3E3S

Structure of thaumatin with the magic triangle I3C


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.73 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.158 

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This is version 1.3 of the entry. See complete history


Literature

A magic triangle for experimental phasing of macromolecules

Beck, T.Krasauskas, A.Gruene, T.Sheldrick, G.M.

(2008) Acta Crystallogr D Biol Crystallogr 64: 1179-1182

  • DOI: 10.1107/S0907444908030266
  • Primary Citation of Related Structures:  
    3E3S, 3E3T, 3E3D

  • PubMed Abstract: 
  • Obtaining phase information for the solution of macromolecular structures is still one of the bottlenecks in X-ray crystallography. 5-Amino-2,4,6-triiodoisophthalic acid (I3C), in which three covalently bound iodines form an equilateral triangle, was inc ...

    Obtaining phase information for the solution of macromolecular structures is still one of the bottlenecks in X-ray crystallography. 5-Amino-2,4,6-triiodoisophthalic acid (I3C), in which three covalently bound iodines form an equilateral triangle, was incorporated into proteins in order to obtain phases by single-wavelength anomalous dispersion (SAD). An improved binding capability compared with simple heavy-metal ions, ready availability, improved recognition of potential heavy-atom sites and low toxicity make I3C particularly suitable for experimental phasing.


    Organizational Affiliation

    Department of Structural Chemistry, Georg-August-Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany. tbeck@shelx.uni-ac.gwdg.de



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Thaumatin I A207Thaumatococcus danielliiMutation(s): 0 
Find proteins for P02883 (Thaumatococcus daniellii)
Explore P02883 
Go to UniProtKB:  P02883
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.73 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.158 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.707α = 90
b = 57.707β = 90
c = 149.582γ = 90
Software Package:
Software NamePurpose
SHELXrefinement
PDB_EXTRACTdata extraction
MAR345data collection
XDSdata reduction
SADABSdata scaling
SHELXDphasing
SHELXL-97refinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-10-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2012-04-11
    Changes: Database references
  • Version 1.3: 2017-10-25
    Changes: Refinement description