4P1Q

GREEN FLUORESCENT PROTEIN E222H VARIANT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.172 
  • R-Value Work: 0.136 
  • R-Value Observed: 0.138 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Replacement of Highly Conserved E222 by the Photostable Non-photoconvertible Histidine in GFP.

Auerbach, D.Klein, M.Franz, S.Carius, Y.Lancaster, C.R.Jung, G.

(2014) Chembiochem 15: 1404-1408

  • DOI: 10.1002/cbic.201402075
  • Primary Citation of Related Structures:  
    4P1Q

  • PubMed Abstract: 
  • The widely used green fluorescent protein (GFP) decarboxylates upon irradiation; this involves removal of the acidic function of the glutamic acid at position 222, thereby resulting in the irreversible photoconversion of GFP. To suppress this phenome ...

    The widely used green fluorescent protein (GFP) decarboxylates upon irradiation; this involves removal of the acidic function of the glutamic acid at position 222, thereby resulting in the irreversible photoconversion of GFP. To suppress this phenomenon, the photostable, non-photoconvertible histidine was introduced at position 222 in GFP. The variant E222H shows negligible photodynamic processes and high expression yield. In addition, the stable and bright fluorescence over a wide pH range makes the E222H protein an alternative for GFP in fluorescence imaging and spectroscopy. Other fluorescent proteins are predicted to benefit from replacement of the catalytic glutamic acid by histidine.


    Organizational Affiliation

    Department of Biophysical Chemistry, Saarland University, Campus B22, 66123 Saarbrücken (Germany).



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Green fluorescent proteinA228Aequorea victoriaMutation(s): 3 
Gene Names: GFP
Find proteins for P42212 (Aequorea victoria)
Explore P42212 
Go to UniProtKB:  P42212
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
GYS
Query on GYS
AL-PEPTIDE LINKINGC14 H15 N3 O5SER, TYR, GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.172 
  • R-Value Work: 0.136 
  • R-Value Observed: 0.138 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.6α = 90
b = 62.2β = 90
c = 67.57γ = 90
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-16
    Type: Initial release
  • Version 1.1: 2015-01-21
    Changes: Structure summary