Single-molecule analysis of ligand efficacy in β(2)AR-G-protein activation.
Single-molecule analysis of ligand efficacy in β(2)AR-G-protein activation.
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DOI:
10.1038/nature22354
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发表时间:
2017-07-06
期刊:
影响因子:
64.8
通讯作者:
Blanchard SC
中科院分区:
文献类型:
--
作者:
Gregorio GG;Masureel M;Hilger D;Terry DS;Juette M;Zhao H;Zhou Z;Perez-Aguilar JM;Hauge M;Mathiasen S;Javitch JA;Weinstein H;Kobilka BK;Blanchard SC
G protein-coupled receptor (GPCR)-mediated signal transduction is central to human physiology and disease intervention, yet the molecular mechanisms responsible for ligand-dependent signaling responses remain poorly understood. In Class A GPCRs, receptor activation and G protein coupling entail outward movements of transmembrane segment 6 (TM6). Using single-molecule Fluorescence Resonance Energy Transfer (smFRET) imaging, we examine TM6 motions in the β2 adrenergic receptor (β2AR) upon exposure to orthosteric ligands with different efficacies, in the absence and presence of the Gs heterotrimer. We show that partial and full agonists affect TM6 motions in a manner that differentially regulates the rate at which GDP-bound β2AR-Gs complexes are formed and the efficiency of nucleotide exchange leading to Gs activation. These data also reveal transient nucleotide-bound β2AR-Gs species distinct from known structures and single-molecule perspectives on the allosteric link between ligand and nucleotide binding pockets that shed new light on the G protein activation mechanism.
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影响因子:
64.5
作者:
Manglik A;Kim TH;Masureel M;Altenbach C;Yang Z;Hilger D;Lerch MT;Kobilka TS;Thian FS;Hubbell WL;Prosser RS;Kobilka BK
通讯作者:
Kobilka BK
影响因子:
7.5
作者:
Manglik, Aashish;Kobilka, Brian
通讯作者:
Kobilka, Brian
影响因子:
64.8
作者:
Huang W;Manglik A;Venkatakrishnan AJ;Laeremans T;Feinberg EN;Sanborn AL;Kato HE;Livingston KE;Thorsen TS;Kling RC;Granier S;Gmeiner P;Husbands SM;Traynor JR;Weis WI;Steyaert J;Dror RO;Kobilka BK
通讯作者:
Kobilka BK
影响因子:
64.8
作者:
Flock T;Ravarani CNJ;Sun D;Venkatakrishnan AJ;Kayikci M;Tate CG;Veprintsev DB;Babu MM
通讯作者:
Babu MM
影响因子:
16.8
作者:
Gales, Celine;Van Durm, Joost J. J.;Bouvier, Michel
通讯作者:
Bouvier, Michel