Abstract
Transposable elements (TEs) account for nearly half (44 %) of the human genome. However, their overall activity has been steadily declining over the past 35–50 million years, so that <0.05 % of TEs are presumably still “alive” (potentially transposable) in human populations. All the active elements are retrotransposons, either autonomous (LINE-1 and possibly the endogenous retrovirus ERVK), or non-autonomous (Alu and SVA, whose transposition is dependent on the LINE-1 enzymatic machinery). Here we show that a lineage of the endogenous retrovirus ERVE was recently engaged in ectopic recombination events and may have at least one potentially fully functional representative, initially reported as a novel retrovirus isolated from blood cells of a Chinese patient with chronic myeloid leukemia, which bears signals of positive selection on its envelope region. Altogether, there is strong evidence that ERVE should be included in the short list of potentially active TEs, and we give clues on how to identify human specific insertions of this element that are likely to be segregating in some of our populations.
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Acknowledgments
We thank C. Phillips and. M. V. Lareu for kindly letting us use their copy of the HGDP-CEPH Human Genome Diversity Panel.
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The authors declare that they have no competing interests.
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10709_2014_9789_MOESM2_ESM.pdf
Figure S1. Phylogenetic relationships within the ERVE family based on the analysis of gag, pr, rt and rh gene nucleotide sequences. (PDF 1051 kb)
10709_2014_9789_MOESM3_ESM.pdf
Figure S2. Multiple nucleotide alignment of HCML-ARV with the consensus of subfamily VIIa and the orthologous copies of provirus 022319 in humans and chimpanzees. (PDF 87 kb)
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Naveira, H., Bello, X., Abal-Fabeiro, J.L. et al. Evidence for the persistence of an active endogenous retrovirus (ERVE) in humans. Genetica 142, 451–460 (2014). https://doi.org/10.1007/s10709-014-9789-y
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DOI: https://doi.org/10.1007/s10709-014-9789-y