3I17

Crystal structure of the apo R132K:L121E mutant of cellular retinoic acid-binding protein II at 1.68 angstrom resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Elucidating the exact role of engineered CRABPII residues for the formation of a retinal protonated Schiff base.

Vasileiou, C.Wang, W.Jia, X.Lee, K.S.Watson, C.T.Geiger, J.H.Borhan, B.

(2009) Proteins 77: 812-822

  • DOI: 10.1002/prot.22495
  • Primary Citation of Related Structures:  
    3I17

  • PubMed Abstract: 
  • Cellular Retinoic Acid Binding Protein II (CRABPII) has been reengineered to specifically bind and react with all-trans-retinal to form a protonated Schiff base. Each step of this process has been dissected and four residues (Lys132, Tyr134, Arg111, ...

    Cellular Retinoic Acid Binding Protein II (CRABPII) has been reengineered to specifically bind and react with all-trans-retinal to form a protonated Schiff base. Each step of this process has been dissected and four residues (Lys132, Tyr134, Arg111, and Glu121) within the CRABPII binding site have been identified as crucial for imine formation and/or protonation. The precise role of each residue has been examined through site directed mutagenesis and crystallographic studies. The crystal structure of the R132K:L121E-CRABPII (PDB-3I17) double mutant suggests a direct interaction between engineered Glu121 and the native Arg111, which is critical for both Schiff base formation and protonation.


    Organizational Affiliation

    Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cellular retinoic acid-binding protein 2AB137Homo sapiensMutation(s): 2 
Gene Names: CRABP2
Find proteins for P29373 (Homo sapiens)
Explore P29373 
Go to UniProtKB:  P29373
NIH Common Fund Data Resources
PHAROS  P29373
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.183 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 34.699α = 105.8
b = 37.271β = 106.44
c = 60.371γ = 89.97
Software Package:
Software NamePurpose
HKL-2000data collection
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2016-12-28
    Changes: Structure summary