2G7B

Crystal Structure of the R132K:R111L:L121E mutant of Cellular Retinoic Acid Binding Protein Type II In Complex With All-Trans-Retinal At 1.18 Angstroms Resolution

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.18 Å
  • R-Value Free: 0.155 
  • R-Value Work: 0.129 
  • R-Value Observed: 0.130 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

Protein design: reengineering cellular retinoic acid binding protein II into a rhodopsin protein mimic.

Vasileiou, C., Vaezeslami, S., Crist, R.M., Rabago-Smith, M., Geiger, J.H., Borhan, B.

(2007) J Am Chem Soc 129: 6140-6148

  • DOI: 10.1021/ja067546r
  • Primary Citation of Related Structures:  
    2G79, 2G78, 2G7B

  • PubMed Abstract: 

    • Rational redesign of the binding pocket of Cellular Retinoic Acid Binding Protein II (CRABPII) has provided a mutant that can bind retinal as a protonated Schiff base, mimicking the binding observed in rhodopsin. The reengineering was accomplished through a series of choreographed manipulations to ultimately orient the reactive species (the epsilon-amino group of Lys132 and the carbonyl of retinal) in the proper geometry for imine formation ...

    Rational redesign of the binding pocket of Cellular Retinoic Acid Binding Protein II (CRABPII) has provided a mutant that can bind retinal as a protonated Schiff base, mimicking the binding observed in rhodopsin. The reengineering was accomplished through a series of choreographed manipulations to ultimately orient the reactive species (the epsilon-amino group of Lys132 and the carbonyl of retinal) in the proper geometry for imine formation. The guiding principle was to achieve the appropriate Bürgi-Dunitz trajectory for the reaction to ensue. Through crystallographic analysis of protein mutants incapable of forming the requisite Schiff base, a highly ordered water molecule was identified as a key culprit in orienting retinal in a nonconstructive manner. Removal of the ordered water, along with placing reinforcing mutations to favor the desired orientation of retinal, led to a triple mutant CRABPII protein capable of nanomolar binding of retinal as a protonated Schiff base. The high-resolution crystal structure of all-trans-retinal bound to the CRABPII triple mutant (1.2 A resolution) unequivocally illustrates the imine formed between retinal and the protein.

    Related Citations: 
    • determining crystal structures of proteins and protein complexes by X-ray crystallography: X-ray crystallographic studies of the mutants of cellular retinoic acid binding protein type II toward designing a mimic of rhodopsin
      Vaezeslami, S.
      () Thesis --: --
    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 2A137Homo sapiensMutation(s): 3 
Gene Names: CRABP2
UniProt & NIH Common Fund Data Resources
Find proteins for P29373 (Homo sapiens)
Explore P29373 
Go to UniProtKB:  P29373
PHAROS:  P29373
GTEx:  ENSG00000143320
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AZE
Query on AZE
Download Ideal Coordinates CCD File 
 D [auth A]ALL-TRANS AXEROPHTHENE
C20 H30
IDMGVRDNZFQORW-JWBAUCAFSA-N		 Ligand Interaction
NA
Query on NA
Download Ideal Coordinates CCD File 
 B [auth A], C [auth A]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.18 Å
  • R-Value Free: 0.155 
  • R-Value Work: 0.129 
  • R-Value Observed: 0.130 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.459α = 90
b = 45.514β = 90
c = 77.747γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report


View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-04-17
    Type: Initial release
  • Version 1.1: 2008-04-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description