title: Transposable element 'roo' attaches to nuclear matrix of the Drosophila melanogaster.
abstract: The genome of eukaryotes is organized into structural units of chromatin loops. This higher order organization is supported by a nuclear skeleton called the nuclear matrix. The genomic DNA associated with the nuclear matrix is called the matrix associated region (MAR). Only a few genome-wide screens have been attempted, although many studies have characterized locusspecific MAR DNA sequences. In this study, a MAR DNA library was prepared from the Drosophila melanogaster Meigen (Diptera: Drosophilidae) genome. One of the sequences identified as a MAR was from a long terminal repeat region of 'roo' retrotransposon (roo MAR). Sequence analysis of roo MAR showed its distribution across the D. melanogaster genome. roo MAR also showed high sequence similarity with a previously identified MAR in Drosophila, namely the 'gypsy' retrotransposon. Analysis of the genes flanking roo MAR insertions in the Drosophila genome showed that genes were co-ordinately expressed. The results from the present study in D. melanogaster suggest this sequence plays an important role in genome organization and function. The findings point to an evolutionary role of retrotransposons in shaping the genomic architecture of eukaryotes.
authors.affiliation: 1 Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad-500 007, India.
authors.forename: Anitha
authors.initials: A
authors.lastname: Mamillapalli
authors.forename: Rashmi U
authors.initials: RU
authors.lastname: Pathak
authors.forename: Hita S
authors.initials: HS
authors.lastname: Garapati
authors.forename: Rakesh K
authors.initials: RK
authors.lastname: Mishra
mesh_terms: D000818:Animals; D001483:Base Sequence; D004331:Drosophila melanogaster / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D004625:Embryo, Nonmammalian / Q000196:embryology / Q000378:metabolism; D005260:Female; D005786:Gene Expression Regulation; D015723:Gene Library; D008297:Male; D015530:Nuclear Matrix / Q000235:genetics* / Q000378:metabolism; D016133:Polymerase Chain Reaction; D018626:Retroelements; D016415:Sequence Alignment; D020079:Terminal Repeat Sequences
chemical_list: D018626:Retroelements
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