3GJ2

Photoactivated state of PA-GFP

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.205 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Structure and mechanism of the photoactivatable green fluorescent protein.

Henderson, J.N., Gepshtein, R., Heenan, J.R., Kallio, K., Huppert, D., Remington, S.J.

(2009) J.Am.Chem.Soc. 131: 4176-4177

  • DOI: 10.1021/ja808851n
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Crystal structures of the photoactivatable green fluorescent protein T203H variant (PA-GFP) have been solved in the native and photoactivated states, which under 488 nm illumination are dark and brightly fluorescent, respectively. We demonstrate that ...

    Crystal structures of the photoactivatable green fluorescent protein T203H variant (PA-GFP) have been solved in the native and photoactivated states, which under 488 nm illumination are dark and brightly fluorescent, respectively. We demonstrate that photoactivation of PA-GFP is the result of a UV-induced decarboxylation of the Glu222 side chain that shifts the chromophore equilibrium to the anionic form. Coupled with the T203H mutation, which stabilizes the native PA-GFP neutral chromophore, Glu222 decarboxylation yields a 100-fold contrast enhancement relative to wild-type GFP (WT). Additionally, the structures provide insights into the spectroscopic differences between WT and PA-GFP steady-state fluorescence maxima and excited-state proton transfer dynamics.

    Organizational Affiliation: 

    Institute of Molecular Biology and Department of Physics, University of Oregon, Eugene, Oregon 97403-1229, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Green fluorescent protein
A, B, C, D
231Aequorea victoriaMutation(s): 5 
Gene Names: GFP
Find proteins for P42212 (Aequorea victoria)
Go to UniProtKB:  P42212
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL
Download SDF File 
Download CCD File 
A, B, C
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CRO
Query on CRO
A, B, C, D
L-PEPTIDE LINKINGC15 H17 N3 O5THR, TYR, GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.205 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 84.714α = 90.00
b = 87.069β = 90.00
c = 144.862γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
HKL-2000data collection
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
EPMRphasing

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-03-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-01
    Type: Advisory, Refinement description