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-Structure paper
タイトル | Structures of neurokinin 1 receptor in complex with G and G proteins reveal substance P binding mode and unique activation features. |
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ジャーナル・号・ページ | Sci Adv, Vol. 7, Issue 50, Page eabk2872, Year 2021 |
掲載日 | 2021年12月10日 |
著者 | Cristian Thom / Janosch Ehrenmann / Santiago Vacca / Yann Waltenspühl / Jendrik Schöppe / Ohad Medalia / Andreas Plückthun / |
PubMed 要旨 | The neurokinin 1 receptor (NKR) is involved in inflammation and pain transmission. This pathophysiologically important G protein–coupled receptor is predominantly activated by its cognate agonist ...The neurokinin 1 receptor (NKR) is involved in inflammation and pain transmission. This pathophysiologically important G protein–coupled receptor is predominantly activated by its cognate agonist substance P (SP) but also by the closely related neurokinins A and B. Here, we report cryo–electron microscopy structures of SP-bound NKR in complex with its primary downstream signal mediators, G and G. Our structures reveal how a polar network at the extracellular, solvent-exposed receptor surface shapes the orthosteric pocket and that NKR adopts a noncanonical active-state conformation with an interface for G protein binding, which is distinct from previously reported structures. Detailed comparisons with antagonist-bound NKR crystal structures reveal that insurmountable antagonists induce a distinct and long-lasting receptor conformation that sterically blocks SP binding. Together, our structures provide important structural insights into ligand and G protein promiscuity, the lack of basal signaling, and agonist- and antagonist-induced conformations in the neurokinin receptor family. |
リンク | Sci Adv / PubMed:34878828 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.71 - 2.87 Å |
構造データ | EMDB-13140, PDB-7p00: EMDB-13141, PDB-7p02: |
化合物 | ChemComp-CLR: |
由来 |
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キーワード | MEMBRANE PROTEIN / Receptor / Complex / Eukaryotic protein |