6OS0 image
Entry Detail
PDB ID:
6OS0
Title:
Structure of synthetic nanobody-stabilized angiotensin II type 1 receptor bound to angiotensin II
Biological Source:
PDB Version:
Deposition Date:
2019-05-01
Release Date:
2020-02-19
Method Details:
Experimental Method:
Resolution:
2.90 Å
R-Value Free:
0.31
R-Value Work:
0.25
R-Value Observed:
0.26
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Type-1 angiotensin II receptor,Soluble cytochrome b562 BRIL fusion protein
Chain IDs:A
Chain Length:425
Number of Molecules:1
Biological Source:Homo sapiens, Escherichia coli
Polymer Type:polypeptide(L)
Description:Angiotensinogen
Chain IDs:C (auth: B)
Chain Length:8
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Nanobody Nb.AT110i1
Chain IDs:B (auth: D)
Chain Length:126
Number of Molecules:1
Biological Source:synthetic construct
Primary Citation
Angiotensin and biased analogs induce structurally distinct active conformations within a GPCR.
Science 367 888 892 (2020)
PMID: 32079768 DOI: 10.1126/science.aay9813

Abstact

Biased agonists of G protein-coupled receptors (GPCRs) preferentially activate a subset of downstream signaling pathways. In this work, we present crystal structures of angiotensin II type 1 receptor (AT1R) (2.7 to 2.9 angstroms) bound to three ligands with divergent bias profiles: the balanced endogenous agonist angiotensin II (AngII) and two strongly β-arrestin-biased analogs. Compared with other ligands, AngII promotes more-substantial rearrangements not only at the bottom of the ligand-binding pocket but also in a key polar network in the receptor core, which forms a sodium-binding site in most GPCRs. Divergences from the family consensus in this region, which appears to act as a biased signaling switch, may predispose the AT1R and certain other GPCRs (such as chemokine receptors) to adopt conformations that are capable of activating β-arrestin but not heterotrimeric Gq protein signaling.

Legend

Protein

Chemical

Disease

Primary Citation of related structures