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. Probably involved in defense against bacteriophages. Expression of bGSDM and this neighboring protease is highly toxic in E.coli. Active between pH 6.0 and 10.2. Might be a Bacteriodetes scaffold.