Mechanism of N-terminal modulation of activity at the melanocortin-4 receptor GPCR.
Mechanism of N-terminal modulation of activity at the melanocortin-4 receptor GPCR.
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DOI:
10.1038/nchembio.1008
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发表时间:
2012-08
影响因子:
14.8
通讯作者:
Vaisse, Christian
中科院分区:
文献类型:
--
作者:
Ersoy, Baran A.;Pardo, Leonardo;Zhang, Sumei;Thompson, Darren A.;Millhauser, Glenn;Govaerts, Cedric;Vaisse, Christian
Most of our understanding of G protein–coupled receptor (GPCR) activation has been focused on the direct interaction between diffusible ligands and their seven-transmembrane domains. However, a number of these receptors depend on their extracellular N-terminal domain for ligand recognition and activation. To dissect the molecular interactions underlying both modes of activation at a single receptor, we used the unique properties of the melanocortin-4 receptor (MC4R), a GPCR that shows constitutive activity maintained by its N-terminal domain and is physiologically activated by the peptide α-melanocyte stimulating hormone (αMSH). We find that activation by the N-terminal domain and αMSH relies on different key residues in the transmembrane region. We also demonstrate that agouti-related protein, a physiological antagonist of MC4R, acts as an inverse agonist by inhibiting N terminus–mediated activation, leading to the speculation that a number of constitutively active orphan GPCRs could have physiological inverse agonists as sole regulators.
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DOI:
10.1096/fj.08-127530
发表时间:
2009-09
期刊:
FASEB journal : official publication of the Federation of American Societies for Experimental Biology
影响因子:
--
作者:
Bromberg Y;Overton J;Vaisse C;Leibel RL;Rost B
通讯作者:
Rost B
DOI:
10.1073/pnas.86.19.7321
发表时间:
1989-10-01
影响因子:
11.1
作者:
COSTA, T;HERZ, A
通讯作者:
HERZ, A
影响因子:
64.8
作者:
Choe, Hui-Woog;Kim, Yong Ju;Ernst, Oliver P.
通讯作者:
Ernst, Oliver P.
影响因子:
3.6
作者:
Pellissier, Lucie P.;Sallander, Jessica;Pardo, Leonardo
通讯作者:
Pardo, Leonardo
DOI:
10.1152/ajpregu.00878.2006
发表时间:
2007-06-01
影响因子:
2.8
作者:
Peter, Jean-Christophe;Nicholson, Janet R.;Hofbauer, Karl G.
通讯作者:
Hofbauer, Karl G.