Notes on Genus: Betacryptovirus

icosahedra

Type member: White clover cryptic virus 2

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 2 plant virus genera in the family Partitiviridae. Both genera have double stranded bipartite RNA genomes, isometric particles, and cause latent infections in plants. The name is from the Greek crypto, meaning "hidden". Members of this genus have larger particles (38nm) than those of the genus Alphacryptovirus and are not serologically related to them.

Morphology

Virions isometric (icosahedral), not enveloped, 38 nm in diameter.

Virions composed of 24% nucleic acid.

Genome

Bipartite, linear, double stranded RNA, typically of about 2.45 and 2.35 kbp.

Genus Genomic Organization

The RNAs are both monocistronic. RNA1 encodes the coat protein and RNA2 a polymerase.

Type Member Genomic Organization