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 

wwPDB Validation 3D Report Full Report


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


  • 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 i ...

    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 LengthOrganismDetails
PROTEIN (NEUROPEPTIDE Y)
A
15Homo sapiensMutation(s): 2 
Gene Names: NPY
Find proteins for P01303 (Homo sapiens)
Go to Gene View: NPY
Go to UniProtKB:  P01303
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A
NON-POLYMERH2 N

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ACE
Query on ACE
A
NON-POLYMERC2 H4 O

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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 or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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