Notes on Genus: Cilevirus

bacilliform

Type member: Citrus leprosis virus C

Contents

Members of this Genus
General Description
Morphology
Electron Micrograph
Genome
Genus Genomic Organization
Genome Map
Type Member Genomic Organization
All Known Sequences
Curated Sequences

General Description

This genus contains plant-infecting cytoplasmic viruses with bacilliform particles and a bi-partite polyadenylated ssRNA(+) genome. Particle morphology and cytopathology had originally led to these viruses being considered members of the family Rhabdoviridae but sequence data now show them to be very different. Transmission is by mites of the genus Brevipalpus. The genus name is taken from the type member, Citrus leprosis virus C.

Morphology

Virions are bacilliform c. 150 x 50 nm, resembling those of rhabdoviruses.

Genome

Bipartite, linear, polyadenylated ssRNA of about 8.7 and 5.0 kb.

Genus Genomic Organization

There are two ORFs on RNA1, including a replication polyprotein of the "alpha supergroup" distantly related to the families Closteroviridae, Bromoviridae and Virgaviridae. RNA2 has four ORFs including a cell-to-cell movement protein. Presumably at least some of the other ORFs are structural proteins.

Type Member Genomic Organization

RNA1 (8745 nt) has two ORFs:
  1. 286 kDa replication protein
  2. 29 kDa unknown function
RNA2 (4986 nt) has four ORFs:
  1. 15 kDa of unknown function
  2. 61 kDa of unknown function
  3. 32 kDa putative cell-to-cell movement protein
  4. 24 kDa of unknown function