EndD mediates butyrate-dependent toxin release and sporulation in Clostridioides difficile.

Butyrate triggers C. difficile toxin release and sporulation through EndD, a conserved endolysin regulated by sporulation sigma factor SigK.

• Why it matters: Understanding how gut microbiome metabolites influence C. difficile pathogenesis is crucial for developing targeted, non-antibiotic treatments to reduce resistance and recurrence.
• What they did: The study examined the role of EndD in butyrate-dependent toxin release and sporulation, revealing that EndD expression is controlled by SigK and is essential for these processes under specific growth conditions.
• The result: Findings suggest EndD as a potential therapeutic target to disrupt toxin production and transmission, advancing strategies to combat C. difficile infections by modulating microbiome interactions.