Capsid protein self-assembles to form rod-shaped virions about 21,6 nm in diameter for the narrow nes and 22,4 for the wide ones, and 110-150 nm in length depending on the size of the encapsidated RNA (PubMed:23725818, PubMed:26278173). They display a helical symmetry of 23.2 subunits per turn of the viral helix and with a central canal enclosing the viral genomic RNA (PubMed:23725818). Interacts with itself. The genome of this virus consists of three linear, positive, single-stranded RNAs encapsidated in separate virions designated RNA-alpha, RNA-beta and RNA-gamma. Three proteins (alpha-A, beta-A and gamma-A) are translated directly from these genomic RNAs and the remaining proteins encoded on RNA-beta (beta-B, beta-C and beta-D) and RNA-gamma (gamma-B) are expressed via three subgenomic messenger RNAs. Belongs to the virgaviridae capsid protein family.