1TBG

BETA-GAMMA DIMER OF THE HETEROTRIMERIC G-PROTEIN TRANSDUCIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.306 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of a G-protein beta gamma dimer at 2.1A resolution.

Sondek, J.Bohm, A.Lambright, D.G.Hamm, H.E.Sigler, P.B.

(1996) Nature 379: 369-374

  • DOI: 10.1038/379369a0

  • PubMed Abstract: 
  • Many signalling cascades use seven-helical transmembrane receptors coupled to heterotrimeric G proteins (G alpha beta gamma) to convert extracellular signals into intracellular responses. Upon nucleotide exchange catalysed by activated receptors, het ...

    Many signalling cascades use seven-helical transmembrane receptors coupled to heterotrimeric G proteins (G alpha beta gamma) to convert extracellular signals into intracellular responses. Upon nucleotide exchange catalysed by activated receptors, heterotrimers dissociate into GTP-bound G alpha subunits and G beta gamma dimers, either of which can modulate many downstream effectors. Here we use multiwavelength anomalous diffraction data to solve the crystal structure of the beta gamma dimer of the G protein transducin. The beta-subunit is primarily a seven-bladed beta-propeller that is partially encircled by an extended gamma-subunit. The beta-propeller, which contains seven structurally similar WD repeats, defines the stereochemistry of the WD repeat and the probable architecture of all WD-repeat-containing domains. The structure details interactions between G protein beta- and gamma-subunits and highlights regions implicated in effector modulation for the conserved family of G protein beta gamma dimers.


    Related Citations: 
    • The 2.0 A Crystal Structure of a Heterotrimeric G Protein
      Lambright, D.G.,Sondek, J.,Bohm, A.,Skiba, N.P.,Hamm, H.E.,Sigler, P.B.
      (1996) Nature 379: 311
    • The 2.2 A Crystal Structure of Transducin-Alpha Complexed with GTP Gamma S
      Noel, J.P.,Hamm, H.E.,Sigler, P.B.
      (1993) Nature 366: 654
    • Structural Determinants for Activation of the Alpha-Subunit of a Heterotrimeric G Protein
      Lambright, D.G.,Noel, J.P.,Hamm, H.E.,Sigler, P.B.
      (1994) Nature 369: 621
    • Gtpase Mechanism of Gproteins from the 1.7-A Crystal Structure of Transducin Alpha-Gdp-Aif-4
      Sondek, J.,Lambright, D.G.,Noel, J.P.,Hamm, H.E.,Sigler, P.B.
      (1994) Nature 372: 276


    Organizational Affiliation

    Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06510, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRANSDUCIN
A, B, C, D
340Bos taurusMutation(s): 0 
Gene Names: GNB1
Find proteins for P62871 (Bos taurus)
Go to Gene View: GNB1
Go to UniProtKB:  P62871
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TRANSDUCIN
E, F, G, H
68Bos taurusMutation(s): 0 
Gene Names: GNGT1
Find proteins for P02698 (Bos taurus)
Go to Gene View: GNGT1
Go to UniProtKB:  P02698
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.306 
  • R-Value Work: 0.200 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 85.100α = 90.00
b = 94.000β = 90.00
c = 194.700γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
X-PLORrefinement
X-PLORmodel building
DENZOdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-04-01
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance