3PJ7

Crystal structure of far-red fluorescent protein Katushka crystallized at pH 8.5


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystallographic study of red fluorescent protein eqFP578 and its far-red variant Katushka reveals opposite pH-induced isomerization of chromophore.

Pletneva, N.V.Pletnev, V.Z.Shemiakina, I.I.Chudakov, D.M.Artemyev, I.Wlodawer, A.Dauter, Z.Pletnev, S.

(2011) Protein Sci. 20: 1265-1274

  • DOI: 10.1002/pro.654
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The wild type red fluorescent protein eqFP578 (from sea anemone Entacmaea quadricolor, λ(ex) = 552 nm, λ(em) = 578 nm) and its bright far-red fluorescent variant Katushka (λ(ex) = 588 nm, λ(em) = 635 nm) are characterized by the pronounced pH depende ...

    The wild type red fluorescent protein eqFP578 (from sea anemone Entacmaea quadricolor, λ(ex) = 552 nm, λ(em) = 578 nm) and its bright far-red fluorescent variant Katushka (λ(ex) = 588 nm, λ(em) = 635 nm) are characterized by the pronounced pH dependence of their fluorescence. The crystal structures of eqFP578f (eqFP578 with two point mutations improving the protein folding) and Katushka have been determined at the resolution ranging from 1.15 to 1.85 Å at two pH values, corresponding to low and high level of fluorescence. The observed extinguishing of fluorescence upon reducing pH in eqFP578f and Katushka has been shown to be accompanied by the opposite trans-cis and cis-trans chromophore isomerization, respectively. Asn143, Ser158, His197 and Ser143, Leu174, and Arg197 have been shown to stabilize the respective trans and cis fluorescent states of the chromophores in eqFP578f and Katushka at higher pH. The cis state has been suggested as being primarily responsible for the observed far-red shift of the emission maximum of Katushka relative to that of eqFP578f.


    Organizational Affiliation

    Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Science, Moscow 117997, Miklukho-Maklaya 16/10, Russia. pletnevs@mail.nih.gov




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Red fluorescent protein eqFP578
A, B, C, D
231Entacmaea quadricolorMutation(s): 0 
Find proteins for H3JQU6 (Entacmaea quadricolor)
Go to UniProtKB:  H3JQU6
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
NRQ
Query on NRQ
A, B, C, D
L-PEPTIDE LINKINGC16 H17 N3 O4 SMET,TYR,GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.196 
  • Space Group: I 41
Unit Cell:
Length (Å)Angle (°)
a = 161.353α = 90.00
b = 161.353β = 90.00
c = 74.486γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing
SCALEPACKdata scaling
SERGUIdata collection
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-05-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2012-02-22
    Type: Other