Serine protease effector that inhibits host cell autophagy by targeting SNX17 (PubMed:28504273). Localizes to the host endoplasmic reticulum-mitochondria contact site and catalyzes degradation of host SNX17, thereby impairing endoplasmic reticulum-mitochondria communication, leading to inhibit autophagy as well as staurosporine-induced apoptosis (PubMed:28504273). Localizes to the host mitochondria-associated endoplasmic reticulum membrane (MAM). According to a report based on bioinformatics studies, this protein is not related to serine proteases but is homologous to mitochondrial SLC25 carrier proteins. Additional experimental evidences are needed to confirm this prediction.