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Plant Virus Satellites

Plant Virus Satellites There is a growing number of reports of RNA plant viruses that have associated with them particles containing RNAs with no nucleotide sequence homology to either the viral or host genomes. These particles, usually referred to as sat­ ellites, are completely dependent for their replication on the helper viruses with 0066-4227/85/1001-0151$02.00 FRANCKI which they are associated. Satellites usually interfere with helper-virus synthe­ sis and modify disease-symptom expression on the host plants. They can be looked upon as molecular parasites. The RNAs of some satellites have the genetic information for and function as messengers for the synthesis of their own coat protein. In such cases their particles differ from those of their helper viruses; they will be referred to here as satellite viruses. The satellite of tobacco necrosis virus (89) is the classical example of a satellite virus. Other satellites do not possess the genetic informa­ tion for a coat protein but use that of their helper virus; they will be referred to as satellite RNAs. Their particles are morphologically and antigenic ally in­ distinguishable from those of their helper viruses, although their sedimentation rates and buoyant densities may differ. Examples of extensively studied sat­ ellite RNAs are those http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annual Review of Microbiology Annual Reviews

Plant Virus Satellites

Francki, R I B
Annual Review of Microbiology , Volume 39 (1) – Oct 1, 1985
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Publisher
Annual Reviews
Copyright
Copyright 1985 Annual Reviews. All rights reserved
Subject
Review Articles
ISSN
0066-4227
eISSN
1545-3251
DOI
10.1146/annurev.mi.39.100185.001055
pmid
3904598
Publisher site
See Article on Publisher Site

Abstract

There is a growing number of reports of RNA plant viruses that have associated with them particles containing RNAs with no nucleotide sequence homology to either the viral or host genomes. These particles, usually referred to as sat­ ellites, are completely dependent for their replication on the helper viruses with 0066-4227/85/1001-0151$02.00 FRANCKI which they are associated. Satellites usually interfere with helper-virus synthe­ sis and modify disease-symptom expression on the host plants. They can be looked upon as molecular parasites. The RNAs of some satellites have the genetic information for and function as messengers for the synthesis of their own coat protein. In such cases their particles differ from those of their helper viruses; they will be referred to here as satellite viruses. The satellite of tobacco necrosis virus (89) is the classical example of a satellite virus. Other satellites do not possess the genetic informa­ tion for a coat protein but use that of their helper virus; they will be referred to as satellite RNAs. Their particles are morphologically and antigenic ally in­ distinguishable from those of their helper viruses, although their sedimentation rates and buoyant densities may differ. Examples of extensively studied sat­ ellite RNAs are those

Journal

Annual Review of Microbiology – Annual Reviews

Published: Oct 1, 1985

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