Diaspora, a large family of Ty3 - gypsy retrotransposons in Glycine max, is an envelope-less member of an endogenous plant retrovirus lineage |
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Authors: | Sho T Yano Bahman Panbehi Arpita Das and Howard M Laten |
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Institution: | (1) Department of Molecular Genetics and Cell Biology, University of Chicago, 60637 Chicago, IL, USA;(2) Department of Biomolecular Chemistry, University of Wisconsin, 53706 Madison, WI, USA;(3) Neuronautics, Inc, 60201 Evanston, IL, USA;(4) Department of Biology, Loyola University Chicago, 60626 Chicago, IL, USA |
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Abstract: | Background The chromosomes of higher plants are littered with retrotransposons that, in many cases, constitute as much as 80% of plant
genomes. Long terminal repeat retrotransposons have been especially successful colonizers of the chromosomes of higher plants
and examinations of their function, evolution, and dispersal are essential to understanding the evolution of eukaryotic genomes.
In soybean, several families of retrotransposons have been identified, including at least two that, by virtue of the presence
of an envelope-like gene, may constitute endogenous retroviruses. However, most elements are highly degenerate and are often
sequestered in regions of the genome that sequencing projects initially shun. In addition, finding potentially functional
copies from genomic DNA is rare. This study provides a mechanism to surmount these issues to generate a consensus sequence
that can then be functionally and phylogenetically evaluated. |
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