6MQW

Crystal Structure of All-trans Retinal-Bound R111K:Y134F:T54V:R132Q:P39Y:R59Y:L121E Human Cellular Retinoic Acid Binding Protein II Irradiated with 400 nm laser (30 seconds) and subsequently dark adapted (10 minutes) at 2.1 Angstrom Resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.09 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Mimicking Microbial Rhodopsin Isomerization in a Single Crystal.

Ghanbarpour, A.Nairat, M.Nosrati, M.Santos, E.M.Vasileiou, C.Dantus, M.Borhan, B.Geiger, J.H.

(2019) J. Am. Chem. Soc. 141: 1735-1741

  • DOI: 10.1021/jacs.8b12493
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Bacteriorhodopsin represents the simplest, and possibly most abundant, phototropic system requiring only a retinal-bound transmembrane protein to convert photons of light to an energy-generating proton gradient. The creation and interrogation of a mi ...

    Bacteriorhodopsin represents the simplest, and possibly most abundant, phototropic system requiring only a retinal-bound transmembrane protein to convert photons of light to an energy-generating proton gradient. The creation and interrogation of a microbial rhodopsin mimic, based on an orthogonal protein system, would illuminate the design elements required to generate new photoactive proteins with novel function. We describe a microbial rhodopsin mimic, created using a small soluble protein as a template, that specifically photoisomerizes all- trans to 13- cis retinal followed by thermal relaxation to the all- trans isomer, mimicking the bacteriorhodopsin photocycle, in a single crystal. The key element for selective isomerization is a tuned steric interaction between the chromophore and protein, similar to that seen in the microbial rhodopsins. It is further demonstrated that a single mutation converts the system to a protein photoswitch without chromophore photoisomerization or conformational change.


    Organizational Affiliation

    Michigan State University , Department of Chemistry , East Lansing , Michigan 48824 , United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cellular retinoic acid-binding protein 2
A
137Homo sapiensMutation(s): 7 
Gene Names: CRABP2
Find proteins for P29373 (Homo sapiens)
Go to Gene View: CRABP2
Go to UniProtKB:  P29373
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: 2.09 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.183 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 58.586α = 90.00
b = 58.586β = 90.00
c = 100.178γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
PHASERphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Human Genome Research InstituteUnited States--

Revision History 

  • Version 1.0: 2019-01-09
    Type: Initial release
  • Version 1.1: 2019-02-13
    Type: Data collection, Database references