retrotransposon


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ret·ro·pos·on

(ret'rō-pōz'on),
1. A transposition of sequences in a DNA that does not originate in the DNA but rather in an mRNA that is transcribed back into the genomic DNA by reverse transcription. Synonym(s): retrotransposon
2. A transposable element.
[retro- + L. pono, pp. positum, to place, + -on]

retrotransposon

(rĕt′rō-trăns-pō′zŏn)
n.
A transposon copied from RNA with the use of reverse transcriptase.

retrotransposon

a type of TRANSPOSABLE GENETIC ELEMENT, found in eukaryotic genomes, that utilizes RNA as an intermediate and the enzyme REVERSE TRANSCRIPTASE to transpose. Reverse transcription of the RNA transcripts of the transposon produces a DNA copy that subsequently inserts into the GENOME to effect transposition. Retrotransposons may be degenerate RETROVIRUSES.
References in periodicals archive ?
Retrotransposons can act as molecular markers because they have conserved sequences and their replication leads to polymorphism in genomes.
The research team found that an important class of retrotransposons, called L1, can escape from cellular control and begin to replicate in both senescent human cells -- old cells that no longer divide -- and old mice.
The frequent transcriptional readthrough of the tobacco Tnt1 retrotransposon and its possible implications for the control of resistance genes.
Cognitive function related to the Sirh11/Zcchc16 gene acquired from an LTR retrotransposon in Eutherians.
Repetitive DNA--specifically, transposable elements (TEs)--constitutes at least 45% of the human genome, wherein the fraction of long interspersed nucleotide element (LINE) retrotransposons is 17% [1].
retrotransposons are epigenetically silenced; however, when the
In Arabidopsis, retrotransposons and transposons are activated during heat stress and are regulated by small interfering RNAs (siRNAs) (Matsunata et al., 2015).
Targeting of human retrotransposon integration is directed by the specificity of the L1 endonuclease for regions of unusual DNA structure.
Metodos: Se realizo un analisis en 30 poblaciones de frijol comun de guia con datos moleculares obtenidos con el marcador ISTR (Inverse Sequence Tagged Repeat), basado en secuencias de retrotransposones copia-like.
Retrotransposon movements could lead to major genome rearrangements because of their special transposition mechanism and may be used to analyze differences between species as a marker system.
A novel L1 retrotransposon marker for HeLa cell line identification, BioTechniques 46(4): 277-84.