6MQZ

Crystal Structure of the 13-cis Product of the All-trans Retinal-Bound R111K:Y134F:T54V:R132Q:P39Y:R59Y:L121E Mutant of Human Cellular Retinoic Acid Binding Protein II Irradiated with 400 nm Laser (5 minutes) at 2.07 Angstrom


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.07 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.198 

wwPDB Validation 3D Report Full Report


This is version 1.2 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:  
    6MOQ, 6MOP, 6MOR, 6MOV, 6MPK, 6MOX, 6MQW, 6MQY, 6MQX, 6MQJ

  • 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 microbial rhodopsin mimic, based on an orthogonal protein system, would illuminate the design elements required to generate new photoactive proteins with novel function ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cellular retinoic acid-binding protein 2A137Homo sapiensMutation(s): 7 
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
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
RET
Query on RET

Download CCD File 
A
RETINAL
C20 H28 O
NCYCYZXNIZJOKI-OVSJKPMPSA-N
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.07 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.198 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.567α = 90
b = 58.567β = 90
c = 98.974γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United States--

Revision History 

  • Version 1.0: 2019-01-09
    Type: Initial release
  • Version 1.1: 2019-02-13
    Changes: Data collection, Database references
  • Version 1.2: 2019-12-18
    Changes: Author supporting evidence