Bridge-like phospholipid transfer protein; role in PL transfer from the ER to the phagophore at membrane contact sites; peripheral membrane protein required for vesicle formation during autophagy, pexophagy, bulk microautophagy and the CVT pathway; directed to autophagic membranes by Atg18p where it acts as a PAS-ER membrane tether during autophagosome formation; role in Atg9p cycling between the PAS and mitochondria; APT1 domain  binds PI(3)P; forms cytoplasmic foci upon DNA replication stress