Phylogenetic distribution of TTAGG telomeric repeats in insects
1.
SYSNO ASEP
0101598
Document Type
J - Journal Article
R&D Document Type
Journal Article
Subsidiary J
Ostatní články
Title
Phylogenetic distribution of TTAGG telomeric repeats in insects
Title
Fylogenetická distribuce opakovaných telomerických sekvencí TTAGG u hmyzu
Author(s)
Frydrychová, Radmila (ENTU-I) Grossmann, P. (CZ) Trubač, P. (CZ) Vítková, Magda (ENTU-I) Marec, František (ENTU-I)
Source Title
Genome. - : Canadian Science Publishing
- ISSN 0831-2796
Roč. 47, - (2004), s. 163-178
Number of pages
16 s.
Language
eng - English
Country
CA - Canada
Keywords
chromosomes ; fluorescence in situ hybridization ; FISH
Subject RIV
EB - Genetics ; Molecular Biology
R&D Projects
KSK5052113 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
GA206/00/0750 GA ČR - Czech Science Foundation (CSF)
CEZ
AV0Z5007907 - ENTU-I, BC-A
Annotation
We examined the presence of TTAGG telomeric repeats in 22 species from 20 insect orders by single-primer PCR with (TTAGG)6 primers, Southern hybridization of genomic DNAs and fluorescence in-situ hybridization (FISH) of chromosomes with (TTAGG)n probes. The (TTAGG)n sequence was present in 15 species and absent in 7 species. The pattern of phylogenetic distribution of the TTAGG repeats clearly supported a hypothesis that the sequence was an ancestral motif of insect telomeres but was lost repeatedly during insect evolution. The repeated losses of TTAGG in different branches of the insect phylogenetic tree suggest a backup mechanism in the genome of insects that enabled them frequent evolutionary changes in telomere composition
Workplace
Institute of Entomology (until 2005)
Contact
Helena Musilová, musilova@entu.cas.cz, Tel.: 387 775 216
Year of Publishing
2005
Number of the records: 1
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