Biological Assembly 1  

 3D View: Structure

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 33510.38 
• Atom Count: 2340 
• Residue Count: 302 
• Unique protein chains: 1

1J7X

CRYSTAL STRUCTURE OF A FUNCTIONAL UNIT OF INTERPHOTORECEPTOR RETINOID-BINDING PROTEIN (IRBP)

• DOI: 10.2210/pdb1J7X/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Xenopus laevis
• Expression System: Escherichia coli


• Deposited: 2001-05-19 Released: 2002-02-20 
• Deposition Author(s): Loew, A., Gonzalez-Fernandez, F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.8 Å
• R-Value Free: 0.220 
• R-Value Work: 0.205 

Literature

Crystal structure of the functional unit of interphotoreceptor retinoid binding protein.

Loew, A., Gonzalez-Fernandez, F.

(2002) Structure 10: 43-49

• PubMed: 11796109 


• PubMed Abstract: 
  

Interphotoreceptor retinoid binding protein (IRBP), the major soluble component of the interphotoreceptor matrix, is critical to the function, integrity, and development of the vertebrate retina. Although its role is poorly understood, IRBP has been thought to protect 11-cis retinal and all-trans retinol while facilitating their exchange between the photoreceptors and retinal-pigmented epithelium. We determined the X-ray structure of one of the functional units, or modules, of Xenopus laevis IRBP to 1.8 A resolution by multiwavelength anomalous dispersion. The monomeric protein consists of two domains separated by a hydrophobic ligand binding site. A structural homology to the recently solved photosystem II D1 C-terminal-processing protease and the enoyl-CoA isomerase/hydratase family suggests the utility of a common fold used in diverse settings, ranging from proteolysis to fatty acid isomerization to retinoid transport.

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Organizational Affiliation: 

Department of Biochemistry, University of Texas, Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
INTERPHOTORECEPTOR RETINOID-BINDING PROTEIN	A	302	Xenopus laevis	Mutation(s): 0  Gene Names: rbp3
Find proteins for Q7SZI7 (Xenopus laevis) Go to UniProtKB:  Q7SZI7

Small Molecules

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: 1.8 Å
• R-Value Free: 0.220 
• R-Value Work: 0.205 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 63.144	α = 90.00
b = 65.756	β = 90.00
c = 68.174	γ = 90.00

Software Package:

Software Name	Purpose
DENZO	data reduction
REFMAC	refinement
SCALEPACK	data scaling
SOLVE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-05-19 
• Released Date: 2002-02-20 
• Deposition Author(s): Loew, A., Gonzalez-Fernandez, F.

Revision History 

• Version 1.0: 2002-02-20
  Type: Initial release
• Version 1.1: 2008-04-27
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance