New data highlight on how bacterial stress responses reshape the relationship between mRNA and protein levels

Our latest data highlight, entitled “How bacterial stress responses reshape the relationship between mRNA and protein levels”, presents the work of Süer et al. (2026). The study investigates how bacterial pathogens regulate gene expression and protein production when exposed to stressful conditions encountered during infection, revealing important differences between messenger RNA (mRNA) and protein levels that could influence bacterial survival and adaptation.

Süer et al. (2026) integrated transcriptomics and proteomics data from three clinically relevant bacterial pathogens: Salmonella enterica Typhimurium, Yersinia pseudotuberculosis, and Staphylococcus aureus. The researchers examined bacterial responses to 10 infection-relevant stress conditions, including nutrient limitation, hypoxia, oxidative stress, acidic environments, and osmotic stress. By comparing mRNA abundance with protein levels, the study demonstrated that the relationship between the two becomes weaker under stress, particularly when bacteria undergo substantial changes in gene expression.

The study identified numerous genes whose mRNA and protein levels responded differently to environmental stress. While essential genes generally maintained stable expression and stronger mRNA–protein correlations, genes involved in active stress responses showed greater discrepancies. Notably, osmotic stress caused particularly pronounced differences between mRNA and protein levels. Further experimental analyses revealed that reduced protein synthesis contributed to this effect, demonstrating how bacterial stress responses can interfere with the translation of genetic information into functional proteins.

These findings highlight the importance of combining transcriptomics and proteomics to understand bacterial adaptation, rather than relying on mRNA measurements alone. The study also provides a comprehensive, openly available dataset that can support further investigations into bacterial gene regulation, stress-response mechanisms, and potential antimicrobial targets.

This work offers valuable insights into the molecular mechanisms that enable bacterial pathogens to survive challenging conditions within the human host. Researchers working in bacterial pathogenesis, infectious diseases, microbial stress responses, multi-omics, systems biology, and antimicrobial drug discovery will find this resource particularly relevant.

To find out more about the study, please read the data highlight.

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