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  2. Retrotransposon - Wikipedia

    en.wikipedia.org/wiki/Retrotransposon

    Through reverse transcription, retrotransposons amplify themselves quickly to become abundant in eukaryotic genomes such as maize (49–78%) [3] and humans (42%). [4] They are only present in eukaryotes but share features with retroviruses such as HIV, for example, discontinuous reverse transcriptase-mediated extrachromosomal recombination. [5] [6]

  3. LTR retrotransposon - Wikipedia

    en.wikipedia.org/wiki/LTR_retrotransposon

    The Pol gene produces three proteins: a protease (PR), a reverse transcriptase endowed with an RT (reverse-transcriptase) and an RNAse H domains, and an integrase (IN). [8] Typically, LTR-retrotransposon mRNAs are produced by the host RNA pol II acting on a promoter located in their 5’ LTR. The Gag and Pol genes are encoded in the same mRNA.

  4. Long terminal repeat - Wikipedia

    en.wikipedia.org/wiki/Long_terminal_repeat

    Identical LTR sequences at either end of a retrotransposon. 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.

  5. Transposable element - Wikipedia

    en.wikipedia.org/wiki/Transposable_element

    The reverse transcription step is catalyzed by a reverse transcriptase, ... The provirus is a specialized form of eukaryotic retrotransposon, ...

  6. Reverse transcriptase - Wikipedia

    en.wikipedia.org/wiki/Reverse_transcriptase

    A reverse transcriptase (RT) is an enzyme used to convert RNA genome to DNA, a process termed reverse transcription.Reverse transcriptases are used by viruses such as HIV, COVID-19, and hepatitis B to replicate their genomes, by retrotransposon mobile genetic elements to proliferate within the host genome, and by eukaryotic cells to extend the telomeres at the ends of their linear chromosomes.

  7. Long interspersed nuclear element - Wikipedia

    en.wikipedia.org/wiki/Long_interspersed_nuclear...

    Following the reverse transcription the target strand is cleaved and the newly created cDNA is integrated [31] New insertions create short target site duplications (TSDs), and the majority of new inserts are severely 5’-truncated (average insert size of 900bp in humans) and often inverted (Szak et al., 2002).

  8. Endogenous retrovirus - Wikipedia

    en.wikipedia.org/wiki/Endogenous_retrovirus

    [5] [6] They are distinguished as germline provirus retroelements due to their integration and reverse-transcription into the nuclear genome of the host cell. Researchers have suggested that retroviruses evolved from a type of transposon called a retrotransposon , a Class I element; [ 7 ] these genes can mutate and instead of moving to another ...

  9. Short interspersed nuclear element - Wikipedia

    en.wikipedia.org/wiki/Short_interspersed_nuclear...

    Moreover, non-coding RNAs like SINEs can bind or interact directly with the DNA duplex coding the gene and thus prevent its transcription. [15] Also, many non-coding RNAs are distributed near protein-coding genes, often in the reverse direction. This is especially true for short-interspersed nuclear elements as seen in Usmanova et al.

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