4HE7

Crystal Structure of Brazzein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.218 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The structure of brazzein, a sweet-tasting protein from the wild African plant Pentadiplandra brazzeana

Nagata, K.Hongo, N.Kameda, Y.Yamamura, A.Sasaki, H.Lee, W.C.Ishikawa, K.Suzuki, E.Tanokura, M.

(2013) Acta Crystallogr.,Sect.D 69: 642-647

  • DOI: 10.1107/S0907444913001005

  • PubMed Abstract: 
  • Brazzein is the smallest sweet-tasting protein and was isolated from the wild African plant Pentadiplandra brazzeana. The brazzein molecule consists of 54 amino-acid residues and four disulfide bonds. Here, the first crystal structure of brazzein is ...

    Brazzein is the smallest sweet-tasting protein and was isolated from the wild African plant Pentadiplandra brazzeana. The brazzein molecule consists of 54 amino-acid residues and four disulfide bonds. Here, the first crystal structure of brazzein is reported at 1.8 Å resolution and is compared with previously reported solution structures. Despite the overall structural similarity, there are several remarkable differences between the crystal and solution structures both in their backbone folds and side-chain conformations. Firstly, there is an additional α-helix in the crystal structure. Secondly, the atomic r.m.s.d.s between the corresponding C(α)-atom pairs are as large as 2.0-2.2 Å between the crystal and solution structures. Thirdly, the crystal structure exhibits a molecular shape that is similar but not identical to the solution structures. The crystal structure of brazzein reported here will provide additional information and further insights into the intermolecular interaction of brazzein with the sweet-taste receptor.


    Organizational Affiliation

    Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Defensin-like protein
A
54Pentadiplandra brazzeanaN/A
Find proteins for P56552 (Pentadiplandra brazzeana)
Go to UniProtKB:  P56552
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
A
L-PEPTIDE LINKINGC5 H7 N O3GLU
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.218 
  • Space Group: I 41 2 2
Unit Cell:
Length (Å)Angle (°)
a = 61.400α = 90.00
b = 61.400β = 90.00
c = 59.600γ = 90.00
Software Package:
Software NamePurpose
WEISdata scaling
MOLREPphasing
HKL-2000data scaling
HKL-2000data reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-03-27
    Type: Initial release
  • Version 1.1: 2013-08-07
    Type: Database references
  • Version 1.2: 2017-11-15
    Type: Refinement description