Participates in the transport of viral genome to neighboring plant cells directly through plasmodesmata, without any budding (PubMed:9721240). Multifunctional movement protein with RNA-binding, ATPase and helicase activities (By similarity). Engages in homologous interactions leading to the formation of a ribonucleoprotein complex containing plus-sense viral RNAs (vRNPs) (By similarity). ATPase activity is probably required for vRNPs movement complex assembly (By similarity). Intracellular delivery of TGBp1-containing vRNPs to plasmodesmata is facilitated by TGBp2 and TGBp3 (By similarity). ATP + H2O = ADP + H(+) + phosphate Homooligomer. Interacts with movement protein TGB3. TGB1-TGB3-TGB2 complex formation is enhanced by ATP hydrolysis. Interacts with the suppressor of RNA silencing (via N-terminus). TGB1 nuclear-cytoplasmic trafficking is required for cell-to-cell movement and systemic infection (By similarity). Associates with host microtubules (By similarity). Belongs to the virgaviridae/benyvirus TGB1 movement protein family.