|1f88, resolution 2.80Å ()|
|Ligands:||, , , ,|
CRYSTAL STRUCTURE OF BOVINE RHODOPSIN
Heterotrimeric guanine nucleotide-binding protein (G protein)-coupled receptors (GPCRs) respond to a variety of different external stimuli and activate G proteins. GPCRs share many structural features, including a bundle of seven transmembrane alpha helices connected by six loops of varying lengths. We determined the structure of rhodopsin from diffraction data extending to 2.8 angstroms resolution. The highly organized structure in the extracellular region, including a conserved disulfide bridge, forms a basis for the arrangement of the seven-helix transmembrane motif. The ground-state chromophore, 11-cis-retinal, holds the transmembrane region of the protein in the inactive conformation. Interactions of the chromophore with a cluster of key residues determine the wavelength of the maximum absorption. Changes in these interactions among rhodopsins facilitate color discrimination. Identification of a set of residues that mediate interactions between the transmembrane helices and the cytoplasmic surface, where G-protein activation occurs, also suggests a possible structural change upon photoactivation.
Crystal structure of rhodopsin: A G protein-coupled receptor., Palczewski K, Kumasaka T, Hori T, Behnke CA, Motoshima H, Fox BA, Le Trong I, Teller DC, Okada T, Stenkamp RE, Yamamoto M, Miyano M, Science. 2000 Aug 4;289(5480):739-45. PMID:10926528
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
About this Structure
1f88 is a 2 chain structure with sequence from Bos taurus. The March 2002 RCSB PDB Molecule of the Month feature on Bacteriorhodopsin by David S. Goodsell is 10.2210/rcsb_pdb/mom_2002_3. The October 2004 RCSB PDB Molecule of the Month feature on G Proteins by David S. Goodsell is 10.2210/rcsb_pdb/mom_2004_10. The June 2005 RCSB PDB Molecule of the Month feature on Carotenoid Oxygenase by David S. Goodsell is 10.2210/rcsb_pdb/mom_2005_6. 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. The March 2012 RCSB PDB Molecule of the Month feature on Rhodopsin by David Goodsell is 10.2210/rcsb_pdb/mom_2012_3. Full crystallographic information is available from OCA.
- Palczewski K, Kumasaka T, Hori T, Behnke CA, Motoshima H, Fox BA, Le Trong I, Teller DC, Okada T, Stenkamp RE, Yamamoto M, Miyano M. Crystal structure of rhodopsin: A G protein-coupled receptor. Science. 2000 Aug 4;289(5480):739-45. PMID:10926528
- Soyer OS, Dimmic MW, Neubig RR, Goldstein RA. Dimerization in aminergic G-protein-coupled receptors: application of a hidden-site class model of evolution. Biochemistry. 2003 Dec 16;42(49):14522-31. PMID:14661965 doi:10.1021/bi035097r
- Fowler CB, Pogozheva ID, Lomize AL, LeVine H 3rd, Mosberg HI. Complex of an active mu-opioid receptor with a cyclic peptide agonist modeled from experimental constraints. Biochemistry. 2004 Dec 21;43(50):15796-810. PMID:15595835 doi:10.1021/bi048413q
- Baleanu-Gogonea C, Karnik S. Model of the whole rat AT1 receptor and the ligand-binding site. J Mol Model. 2006 Feb;12(3):325-37. Epub 2006 Jan 11. PMID:16404618 doi:10.1007/s00894-005-0049-z