1GG2

G PROTEIN HETEROTRIMER MUTANT GI_ALPHA_1(G203A) BETA_1 GAMMA_2 WITH GDP BOUND

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

The structure of the G protein heterotrimer Gi alpha 1 beta 1 gamma 2.

Wall, M.A., Coleman, D.E., Lee, E., Iniguez-Lluhi, J.A., Posner, B.A., Gilman, A.G., Sprang, S.R.

(1995) Cell 83: 1047-1058

  • DOI: 10.1016/0092-8674(95)90220-1
  • Primary Citation of Related Structures:  
    1GG2, 1GP2

  • PubMed Abstract: 

    • The crystallographic structure of the G protein heterotrimer Gi alpha 1(GDP)beta 1 gamma 2 (at 2.3 A) reveals two nonoverlapping regions of contact between alpha and beta, an extended interface between beta and nearly all of gamma, and limited interaction of alpha with gamma ...

    The crystallographic structure of the G protein heterotrimer Gi alpha 1(GDP)beta 1 gamma 2 (at 2.3 A) reveals two nonoverlapping regions of contact between alpha and beta, an extended interface between beta and nearly all of gamma, and limited interaction of alpha with gamma. The major alpha/beta interface covers switch II of alpha, and GTP-induced rearrangement of switch II causes subunit dissociation during signaling. Alterations in GDP binding in the heterotrimer (compared with alpha-GDP) explain stabilization of the inactive conformation of alpha by beta gamma. Repeated WD motifs in beta form a circularized sevenfold beta propeller. The conserved cores of these motifs are a scaffold for display of their more variable linkers on the exterior face of each propeller blade.

    Organizational Affiliation: 

    Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas 75235, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
G PROTEIN GI ALPHA 1A353Rattus norvegicusMutation(s): 1 
Gene Names: Gnai1, Gnai-1
UniProt
Find proteins for P10824 (Rattus norvegicus)
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Go to UniProtKB:  P10824
Entity Groups  
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UniProt GroupP10824
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
G PROTEIN GI BETA 1B340Bos taurusMutation(s): 0 
Gene Names: GNB1
UniProt
Find proteins for P62871 (Bos taurus)
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Go to UniProtKB:  P62871
Entity Groups  
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UniProt GroupP62871
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
G PROTEIN GI GAMMA 2C [auth G]71Bos taurusMutation(s): 0 
Gene Names: GNG2
UniProt
Find proteins for P63212 (Bos taurus)
Explore P63212 
Go to UniProtKB:  P63212
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP63212
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP
Download Ideal Coordinates CCD File 
D [auth A]GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 
  • Space Group: P 43
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.776α = 90
b = 83.776β = 90
c = 130.938γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-02-12
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-11-03
    Changes: Database references, Derived calculations, Other