1GOT

HETEROTRIMERIC COMPLEX OF A GT-ALPHA/GI-ALPHA CHIMERA AND THE GT-BETA-GAMMA SUBUNITS

• PDB DOI: https://doi.org/10.2210/pdb1GOT/pdb

• Classification: COMPLEX (GTP-BINDING/TRANSDUCER)
• Organism(s): Bos taurus
• Expression System: Escherichia coli
• Mutation(s): Yes 
• Membrane Protein: Yes  OPM


• Deposited: 1996-08-07 Released: 1997-03-12 
• Deposition Author(s): Lambright, D.G., Sondek, J., Bohm, A., Skiba, N.P., Hamm, H.E., Sigler, P.B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.295 
• R-Value Work: 0.207 
• R-Value Observed: 0.207 

Literature

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: 311-319

• PubMed: 8552184 
• DOI: https://doi.org/10.1038/379311a0
• Primary Citation of Related Structures:  
  1GOT


• PubMed Abstract: 
  

  The structure of a heterotrimeric G protein reveals the mechanism of the nucleotide-dependent engagement of the alpha and beta gamma subunits that regulates their interaction with receptor and effector molecules. The interaction involves two distinct interfaces and dramatically alters the conformation of the alpha but not of the beta gamma subunits. The location of the known sites for post-translational modification and receptor coupling suggest a plausible orientation with respect to the membrane surface and an activated heptahelical receptor.

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Organizational Affiliation: 

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

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 

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

Macromolecule Content

• Total Structure Weight: 87.14 kDa 
• Atom Count: 6,448 
• Modelled Residue Count: 735 
• Deposited Residue Count: 763 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
GT-ALPHA/GI-ALPHA CHIMERA	A	350	Bos taurus	Mutation(s): 9  Membrane Entity: Yes
UniProt
Find proteins for P04695 (Bos taurus) Explore P04695  Go to UniProtKB:  P04695

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
GT-BETA	B	340	Bos taurus	Mutation(s): 0
UniProt
Find proteins for P62871 (Bos taurus) Explore P62871  Go to UniProtKB:  P62871

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
GT-GAMMA	C [auth G]	73	Bos taurus	Mutation(s): 0  Membrane Entity: Yes
UniProt
Find proteins for P02698 (Bos taurus) Explore P02698  Go to UniProtKB:  P02698

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GDP	D [auth G]	GUANOSINE-5'-DIPHOSPHATE C10 H15 N5 O11 P2 QGWNDRXFNXRZMB-UUOKFMHZSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.295 
• R-Value Work: 0.207 
• R-Value Observed: 0.207 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 133.4	α = 90
b = 91.4	β = 120.1
c = 83.2	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-03-12 
Deposition Author(s): Lambright, D.G., Sondek, J., Bohm, A., Skiba, N.P., Hamm, H.E., Sigler, P.B.

Revision History  

• Version 1.0: 1997-03-12
  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: 2024-10-16
  Changes: Data collection, Database references, Derived calculations, Structure summary