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| Bacci Jr.,Maurício; Soares,Rafael B.S.; Tajara,Eloíza; Ambar,Guilherme; Fischer,Carlos N.; Guilherme,Ivan R.; Costa,Eduardo P.; Miranda,Vitor F.O.. |
| Transposable elements (TE) are major components of eukaryotic genomes and involved in cell regulation and organism evolution. We have analyzed 123,889 expressed sequence tags of the Eucalyptus Genome Project database and found 124 sequences representing 76 TE in 9 groups, of which copia, MuDR and FAR1 groups were the most abundant. The low amount of sequences of TE may reflect the high efficiency of repression of these elements, a process that is called TE silencing. Frequency of groups of TE in Eucalyptus libraries which were prepared with different tissues or physiologic conditions from seedlings or adult plants indicated that developing plants experience the expression of a much wider spectrum of TE groups than that seen in adult plants. These are... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Eucalyptus; Transposable element. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000400019 |
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| Sperb,Fernanda; Schuck,Desirée Cigaran; Rodrigues,Jaqueline Josi Samá. |
| Transposable elements are DNA sequences present in all the large phylogenetic groups, both capable of changing position within the genome and constituting a significant part of eukaryotic genomes. The mariner family of transposons is one of the few which occurs in a wide variety of taxonomic groups, including freshwater planarians. Nevertheless, so far only five planarian species have been reported to carry mariner-like elements (MLEs), although several different species have been investigated. Regarding the number of copies of MLEs, Girardia tigrina is the only planarian species in which this has been evaluated, with an estimation of 8,000 copies of the element per haploid genome. Preliminary results obtained in our laboratory demonstrated that MLE is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mariner; Planarian; Transposable element; Transposons. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000400012 |
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| Lerat, Emmanuelle; Casacuberta, Josep; Chaparro, Cristian; Vieira, Cristina. |
| Eukaryotic genomes comprise a large proportion of repeated sequences, an important fraction of which are transposable elements (TEs). TEs are mobile elements that have a significant impact on genome evolution and on gene functioning. Although some TE insertions could provide adaptive advantages to species, transposition is a highly mutagenic event that has to be tightly controlled to ensure its viability. Genomes have evolved sophisticated mechanisms to control TE activity, the most important being epigenetic silencing. However, the epigenetic control of TEs can also affect genes located nearby that can become epigenetically regulated. It has been proposed that the combination of TE mobilization and the induced changes in the epigenetic landscape could... |
| Tipo: Text |
Palavras-chave: Transposable element; Epigenomics; Bioinformatic tools. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00487/59900/63082.pdf |
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