DNA structures common for chironomid telomeres terminating with complex repeats

Tandem repeats, 340 bp long, have been shown to terminate the chromosomes in Chironomus pallidivittatus and similar DNA may be used for this purpose by related insects. In view of the importance of Chironomus in telomere studies, representing in principle a third system after short repeats and Droso...

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Published in:Insect molecular biology 2000-06, Vol.9 (3), p.341-347
Main Authors: Rosen, M, Edstroem, J
Format: Article
Language:English
Subjects:
Animals
Base Sequence
centromere
Chironomidae
Chironomidae - genetics
Chironomus
Chironomus dilutus
Chironomus pallidivittatus
DNA - chemistry
Freshwater
Genes, Insect
In Situ Hybridization - methods
Molecular Sequence Data
Mutation
Nucleic Acid Conformation
palindrome
sequence evolution
Sequence Homology, Nucleic Acid
Species Specificity
subtelomere
Tandem Repeat Sequences
Telomere
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description Tandem repeats, 340 bp long, have been shown to terminate the chromosomes in Chironomus pallidivittatus and similar DNA may be used for this purpose by related insects. In view of the importance of Chironomus in telomere studies, representing in principle a third system after short repeats and Drosophila telomeric retrotransposons, we have investigated the related Chironomus dilutus, to learn what DNA structures are conserved at the chromosome ends. Interspersed subrepeats in the telomeric repeats, which contain a long palindrome, and a zone of about 100 bp of relatively constant subtelomeric DNA towards the junction to the telomeric DNA, are characteristic for C. dilutus as for previously investigated species. C. dilutus has similar subtelomeric DNA at all chromosome ends, but typical telomeric repeats in only seven of the pairs since the eighth telocentric pair contains centromere‐specific repeats.
doi_str_mv 10.1046/j.1365-2583.2000.00193.x
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source Wiley
subjects Animals
Base Sequence
centromere
Chironomidae
Chironomidae - genetics
Chironomus
Chironomus dilutus
Chironomus pallidivittatus
DNA - chemistry
Freshwater
Genes, Insect
In Situ Hybridization - methods
Molecular Sequence Data
Mutation
Nucleic Acid Conformation
palindrome
sequence evolution
Sequence Homology, Nucleic Acid
Species Specificity
subtelomere
Tandem Repeat Sequences
Telomere
title DNA structures common for chironomid telomeres terminating with complex repeats
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