A nest of long terminal repeat (LTR) retrotransposons (RTRs), discovered by LTR_STRUC analysis, is near core genes encoding the NPR1 disease resistance-activating factor and a heat-shock-factor-(HSF-) like protein in sugarbeet hybrid US H20. SCHULTE, a 10 833 bp LTR retrotransposon, with 1372 bp LTRs that are 0.7% divergent, has two ORFs with unexpected introns but encoding a reverse transcript...

The Cancer Genome Atlas project was initiated by the National Cancer Institute in order to characterize the genomes of hundreds of tumors of various cancer types. While much effort has been put into detecting somatic genomic variation in these data, somatic structural variation induced by the activity of transposable element insertions has not been reported. Transposable elements (TEs) are part...

Yeast and mammalian genomes are replete with nearly identical copies of long dispersed repeats in the form of retrotransposons. Mechanisms clearly exist to maintain genome structure in the face of potential rearrangement between the dispersed repeats, but the nature of this machinery is poorly understood. Here we describe a series of distinct "retrotransposon overdose" (RO) lineages in which th...

SIRE1 is an active and relatively high copy-number retroelement belongs to the Tyl/Copia long terminal repeat (LTR) retrotransposon superfamily. Distinctive elements (ENV GAG) distributions in barley genome were observed by using fluorescent situ hybridization (FISH). We performed PCR obtain tetramethylrhodamine-dUTP (TRITC)-labelled probes. Localizations of ENV GAG domains demonstrated under c...

Retrotransposons with long terminal repeats (LTR) form a significant proportion of eukaryotic genomes, especially in plants. They have gag and pol genes and several regulatory regions necessary for transcription and reverse transcription. We searched for potential quadruplex-forming sequences (PQSs) and potential triplex-forming sequences (PTSs) in 18 377 full-length LTR retrotransposons collec...

Proteins of the Argonaute family have been identified as key components of RNA interference (RNAi) pathway. RNAi-related mechanisms are implicated in the regulation of gene expression and repression of transposable elements in eukaryotes. The piwi gene encoding protein of the Drosophila Argonaute family was shown to be required for the germ stem cells maintenance. Here, we show that piwi is inv...

Retrotransposons constitute more than 40 percent of the human genome with L1, Alu, SVA, and HERVs known to remain active in transposition. Retrotransposition contribute to genetic diversity in the form of retrotransposon insertion polymorphism (RIP) that is defined as the presence or absence of a retrotransposon insertion among human populations at a specific genomic location. So far close to 5...