|2r4r, resolution 3.40Å ()|
|Gene:||ADRB2, ADRB2R, B2AR (Homo sapiens)|
Crystal structure of the human beta2 adrenoceptor
Structural analysis of G-protein-coupled receptors (GPCRs) for hormones and neurotransmitters has been hindered by their low natural abundance, inherent structural flexibility, and instability in detergent solutions. Here we report a structure of the human beta2 adrenoceptor (beta2AR), which was crystallized in a lipid environment when bound to an inverse agonist and in complex with a Fab that binds to the third intracellular loop. Diffraction data were obtained by high-brilliance microcrystallography and the structure determined at 3.4 A/3.7 A resolution. The cytoplasmic ends of the beta2AR transmembrane segments and the connecting loops are well resolved, whereas the extracellular regions of the beta2AR are not seen. The beta2AR structure differs from rhodopsin in having weaker interactions between the cytoplasmic ends of transmembrane (TM)3 and TM6, involving the conserved E/DRY sequences. These differences may be responsible for the relatively high basal activity and structural instability of the beta2AR, and contribute to the challenges in obtaining diffraction-quality crystals of non-rhodopsin GPCRs.
Crystal structure of the human beta2 adrenergic G-protein-coupled receptor., Rasmussen SG, Choi HJ, Rosenbaum DM, Kobilka TS, Thian FS, Edwards PC, Burghammer M, Ratnala VR, Sanishvili R, Fischetti RF, Schertler GF, Weis WI, Kobilka BK, Nature. 2007 Nov 15;450(7168):383-7. Epub 2007 Oct 21. PMID:17952055
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
About this Structure
2r4r is a 3 chain structure with sequence from Homo sapiens and Mus musculus. The April 2008 RCSB PDB Molecule of the Month feature on Adrenergic Receptors by David S. Goodsell is 10.2210/rcsb_pdb/mom_2008_4. Full crystallographic information is available from OCA.
- Rasmussen SG, Choi HJ, Rosenbaum DM, Kobilka TS, Thian FS, Edwards PC, Burghammer M, Ratnala VR, Sanishvili R, Fischetti RF, Schertler GF, Weis WI, Kobilka BK. Crystal structure of the human beta2 adrenergic G-protein-coupled receptor. Nature. 2007 Nov 15;450(7168):383-7. Epub 2007 Oct 21. PMID:17952055 doi:10.1038/nature06325