Pattern of chromosomal localization of the Hoppel transposable element family in the Drosophila melanogaster subgroup

• Tipo: Artigo em Revista Científica Internacional
• Data: 1998

Autores

Coelho, PA (Autor) Outra; Queiroz Machado, J (Autor) Outra; Hartl, D (Autor) Outra; Sunkel, CE (Autor) ICBAS

Revista

Título: Chromosome Research

Vol. 6

Páginas: 385-395

ISSN: 0967-3849

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 8 Citações

Scopus - 9 Citações

Outras Informações

ID Authenticus: P-001-7B9

DOI: 10.1023/a:1009277322626

Abstract (EN): We have isolated a Hoppel-like transposon from heterochromatin of the second chromosome of Drosophila melanogaster and used a conserved DNA sequence between the different elements of this family to determine their distribution in both mitotic and polytene chromosomes. The hybridization pattern of polytene chromosomes extends throughout the entire chromocentre, as well as a substantial portion of the fourth chromosome. Analysis of different wild-type strains of D. melanogaster shows variation in euchromatic insertion sites, although most insertions are found near the chromocentre. The positions and the number of heterochromatic clusters of Hoppel on mitotic chromosomes are conserved among the several strains analysed. Accurate mapping of this element was achieved by in situ hybridization on D. melanogaster mitotic chromosomes that had previously been banded with Hoechst 33258. To evaluate the evolutionary stability of this pattern, different species were analysed: by in situ hybridization and Southern blotting. We conclude that Hoppel has a conserved distribution in mitotic heterochromatin within the D. melanogaster subgroup, established around 5 million years ago. The overall conservation of heterochormatic organization supports the notion that heterochormatin does perform important structural and functional roles.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11