1QFA

STRUCTURE OF A NEUROPEPTIDE Y Y2 AGONIST


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 1000 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST STEREOCHEMICAL AND NOE ENERGIES 

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This is version 1.3 of the entry. See complete history


Literature

Helical structure and self-association in a 13 residue neuropeptide Y Y2 receptor agonist: relationship to biological activity.

Barnham, K.J.Catalfamo, F.Pallaghy, P.K.Howlett, G.J.Norton, R.S.

(1999) Biochim Biophys Acta 1435: 127-137

  • DOI: 10.1016/s0167-4838(99)00214-9
  • Primary Citation of Related Structures:  
    1QFA

  • PubMed Abstract: 
  • The solution structure and self-association behaviour of a 13 residue peptide analogue of the C-terminal region of human neuropeptide Y (NPY) have been investigated. NMR analysis of Ac[Leu(28,31)]NPY(24-36), a potent Y2 receptor agonist, shows that it is unstructured in aqueous solution at 5-20 degrees C, but forms a well-defined helix (encompassing residues 25-35) in 40% trifluoroethanol/water at 20 degrees C ...

    The solution structure and self-association behaviour of a 13 residue peptide analogue of the C-terminal region of human neuropeptide Y (NPY) have been investigated. NMR analysis of Ac[Leu(28,31)]NPY(24-36), a potent Y2 receptor agonist, shows that it is unstructured in aqueous solution at 5-20 degrees C, but forms a well-defined helix (encompassing residues 25-35) in 40% trifluoroethanol/water at 20 degrees C. Sedimentation experiments show that, in contrast to many peptides in aqueous trifluoroethanol, Ac[Leu(28,31)]NPY(24-36) associates to form a trimer or, more likely, a tetramer in 40% trifluoroethanol, even though it is monomeric in water. This is consistent with the observation of inter-molecular nuclear Overhauser enhancements in trifluoroethanol. Possible models of the associated form that are consistent with the NMR data are described. The relevance of the helical structure observed in trifluoroethanol to the structure of this peptide bound to the NPY Y2 receptor is discussed.


    Organizational Affiliation

    Biomolecular Research Institute, 343 Royal Parade, Parkville, Vic., Australia.



Macromolecules
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (NEUROPEPTIDE Y)A15N/AMutation(s): 2 
UniProt & NIH Common Fund Data Resources
Find proteins for P01303 (Homo sapiens)
Explore P01303 
Go to UniProtKB:  P01303
PHAROS:  P01303
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 1000 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST STEREOCHEMICAL AND NOE ENERGIES 
  • OLDERADO: 1QFA Olderado

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-04-08
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-03-14
    Changes: Database references, Derived calculations