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 1.3 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: 10.1002/prot.24259
  • Primary Citation of Related Structures:  2LY5

  • 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 loc ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Defensin-like protein
A
53Pentadiplandra brazzeanaN/A
Find proteins for P56552 (Pentadiplandra brazzeana)
Go to UniProtKB:  P56552
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2LY6 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-17
    Type: Initial release
  • Version 1.1: 2013-01-30
    Type: Database references
  • Version 1.2: 2013-02-06
    Type: Database references
  • Version 1.3: 2013-06-05
    Type: Database references