2WIS image
Deposition Date 2009-05-15
Release Date 2009-08-11
Last Version Date 2024-11-06
Entry Detail
PDB ID:
2WIS
Keywords:
FLUORESCENT PROTEIN
Title:
Fluorescent protein KillerRed in the bleached state
Biological Source:
Source Organism:
Anthomedusae sp. DC-2005 (Taxon ID: 328397)
Host Organism:
Escherichia coli BL21(DE3)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.35 Å
R-Value Free:
0.30
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
P 21 21 21
2WIS validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:KILLERRED
Chain IDs:A, B
Chain Length:259
Number of Molecules:2
Biological Source:Anthomedusae sp. DC-2005
UniProt ID:Q2TCH5 Pfam ID:PF01353
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
CRQ A GLN ?
Ligand Molecules
NA
Primary Citation
Structural Basis for the Phototoxicity of the Fluorescent Protein Killerred.
FEBS Lett. 583 2839 ? (2009)
PMID: 19646983 DOI: 10.1016/J.FEBSLET.2009.07.041

Abstact

The red fluorescent protein KillerRed, engineered from the hydrozoan chromoprotein anm2CP, has been reported to induce strong cytotoxicity through the chromophore assisted light inactivation (CALI) effect. Here, we present the X-ray structures of KillerRed in its native and bleached states. A long water-filled channel is revealed, connecting the methylene bridge of the chromophore to the solvent. This channel facilitates the transit of oxygen and of reactive oxygen species (ROS) formed by reaction with the excited chromophore. The functional roles of key mutations used to produce KillerRed are discussed, strong chromophore distortions in the bleached state are revealed, and mechanisms for ROS production and self protection are proposed. The presence of a partially mature, photo-resistant, green-emitting state is characterized, which accounts for enhanced CALI by "pre-bleached" KillerRed.

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Disease

Primary Citation of related structures
2WIQ