Involved in the intracellular transport of virions to the host cell surface. Participates also in the formation of actin tails at the plasma membrane to allow efficient actin-based motility and thus cell to cell transmission of viral particles. Mechanistically, phosphorylation of Tyr-112 and 132 of A36 activates the host ARP2-ARP3 complex and leads to actin nucleation (By similarity). Interacts with host NCK. Interacts with protein A33 (via C-terminus). Interacts with protein F12. Interacts (via C-terminus) with host kinesin light chain 1 (KLC1) (By similarity). Found exclusively on the wrapped enveloped virion. Absent in the mature virion (MV) and extracellular enveloped virion (EV) (By similarity). Belongs to the orthopoxvirus A36 protein family.