4CJ6

Crystal structure of the complex of the Cellular Retinal Binding Protein Mutant R234W with 9-cis-retinal


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.896 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.165 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Human Cellular Retinaldehyde-Binding Protein Has Secondary Thermal 9-Cis-Retinal Isomerase Activity.

Bolze, C.S.Helbling, R.E.Owen, R.L.Pearson, A.R.Pompidor, G.Dworkowski, F.Fuchs, M.R.Furrer, J.Golczak, M.Palczewski, K.Cascella, M.Stocker, A.

(2014) J.Am.Chem.Soc. 136: 137

  • DOI: 10.1021/ja411366w
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cellular retinaldehyde-binding protein (CRALBP) chaperones 11-cis-retinal to convert opsin receptor molecules into photosensitive retinoid pigments of the eye. We report a thermal secondary isomerase activity of CRALBP when bound to 9-cis-retinal. UV ...

    Cellular retinaldehyde-binding protein (CRALBP) chaperones 11-cis-retinal to convert opsin receptor molecules into photosensitive retinoid pigments of the eye. We report a thermal secondary isomerase activity of CRALBP when bound to 9-cis-retinal. UV/vis and (1)H NMR spectroscopy were used to characterize the product as 9,13-dicis-retinal. The X-ray structure of the CRALBP mutant R234W:9-cis-retinal complex at 1.9 Å resolution revealed a niche in the binding pocket for 9-cis-aldehyde different from that reported for 11-cis-retinal. Combined computational, kinetic, and structural data lead us to propose an isomerization mechanism catalyzed by a network of buried waters. Our findings highlight a specific role of water molecules in both CRALBP-assisted specificity toward 9-cis-retinal and its thermal isomerase activity yielding 9,13-dicis-retinal. Kinetic data from two point mutants of CRALBP support an essential role of Glu202 as the initial proton donor in this isomerization reaction.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, and ‡Graduate School for Cellular and Biomedical Sciences, University of Bern , Freiestrasse 3, 3012 Bern, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RETINALDEHYDE-BINDING PROTEIN 1
A
317Homo sapiensMutation(s): 0 
Gene Names: RLBP1 (CRALBP)
Find proteins for P12271 (Homo sapiens)
Go to Gene View: RLBP1
Go to UniProtKB:  P12271
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
RET
Query on RET

Download SDF File 
Download CCD File 
A
RETINAL
C20 H28 O
NCYCYZXNIZJOKI-OVSJKPMPSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.896 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.165 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 87.870α = 90.00
b = 57.918β = 122.88
c = 75.206γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
SCALEPACKdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-01-08
    Type: Initial release
  • Version 1.1: 2014-01-22
    Type: Database references