1BRZ

SOLUTION STRUCTURE OF THE SWEET PROTEIN BRAZZEIN, NMR, 43 STRUCTURES

• PDB DOI: https://doi.org/10.2210/pdb1BRZ/pdb

• Classification: SWEET PROTEIN
• Organism(s): Pentadiplandra brazzeana
• Mutation(s): No 


• Deposited: 1998-03-12 Released: 1998-07-01 
• Deposition Author(s): Caldwell, J.E., Abildgaard, F., Dzakula, Z., Ming, D., Hellekant, G., Markley, J.L.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 80 
• Conformers Submitted: 43 
• Selection Criteria: LEAST RESTRAINT VIOLATION 

Literature

Solution structure of the thermostable sweet-tasting protein brazzein.

Caldwell, J.E., Abildgaard, F., Dzakula, Z., Ming, D., Hellekant, G., Markley, J.L.

(1998) Nat Struct Biol 5: 427-431

• PubMed: 9628478 
• DOI: https://doi.org/10.1038/nsb0698-427
• Primary Citation of Related Structures:  
  1BRZ, 2BRZ


• PubMed Abstract: 
  

  The fruit of Pentadiplandra brazzeana Baillon contains a small, sweet-tasting protein named brazzein. The structure of brazzein in solution was determined by proton nuclear magnetic resonance spectroscopy at pH 5.2 and 22 degrees C. The brazzein fold, which contains one alpha-helix and three strands of antiparallel beta-sheet, does not resemble that of either of the other two sweet-tasting proteins with known structures, monellin and thaumatin. Instead, the structure of brazzein resembles those of plant gamma-thionins and defensins and arthropod toxins. Sequence comparisons predict that members of a newly-identified family of serine proteinase inhibitors share the brazzein fold.

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Organizational Affiliation: 

Graduate Program in Biophysics, University of Wisconsin-Madison 53706, USA.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 6.49 kDa 
• Atom Count: 449 
• Modelled Residue Count: 54 
• Deposited Residue Count: 54 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
BRAZZEIN	A	54	Pentadiplandra brazzeana	Mutation(s): 0
UniProt
Find proteins for P56552 (Pentadiplandra brazzeana) Explore P56552  Go to UniProtKB:  P56552

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PCA	A	L-PEPTIDE LINKING	C5 H7 N O3		GLN

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 80 
• Conformers Submitted: 43 
• Selection Criteria: LEAST RESTRAINT VIOLATION 

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-07-01 
Deposition Author(s): Caldwell, J.E., Abildgaard, F., Dzakula, Z., Ming, D., Hellekant, G., Markley, J.L.

Revision History  

• Version 1.0: 1998-07-01
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 2.0: 2019-12-25
  Changes: Derived calculations, Other, Polymer sequence
• Version 2.1: 2024-11-06
  Changes: Data collection, Database references, Structure summary