1OPA

THE CRYSTAL STRUCTURES OF HOLO-AND APO-CELLULAR RETINOL BINDING PROTEIN II


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Work: 0.200 
  • R-Value Observed: 0.200 

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This is version 1.3 of the entry. See complete history


Literature

Crystal structures of holo and apo-cellular retinol-binding protein II.

Winter, N.S.Bratt, J.M.Banaszak, L.J.

(1993) J Mol Biol 230: 1247-1259

  • DOI: 10.1006/jmbi.1993.1239
  • Primary Citation of Related Structures:  
    1OPB, 1OPA

  • PubMed Abstract: 
  • Apo and holo-cellular retinol-binding protein II have been crystallized, and their crystal structures have been determined to 2.1 A and 1.9 A respectively. The apo and holo-crystals have different but related triclinic space groups. The X-ray phases for both structures were determined using the molecular replacement method ...

    Apo and holo-cellular retinol-binding protein II have been crystallized, and their crystal structures have been determined to 2.1 A and 1.9 A respectively. The apo and holo-crystals have different but related triclinic space groups. The X-ray phases for both structures were determined using the molecular replacement method. The crystal co-ordinates were refined to an R-factor of 0.200 for apo, and 0.173 for holo-cellular retinol-binding protein II. The holo and apo-models have nearly the same tertiary structures. Cellular retinol-binding protein II consists of a ten-stranded anti-parallel beta-barrel with the ligand binding cavity within the barrel. Two alpha-helices cover the open end of the beta-barrel making it almost solvent inaccessible. A single portal large enough to admit a water molecule was observed opening into the binding cavity. Exogenously added retinol was found within the cavity of each holo-cellular retinol-binding protein II molecule. Each retinol was surrounded by both polar and non-polar residues. The hydroxyl group of the bound retinol hydrogen bonds to the amide group of glutamine 108. The overall conformation of the bound retinol was derived from the four different molecules of holo-cellular retinol-binding protein II present in the triclinic form. The four copies of bound retinol had essentially the same conformation as found in crystalline retinaldehyde.


    Organizational Affiliation

    Department of Biochemistry, Medical School, University of Minnesota, Minneapolis 55455.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CELLULAR RETINOL BINDING PROTEIN II AB134Rattus rattusMutation(s): 0 
Find proteins for P06768 (Rattus norvegicus)
Explore P06768 
Go to UniProtKB:  P06768
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Work: 0.200 
  • R-Value Observed: 0.200 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 36.9α = 93.8
b = 64.5β = 113.3
c = 30γ = 89.9
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1993-10-31
    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: 2017-11-29
    Changes: Derived calculations, Other