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TitleCryo-electron microscopy structure of the antidiuretic hormone arginine-vasopressin V2 receptor signaling complex.
Journal, issue, pagesSci Adv, Vol. 7, Issue 21, Year 2021
Publish dateMay 21, 2021
AuthorsJulien Bous / Hélène Orcel / Nicolas Floquet / Cédric Leyrat / Joséphine Lai-Kee-Him / Gérald Gaibelet / Aurélie Ancelin / Julie Saint-Paul / Stefano Trapani / Maxime Louet / Rémy Sounier / Hélène Déméné / Sébastien Granier / Patrick Bron / Bernard Mouillac /
PubMed AbstractThe antidiuretic hormone arginine-vasopressin (AVP) forms a signaling complex with the V2 receptor (V2R) and the G protein, promoting kidney water reabsorption. Molecular mechanisms underlying ...The antidiuretic hormone arginine-vasopressin (AVP) forms a signaling complex with the V2 receptor (V2R) and the G protein, promoting kidney water reabsorption. Molecular mechanisms underlying activation of this critical G protein-coupled receptor (GPCR) signaling system are still unknown. To fill this gap of knowledge, we report here the cryo-electron microscopy structure of the AVP-V2R-G complex. Single-particle analysis revealed the presence of three different states. The two best maps were combined with computational and nuclear magnetic resonance spectroscopy constraints to reconstruct two structures of the ternary complex. These structures differ in AVP and G binding modes. They reveal an original receptor-G interface in which the Gα subunit penetrates deep into the active V2R. The structures help to explain how V2R R137H or R137L/C variants can lead to two severe genetic diseases. Our study provides important structural insights into the function of this clinically relevant GPCR signaling complex.
External linksSci Adv / PubMed:34020960 / PubMed Central
MethodsEM (single particle)
Resolution4.2 - 4.4 Å
Structure data

12128

7bb6

EMDB-12128, PDB-7bb6:
AVP-V2R-Galphas-beta1-gamma2-Nb35 (L state)
Method: EM (single particle) / Resolution: 4.2 Å

12129

7bb7

EMDB-12129, PDB-7bb7:
AVP-V2R-Galphas-beta1-gamma2-Nb35(T state)
Method: EM (single particle) / Resolution: 4.4 Å

Source
  • homo sapiens (human)
  • lama glama (llama)
KeywordsMEMBRANE PROTEIN / Signaling protein / G protein-coupled receptor / Hormone / Vasopressin / V2R / Hormrne

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