Notes on Genus: Cytorhabdovirus
Type member: Lettuce necrotic yellows virus
- Members of this Genus
- General Description
- Electron Micrograph
- Genus Genomic Organization
- Genome Map
- Type Member Genomic Organization
- All Known Sequences
- Curated Sequences
General DescriptionThis is one of 2 plant virus genera in the family Rhabdoviridae. It was previously known as Plant Rhabdovirus group A. The genus is characterised by its bacilliform, enveloped, particles which contain a monopartite ssRNA genome and which mature in the cytoplasm of the host plant cell. The name derives from the Greek cyto = cell and rhabdos = rod.
MorphologyVirions regular in shape and size to pleomorphic in shape and size (in unfixed preparations), bacilliform (when fixed prior to negative staining), enveloped, 200-350 nm long and 70-95 nm in diameter. There are distinct surface projections (spikes) dispersed evenly over all the surface. Nucleocapsids filamentous (when uncoiled), with obvious regular cross-banding and with a distinct central canal. Symmetry helical with pitch of 4.2-4.7 nm.
Virions composed of 1 % nucleic acid, 70 % protein and 25 % lipid.
GenomeMonopartite, linear, single-stranded, negative sense RNA, 11000-15000 nucleotides long.
Genus Genomic OrganizationThe genome organisation is typical of the family with the "standard" genes N, P, M, G and L in order on the template strand. Depending on the species, there are one or more additional genes located between P and M.
Type Member Genomic OrganizationThere are 6 genes which are listed here in their order on the template strand (i.e. from 3' to 5' with respect to the virion strand):
|ORF|| Gene ||Product||Function|
|1||N||50.7 kDa||Coat protein (nucleocapsid)|
|3||4b||33.7 kDa||unknown function|
|4||M||19.5 kda||Matrix protein|
|6||L||236.6 kDa ||Polymerase|