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 

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

  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cellular retinoic acid-binding protein 2
B, A
137Homo sapiensMutation(s): 2 
Gene Names: CRABP2
Find proteins for P29373 (Homo sapiens)
Go to Gene View: CRABP2
Go to UniProtKB:  P29373
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.180 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 34.699α = 105.80
b = 37.271β = 106.44
c = 60.371γ = 89.97
Software Package:
Software NamePurpose
HKL-2000data reduction
MOLREPphasing
HKL-2000data scaling
REFMACrefinement
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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