Essential for viral fusion with host endosomal membrane and core release (By similarity). Not required for virus morphogenesis and egress (By similarity). Induces complete autophagy through the interaction with and down-regulation of host PYCR2 (By similarity). Interacts with host PYCR2; this interaction results in autophagy activation. Found in the perinuclear cytoplasmic viral factories during assembly (By similarity). Part of the virion inner membrane (By similarity). Expressed in the late phase of the viral replicative cycle. Belongs to the asfivirus E199L family.