Suppresses apoptosis in host cell to promote the viral replication (By similarity). Has the ability to potentially bind to all the members of the proapoptotic Bcl-2 family (By similarity). Inhibits autophagy by interacting with host Beclin 1 (BECN1) (By similarity). Interacts with host BECN1 (via BH3 homology domain); this interaction allows the virus to inhibit BECN1, and thus autophagy (By similarity). Interacts with host BID (By similarity). Interacts with host BAX (By similarity). Expressed in the early phase of the viral replicative cycle (PubMed:8389936). Expressed in the late phase of the viral replicative cycle (PubMed:8389936). Belongs to the Bcl-2 family.