Canadian Medical Guide > Chemicals and Drugs > Nucleic Acids, Nucleotides, and Nucleosides > Nucleic Acids > RNA > RNA, Satellite Terms and Definitions




RNA, Satellite

Medical Definition: Small, linear single-stranded RNA molecules functionally acting as molecular parasites of certain RNA plant viruses. Satellite RNAs exhibit four characteristic traits: (1) they require helper viruses to replicate; (2) they are unnecessary for the replication of helper viruses; (3) they are encapsidated in the coat protein of the helper virus; (4) they have no extensive sequence homology to the helper virus. Thus they differ from SATELLITE VIRUSES which encode their own coat protein, and from the genomic RNA; (=RNA, VIRAL); of satellite viruses. (From Maramorosch, Viroids and Satellites, 1991, p143)
Guide Notes: RNA molecules acting as molecular parasites of various RNA plant viruses; coord IM with specific plant virus /genet (IM or NIM) but note that CUCUMBER MOSAIC VIRUS SATELLITE is available
Previously Indexed: RNA (1981-1996),RNA, Viral (1974-1996)
RNA, Satellite Categories.
Canadian Medical Guide Definition Cucumber Mosaic Virus Satellite - A satellite RNA (not a satellite virus) which has several types. Different cucumoviruses can act as helper viruses for different types.

RNA, Satellite Medical Definitions and Terms

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