3UGU

Crystal Structure of p44 (Splice Variant of Visual Arrestin)

• PDB DOI: https://doi.org/10.2210/pdb3UGU/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Bos taurus
• Expression System: Saccharomyces cerevisiae
• Mutation(s): No 


• Deposited: 2011-11-03 Released: 2012-02-08 
• Deposition Author(s): Batra-Safferling, R., Granzin, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.85 Å
• R-Value Free: 0.214 
• R-Value Work: 0.174 
• R-Value Observed: 0.176 

Literature

Crystal Structure of p44, a Constitutively Active Splice Variant of Visual Arrestin.

Granzin, J., Cousin, A., Weirauch, M., Schlesinger, R., Buldt, G., Batra-Safferling, R.

(2012) J Mol Biol 416: 611-618

• PubMed: 22306737 
• DOI: https://doi.org/10.1016/j.jmb.2012.01.028
• Primary Citation of Related Structures:  
  3UGU, 3UGX


• PubMed Abstract: 
  

  Visual arrestin specifically binds to photoactivated and phosphorylated rhodopsin and inactivates phototransduction. In contrast, the p44 splice variant can terminate phototransduction by binding to nonphosphorylated light-activated rhodopsin. Here we report the crystal structure of bovine p44 at a resolution of 1.85 Å. Compared to native arrestin, the p44 structure reveals significant differences in regions crucial for receptor binding, namely flexible loop V-VI and polar core regions. Additionally, electrostatic potential is remarkably positive on the N-domain and the C-domain. The p44 structure represents an active conformation that serves as a model to explain the 'constitutive activity' found in arrestin variants.

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Organizational Affiliation: 

Institute of Complex Systems, ICS-6: Structural Biochemistry, Forschungszentrum Jülich, 52425 Jülich, Germany.

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 42.42 kDa 
• Atom Count: 3,116 
• Modelled Residue Count: 345 
• Deposited Residue Count: 380 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
S-arrestin	A	380	Bos taurus	Mutation(s): 0  Gene Names: SAG
UniProt
Find proteins for P08168 (Bos taurus) Explore P08168  Go to UniProtKB:  P08168

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.85 Å
• R-Value Free: 0.214 
• R-Value Work: 0.174 
• R-Value Observed: 0.176 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 66.964	α = 90
b = 71.583	β = 90
c = 79.7	γ = 90

Software Package:

Software Name	Purpose
ADSC	data collection
MOLREP	phasing
PHENIX	refinement
MOSFLM	data reduction
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-02-08 
Deposition Author(s): Batra-Safferling, R., Granzin, J.

Revision History  

• Version 1.0: 2012-02-08
  Type: Initial release
  
• Version 1.1: 2012-02-15
  Changes: Structure summary
• Version 1.2: 2012-03-21
  Changes: Database references
• Version 1.3: 2024-02-28
  Changes: Data collection, Database references