1LVR

IC3 of CB1 (L431A,A432L) Bound to G(alpha)i


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 
  • Selection Criteria: back calculated data agree with experimental NOESY spectrum 

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This is version 1.3 of the entry. See complete history


Literature

Cannabinoid receptor-G protein interactions: G(alphai1)-bound structures of IC3 and a mutant with altered G protein specificity.

Ulfers, A.L.McMurry, J.L.Miller, A.Wang, L.Kendall, D.A.Mierke, D.F.

(2002) Protein Sci 11: 2526-2531

  • DOI: https://doi.org/10.1110/ps.0218402
  • Primary Citation of Related Structures:  
    1LVQ, 1LVR

  • PubMed Abstract: 

    The structure of the C-terminal region of the third cytoplasmic loop (IC3) of the cannabinoid receptor one (CB1) bound to G(alphai1) has been determined using transferred nuclear Overhauser effects (NOEs). The wild-type IC3 sequence is helical when associated with G(alphai1). In contrast, a peptide containing the amino-acid inversion, Ala(341)-Leu(342) adopts a single turn. These findings correlate with the attenuated G(i) association of CB1 with the Ala(341)-Leu(342) mutation previously observed in vivo and the diminished stimulation of G(alphai1) GTPase activity by the corresponding peptide demonstrated in vitro here. These results, the first to report the structure of a GPCR domain while associated with G protein, imply the C-terminus of CB1 IC3, a region with high-sequence conservation among G-protein coupled receptors, must be helical for efficient coupling and activation of the G(i) protein.


  • Organizational Affiliation

    Department of Molecular Pharmacology, Division of Biology and Medicine, Brown University, Providence, Rhode Island 02912, USA.


Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cannabinoid receptor 19N/AMutation(s): 2 
UniProt & NIH Common Fund Data Resources
Find proteins for P21554 (Homo sapiens)
Explore P21554 
Go to UniProtKB:  P21554
GTEx:  ENSG00000118432 
Entity Groups  
UniProt GroupP21554
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 
  • Selection Criteria: back calculated data agree with experimental NOESY spectrum 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-12-11
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-10-27
    Changes: Data collection, Database references, Derived calculations