Probably a dedicated protease for substrate gasdermin bGSDM; cleaves the bGSDM precursor, releasing the pore-forming moiety, which integrates into the membrane and triggers cell death. Involved in defense against bacteriophages (Probable). Expression of gasdermin bGSDM and this neighboring protease is toxic in E.coli on solid medium (PubMed:35025633). Belongs to the peptidase S1 family.