Notes on Family: Tymoviridae
This family is characterised icosahedral virions about 30 nm in diameter and a single component of single-stranded C-rich RNA. The RNA encodes a large replication protein and a coat protein translated from a 3'-coterminal subgenomic RNA. There are additional ORFs in some genera.
Virions isometric and icosahedral (T=3), not enveloped, about 30 nm in diameter.
Monopartite positive sense single-stranded RNA of about 6-7.5 kb. The RNA encodes a large replication protein and a coat protein translated from a 3'-coterminal subgenomic RNA. The 3'-terminus may have a tRNA-like structure or a polyA tract, depending upon the virus.
Genera in the Family
- Maculavirus: genome >7kb; phloem-limited; no known vectors
- Marafivirus: genome 6-7kb; two coat proteins; transmitted by leafhoppers
- Tymovirus: genome 6-7kb; single coat protein; transmitted by sap and by beetles