Consulta: subjectFacets:"Transposable element"
Registros recuperados: 6
Data/hora: 06/06/2024 14:53:51

Occurrence and abundance of a mariner-like element in freshwater and terrestrial planarians (Platyhelminthes, Tricladida) from southern Brazil
Provedor de dados: 74
Autores: 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

Methods for detection of horizontal transfer of transposable elements in complete genomes
Provedor de dados: 74
Autores: Carvalho,Marcos Oliveira de; Loreto,Elgion L.S.
Recent advances in nucleic acid sequencing technology are creating a diverse landscape for the analysis of horizontal transfer in complete genomes. Previously limited to prokaryotes, the availability of complete genomes from close eukaryotic species presents an opportunity to validate hypotheses about the patterns of evolution and mechanisms that drive horizontal transfer. Many of those methods can be transported from methods previously used in prokaryotic genomes, as the assumptions for horizontal transfer can be interpreted as the same. Some methods, however, require a complete adaptation, while others need refinements in sensitivity and specificity to deal with the huge datasets generated from next-generation sequencing technologies. Here we list the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Transposable element; Horizontal transfer; Genome; Computational analysis; Evolution.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000600024

Identification and frequency of transposable elements in Eucalyptus
Provedor de dados: 74
Autores: 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

Transposable elements P and gypsy in natural populations of Drosophila willistoni
Provedor de dados: 74
Autores: Sassi,Adriana Koslovski; Herédia,Fabiana; Loreto,Élgion Lucio da Silva; Valente,Vera Lucia da Silva; Rohde,Claudia.
The presence and integrity of the P transposon and the gypsy retrotransposon in the genome of 18 samples of natural Drosophila willistoni populations collected from a large area of South America were Southern blot screened using Drosophila melanogaster probes. The aim of this screening was provide further knowledge-base on the geographical distribution of D. willistoni and to carry out an inter-population analysis of the P and gypsy elements present in the genomes of the populations analyzed. The fragment patterns obtained indicate that both the P and gypsy elements are ancient in the D. willistoni genome, but whereas the gypsy retroelement appears to be invariable and stable the P element varies between populations and appears to still have some capacity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Drosophila willistoni; Transposable element; P; Gypsy.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000500013

Distribution of the Bari-I transposable element in stable hybrid strains between Drosophila melanogaster and Drosophila simulans and in Brazilian populations of these species
Provedor de dados: 74
Autores: Lucca Jr.,Marcos de; Carareto,Claudia Marcia Aparecida; Ceron,Carlos Roberto.
We analyzed the distribution of the Bari-I transposable element in Drosophila melanogaster (IN(1)AB), its sibling species Drosophila simulans (C167.4) and in eight hybrid strains derived from initial crosses involving D. simulans females and D. melanogaster males of the above cited strains as well as in Brazilian populations of these species. Polymerase chain reaction (PCR) data showed the presence of the Bari-I element among species populations and hybrid strains. Hybridization with a 703 bp probe homologous to the Bari-I sequence showed that the number of Bari-I copies in D. melanogaster IN(1)AB was higher than in D. simulans C167.4 strains. Hybrid strains presented Bari-I sequences related to both parental species. In addition some strains displayed a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bari-I; Drosophila melanogaster; D. simulans; Introgressive hybridization; Transposable element.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000400028

On the Importance to Acknowledge Transposable Elements in Epigenomic Analyses
Provedor de dados: 5
Autores: 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