entry Detail
PDB ID:
7DTY
EMDB ID:
Title:
Structural basis of ligand selectivity conferred by the human glucose-dependent insulinotropic polypeptide receptor
Biological Source:
PDB Version:
Deposition Date:
2021-01-06
Release Date:
2021-08-04
Method Details:
Experimental Method:
Resolution:
2.98 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
Chain IDs:C (auth: A)
Chain Length:394
Number of Molecules:1
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Description:Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
Chain IDs:D (auth: B)
Chain Length:371
Number of Molecules:1
Biological Source:Rattus norvegicus
Polymer Type:polypeptide(L)
Description:Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
Chain IDs:E (auth: G)
Chain Length:71
Number of Molecules:1
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Description:Nanobody-35
Chain IDs:F (auth: N)
Chain Length:140
Number of Molecules:1
Biological Source:synthetic construct
Polymer Type:polypeptide(L)
Description:Gastric inhibitory polypeptide
Chain IDs:B (auth: P)
Chain Length:42
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:human glucose-dependent insulinotropic polypeptide receptor
Chain IDs:A (auth: R)
Chain Length:573
Number of Molecules:1
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Structural insights into hormone recognition by the human glucose-dependent insulinotropic polypeptide receptor.
Elife 10 ? ? (2021)
PMID: 34254582 DOI: 10.7554/eLife.68719

Abstact

Glucose-dependent insulinotropic polypeptide (GIP) is a peptide hormone that exerts crucial metabolic functions by binding and activating its cognate receptor, GIPR. As an important therapeutic target, GIPR has been subjected to intensive structural studies without success. Here, we report the cryo-EM structure of the human GIPR in complex with GIP and a Gs heterotrimer at a global resolution of 2.9 Å. GIP adopts a single straight helix with its N terminus dipped into the receptor transmembrane domain (TMD), while the C terminus is closely associated with the extracellular domain and extracellular loop 1. GIPR employs conserved residues in the lower half of the TMD pocket to recognize the common segments shared by GIP homologous peptides, while uses non-conserved residues in the upper half of the TMD pocket to interact with residues specific for GIP. These results provide a structural framework of hormone recognition and GIPR activation.

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Primary Citation of related structures