Serum modulates the aggregation - toxicity landscape of the staphylococcal toxin PSMα3
This study demonstrates that serum lipoproteins inhibit the formation of cytotoxic soluble oligomers of the Staphylococcus aureus toxin PSMα3, revealing that these early aggregation intermediates, rather than mature fibrils, drive cell death and highlighting the critical role of the cellular environment in modulating bacterial virulence.