6b3j

3.3 angstrom phase-plate cryo-EM structure of a biased agonist-bound human GLP-1 receptor-Gs complex3.3 angstrom phase-plate cryo-EM structure of a biased agonist-bound human GLP-1 receptor-Gs complex

6b3j, resolution 3.30Å Show:Asymmetric Unit Biological Assembly Structural highlights 6b3j is a 6 chain structure with sequence from Homo sapiens, Lama glama and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 3.3Å Experimental data: Check Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function GLP1R_HUMAN This is a receptor for glucagon-like peptide 1. The activity of this receptor is mediated by G proteins which activate adenylyl cyclase. Publication Abstract from PubMed The class B glucagon-like peptide-1 (GLP-1) G protein-coupled receptor is a major target for the treatment of type 2 diabetes and obesity. Endogenous and mimetic GLP-1 peptides exhibit biased agonism-a difference in functional selectivity-that may provide improved therapeutic outcomes. Here we describe the structure of the human GLP-1 receptor in complex with the G protein-biased peptide exendin-P5 and a Galphas heterotrimer, determined at a global resolution of 3.3 A. At the extracellular surface, the organization of extracellular loop 3 and proximal transmembrane segments differs between our exendin-P5-bound structure and previous GLP-1-bound GLP-1 receptor structure. At the intracellular face, there was a six-degree difference in the angle of the Galphas-alpha5 helix engagement between structures, which was propagated across the G protein heterotrimer. In addition, the structures differed in the rate and extent of conformational reorganization of the Galphas protein. Our structure provides insights into the molecular basis of biased agonism. Phase-plate cryo-EM structure of a biased agonist-bound human GLP-1 receptor-Gs complex.,Liang YL, Khoshouei M, Glukhova A, Furness SGB, Zhao P, Clydesdale L, Koole C, Truong TT, Thal DM, Lei S, Radjainia M, Danev R, Baumeister W, Wang MW, Miller LJ, Christopoulos A, Sexton PM, Wootten D Nature. 2018 Mar 1;555(7694):121-125. doi: 10.1038/nature25773. Epub 2018 Feb 21. PMID:29466332 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Annexin 3D structures GTP-binding protein 3D structures Glucagon-like peptide receptor 3D structures Transducin 3D structures