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@article{1094898, author = {Bousios, Alexandros and Darzentas, Nikos}, article_location = {London}, article_number = {Mar}, doi = {http://dx.doi.org/10.1186/1759-8753-4-9}, keywords = {sirevirus; transposable elements; LTR retrotransposons ICTV; Phylogenetic analysis; Pseudoviridae; Copia; Plant genomes; Maize}, language = {eng}, issn = {1759-8753}, journal = {Mobile DNA}, title = {Sirevirus LTR retrotransposons: phylogenetic misconceptions in the plant world}, url = {http://www.mobilednajournal.com/content/pdf/1759-8753-4-9.pdf}, volume = {4}, year = {2013} }
TY - JOUR ID - 1094898 AU - Bousios, Alexandros - Darzentas, Nikos PY - 2013 TI - Sirevirus LTR retrotransposons: phylogenetic misconceptions in the plant world JF - Mobile DNA VL - 4 IS - Mar SP - "nestránkováno" EP - "nestránkováno" PB - BioMed Central SN - 17598753 KW - sirevirus KW - transposable elements KW - LTR retrotransposons ICTV KW - Phylogenetic analysis KW - Pseudoviridae KW - Copia KW - Plant genomes KW - Maize UR - http://www.mobilednajournal.com/content/pdf/1759-8753-4-9.pdf L2 - http://www.mobilednajournal.com/content/pdf/1759-8753-4-9.pdf N2 - Sireviruses are an ancient and plant-specific LTR retrotransposon genus. They possess a unique genome structure that is characterized by a plethora of highly conserved sequence motifs in key domains of the non-coding genome, and often, by the presence of an envelope-like gene. Recently, their crucial role in the organization of the maize genome, where Sireviruses occupy approximately 21% of its nuclear content, was revealed, followed by an analysis of their distribution across the plant kingdom. It is now suggested that Sireviruses have been a major mediator of the evolution of many plant genomes. However, the name 'Sirevirus' has caused confusion in the scientific community in regards to their classification within the LTR retrotransposon order and their relationship with viruses - a situation that is not unique to Sireviruses, but also affects other LTR retrotransposon genera. Here, we clarify the phylogenetic position of Sireviruses as typical LTR retrotransposons of the Copia superfamily and explain that the confusion stems from the discrepancy in the categorization of LTR retrotransposons by the two main classification systems: the International Committee on the Taxonomy of Viruses (ICTV) system and the unified classification system for eukaryotic transposable elements. While the name 'Sirevirus' has been given by ICTV, we show that the transposable element system, which is more suitable for eukaryotic genome studies, lacks an appropriate taxonomic level for describing them. We urge for this inconsistency to be addressed. Finally, we provide data suggesting that of the three ICTV-proposed genera of the Pseudoviridae (that is, Copia) family, only Sireviruses form a monophyletic group, while the phylogenetic distinction between Pseudoviruses and Hemiviruses is unclear. We conclude that because of their ongoing important contribution to the classification of transposable elements, these schemes need to be frequently revisited and revised - as shown by the example of the Sirevirus LTR retrotransposon genus. ER -
BOUSIOS, Alexandros a Nikos DARZENTAS. Sirevirus LTR retrotransposons: phylogenetic misconceptions in the plant world. \textit{Mobile DNA}. London: BioMed Central, 2013, roč.~4, Mar, s.~''nestránkováno'', 5 s. ISSN~1759-8753. Dostupné z: https://dx.doi.org/10.1186/1759-8753-4-9.
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