NDLI: HeT-A elements in Drosophila virilis: Retrotransposon telomeres are conserved across the Drosophila genus

Content Provider	PubMed Central
Author	Casacuberta, Elena Pardue, Mary-lou
Copyright Year	2003
Abstract	Drosophila melanogaster telomeres are composed of two retrotransposons, HeT-A and TART. Drosophila virilis has recently been shown to have telomere-specific TART elements with many of the characteristics of their D. melanogaster homologues. We now report identification of the second telomere-specific retrotransposon, HeT-A, from D. virilis. These results show that HeT-A and TART have been maintaining telomeres in Drosophila for more than the 60 million years that separate D. melanogaster and D. virilis. All Drosophila species and stocks studied have both of these telomeric elements, suggesting that the elements collaborate, an assumption supported by evidence from D. melanogaster that their Gag proteins interact. Although the HeT-A sequence evolves at a high rate, the element retains the unusual structural features that characterize all HeT-A homologues. These features may be involved in the role of HeT-A at the telomere. The Gag protein from HeT-Avir is as much like TART Gag from other species as it is like HeT-A Gag, suggesting that these Gags are evolving under similar constraints, probably to maintain appropriate interactions with host telomeres and possibly to allow collaborative interactions like those seen in D. melanogaster. In addition, we have identified a chimeric element, Uvir , carrying a pol coding sequence only distantly related to sequences thus far found in any telomere arrays.
Related Links	http://dx.doi.org/10.1073/pnas.1936193100
Ending Page	14096
Page Count	6
Starting Page	14091
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	24
Volume Number	100
Language	English
Publisher	National Academy of Sciences
Publisher Date	2003-11-25
Access Restriction	Open
Rights Holder	National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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HeT-A elements in Drosophila virilis: retrotransposon telomeres are conserved across the Drosophila genus.

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HeT-A elements in Drosophila virilis: Retrotransposon telomeres are conserved across the Drosophila genus

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