Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - ABC 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 85987.07 
• Atom Count: 5808 
• Residue Count: 764 
• Unique protein chains: 3

1GG2

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

• DOI: 10.2210/pdb1GG2/pdb

• Classification: COMPLEX (GTP-BINDING/TRANSDUCER)
• Organism(s): Bos taurus, Rattus norvegicus
• Expression System: Spodoptera frugiperda, Escherichia coli
• Mutation(s): 1 


• Deposited: 1996-11-13 Released: 1997-02-12 
• Deposition Author(s): Wall, M.A., Sprang, S.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.4 Å
• R-Value Free: 0.289 
• R-Value Work: 0.205 

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

• PubMed: 8521505 
• Primary Citation of Related Structures:  
  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 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.

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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
G PROTEIN GI ALPHA 1	A	353	Rattus norvegicus	Mutation(s): 1  Gene Names: Gnai1 (Gnai-1)
Find proteins for P10824 (Rattus norvegicus) Go to UniProtKB:  P10824

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
G PROTEIN GI BETA 1	B	340	Bos taurus	Mutation(s): 0  Gene Names: GNB1
Find proteins for P62871 (Bos taurus) Go to Gene View: GNB1 Go to UniProtKB:  P62871

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
G PROTEIN GI GAMMA 2	G	71	Bos taurus	Mutation(s): 0  Gene Names: GNG2
Find proteins for P63212 (Bos taurus) Go to Gene View: GNG2 Go to UniProtKB:  P63212

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
GDP	A	GUANOSINE-5'-DIPHOSPHATE C10 H15 N5 O11 P2 QGWNDRXFNXRZMB-UUOKFMHZSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.4 Å
• R-Value Free: 0.289 
• R-Value Work: 0.205 
• Space Group: P 4₃

Unit Cell:

Length (Å)	Angle (°)
a = 83.776	α = 90.00
b = 83.776	β = 90.00
c = 130.938	γ = 90.00

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	phasing
X-PLOR	model building
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1996-11-13 
• Released Date: 1997-02-12 
• Deposition Author(s): Wall, M.A., Sprang, S.R.

Revision History 

• Version 1.0: 1997-02-12
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance