- Certain yeasts produce killer toxins (mycocins) that can harm sensitive yeast and fungi, a phenomenon observed in various environmental species.
- Recent research found cheese-derived yeast strains that produce these toxins and indicated that mutants lacking the MAPK Hog1 signal pathway are more susceptible to the mycocins, unlike other mutants.
- The study revealed that while Hog1's phosphorylation is crucial for survival against these toxins and coping with osmotic and oxidative stresses, overactive catalase does not provide protection, hinting at other stress-related mechanisms involved.