Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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: 71.35 kDa 
• Atom Count: 5067 
• Residue Count: 625 
• Unique protein chains: 3

2TRC

PHOSDUCIN/TRANSDUCIN BETA-GAMMA COMPLEX

• DOI: 10.2210/pdb2TRC/pdb

• Classification: COMPLEX (TRANSDUCER/TRANSDUCTION)
• Organism(s): Bos taurus, Rattus norvegicus
• Mutation(s): Yes 


• Deposited: 1997-01-06 Released: 1997-06-05 
• Deposition Author(s): Gaudet, R., Bohm, A., Sigler, P.B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.277 
• R-Value Work: 0.190 
• R-Value Observed: 0.190 

Literature

Crystal structure at 2.4 angstroms resolution of the complex of transducin betagamma and its regulator, phosducin.

Gaudet, R., Bohm, A., Sigler, P.B.

(1996) Cell 87: 577-588

• PubMed: 8898209 
• DOI: 10.1016/s0092-8674(00)81376-8
• Primary Citation of Related Structures:  
  2TRC


• PubMed Abstract: 
  

The crystal structure of transducin's betagamma subunits complexed with phosducin, which regulates Gtbetagamma activity, has been solved to 2.4 angstroms resolution. Phosducin has two domains that wrap around Gtbetagamma to form an extensive interface. The N-terminal domain binds loops on the "top" Gtbeta surface, overlapping the Gtalpha binding surface, explaining how phosducin blocks Gtbetagamma's interaction with Gtalpha. The C-terminal domain shows structural homology to thioredoxin and binds the outer strands of Gtbeta's seventh and first blades in a manner likely to disrupt Gtbetagamma's normal orientation relative to the membrane and receptor. Phosducin's Ser-73, which when phosphorylated inhibits phosducin's function, points away from Gtbetagamma, toward a large flexible loop. Thus phosphorylation is not likely to affect the interface directly, but rather indirectly through an induced conformational change.

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Related Citations: 

• Crystal Structure of a Ga Protein Beta Gamma Dimer at 2.1A Resolution
  Sondek, J., Bohm, A., Lambright, D.G., Hamm, H.E., Sigler, P.B.
  (1996) Nature 379: 369

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Organizational Affiliation: 

Department of Molecular Biophysics and Biochemistry, Howard Hughes Medical Institute, Yale University, New Haven, Connecticut 06511, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TRANSDUCIN	B	340	Bos taurus	Mutation(s): 0  Gene Names: GNB1
Find proteins for P62871 (Bos taurus) Explore P62871  Go to UniProtKB:  P62871

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
TRANSDUCIN	G	68	Bos taurus	Mutation(s): 0  Gene Names: GNGT1
Find proteins for P02698 (Bos taurus) Explore P02698  Go to UniProtKB:  P02698

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
PHOSDUCIN	P	217	Rattus norvegicus	Mutation(s): 5  Gene Names: Pdc, Rpr1
Find proteins for P20942 (Rattus norvegicus) Explore P20942  Go to UniProtKB:  P20942

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GD	B, P	GADOLINIUM ATOM Gd UIWYJDYFSGRHKR-UHFFFAOYSA-N

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.277 
• R-Value Work: 0.190 
• R-Value Observed: 0.190 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 75.7	α = 90
b = 88.51	β = 90
c = 98.87	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-01-06 
• Released Date: 1997-06-05 
Deposition Author(s): Gaudet, R., Bohm, A., Sigler, P.B.

Revision History 

• Version 1.0: 1997-06-05
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2019-07-17
  Changes: Data collection, Derived calculations, Other, Refinement description
• Version 1.4: 2019-08-14
  Changes: Data collection