Notes on Genus: Omegatetravirus

icosahedra

Type member: Nudaurelia capensis omega virus

Contents

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

General Description

This is one of two genera in the family Alphatetraviridae and consists of those viruses with bipartite genomes.

Morphology

Virions isometric (icosahedral), not enveloped, about 40 nm in diameter with T=4 icosahedral shell quasi-symmetry.

Genome

Bipartite positive sense single-stranded RNA without a 3'-polyA tail of about 5.3 and 2.5 kb in length.

Genus Genomic Organization

The RNA polymerase (of about 188 kDa in HaSV) is encoded on RNA1, while RNA2 encodes a coat protein precursor (71 kDa in HaSV; processed into products of 63 and 7 kDa) and a non-structural 17 kDa protein of unknown function.

Type Member Genomic Organization

The type member has not been completely sequenced.