2WHT image
Deposition Date 2009-05-06
Release Date 2009-08-11
Last Version Date 2024-11-13
Entry Detail
PDB ID:
2WHT
Keywords:
FLUORESCENT PROTEIN
Title:
Fluorescent Protein mKeima at pH 5.6
Biological Source:
Source Organism(s):
Montipora sp. 20 (Taxon ID: 321802)
Expression System(s):
Escherichia coli bl21(de3)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.90 Å
R-Value Free:
0.23
R-Value Work:
0.18
R-Value Observed:
0.18
Space Group:
C 1 2 1
2WHT validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:LARGE STOKES SHIFT FLUORESCENT PROTEIN
Gene (Uniprot):m-keima
Chain IDs:A, B, C, D
Chain Length:242
Number of Molecules:4
Biological Source:Montipora sp. 20
UniProt ID:Q1JV70 Pfam ID:PF01353
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
CRQ A GLN ?
Primary Citation
Reverse Ph-Dependence of Chromophore Protonation Explains the Large Stokes Shift of the Red Fluorescent Protein Mkeima.
J.Am.Chem.Soc. 131 10356 ? (2009)
PMID: 19722611 DOI: 10.1021/JA903695N

Abstact

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.

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Disease

Primary Citation of related structures
2WHU
2WHS
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