Summary
This transcriptomics study elucidates how Staphylococcus aureus regulates sulfur metabolism through the CymR transcriptional repressor in response to varying sulfur availability. The authors demonstrate that sulfur starvation and replete CymR regulons substantially overlap and reveal interconnections between sulfur, iron acquisition, and oxidative stress metabolism. The work identifies thiosulfate as inducing the largest transcriptional response and confirms specific transporters and hypothetical proteins essential for growth on thiosulfate as the sole sulfur source.
Regional applicability
This is a fundamental microbiology study of bacterial pathogen physiology with no direct application to United Kingdom farming systems or soil health. The findings may inform understanding of S. aureus pathogenesis in clinical settings but do not address agricultural soils, crop nutrition, or farming practice.
Key measures
Differential gene expression (transcriptomics); CymR regulon composition; growth rates on different sulfur sources; thiosulfate transporter function
Outcomes reported
The study characterised CymR-dependent and -independent sulfur-starvation responses in S. aureus under chemically defined conditions, quantifying transcriptional responses to different sulfur sources (cysteine, cystine, glutathione, thiosulfate) and identifying essential genes for thiosulfate utilisation.
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