Notes on Family: Other ss satellite DNAs

no particles of their own

Contents

Members of this Family
General Description
Morphology
Genome
Genera in the Family
All Known Sequences
Curated Sequences

General Description

Satellites are sub-viral agents composed of nucleic acid molecules that depend for their replication on co-infection of a host cell with a specific helper virus. Nucleotide sequences are substantially distinct from those of the genomes of the helper virus and of the host. Replication of the helper virus is often decreased and virus symptoms may be modified.

Satellite nucleic acids consist of those satellites that do not encode their own coat protein (unlike satellite viruses) but are encapsidated in that of the helper virus. Particles containing satellite nucleic acid are therefore antigenically identical to those of the helper virus but can sometimes be distinguished by physical features such as sedimentation rates.

All known single stranded satellite DNAs are associated with plant viruses. Satellites are not formally classified into families, genera and species but most clearly group as either alphasatellites or betasatellites. This page provides links to a few other begomovirus-associated satellite DNAs.

Morphology

There are no distinctive virions because they are encapsidated in the coat protein of their helper virus.

Genome

Monopartite, circular, ssDNA of 1000-1350nt.

Genera in the Family

This page provides links to a few other begomovirus satellite DNAs.