4XB4

Structure of the N-terminal domain of OCP binding canthaxanthin

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.54 Å
  • R-Value Free: 0.160 
  • R-Value Work: 0.147 
  • R-Value Observed: 0.148 

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


Literature

PHOTOSYNTHESIS. A 12 angstrom carotenoid translocation in a photoswitch associated with cyanobacterial photoprotection.

Leverenz, R.L., Sutter, M., Wilson, A., Gupta, S., Thurotte, A., Bourcier de Carbon, C., Petzold, C.J., Ralston, C., Perreau, F., Kirilovsky, D., Kerfeld, C.A.

(2015) Science 348: 1463-1466

  • DOI: 10.1126/science.aaa7234
  • Primary Citation of Related Structures:  
    4XB4, 4XB5

  • PubMed Abstract: 

    • Pigment-protein and pigment-pigment interactions are of fundamental importance to the light-harvesting and photoprotective functions essential to oxygenic photosynthesis. The orange carotenoid protein (OCP) functions as both a sensor of light and effector of photoprotective energy dissipation in cyanobacteria ...

    Pigment-protein and pigment-pigment interactions are of fundamental importance to the light-harvesting and photoprotective functions essential to oxygenic photosynthesis. The orange carotenoid protein (OCP) functions as both a sensor of light and effector of photoprotective energy dissipation in cyanobacteria. We report the atomic-resolution structure of an active form of the OCP consisting of the N-terminal domain and a single noncovalently bound carotenoid pigment. The crystal structure, combined with additional solution-state structural data, reveals that OCP photoactivation is accompanied by a 12 angstrom translocation of the pigment within the protein and a reconfiguration of carotenoid-protein interactions. Our results identify the origin of the photochromic changes in the OCP triggered by light and reveal the structural determinants required for interaction with the light-harvesting antenna during photoprotection.

    Organizational Affiliation: 

    MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA. Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, USA. ckerfeld@lbl.gov.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Orange carotenoid-binding proteinA, B152Synechocystis sp. PCC 6803 substr. KazusaMutation(s): 0 
Gene Names: slr1963
UniProt
Find proteins for P74102 (Synechocystis sp. (strain PCC 6803 / Kazusa))
Explore P74102 
Go to UniProtKB:  P74102
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
45D (Subject of Investigation/LOI)
Query on 45D
Download Ideal Coordinates CCD File 
 C [auth A], D [auth B]beta,beta-carotene-4,4'-dione
C40 H52 O2
FDSDTBUPSURDBL-DKLMTRRASA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.54 Å
  • R-Value Free: 0.160 
  • R-Value Work: 0.147 
  • R-Value Observed: 0.148 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.251α = 90
b = 64.112β = 114.89
c = 53.634γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
SCALAdata scaling
XDSdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-07-15
    Type: Initial release
  • Version 1.1: 2015-09-09
    Changes: Data collection
  • Version 1.2: 2015-12-30
    Changes: Non-polymer description
  • Version 1.3: 2017-11-22
    Changes: Derived calculations, Refinement description