3AOK

Crystal structure of sweet-tasting protein thaumatin II


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.27 Å
  • R-Value Free: 0.148 

wwPDB Validation 3D Report Full Report


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Literature

Crystal structure of the sweet-tasting protein thaumatin II at 1.27A

Masuda, T.Ohta, K.Tani, F.Mikami, B.Kitabatake, N.

(2011) Biochem.Biophys.Res.Commun. 410: 457-460

  • DOI: 10.1016/j.bbrc.2011.05.158

  • PubMed Abstract: 
  • Thaumatin, an intensely sweet-tasting protein, elicits a sweet taste sensation at 50 nM. Here the X-ray crystallographic structure of one of its variants, thaumatin II, was determined at a resolution of 1.27 Å. Overall structure of thaumatin II is si ...

    Thaumatin, an intensely sweet-tasting protein, elicits a sweet taste sensation at 50 nM. Here the X-ray crystallographic structure of one of its variants, thaumatin II, was determined at a resolution of 1.27 Å. Overall structure of thaumatin II is similar to thaumatin I, but a slight shift of the Cα atom of G96 in thaumatin II was observed. Furthermore, the side chain of residue 67 in thaumatin II is highly disordered. Since residue 67 is one of two residues critical to the sweetness of thaumatin, the present results suggested that the critical positive charges at positions 67 and 82 are disordered and the flexibility and fluctuation of these side chains would be suitable for interaction of thaumatin molecules with sweet receptors.


    Organizational Affiliation

    Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Uji, Kyoto 611-0011, Japan. t2masuda@kais.kyoto-u.ac.jp




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Thaumatin-2
A
207Thaumatococcus danielliiN/A
Find proteins for P02884 (Thaumatococcus daniellii)
Go to UniProtKB:  P02884
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
TLA
Query on TLA

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Download CCD File 
A
L(+)-TARTARIC ACID
C4 H6 O6
FEWJPZIEWOKRBE-JCYAYHJZSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.27 Å
  • R-Value Free: 0.148 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 57.769α = 90.00
b = 57.769β = 90.00
c = 150.126γ = 90.00
Software Package:
Software NamePurpose
SHELXL-97refinement
HKL-2000data reduction
HKL-2000data scaling
SHELXmodel building
SHELXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-07-27
    Type: Initial release