Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 96071.64 
• Atom Count: 5706 
• Residue Count: 804 
• Unique protein chains: 1

1AZT

GS-ALPHA COMPLEXED WITH GTP-GAMMA-S

• DOI: 10.2210/pdb1AZT/pdb

• Classification: HYDROLASE
• Organism(s): Bos taurus
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 1997-11-20 Released: 1998-02-25 
• Deposition Author(s): Tesmer, J.J.G., Sprang, S.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.282 
• R-Value Work: 0.219 

Literature

Crystal structure of the adenylyl cyclase activator Gsalpha

Sunahara, R.K., Tesmer, J.J., Gilman, A.G., Sprang, S.R.

(1997) Science 278: 1943-1947

• PubMed: 9395396 


• PubMed Abstract: 
  

The crystal structure of Gsalpha, the heterotrimeric G protein alpha subunit that stimulates adenylyl cyclase, was determined at 2.5 A in a complex with guanosine 5'-O-(3-thiotriphosphate) (GTPgammaS). Gsalpha is the prototypic member of a family of GTP-binding proteins that regulate the activities of effectors in a hormone-dependent manner. Comparison of the structure of Gsalpha.GTPgammaS with that of Gialpha.GTPgammaS suggests that their effector specificity is primarily dictated by the shape of the binding surface formed by the switch II helix and the alpha3-beta5 loop, despite the high sequence homology of these elements. In contrast, sequence divergence explains the inability of regulators of G protein signaling to stimulate the GTPase activity of Gsalpha. The betagamma binding surface of Gsalpha is largely conserved in sequence and structure to that of Gialpha, whereas differences in the surface formed by the carboxyl-terminal helix and the alpha4-beta6 loop may mediate receptor specificity.

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Organizational Affiliation: 

Department of Pharmacology, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75235-9041, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
GS-ALPHA	A, B	402	Bos taurus	Mutation(s): 0  Gene Names: GNAS (GNAS1)
Find proteins for P04896 (Bos taurus) Go to Gene View: GNAS Go to UniProtKB:  P04896

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
PO4	A, B	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K
MG	A, B	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N
GSP	A, B	5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE C10 H16 N5 O13 P3 S XOFLBQFBSOEHOG-UUOKFMHZSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.282 
• R-Value Work: 0.219 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 88.300	α = 90.00
b = 96.500	β = 90.00
c = 133.400	γ = 90.00

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-11-20 
• Released Date: 1998-02-25 
• Deposition Author(s): Tesmer, J.J.G., Sprang, S.R.

Revision History 

• Version 1.0: 1998-02-25
  Type: Initial release
• Version 1.1: 2008-03-03
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance