2YDZ

X-ray structure of the cyan fluorescent protein SCFP3A (K206A mutant)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.59 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.142 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure-Guided Evolution of Cyan Fluorescent Proteins Towards a Quantum Yield of 93%

Goedhart, J.von Stetten, D.Noirclerc-Savoye, M.Lelimousin, M.Joosen, L.Hink, M.A.van Weeren, L.Gadella, T.W.J.Royant, A.

(2012) Nat.Commun 3: 751

  • DOI: 10.1038/ncomms1738
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cyan variants of green fluorescent protein are widely used as donors in Förster resonance energy transfer experiments. The popular, but modestly bright, Enhanced Cyan Fluorescent Protein (ECFP) was sequentially improved into the brighter variants Sup ...

    Cyan variants of green fluorescent protein are widely used as donors in Förster resonance energy transfer experiments. The popular, but modestly bright, Enhanced Cyan Fluorescent Protein (ECFP) was sequentially improved into the brighter variants Super Cyan Fluorescent Protein 3A (SCFP3A) and mTurquoise, the latter exhibiting a high-fluorescence quantum yield and a long mono-exponential fluorescence lifetime. Here we combine X-ray crystallography and excited-state calculations to rationalize these stepwise improvements. The enhancement originates from stabilization of the seventh β-strand and the strengthening of the sole chromophore-stabilizing hydrogen bond. The structural analysis highlighted one suboptimal internal residue, which was subjected to saturation mutagenesis combined with fluorescence lifetime-based screening. This resulted in mTurquoise2, a brighter variant with faster maturation, high photostability, longer mono-exponential lifetime and the highest quantum yield measured for a monomeric fluorescent protein. Together, these properties make mTurquoise2 the preferable cyan variant of green fluorescent protein for long-term imaging and as donor for Förster resonance energy transfer to a yellow fluorescent protein.


    Related Citations: 
    • Cyan and Yellow Super Fluorescent Proteins with Improved Brightness, Protein Folding, and Fret Forster Radius.
      Kremers, G.,Goedhart, J.,van Munster, E.B.,Gadella, T.W.J.J.
      (2006) Biochemistry 45: 6570


    Organizational Affiliation

    Swammerdam Institute for Life Sciences, Section of Molecular Cytology, van Leeuwenhoek Centre for Advanced Microscopy, University of Amsterdam, 1098 XH Amsterdam, The Netherlands.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GREEN FLUORESCENT PROTEIN
A
245Aequorea victoriaMutation(s): 10 
Gene Names: GFP
Find proteins for P42212 (Aequorea victoria)
Go to UniProtKB:  P42212
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CRF
Query on CRF
A
L-PEPTIDE LINKINGC17 H18 N4 O4THR, TRP, GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.59 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.142 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 51.146α = 90.00
b = 62.140β = 90.00
c = 69.781γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
XDSdata reduction
REFMACrefinement
REFMACphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-03-21
    Type: Initial release
  • Version 1.1: 2012-04-04
    Type: Other
  • Version 1.2: 2017-12-20
    Type: Database references