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

Butyrate-dependent toxin release in Clostridioides difficile is mediated by EndD, a conserved endolysin, and is linked to sporulation via SigK regulation.

• Why it matters: Understanding how C. difficile interacts with microbiome-derived metabolites like butyrate is crucial for developing targeted treatments that avoid antibiotic resistance and recurrence.
• What they did: The study examined the role of EndD in toxin release and sporulation, showing that butyrate enhances EndD expression independently of classical secretion pathways, with regulation dependent on SigK.
• The result: Findings reveal that EndD mediates butyrate-dependent toxin release and promotes sporulation, providing insights into pathogen-microbiome interactions and potential non-antibiotic therapeutic targets.