1QBF

NMR SOLUTION STRUCTURE OF PORCINE PEPTIDE YY


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 
  • Selection Criteria: lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure of monomeric peptide YY supports the functional significance of the PP-fold.

Keire, D.A.Kobayashi, M.Solomon, T.E.Reeve, J.R.

(2000) Biochemistry 39: 9935-9942


  • PubMed Abstract: 
  • Peptide YY (PYY) belongs to a family of peptides including neuropeptide Y (NPY) and pancreatic peptide (PP) that regulate numerous functions through both central and peripheral receptors. The solution structure of these peptides is hypothesized to be ...

    Peptide YY (PYY) belongs to a family of peptides including neuropeptide Y (NPY) and pancreatic peptide (PP) that regulate numerous functions through both central and peripheral receptors. The solution structure of these peptides is hypothesized to be critically important in receptor selectivity and activation, based on prior demonstration of a stable tertiary conformation of PP called the "PP-fold". Circular dichroism (CD) spectra show a pH-dependent structural transition in the pH range 3-4. Thus we describe the tertiary structure of porcine PYY in water at pH 5.5, 25 degrees C, and 150 mM NaCl, as determined from 2D (1)H NMR data recorded at 500 MHz. A constraint set consisting of 396 interproton distances from NOE data was used as input for distance geometry, simulated annealing, and restrained energy minimization calculations in X-PLOR. The RMSDs of the 20 X-PLOR-generated structures were 0.71 +/- 0.14 and 1.16 +/- 0.17 A, respectively, for backbone and heavy atom overlays of residues 1-34. The resulting structure consists of two C-terminal helical segments from residues 17 to 22 and 25 to 33 separated by a kink at residues 23, 24, and 25, a turn centered around residues 12-14, and the N-terminus folded near residues 30 and 31. The well-defined portions of the PYY structure reported here bear a marked similarity to the structure of PP. Our findings strongly support the importance of the stable folded structure of this family of peptides for binding and activation of Y receptor subtypes.


    Organizational Affiliation

    CURE Digestive Diseases Research Center, Greater Los Angeles Veterans Healthcare System, Los Angeles, California 90073, USA. dkeire@ucla.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PEPTIDE YY
A
37Sus scrofaMutation(s): 0 
Gene Names: PYY
Find proteins for P68005 (Sus scrofa)
Go to Gene View: PYY
Go to UniProtKB:  P68005
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A
NON-POLYMERH2 N

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Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 
  • Selection Criteria: lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-08-16
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance