1CRB

CRYSTALLOGRAPHIC STUDIES ON A FAMILY OF CELLULAR LIPOPHILIC TRANSPORT PROTEINS. REFINEMENT OF P2 MYELIN PROTEIN AND THE STRUCTURE DETERMINATION AND REFINEMENT OF CELLULAR RETINOL-BINDING PROTEIN IN COMPLEX WITH ALL-TRANS-RETINOL


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.188 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Crystallographic studies on a family of cellular lipophilic transport proteins. Refinement of P2 myelin protein and the structure determination and refinement of cellular retinol-binding protein in complex with all-trans-retinol.

Cowan, S.W.Newcomer, M.E.Jones, T.A.

(1993) J Mol Biol 230: 1225-1246

  • DOI: 10.1006/jmbi.1993.1238
  • Primary Citation of Related Structures:  
    1CRB, 1PMP

  • PubMed Abstract: 
  • P2 myelin protein (P2) and cellular retinol binding protein (CRBP) are members of a family of cellular lipophilic transport proteins. P2 has been refined at a resolution of 2.7 A, and CRBP has been solved by molecular replacement and refined to a resolution of 2 ...

    P2 myelin protein (P2) and cellular retinol binding protein (CRBP) are members of a family of cellular lipophilic transport proteins. P2 has been refined at a resolution of 2.7 A, and CRBP has been solved by molecular replacement and refined to a resolution of 2.1 A. The members of this family form a compact three-dimensional structure built up from ten antiparallel strands that fold to form an orthogonal barrel containing the ligand. In P2, the carboxylate group of an oleic acid ligand interacts with the side-chains of two arginine (106 and 126), and one tyrosine (128) residues. The ligand adopts a U-shaped conformation. In CRBP, the all-trans-retinol has a planar conformation with its alcohol group hydrogen bonding to the side-chain of glutamine 108 (equivalent to residue 106 in P2). The local interactions of glutamine 108 explain CRBP's preference for binding retinol rather than retinal. The side-chain of lysine 40 makes a close contact with the isoprene tail of the retinol.


    Related Citations: 
    • Lipid-Binding Proteins: A Family of Fatty Acid and Retinoid Transport Proteins
      Banaszak, L., Winter, N., Xu, Z., Bernlohr, D.A., Cowan, S., Jones, T.A.
      (1994) Adv Protein Chem 45: 89
    • The Primary Structure of Piscine (Oncorhynchus Mykiss) Retinol-Binding Protein and a Comparison with the Three-Dimensional Structure of Mammalian Retinol-Binding Protein
      Zapponi, M.C., Zanotti, G., Stoppini, M., Berni, R.
      (1992) Eur J Biochem 210: 937
    • Crystallographic Refinement of Human Serum Retinol Binding Protein at 2 Angstroms Resolution
      Cowan, S.W., Newcomer, M.E., Jones, T.A.
      (1990) Proteins 8: 44
    • Crystallization of and Preliminary X-Ray Data for an Intracellular Vitamin A-Binding Protein from Rat Liver
      Newcomer, M.E., Liljas, A., Eriksson, V., Sundelin, J., Rask, L., Peterson, P.A.
      (1981) J Biol Chem 256: 8162

    Organizational Affiliation

    Department of Molecular Biology, Uppsala University Biomedical Centre, Sweden.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CELLULAR RETINOL BINDING PROTEINA134Rattus rattusMutation(s): 0 
UniProt
Find proteins for P02696 (Rattus norvegicus)
Explore P02696 
Go to UniProtKB:  P02696
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
RTL (Subject of Investigation/LOI)
Query on RTL

Download Ideal Coordinates CCD File 
D [auth A]RETINOL
C20 H30 O
FPIPGXGPPPQFEQ-OVSJKPMPSA-N
 Ligand Interaction
CD
Query on CD

Download Ideal Coordinates CCD File 
B [auth A], C [auth A]CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.188 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.09α = 90
b = 47.39β = 90
c = 69.34γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1994-12-20
    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