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Alu elements represent a family of short interspersed DNA elements (SINEs) found in primate genomes. These are members of a group of transposable elements that integrate into the genome by the process of retrotransposition. Recent integrations of Alu elements within the human genome have generated presence/absence variants useful as DNA markers in human population studies as well as in forensic and...
LINE-1 (L1) retrotransposons constitute the most successful family of autonomous retroelements in mammals and they represent at least 17% of the size of the human genome. L1 insertions have occasionally been recruited to perform a beneficial function but the vast majority of L1 inserts are either neutral or deleterious. The basis for the deleterious effect of L1 remains a matter of debate and three...
The non-LTR retrotransposon LINE-1 (L1) comprises ∼17% of the human genome, and the L1-encoded proteins can function in trans to mediate the retrotransposition of non-autonomous retrotransposons (i.e., Alu and probably SVA elements) and cellular mRNAs to generate processed pseudogenes. Here, we have examined the effect of APOBEC3G and APOBEC3F, cytidine deaminases that inhibit Vif-deficient HIV-1...
The realization of cross talks between transposable elements of class I and their host genome involves non-histonic chromatin proteins. These interactions have been widely analyzed through the characterization of the gypsy retrotransposon leader region, which holds a particularly strong insulator element, and the proteins required for its function, Su(Hw), Mod(mdg4), and Cp190. Here we provide evidence...
Long interspersed elements (LINEs) are autonomous transposable elements that proliferate via retrotransposition, which involves reverse transcription of LINE RNAs. It is anticipated that LINE retrotransposition requires both LINE-encoded proteins and host-encoded proteins. However, identification of the host factors, their roles, and the steps at which they act on retrotransposition are poorly understood...
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