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

Title
Pattern of chromosomal localization of the Hoppel transposable element family in the Drosophila melanogaster subgroup
Type
Article in International Scientific Journal
Year
1998
Authors
Coelho, PA
(Author)
Other
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Queiroz Machado, J
(Author)
Other
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Hartl, D
(Author)
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Sunkel, CE
(Author)
ICBAS
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Journal
Title: Chromosome ResearchImported from Authenticus Search for Journal Publications
Vol. 6
Pages: 385-395
ISSN: 0967-3849
Publisher: Springer Nature
Other information
Authenticus ID: P-001-7B9
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.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 11
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