Work

Cross-α/β polymorphism of PSMα3 fibrils

Year: 2022

Type: article

Abstract: Significance Phenol soluble modulins (PSMs) are an important class of peptides secreted by Staphylococcus aureus bacteria. The toxicity to human cells and unique ability of one such peptide, PSMα3, to aggregate into an α-helical amyloid-like structure may hold a key to a better understanding of the virulence of dangerous pathogens such as methicillin resistant S. aureus . In reporting a detailed two-dimensional infrared (2DIR) analysis of PSMα3, we found direct evidence of multiple aggregate architectures existing in equilibrium with one another. We also discovered a unique and characteristic 2DIR spectroscopic signature that unambiguously reports on the presence of the unusual and highly cytotoxic cross-α amyloid structure.

Source: Proceedings of the National Academy of Sciences

DOI: 10.1073/pnas.2114923119

Authors: Olivia M. Cracchiolo, Dean N. Edun, Vincent M. Betti, Jacob M. Goldberg, Arnaldo L. Serrano

Institutions: University of Notre Dame, Colgate University

Language: English

Topic: Antimicrobial Peptides and Activities

Subfield: Microbiology

Field: Immunology and Microbiology

Domain: Life Sciences

SDG: Good health and well-being

Open Access status: hybrid

Funder: University of Notre Dame