Download MendeleyThe PP-Fold Solution Structure of Human Polypeptide YY and Human PYY3-36 As Determined by NMR(,)
Nygaard, R., Nielbo, S., Schwartz, T.W., Poulsen, F.M.(2006) Biochemistry 45: 8350-8357
- PubMed: 16819834
- DOI: https://doi.org/10.1021/bi060359l
- Primary Citation of Related Structures:
2DEZ, 2DF0 - PubMed Abstract:
PYY3-36 is a biopharmaceutical antiobesity agent under development as well as an endogenous satiety hormone, which is generated by dipeptidyl peptidase-IV digestion of polypetide YY (PYY), and in contrast to the parent hormone, PYY is highly selective for the Y2 versus the Y1 receptor. NMR analysis revealed a highly ordered, back-folded structure for human PYY in aqueous solution similar to the classical PP-fold structure of pancreatic polypeptide. The NMR analysis of PYY3-36 also showed a folded structure resembling a PP-fold, which however was characterized by far fewer long distance NOEs than the PP-fold observed in the full-length peptide. This suggests that either a conformational change has occurred in the N-terminal segment of PYY3-36 or that this segments is characterized by larger dynamics. The study supports the notion that the PP-fold is crucial for establishing simultaneous interactions with two subsites in the receptor for binding of, respectively, the N- and C-terminal ends of PYY. The Y2 receptor only requires recognition of the C-terminal segment of the molecule as displayed by the Y2 selective PYY3-36.
Organizational Affiliation:
Structural Biology and NMR Laboratory, Institute of Molecular Biology and Physiology, University of Copenhagen, Øster Farimagsgade 2A, DK-1353 Copenhagen K, Denmark.
