2LY6

Refined solution structure of recombinant brazzein at low temperature


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Temperature-dependent conformational change affecting Tyr11 and sweetness loops of brazzein.

Cornilescu, C.C.Cornilescu, G.Rao, H.Porter, S.F.Tonelli, M.Derider, M.L.Markley, J.L.Assadi-Porter, F.M.

(2013) Proteins 81: 919-925

  • DOI: https://doi.org/10.1002/prot.24259
  • Primary Citation of Related Structures:  
    2LY5, 2LY6

  • PubMed Abstract: 

    The sweet protein brazzein, a member of the Csβα fold family, contains four disulfide bonds that lend a high degree of thermal and pH stability to its structure. Nevertheless, a variable temperature study has revealed that the protein undergoes a local, reversible conformational change between 37 and 3°C with a midpoint about 27°C that changes the orientations and side-chain hydrogen bond partners of Tyr8 and Tyr11. To test the functional significance of this effect, we used NMR saturation transfer to investigate the interaction between brazzein and the amino terminal domain of the sweet receptor subunit T1R2; the results showed a stronger interaction at 7°C than at 37°C. Thus the low temperature conformation, which alters the orientations of two loops known to be critical for the sweetness of brazzein, may represent the bound state of brazzein in the complex with the human sweet receptor.


  • Organizational Affiliation

    National Magnetic Resonance Facility at Madison, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Defensin-like protein53Pentadiplandra brazzeanaMutation(s): 0 
UniProt
Find proteins for P56552 (Pentadiplandra brazzeana)
Explore P56552 
Go to UniProtKB:  P56552
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP56552
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-10-17
    Type: Initial release
  • Version 1.1: 2013-01-30
    Changes: Database references
  • Version 1.2: 2013-02-06
    Changes: Database references
  • Version 1.3: 2013-06-05
    Changes: Database references
  • Version 1.4: 2023-06-14
    Changes: Data collection, Database references, Derived calculations, Other