RNA viruses

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Related to RNA viruses: Dna viruses

RNA viruses,

n See viruses.


ribonucleic acid.

RNA interference (RNAi)
the functional inactivation of specific genes by experimental introduction of a corresponding double stranded RNA, which induces degradation of the complementary single-stranded mRNA encoded by the gene but not that of mRNAs with different sequences. See microRNA and gene silencing.
microRNA (miRNA)
small RNAs containing 21 to 33 nucleotides that associated with multiple proteins in a RNA-induced silencing complex (RISC) that repress transcription of specific target mRNA by hybridizing to its 3' untranslated region.
RNA primer
a sequence of about 10 nucleotides long copied from DNA by RNA primase and required for the priming of the synthesis of each Okazaki fragment during DNA replication.
secondary structure RNA
folding of single-stranded RNA molecules which arises from intramolecular base pairing.
small cytoplasmic RNA (scRNA)
small (7S; 129 nucleotides) RNA molecules found in the cytosol and rough endoplasmic reticulum associated with proteins that are involved in specific selection and transport of other proteins.
small nuclear RNA (snRNA)
a general term for many diferent kinds of small RNA molecules found in the nucleus of a cell that include as examples species involved in splicing of introns from mRNA and in RNA interference.
RNA viruses
viruses distinguished by having a ribonucleic acid genome, usually as a single strand which may be positive or negative sense, a single molecule or a segmented; in at least two families the genome is a double-strand segmented form.
References in periodicals archive ?
As part of their survival mechanism, RNA viruses mutate often, and drugs intended for them usually become ineffective over time.
Boehr explained that what he and his team discovered about motif D's function in the polio strain is applicable to many other RNA viruses such as the common cold.
However, RDV would be useful for species-independent detection of RNA viruses including unknown or untypeable emerging RNA viruses.
His studies provided the first description and molecular analysis of a viral-encoded IFN antagonist among negative-strand RNA viruses.
The structure of the TSV genome is similar to that of small insect--infecting RNA viruses (10), which belong to a renamed virus genus, Cripavirus (11).
Recombination among nonsegmented RNA viruses was once thought to be uncommon.
Coronaviruses are enveloped, plus-stranded RNA viruses that cause important respiratory and enteric diseases of humans and many animal species.
Like most of the RNA viruses, flaviviruses are characterized by a high degree of genomic variability (2,3).
Because HCV and other single-stranded RNA viruses have relatively simple genetic structures, they are attractive targets for AVI's NEUGENE antisense, which is designed to target conserved portions of the viral genetic code that are not likely to mutate over time.
Several human and animal virus diseases, generally caused by RNA viruses, have emerged in the last 40 years (1,2).
Netesov, an international editor of this journal, is deputy director for research and head of the Laboratory of Molecular Biology of RNA viruses of the State Research Center of Virology and Biotechnology Vector, Koltsovo, Novosibirsk Region, Russia.