Notes on Genus: Large satellite RNAs

no particles of their own

Type member:

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 three groups of ss satellite RNAs. Like the other groups, the RNA is encapsidated within the coat protein of its helper virus. Members are distinguished by having genomes of 0.8-1.5kb, encoding a single, non-structural protein, whereas members of the other groups have smaller genomes and do not encode any functional protein. They rarely modify the symptoms induced by the helper virus.

Morphology

There are no distinctive virions, because the satellite RNA is encapsidated by the helper virus.

Genome

Monopartite, single-stranded, positive sense RNA of 800-1500 nucleotides.

Genus Genomic Organization

The RNA encodes a single, non-structural protein which (at least in some members) is essential for satellite RNA replication. Little sequence homology exists between the satellite RNA and its helper virus.

Type Member Genomic Organization

Monopartite, single-stranded, positive sense RNA of about 1370 nucleotides. The RNA encodes a single, non-structural protein of about 48 kDa which is essential for satellite RNA replication. Little sequence homology exists between the satellite RNA and its helper virus.