Structural basis and mechanism of activation of two different families of G proteins by the same GPCR.

Structural basis and mechanism of activation of two different families of G proteins by the same GPCR.
复制标题

DOI:
10.1038/s41594-021-00679-2
复制
发表时间:
2021-11
影响因子:
16.8
通讯作者:
Huang XY
Huang XY
中科院分区:
生物学1区
文献类型:
--
作者:
Alegre KO;Paknejad N;Su M;Lou JS;Huang J;Jordan KD;Eng ET;Meyerson JR;Hite RK;Huang XY

文献摘要

参考文献

被引文献

相似文献

β1-肾上腺素能受体(β1-AR)可激活两个G蛋白家族。当与Gs偶联时,β1-AR增加心输出量,与Gi偶联导致心肌梗死中反应性降低。通过比较分析火鸡β1-AR与Gi或Gs复合物的结构,我们研究了单个G蛋白偶联受体如何同时通过两个G蛋白发出信号。我们发现,虽然Gαi和Gαs上与受体相互作用的关键C端α5螺旋与β1-AR的相互作用相似,但β1-AR与G蛋白之间的总体相互作用模式差异很大。功能研究揭示了不同相互作用的重要性,并提供证据表明,β1-AR对G蛋白的激活功效是由整个三维相互作用表面决定的,包括胞内环2和4(ICL 2和ICL 4)。
The β1-adrenergic receptor (β1-AR) can activate two families of G proteins. When coupled to Gs, β1-AR increases cardiac output, and coupling to Gi leads to decreased responsiveness in myocardial infarction. By comparative structural analysis of turkey β1-AR complexed with either Gi or Gs, we investigate how a single G-protein-coupled receptor simultaneously signals through two G proteins. We find that, although the critical receptor-interacting C-terminal α5-helices on Gαi and Gαs interact similarly with β1-AR, the overall interacting modes between β1-AR and G proteins vary substantially. Functional studies reveal the importance of the differing interactions and provide evidence that the activation efficacy of G proteins by β1-AR is determined by the entire three-dimensional interaction surface, including intracellular loops 2 and 4 (ICL2 and ICL4).
DOI: 10.1007/s00210-011-0648-4
发表时间: 2011-07-01
影响因子: 3.6
作者:
Baker, Jillian G.;Proudman, Richard G. W.;Tate, Christopher G.
通讯作者: Tate, Christopher G.
DOI: 10.1038/s41586-018-0219-7
发表时间: 2018-06
期刊: Nature
影响因子: 64.8
作者:
Koehl A;Hu H;Maeda S;Zhang Y;Qu Q;Paggi JM;Latorraca NR;Hilger D;Dawson R;Matile H;Schertler GFX;Granier S;Weis WI;Dror RO;Manglik A;Skiniotis G;Kobilka BK
通讯作者: Kobilka BK
DOI: 10.1038/s42003-021-02143-9
发表时间: 2021-05-27
影响因子: 5.9
作者:
Jelinek V;Mösslein N;Bünemann M
通讯作者: Bünemann M
DOI: 10.1107/s0907444904019158
发表时间: 2004-12-01
影响因子: 2.2
作者:
Emsley, P;Cowtan, K
通讯作者: Cowtan, K
DOI: 10.1038/363274a0
发表时间: 1993-05-20
期刊: NATURE
影响因子: 64.8
作者:
CONKLIN, BR;FARFEL, Z;BOURNE, HR
通讯作者: BOURNE, HR