Human metapneumovirus (strain CAN97-83) Matrix protein (His & Myc)

Plays a crucial role in virus assembly into filaments and budding. Early in infection, localizes in the nucleus where it may inhibit host cell transcription. Later in infection, traffics to the cytoplasm through the action of host CRM1 to associate with inclusion bodies, the site of viral transcription and replication. During virus assembly and budding, acts as a bridge between the nucleocapsid and the lipid bilayer.