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Chromosome ends in Chironomus pallidivittatus contain different subfamilies of telomere-associated repeats

Cohn, Marita LU and Edström, Jan-Erik LU (1992) In Chromosoma 101(10). p.634-640
Abstract
Tandemly repeated 340 bp sequences, TA repeats, are present in seven of the eight pairs of chromosome ends in Chironomus pallidivittatus, being absent from the telocentric left end of chromosome four. We have previously shown that the family of TA repeats consists of four main subfamilies. One subfamily is composed of a master unit and the other three contain derived units, each of which has a small region where the master sequence is highly mutated. Here we find that there are considerable variations in numbers of TA repeats between animals and for the same telomere in different animals. We also show that the seven telomere pairs containing TA repeats differ with regard to the content of derived subfamilies. The master unit is probably... (More)
Tandemly repeated 340 bp sequences, TA repeats, are present in seven of the eight pairs of chromosome ends in Chironomus pallidivittatus, being absent from the telocentric left end of chromosome four. We have previously shown that the family of TA repeats consists of four main subfamilies. One subfamily is composed of a master unit and the other three contain derived units, each of which has a small region where the master sequence is highly mutated. Here we find that there are considerable variations in numbers of TA repeats between animals and for the same telomere in different animals. We also show that the seven telomere pairs containing TA repeats differ with regard to the content of derived subfamilies. The master unit is probably present in all seven pairs. Two of the derived units are exclusively present in two telomere pairs. The third derived unit shows a more irregular distribution. Some of the telomeres have highly variable contents of such units among animals. Subfamilies thus have different behaviour as reflected in their stable and variable patterns of distribution between individual telomeres. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Chromosoma
volume
101
issue
10
pages
634 - 640
publisher
Springer
external identifiers
  • scopus:0026665105
ISSN
0009-5915
DOI
10.1007/BF00360541
language
English
LU publication?
yes
id
118c6544-e9e5-4f86-91d2-1027bc100e32 (old id 4742856)
date added to LUP
2014-11-06 11:35:43
date last changed
2017-01-01 07:04:24
@article{118c6544-e9e5-4f86-91d2-1027bc100e32,
  abstract     = {Tandemly repeated 340 bp sequences, TA repeats, are present in seven of the eight pairs of chromosome ends in Chironomus pallidivittatus, being absent from the telocentric left end of chromosome four. We have previously shown that the family of TA repeats consists of four main subfamilies. One subfamily is composed of a master unit and the other three contain derived units, each of which has a small region where the master sequence is highly mutated. Here we find that there are considerable variations in numbers of TA repeats between animals and for the same telomere in different animals. We also show that the seven telomere pairs containing TA repeats differ with regard to the content of derived subfamilies. The master unit is probably present in all seven pairs. Two of the derived units are exclusively present in two telomere pairs. The third derived unit shows a more irregular distribution. Some of the telomeres have highly variable contents of such units among animals. Subfamilies thus have different behaviour as reflected in their stable and variable patterns of distribution between individual telomeres.},
  author       = {Cohn, Marita and Edström, Jan-Erik},
  issn         = {0009-5915},
  language     = {eng},
  number       = {10},
  pages        = {634--640},
  publisher    = {Springer},
  series       = {Chromosoma},
  title        = {Chromosome ends in Chironomus pallidivittatus contain different subfamilies of telomere-associated repeats},
  url          = {http://dx.doi.org/10.1007/BF00360541},
  volume       = {101},
  year         = {1992},
}