Notes on Genus: Allolevivirus
Type member: Enterobacteria phage Qb
This is one of the genera in the family Leviviridae
. Members have a genome of more than 4 kb which does not encode a separate lysis gene.
Virions isometric (icosahedral), not enveloped, c.
26 nm in diameter.
Monopartite, linear, postive sense ssRNA of 4-4.5 kb.
Genus Genomic Organization
There are 4 separate proteins encoded, including a capsid protein, a capsid protein readthrough, and a replicase.
Type Member Genomic Organization
The 4 encoded proteins are
- A protein, 48.5 kDa (required for attachment and virion maturation)
- Capsid protein, 14.2 kDa
- Capsid protein with readthrough, 35.8 kDa
- Replicase, 65.9 kDa