6MPK

Crystal Structure of the 13-cis Retinal-Bound R111K:Y134F:T54V:R132Q:P39Y:R59Y:L121E:A32Y Mutant of Human Cellular Retinoic Acid Binding Protein II in the Dark at 1.58 Angstrom Resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.58 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.204 

Starting Model: experimental
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This is version 1.4 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: https://doi.org/10.1021/jacs.8b12493
  • Primary Citation of Related Structures:  
    6MOP, 6MOQ, 6MOR, 6MOV, 6MOX, 6MPK, 6MQI, 6MQJ, 6MQW, 6MQX, 6MQY, 6MQZ, 6MR0

  • 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. 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)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cellular retinoic acid-binding protein 2137Homo sapiensMutation(s): 8 
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 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP29373
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.58 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.204 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.761α = 90
b = 58.761β = 90
c = 99.174γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


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

Revision History  (Full details and data files)

  • 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
  • Version 1.3: 2023-10-11
    Changes: Data collection, Database references, Refinement description
  • Version 1.4: 2024-10-23
    Changes: Structure summary