Genetically encoded chemical probes in cells reveal the binding path of urocortin-I to CRF class B GPCR.
Genetically encoded chemical probes in cells reveal the binding path of urocortin-I to CRF class B GPCR.
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DOI:
10.1016/j.cell.2013.11.008
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发表时间:
2013-12-05
期刊:
影响因子:
64.5
通讯作者:
Wang L
中科院分区:
文献类型:
--
作者:
Coin I;Katritch V;Sun T;Xiang Z;Siu FY;Beyermann M;Stevens RC;Wang L
Molecular determinants regulating the activation of class B G-protein coupled receptors (GPCRs) by native peptide agonists are largely unknown. We have investigated here the interaction between the corticotropin releasing factor receptor type 1 (CRF1R) and its native 40-mer peptide ligand Urocortin-I directly in mammalian cells. By incorporating unnatural amino acid photo-chemical and new click-chemical probes into the receptor, 44 inter-molecular spatial constraints have been derived for the ligand-receptor interaction. The data were analyzed in the context of the recently resolved crystal structure of CRF1R transmembrane domain and existing extracellular domain structures, yielding a complete conformational model for the peptide-receptor complex. Structural features of the receptor-ligand complex yield molecular insights on the mechanism of receptor activation. The experimental strategy provides unique information on full-length post-translationally modified GPCRs in the native membrane of the live cell, complementing in vitro biophysical reductionist approaches.
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影响因子:
64.8
作者:
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通讯作者:
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DOI:
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发表时间:
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期刊:
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