Transports viral genome to neighboring plant cells directly through plasmosdesmata, without any budding. The movement protein allows efficient cell to cell propagation, by bypassing the host cell wall barrier. Forms a ribonucleoprotein complex with viral RNA. Binds microtubules and modulates microtubule stability. Can bind double-stranded DNA. Evades host resistance (R) protein (e.g. tomato ToMV resistance protein TM-2(2), AC Q71BG9) in ToMV/TMV resistant plants (PubMed:28107419). Binds to host RBCS at the plasmodesmata; this interaction seems required for viral systemic movement. Binds to the host cytoskeleton before being transported to the host plasmodesmata. The ToBRFV MVP has gained resistance to antiviral Tm-2(2) defense, thereby allowing it to spread from Jordan to most of the world tomato's cultures and pose a major threat to agriculture. Belongs to the tobamovirus movement protein family.