1D1F

SOLUTION STRUCTURE OF LACTAM-BRIDGED C-TERMINAL ANALOGUE-III OF NEUROPEPTIDE Y


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • 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

Stabilization of the helical structure of Y2-selective analogues of neuropeptide Y by lactam bridges.

Yao, S.Smith-White, M.A.Potter, E.K.Norton, R.S.

(2002) J.Med.Chem. 45: 2310-2318

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The importance of helical structure in an analogue of NPY selective for the Y2 receptor, Ac[Leu28,31]NPY24-36, has been investigated by introducing a lactam bridge between positions 28 and 32. The resulting analogue, Ac-cyclo28/32[Ala24,Lys28,Leu31,G ...

    The importance of helical structure in an analogue of NPY selective for the Y2 receptor, Ac[Leu28,31]NPY24-36, has been investigated by introducing a lactam bridge between positions 28 and 32. The resulting analogue, Ac-cyclo28/32[Ala24,Lys28,Leu31,Glu32]NPY24-36, is a potent Y2-selective agonist. Structural analysis by NMR shows that this analogue forms a helical structure in a 40% trifluoroethanol/water mixture, whereas in water only the region around the lactam bridge (Lys28-Glu32) adopts helical-like structure, with both N- and C-termini being poorly defined. The observation of well-defined helical structure in aqueous TFE contrasts with that reported for a similar analogue, Ac-cyclo28/32[Lys28,Glu32]NPY25-36 (Rist et al. FEBS Lett. 1996, 394, 169-173), which consisted of a hairpin-like structure that brought the N- and C-termini into proximity. We have therefore determined the structures of this analogue, as well as those of Ac-cyclo28/32[Ala24,Lys28,Leu31,Glu32]NPY24-36 and Ac-cyclo28/32[Ala24,Lys28,Glu32]NPY24-36, under identical solution conditions (30% TFE/H2O mixture at 308 K) and find essentially the same helical structure in all three peptides. These findings support the proposal that these Y2-selective analogues adopt a helical structure when bound to the Y2 receptor.


    Related Citations: 
    • 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.
      () TO BE PUBLISHED --: --
    • Solution structure of human neuropeptide Y
      Monks, S.A.,Karagianis, G.,Howlett, G.J.,Norton, R.S.
      (1996) J.Biomol.NMR 8: 379


    Organizational Affiliation

    Biomolecular Research Institute, 343 Royal Parade, Parkville, Victoria 3052, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
C-TERMINAL ANALOGUE OF NEUROPEPTIDE Y, A POTENT Y2 RECEPTOR AGONIST
A
15N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A
NON-POLYMERH2 N

--

ACE
Query on ACE
A
NON-POLYMERC2 H4 O

--

Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 1D1F Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1999-09-15 
  • Released Date: 2000-06-16 
  • Deposition Author(s): Yao, S., Norton, R.S.

Revision History 

  • Version 1.0: 2000-06-16
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-01-24
    Type: Database references, Derived calculations, Experimental preparation