32MP | pdb_000032mp

Solution structure of a chimeric peptide derived from trpzip2 and the disulfide loop of the PilA protein from P. aeruginosa

• PDB DOI: https://doi.org/10.2210/pdb32MP/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Pseudomonas aeruginosa
• Mutation(s): No 


• Deposited: 2026-07-16 Released: 2026-08-19 
• Deposition Author(s): Sette, M.
• Funding Organization(s): Other private

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: target function 

Literature

Structured peptides as vaccine antigens against infections.

Trappetti, C., van Ingen, H., Falconi, M., Romeo, A., Sancamillo, G., Caprini, M., Oggioni, M.R., Sette, M.

(2026) Front Immunol 17: 1908831-1908831

• PubMed: 42630162 
• DOI: https://doi.org/10.3389/fimmu.2026.1908831
• Primary Citation Related Structures: 
  32MP


• PubMed Abstract: 
  

  The onset of a new infection by a pathogen requires a rapid and prompt response from the body. Here, we present a simple and effective strategy to stimulate antibody production by grafting immunogenic peptides onto a beta-strand peptide scaffold. Analysis of the method using a known immunogenic region, the disulfide loop of the PilA protein of the Pseudomonas aeruginosa pilus, shows that the molecule folds properly in solution and, upon vaccination of mice, provides significant protection against intravenous challenge with the P. aeruginosa PAK strain.

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Organizational Affiliation: 
• Department of Pharmacy and Biotechnology FABIT, University of Bologna, Bologna, Italy.
NMR Spectroscopy, Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands.
Department of Biology, University of Rome "Tor Vergata", Rome, Italy.
Bioinformatics Research Unit in Infectious Diseases, National Institute for Infectious Diseases "Lazzaro Spallanzani" - IRCCS, Rome, Italy.
European School of Molecular Medicine (SEMM), Milan, Italy.
Italian Institute for Genomic Medicine, c/o IRCSS Candiolo, Torino, Italy.
IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy.
IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy.
INFN, University of Rome "Tor Vergata", Rome, Italy.
CSPBAT Laboratory, Sorbonne Paris Cité, University of Paris 13, UMR 7244, CNRS, Bobigny, France.
Department of Chemical Sciences and Technology, University of Rome "Tor Vergata", Rome, Italy.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by (software)

Biological Assembly Evidence: NMR Distance Restraints

Macromolecule Content 

• Total Structure Weight: 3.16 kDa 
• Atom Count: 222 
• Modeled Residue Count: 26 
• Deposited Residue Count: 26 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Fimbrial protein	A	26	Pseudomonas aeruginosa	Mutation(s): 0
UniProt
Find proteins for P02973 (Pseudomonas aeruginosa) Explore P02973  Go to UniProtKB:  P02973

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: target function 

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-08-19 
Deposition Author(s): Sette, M.

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Funding Organization	Location	Grant Number
Other private	Italy	FFC 13/2023

Revision History  

• Version 1.0: 2026-08-19
  Type: Initial release
  
• Version 1.1: 2026-09-02
  Changes: Database references