Encapsidates the genome in a ratio of one N per nine ribonucleotides, protecting it from nucleases. The encapsidated genomic RNA is termed the NC and serves as template for transcription and replication. Replication is dependent on intracellular concentration of newly synthesized N, termed N(0), which corresponds to the protein not associated with RNA. In contrast, when associated with RNA, it is termed N. During replication, encapsidation by N(0) is coupled to RNA synthesis and all replicative products are resistant to nucleases (By similarity). Homomultimerizes to form the nucleocapsid. Binds to viral genomic RNA. N in nucleocapsid binds the P protein and thereby positions the polymerase on the template. Interaction of N(0) with the P protein prevents the uncontrolled aggregation of N(0) (By similarity). The nucleocapsid is synthesized in the cytoplasm, and is subsequently transported via microtubules to the cell periphery. Belongs to the vesiculovirus nucleocapsid protein family.