2OTB

Crystal structure of a monomeric cyan fluorescent protein in the fluorescent state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.79 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.6 of the entry. See complete history


Literature

Structural basis for reversible photobleaching of a green fluorescent protein homologue.

Henderson, J.N.Ai, H.W.Campbell, R.E.Remington, S.J.

(2007) Proc Natl Acad Sci U S A 104: 6672-6677

  • DOI: https://doi.org/10.1073/pnas.0700059104
  • Primary Citation of Related Structures:  
    2OTB, 2OTE

  • PubMed Abstract: 

    Fluorescent protein (FP) variants that can be reversibly converted between fluorescent and nonfluorescent states have proven to be a catalyst for innovation in the field of fluorescence microscopy. However, the structural basis of the process remains poorly understood. High-resolution structures of a FP derived from Clavularia in both the fluorescent and the light-induced nonfluorescent states reveal that the rapid and complete loss of fluorescence observed upon illumination with 450-nm light results from cis-trans isomerization of the chromophore. The photoinduced change in configuration from the well ordered cis isomer to the highly nonplanar and disordered trans isomer is accompanied by a dramatic rearrangement of internal side chains. Taken together, the structures provide an explanation for the loss of fluorescence upon illumination, the slow light-independent recovery, and the rapid light-induced recovery of fluorescence. The fundamental mechanism appears to be common to all of the photoactivatable and reversibly photoswitchable FPs reported to date.


  • Organizational Affiliation

    Departments of Chemistry and Physics, and Institute of Molecular Biology, University of Oregon, Eugene, OR 97403, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
GFP-like fluorescent chromoprotein cFP484
A, B
214Clavularia sp.Mutation(s): 21 
Gene Names: cFP484
UniProt
Find proteins for Q9U6Y3 (Clavularia sp.)
Explore Q9U6Y3 
Go to UniProtKB:  Q9U6Y3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9U6Y3
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
PIA
Query on PIA
A, B
L-PEPTIDE LINKINGC14 H15 N3 O4ALA, TYR, GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.79 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.016α = 90
b = 67.736β = 90
c = 95.382γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
EPMRphasing
TNTrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-04-03
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2012-02-22
    Changes: Other
  • Version 1.4: 2017-10-18
    Changes: Refinement description
  • Version 1.5: 2023-08-30
    Changes: Data collection, Database references, Derived calculations, Refinement description
  • Version 1.6: 2023-11-15
    Changes: Data collection