Recruits the lipid transfer protein VPS13 to the prospore membrane during sporulation, thereby aiding prospore membrane formation. Interacts (via PxP motif) with VPS13 (via SHR-BD domain); during prospore membrane formation. Expressed during sexual reproduction; expression increases during meiosis II (at protein level). Abnormal prospore membrane formation (PubMed:22611022, PubMed:24036347). Abolishes localization of VPS13 to the prospore membrane (PubMed:24036347). Accumulation of vesicles within the prospore membrane lumen and reduction of phosphatidylinositol in the membrane (PubMed:24036347). Abnormal spore wall formation; the first three layers are synthesized but abnormally deposited and the dityrosine layer is missing (PubMed:22611022). Sporulation specific septins are mislocalized (PubMed:22611022). Belongs to the SPO71 family.