3GL4

X-ray structure of photobleached killerred


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.310 
  • R-Value Work: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis for phototoxicity of the genetically encoded photosensitizer KillerRed.

Pletnev, S.Gurskaya, N.G.Pletneva, N.V.Lukyanov, K.A.Chudakov, D.M.Martynov, V.I.Popov, V.O.Kovalchuk, M.V.Wlodawer, A.Dauter, Z.Pletnev, V.

(2009) J.Biol.Chem. 284: 32028-32039

  • DOI: 10.1074/jbc.M109.054973
  • Primary Citation of Related Structures:  
  • Also Cited By: 4ZBL

  • PubMed Abstract: 
  • KillerRed is the only known fluorescent protein that demonstrates notable phototoxicity, exceeding that of the other green and red fluorescent proteins by at least 1,000-fold. KillerRed could serve as an instrument to inactivate target proteins or to ...

    KillerRed is the only known fluorescent protein that demonstrates notable phototoxicity, exceeding that of the other green and red fluorescent proteins by at least 1,000-fold. KillerRed could serve as an instrument to inactivate target proteins or to kill cell populations in photodynamic therapy. However, the nature of KillerRed phototoxicity has remained unclear, impeding the development of more phototoxic variants. Here we present the results of a high resolution crystallographic study of KillerRed in the active fluorescent and in the photobleached non-fluorescent states. A unique and striking feature of the structure is a water-filled channel reaching the chromophore area from the end cap of the beta-barrel that is probably one of the key structural features responsible for phototoxicity. A study of the structure-function relationship of KillerRed, supported by structure-based, site-directed mutagenesis, has also revealed the key residues most likely responsible for the phototoxic effect. In particular, Glu(68) and Ser(119), located adjacent to the chromophore, have been assigned as the primary trigger of the reaction chain.


    Organizational Affiliation

    Synchrotron Radiation Research Section, Macromolecular Crystallography Laboratory, National Cancer Institute/SAIC-Frederick Inc., Frederick, Maryland 21702, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
KillerRed
A, B
237Anthomedusae sp. DC-2005Mutation(s): 0 
Find proteins for Q2TCH5 (Anthomedusae sp. DC-2005)
Go to UniProtKB:  Q2TCH5
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CRQ
Query on CRQ
A, B
L-PEPTIDE LINKINGC16 H16 N4 O5GLN, TYR, GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.310 
  • R-Value Work: 0.229 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 72.218α = 90.00
b = 73.781β = 90.00
c = 76.178γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
MOLREPphasing
HKL-2000data scaling
SERGUIdata collection
HKL-2000data reduction
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-09-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance