Self-assembles to form a helical, filamentous nucleocapsid (PubMed:25999507). The capsid proteins wrap around the DNA and maintain it in an A-form by non-specific desolvation and specific coordination of the DNA phosphate groups by positively charged residues (Probable) (PubMed:25999507). This certainly protects the viral DNA under conditions such as the extreme desiccation of its host (Probable). Homodimer.