7RT9 image
Entry Detail
PDB ID:
7RT9
Title:
Crystal structures of human PYY and NPY
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2021-08-12
Release Date:
2022-03-02
Method Details:
Experimental Method:
Resolution:
1.90 Å
R-Value Free:
0.21
R-Value Work:
0.17
R-Value Observed:
0.18
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:4A3B2-A Fab heavy chain
Chain IDs:A, C
Chain Length:223
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:4A3B2-A Fab light chain
Chain IDs:B, D
Chain Length:214
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Peptide YY
Chain IDs:E (auth: Y), F (auth: Z)
Chain Length:37
Number of Molecules:2
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Crystal structures of human neuropeptide Y (NPY) and peptide YY (PYY).
Neuropeptides 92 102231 102231 (2022)
PMID: 35180645 DOI: 10.1016/j.npep.2022.102231

Abstact

Neuropeptide Y (NPY), peptide YY (PYY) and pancreatic polypeptide (PP) form the evolutionarily conserved pancreatic polypeptide family. While the fold is widely utilized in nature, crystal structures remain elusive, particularly for the human forms, with only the structure of a distant avian form of PP reported. Here we utilize a crystallization chaperone (antibody Fab fragment), specifically recognizing the amidated peptide termini, to solve the structures of human NPY and human PYY. Intriguingly, and despite limited sequence identity (~50%), the structure of human PYY closely resembles that of avian PP, highlighting the broad structural conservation of the fold throughout evolution. Specifically, the PYY structure is characterized by a C-terminal amidated α-helix, preceded by a backfolded poly-proline N-terminus, with the termini in close proximity to each other. In contrast, in the structure of human NPY the N-terminal component is disordered, while the helical component of the peptide is observed in a four-helix bundle type arrangement, consistent with a propensity for multimerization suggested by NMR studies.

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