2C9I

Structure of the fluorescent protein asFP499 from Anemonia sulcata


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.245 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Chromophore-Protein Interactions in the Anthozoan Green Fluorescent Protein Asfp499

Nienhaus, K.Renzi, F.Vallone, B.Wiedenmann, J.Nienhaus, G.U.

(2006) Biophys.J. 91: 4210

  • DOI: 10.1529/biophysj.106.087411

  • PubMed Abstract: 
  • Despite their similar fold topologies, anthozoan fluorescent proteins (FPs) can exhibit widely different optical properties, arising either from chemical modification of the chromophore itself or from specific interactions of the chromophore with the ...

    Despite their similar fold topologies, anthozoan fluorescent proteins (FPs) can exhibit widely different optical properties, arising either from chemical modification of the chromophore itself or from specific interactions of the chromophore with the surrounding protein moiety. Here we present a structural and spectroscopic investigation of the green FP asFP499 from the sea anemone Anemonia sulcata var. rufescens to explore the effects of the protein environment on the chromophore. The optical absorption and fluorescence spectra reveal two discrete species populated in significant proportions over a wide pH range. Moreover, multiple protonation reactions are evident from the observed pH-dependent spectral changes. The x-ray structure of asFP499, determined by molecular replacement at a resolution of 1.85 A, shows the typical beta-barrel fold of the green FP from Aequorea victoria (avGFP). In its center, the chromophore, formed from the tripeptide Gln(63)-Tyr(64)-Gly(65), is tightly held by multiple hydrogen bonds in a polar cage that is structurally quite dissimilar to that of avGFP. The x-ray structure provides interesting clues as to how the spectroscopic properties are fine tuned by the chromophore environment.


    Organizational Affiliation

    Department of Biophysics, University of Ulm, 89069 Ulm, Germany. uli@uiuc.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GREEN FLUORESCENT PROTEIN ASFP499
A, B, C, D, E, F, G, H
228Anemonia sulcataMutation(s): 0 
Find proteins for Q9GPI6 (Anemonia sulcata)
Go to UniProtKB:  Q9GPI6
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CRQ
Query on CRQ
A, B, C, D, E, F, G, H
L-PEPTIDE LINKINGC16 H16 N4 O5GLN, TYR, GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.245 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 71.880α = 90.00
b = 135.126β = 106.93
c = 95.071γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-01-16
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance