Genomic analysis of Drosophila melanogaster telomeres: full-length copies of HeT-A and TART elements at telomeres

Mol Biol Evol. 2004 Sep;21(9):1613-9. doi: 10.1093/molbev/msh174. Epub 2004 May 26.

Abstract

The repetitive nature of heterochromatin hampers its analysis in general genome-sequencing projects. Specific studies are needed to extend the sequence into telomeric and centromeric heterochromatin. Drosophila telomeres lack the telomerase-generated repeats that are characteristic of other eukaryotic chromosomes. Instead, they consist of tandem arrays of HeT-A and TART elements. Herein, we present the genomic organization of the telomeres in the isogenic strain (y; cn bw sp) that was used for the Drosophila melanogaster sequencing project. The data indicate that the canonical features of telomere organization are widely conserved in evolution. In addition, we have identified full-length elements, likely competent elements, for HeT-A and TART.

Publication types

  • Letter
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • Chromosomes, Artificial, Bacterial / genetics
  • Drosophila Proteins / genetics*
  • Drosophila melanogaster / genetics*
  • Evolution, Molecular
  • Gene Products, gag / genetics*
  • Genes, Insect
  • Genome
  • Heterochromatin / genetics
  • Models, Genetic
  • Molecular Sequence Data
  • Retroelements / genetics
  • Sequence Homology, Amino Acid
  • Sequence Homology, Nucleic Acid
  • Telomere / genetics

Substances

  • Drosophila Proteins
  • Gene Products, gag
  • HeT-A-gag protein, Drosophila
  • Heterochromatin
  • Retroelements
  • TART-element-gag protein, Drosophila

Associated data

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