Transports viral genome to neighboring plant cells directly through plasmosdesmata, without any budding (PubMed:8623554). The movement protein allows efficient cell to cell propagation, by bypassing the host cell wall barrier (PubMed:8623554). Acts as a suppressor of RNA-mediated gene silencing, also known as post-transcriptional gene silencing (PTGS), a mechanism of plant viral defense that limits the accumulation of viral RNAs (PubMed:28994713). The N-terminus forms a amphiphilic alpha-helix, which partitions into the nuclear membrane. Belongs to the luteoviruses movement protein family.