4EFG

Crystal Structure of the Q108K:K40L:T51V:T53C:Y19W:R58W:T29L Mutant of Cellular Retinol Binding Protein Type II in Complex with All-trans-Retinal at 1.58 Angstrom Resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.58 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Tuning the electronic absorption of protein-embedded all-trans-retinal.

Wang, W.Nossoni, Z.Berbasova, T.Watson, C.T.Yapici, I.Lee, K.S.Vasileiou, C.Geiger, J.H.Borhan, B.

(2012) Science 338: 1340-1343

  • DOI: 10.1126/science.1226135
  • Primary Citation of Related Structures:  
  • Also Cited By: 5U6G, 4ZR2, 4ZJ0, 4ZH9, 4ZH6

  • PubMed Abstract: 
  • Protein-chromophore interactions are a central component of a wide variety of critical biological processes such as color vision and photosynthesis. To understand the fundamental elements that contribute to spectral tuning of a chromophore inside the ...

    Protein-chromophore interactions are a central component of a wide variety of critical biological processes such as color vision and photosynthesis. To understand the fundamental elements that contribute to spectral tuning of a chromophore inside the protein cavity, we redesigned human cellular retinol binding protein II (hCRBPII) to fully encapsulate all-trans-retinal and form a covalent bond as a protonated Schiff base. This system, using rational mutagenesis designed to alter the electrostatic environment within the binding pocket of the host protein, enabled regulation of the absorption maximum of the pigment in the range of 425 to 644 nanometers. With only nine point mutations, the hCRBPII mutants induced a systematic shift in the absorption profile of all-trans-retinal of more than 200 nanometers across the visible spectrum.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Retinol-binding protein 2
A, B
133Homo sapiensMutation(s): 7 
Gene Names: RBP2 (CRBP2)
Find proteins for P50120 (Homo sapiens)
Go to Gene View: RBP2
Go to UniProtKB:  P50120
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACT
Query on ACT

Download SDF File 
Download CCD File 
A, B
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
RET
Query on RET

Download SDF File 
Download CCD File 
A, B
RETINAL
C20 H28 O
NCYCYZXNIZJOKI-OVSJKPMPSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
RETKd: 55 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.58 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.194 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 30.111α = 90.93
b = 35.905β = 91.21
c = 64.726γ = 114.13
Software Package:
Software NamePurpose
HKL-2000data collection
MOLREPphasing
HKL-2000data reduction
REFMACrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-26
    Type: Initial release