Mild NaCl Stress Influences Staphylococcal Enterotoxin C Transcription in a Time-Dependent Manner and Reduces Protein Expression

Etter, Danai; Ukowitz, Christina; Eicher, Corinne; Tasara, Taurai; Johler, Sophia

doi:10.3389/fmicb.2022.820067

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Etter, D., Ukowitz, C., Eicher, C., Tasara, T., & Johler, S. (2022). Mild NaCl Stress Influences Staphylococcal Enterotoxin C Transcription in a Time-Dependent Manner and Reduces Protein Expression. Frontiers in Microbiology, 13, 820067. https://doi.org/10.3389/fmicb.2022.820067

Abstract

Enterotoxins (SEs) produced by Staphylococcus aureus are the cause of serious food intoxications. Staphylococcal enterotoxin C (SEC) is one of the main contributors, as it is often highly expressed. S. aureus possesses a competitive growth advantage over accompanying bacterial flora under stress conditions encountered in foods, such as high NaCl concentrations. However, the influence of NaCl as an external stressor on SEC expression is still unclear. We investigated the influence of 4.5% NaCl on sec mRNA and SEC protein levels. A qRT-