Involved in resistance to Gram-positive bacteria P.aeruginosa or B.thuringiensis infection. Expressed in intestine. Induced in response to Gram-positive bacterium P.aeruginosa infection and to mitochondrial stress in the intestine (PubMed:25274306). Induced in response to Gram-positive bacterium B.thuringiensis (B-18247) infection (PubMed:21931778). Reduced survival following bacterium B.thuringiensis (B-18247) infection (PubMed:21931778). RNAi-mediated knockdown causes a reduction in survival following bacterium P.aeruginosa infection (PubMed:25274306). Belongs to the glycosyl hydrolase 25 family. Lacks conserved active site residues, suggesting it has no catalytic activity.