8CRB image
Entry Detail
PDB ID:
8CRB
EMDB ID:
Title:
Cryo-EM structure of PcrV/Fab(11-E5)
Biological Source:
Host Organism:
PDB Version:
Deposition Date:
2023-03-08
Release Date:
2023-11-22
Method Details:
Experimental Method:
Resolution:
4.60 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Heavy chain
Chain IDs:A
Chain Length:227
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Light chain
Chain IDs:B
Chain Length:216
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Maltose/maltodextrin-binding periplasmic protein,Type III secretion protein PcrV
Chain IDs:C
Chain Length:692
Number of Molecules:1
Biological Source:Pseudomonas aeruginosa
Ligand Molecules
Primary Citation

Abstact

Drug-resistant Pseudomonas aeruginosa (PA) poses an emerging threat to human health with urgent need for alternative therapeutic approaches. Here, we deciphered the B cell and antibody response to the virulence-associated type III secretion system (T3SS) in a cohort of patients chronically infected with PA. Single-cell analytics revealed a diverse B cell receptor repertoire directed against the T3SS needle-tip protein PcrV, enabling the production of monoclonal antibodies (mAbs) abrogating T3SS-mediated cytotoxicity. Mechanistic studies involving cryoelectron microscopy identified a surface-exposed C-terminal PcrV epitope as the target of highly neutralizing mAbs with broad activity against drug-resistant PA isolates. These anti-PcrV mAbs were as effective as treatment with conventional antibiotics in vivo. Our study reveals that chronically infected patients represent a source of neutralizing antibodies, which can be exploited as therapeutics against PA.

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Primary Citation of related structures