1MF6

Transducin gamma subunit, C-terminal domain 60-71, rhodopsin-bound state: Ensemble of 15 models determined by TrNOE spectroscopy


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 15 
  • Conformers Submitted: 15 
  • Selection Criteria: all calculated structures submitted 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

RHODOPSIN CONTROLS A CONFORMATIONAL SWITCH ON THE TRANSDUCIN gamma SUBUNIT

Kisselev, O.G.Downs, M.A.

(2003) Structure 11: 367-373


  • PubMed Abstract: 
  • Rhodopsin, a prototypical G protein-coupled receptor, catalyzes the activation of a heterotrimeric G protein, transducin, to initiate a visual signaling cascade in photoreceptor cells. The betagamma subunit complex, especially the C-terminal domain o ...

    Rhodopsin, a prototypical G protein-coupled receptor, catalyzes the activation of a heterotrimeric G protein, transducin, to initiate a visual signaling cascade in photoreceptor cells. The betagamma subunit complex, especially the C-terminal domain of the transducin gamma subunit, Gtgamma(60-71)farnesyl, plays a pivotal role in allosteric regulation of nucleotide exchange on the transducin alpha subunit by light-activated rhodopsin. We report that this domain is unstructured in the presence of an inactive receptor but forms an amphipathic helix upon rhodopsin activation. A K65E/E66K charge reversal mutant of the gamma subunit has diminished interactions with the receptor and fails to adopt the helical conformation. The identification of this conformational switch provides a mechanism for active GPCR utilization of the betagamma complex in signal transfer to G proteins.


    Organizational Affiliation

    Department of Ophthalmology, Saint Louis University School of Medicine, St. Louis, MO 63104, USA. kisselev@slu.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(T)gamma-T1 subunit
A
12Bos taurusGene Names: GNGT1
Find proteins for P02698 (Bos taurus)
Go to Gene View: GNGT1
Go to UniProtKB:  P02698
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 15 
  • Conformers Submitted: 15 
  • Selection Criteria: all calculated structures submitted 
  • Olderado: 1MF6 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2002-08-09 
  • Released Date: 2003-04-15 
  • Deposition Author(s): Kisselev, O.G.

Revision History 

  • Version 1.0: 2003-04-15
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance