Title | Differential dynamics in the G protein-coupled receptor rhodopsin revealed by solution NMR |
Publication Type | Journal Article |
Year of Publication | 2004 |
Authors | Klein-Seetharaman J, Yanamala NVK, Javeed F, Reeves PJ, Getmanova EV, Loewen MC, Schwalbe H, Khorana GH |
Journal | Proceedings of the National Academy of Sciences of the United States of America |
Volume | 101 |
Issue | 10 |
Pagination | 3409 - 3413 |
Date Published | 2004/03/09 |
Accession Number | 74 |
Abstract | G protein-coupled receptors are cell-surface seven-helical membrane proteins that undergo conformational changes on activation. The mammalian photoreceptor, rhodopsin, is the best-studied member of this superfamily. Here, we provide the first evidence that activation in rhodopsin may involve differential dynamic properties of side-chain versus backbone atoms. High-resolution NMR studies of α-N-labeled receptor revealed large backbone motions in the inactive dark state. In contrast, indole side-chain N groups of tryptophans showed well resolved, equally intense NMR signals, suggesting restriction to a single specific conformation. |
URL | http://www.pnas.org/content/101/10/3409.abstract |