1TND

THE 2.2 ANGSTROMS CRYSTAL STRUCTURE OF TRANSDUCIN-ALPHA COMPLEXED WITH GTP GAMMA S

• PDB DOI: https://doi.org/10.2210/pdb1TND/pdb

• Classification: BINDING PROTEIN(GTP)
• Organism(s): Bos taurus
• Mutation(s): No 


• Deposited: 1994-03-31 Released: 1994-07-31 
• Deposition Author(s): Noel, J.P., Hamm, H.E., Sigler, P.B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Work: 0.190 
• R-Value Observed: 0.190 

Literature

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: 654-663

• PubMed: 8259210 
• DOI: https://doi.org/10.1038/366654a0
• Primary Citation of Related Structures:  
  1TND


• PubMed Abstract: 
  

  The 2.2 A crystal structure of activated rod transducin, Gt alpha.GTP gamma S, shows the bound GTP gamma S molecule occluded deep in a cleft between a domain structurally homologous to small GTPases and a helical domain unique to heterotrimeric G proteins. The structure, when combined with biochemical and genetic studies, suggests: how an activated receptor might open this cleft to allow nucleotide exchange; a mechanism for GTP-induced changes in effector and receptor binding surfaces; and a mechanism for GTPase activity not evident from previous data.

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Organizational Affiliation: 

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

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Biological Assembly 3  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 3 assigned by authors.

Macromolecule Content

• Total Structure Weight: 113.94 kDa 
• Atom Count: 8,599 
• Modelled Residue Count: 955 
• Deposited Residue Count: 972 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TRANSDUCIN	A, B, C	324	Bos taurus	Mutation(s): 0
UniProt
Find proteins for P04695 (Bos taurus) Explore P04695  Go to UniProtKB:  P04695

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GSP	G [auth A], K [auth B], O [auth C]	5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE C10 H16 N5 O13 P3 S XOFLBQFBSOEHOG-UUOKFMHZSA-N
CAC	E [auth A], F [auth A], I [auth B], J [auth B], M [auth C], N [auth C]	CACODYLATE ION C2 H6 As O2 OGGXGZAMXPVRFZ-UHFFFAOYSA-M
MG	D [auth A], H [auth B], L [auth C]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Work: 0.190 
• R-Value Observed: 0.190 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 74.5	α = 90
b = 108.3	β = 112.3
c = 79	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1994-07-31 
Deposition Author(s): Noel, J.P., Hamm, H.E., Sigler, P.B.

Revision History  

• Version 1.0: 1994-07-31
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 1.3: 2017-11-29
  Changes: Derived calculations, Other
• Version 1.4: 2024-02-14
  Changes: Data collection, Database references, Derived calculations