Notes on Genus: Large satellite RNAs
no particles of their own
Type member:
Contents
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.
