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  2. Provirus - Wikipedia

    en.wikipedia.org/wiki/Provirus

    A latent infection results when the provirus is transcriptionally silent rather than active. A latent infection may become productive in response to changes in the host's environmental conditions or health; the provirus may be activated and begin transcription of its viral genome. This can result in the destruction of its host cell because the ...

  3. Long terminal repeat - Wikipedia

    en.wikipedia.org/wiki/Long_terminal_repeat

    A long terminal repeat (LTR) is a pair of identical sequences of DNA, several hundred base pairs long, which occur in eukaryotic genomes on either end of a series of genes or pseudogenes that form a retrotransposon or an endogenous retrovirus or a retroviral provirus. All retroviral genomes are flanked by LTRs, while there are some ...

  4. Retrovirus - Wikipedia

    en.wikipedia.org/wiki/Retrovirus

    For this reason, an integrated provirus is a necessary for permanent and an effective expression of retroviral genes. [10] This DNA can be incorporated into host genome as a provirus that can be passed on to progeny cells. The retrovirus DNA is inserted at random into the host genome. Because of this, it can be inserted into oncogenes. In this ...

  5. LTR retrotransposon - Wikipedia

    en.wikipedia.org/wiki/LTR_retrotransposon

    LTR retrotransposons have direct long terminal repeats that range from ~100 bp to over 5 kb in size. LTR retrotransposons are further sub-classified into the Ty1-copia-like (Pseudoviridae), Ty3-like (Metaviridae, formally referred to as Gypsy-like, a name that is being considered for retirement [4]), and BEL-Pao-like (Belpaoviridae) groups based on both their degree of sequence similarity and ...

  6. Provirus silencing - Wikipedia

    en.wikipedia.org/wiki/Provirus_silencing

    Provirus silencing, or proviral silencing, is the repression of expression of proviral genes in cells. A provirus is a viral DNA that has been incorporated into the chromosome of a host cell, often by retroviruses such as HIV. [1] Endogenous retroviruses are always in the provirus state in the host cell and replicate through reverse ...

  7. Endogenous retrovirus - Wikipedia

    en.wikipedia.org/wiki/Endogenous_retrovirus

    Diagram displaying the integration of viral DNA into a host genome. Endogenous retroviruses can play an active role in shaping genomes. Most studies in this area have focused on the genomes of humans and higher primates, but other vertebrates, such as mice and sheep, have also been studied in depth.

  8. Oncovirus - Wikipedia

    en.wikipedia.org/wiki/Oncovirus

    In contrast, in slowly transforming viruses, the virus genome is inserted, especially as viral genome insertion is an obligatory part of retroviruses, near a proto-oncogene in the host genome. The viral promoter or other transcription regulation elements in turn cause overexpression of that proto-oncogene, which in turn induces uncontrolled ...

  9. Double-stranded RNA viruses - Wikipedia

    en.wikipedia.org/wiki/Double-stranded_RNA_viruses

    Double-stranded RNA viruses (dsRNA viruses) are a polyphyletic group of viruses that have double-stranded genomes made of ribonucleic acid.The double-stranded genome is used as a template by the viral RNA-dependent RNA polymerase (RdRp) to transcribe a positive-strand RNA functioning as messenger RNA (mRNA) for the host cell's ribosomes, which translate it into viral proteins.