5DTL

Crystal structure of mEos2-A69T fluorescent protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Arginine 66 Controls Dark-State Formation in Green-to-Red Photoconvertible Fluorescent Proteins.

Berardozzi, R.Adam, V.Martins, A.Bourgeois, D.

(2016) J.Am.Chem.Soc. 138: 558-565

  • DOI: 10.1021/jacs.5b09923

  • PubMed Abstract: 
  • Photoactivated localization microscopy (PALM) is a powerful technique to investigate cellular nanostructures quantitatively and dynamically. However, the use of PALM for molecular counting or single-particle tracking remains limited by the propensity ...

    Photoactivated localization microscopy (PALM) is a powerful technique to investigate cellular nanostructures quantitatively and dynamically. However, the use of PALM for molecular counting or single-particle tracking remains limited by the propensity of photoconvertible fluorescent protein markers (PCFPs) to repeatedly enter dark states. By designing the single mutants mEos2-A69T and Dendra2-T69A, we completely swapped the blinking behaviors of mEos2 and Dendra2, two popular PCFPs. We combined X-ray crystallography and single-molecule microscopy to show that blinking in mEos2 and Dendra2 is largely controlled by the orientation of arginine 66, a highly conserved residue in Anthozoan PCFPs. The Arg66 side-chain conformation affects the bleaching and the on-to-off transition quantum yields, as well as the fraction of molecules entering long-lived dark states, resulting in widely different apparent blinking behaviors that largely modulate the efficiency of current blinking correction procedures. The present work provides mechanistic insight into the complex photophysics of Anthozoan PCFPs and will facilitate future engineering of bright and low-blinking variants suitable for PALM.


    Organizational Affiliation

    Institut de Biologie Structurale, Université Grenoble Alpes , CEA, CNRS, 38044 Grenoble, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Green to red photoconvertible GPF-like protein EosFP
A, B, C, D, E, F, G, H, I, J, K, L
226Lobophyllia hemprichiiMutation(s): 7 
Find proteins for Q5S6Z9 (Lobophyllia hemprichii)
Go to UniProtKB:  Q5S6Z9
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CR8
Query on CR8
A, B, C, D, E, F, G, H, I, J, K, L
L-PEPTIDE LINKINGC17 H16 N5 O4HIS, TYR, GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.211 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 73.370α = 91.68
b = 96.500β = 107.83
c = 100.060γ = 97.38
Software Package:
Software NamePurpose
XDSdata reduction
REFMACrefinement
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-12-30
    Type: Initial release
  • Version 1.1: 2016-01-13
    Type: Database references
  • Version 1.2: 2016-01-27
    Type: Database references