2WHS

Fluorescent Protein mKeima at pH 3.8


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Reverse Ph-Dependence of Chromophore Protonation Explains the Large Stokes Shift of the Red Fluorescent Protein Mkeima.

Violot, S.Carpentier, P.Blanchoin, L.Bourgeois, D.

(2009) J.Am.Chem.Soc. 131: 10356

  • DOI: 10.1021/ja903695n
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The recently developed red fluorescent protein Keima exhibits the largest Stokes shift (180 nm) observed to date. Combining X-ray crystallography with (in crystallo) UV-visible absorption, fluorescence, and Raman spectroscopy, we have investigated mo ...

    The recently developed red fluorescent protein Keima exhibits the largest Stokes shift (180 nm) observed to date. Combining X-ray crystallography with (in crystallo) UV-visible absorption, fluorescence, and Raman spectroscopy, we have investigated molecular determinants of this peculiar property. The results demonstrate a pH-dependent "reverse chromophore protonation" triggered by the key residue Asp157 and which couples to cis/trans isomerization of the chromophore. These data provided guidelines to rationally design a useful Keima variant.


    Organizational Affiliation

    Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Physiologie Cellulaire Végétale, CEA, CNRS, INRA, Université Joseph Fourier, 17 rue des Martyrs, F-38054 Grenoble, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LARGE STOKES SHIFT FLUORESCENT PROTEIN
A, B, C, D
242Montipora sp. 20Mutation(s): 0 
Gene Names: m-keima
Find proteins for Q1JV70 (Montipora sp. 20)
Go to UniProtKB:  Q1JV70
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CRQ
Query on CRQ
A, B, C, D
L-PEPTIDE LINKINGC16 H16 N4 O5GLN, TYR, GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.190 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 92.570α = 90.00
b = 98.100β = 90.00
c = 123.270γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
PHASERphasing
XDSdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-08-11
    Type: Initial release
  • Version 1.1: 2012-07-04
    Type: Database references, Derived calculations, Non-polymer description, Other, Refinement description, Version format compliance
  • Version 1.2: 2018-03-07
    Type: Source and taxonomy
  • Version 1.3: 2019-03-06
    Type: Data collection, Derived calculations, Experimental preparation
  • Version 1.4: 2019-10-23
    Type: Data collection, Database references, Other