Dispersion of transposable elements and multigene families: Microstructural variation in Characidium (Characiformes: Crenuchidae) genomes
Título del documento: Dispersion of transposable elements and multigene families: Microstructural variation in Characidium (Characiformes: Crenuchidae) genomes
Revista: Genetics and molecular biology
Base de datos: PERIÓDICA
Número de sistema: 000420015
ISSN: 1415-4757
Autores: 1
2
1
2
Instituciones: 1Universidade Federal de Sao Carlos, Departamento de Genetica e Evolucao, Sao Carlos, Sao Paulo. Brasil
2Universidade Estadual de Ponta Grossa, Departamento de Biologia Estrutural, Molecular e Genetica, Ponta Grossa, Parana. Brasil
Año:
Periodo: Sep
Volumen: 41
Número: 3
Paginación: 585-592
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico, descriptivo
Resumen en inglés Eukaryotic genomes consist of several repetitive DNAs, including dispersed DNA sequences that move between chromosome sites, tandem repeats of DNA sequences, and multigene families. In this study, repeated sequences isolated from the genome of Characidium gomesi were analyzed and mapped to chromosomes in Characidium ze - bra and specimens from two populations of C. gomesi . The sequences were transposable elements (TEs) named retroelement of Xiphophorus ( Rex ); multigene families of U2 small nuclear RNA ( U2 snRNA ); and histones H1, H3, and H4. Sequence analyses revealed that U2 snRNA contains a major portion corresponding to the Tx1-type non-LTR retrotransposon Keno , the preferential insertion sites of which are U2 snRNA sequences. All histone se - quences were found to be associated with TEs. In situ localization revealed that these DNA sequences are dispersed throughout the autosomes of the species, but they are not involved in differentiation of the specific region of the W sex chromosome in C. gomesi . We discuss mechanisms of TE invasion into multigene families that lead to microstructural variation in Characidium genomes
Disciplinas: Química,
Biología
Palabras clave: Bioquímica,
Biología celular,
Genética,
ADN móvil,
Histonas,
Evolución del cariotipo,
snRNA,
WZ/ZZ
Keyword: Biochemistry,
Cell biology,
Genetics,
Mobile DNA,
Histones,
karyotype evolution,
snRNA,
WZ/ZZ
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