Notes on Genus: Solendovirus

icosahedra

Type member: Tobacco vein clearing virus

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 is one of 7 genera in the family Caulimoviridae, which are distinctive amongst plant viruses in having double-stranded DNA. Members of this genus are those with isometric, rather than bacilliform particles and with 4 major open reading frames in the genome. The type member of the genus was previously classified in the genus Cavemovirus, but there are differences in gene organisation (the coat protein and movement proteins are encoded in different ORFs) and substantial divergence in sequence. The name reflects the nature of the type species as a Solanaceae endogenous virus.

Morphology

Virions isometric, not enveloped, 45-50 nm in diameter with no obvious surface structure. The virion shell is multi-layered.

Virions composed of 16 % nucleic acid.

Genome

Monopartite, open circular, double stranded DNA of 7800-8800 base pairs.

Genus Genomic Organization

Four major open reading frames have been identified.

Type Member Genomic Organization

There are believed to be 4 open reading frames:
1 69 kDa coat protein
2 49 kDa movement protein
3 76 kDa polyprotein containing proteinase and reverse transcriptase motifs
4 48 kDa transactivator factor