Recurrent gains and losses of large (84-109 bp) repeats in the rDNA internal transcribed spacer 2 (ITS2) of rhipicephaline ticks

Murrell, A., Campbell, N. J. H. and Barker, S. C. (2001) Recurrent gains and losses of large (84-109 bp) repeats in the rDNA internal transcribed spacer 2 (ITS2) of rhipicephaline ticks. Insect Molecular Biology, 10 6: 587-596. doi:10.1046/j.0962-1075.2001.00298.x


Author Murrell, A.
Campbell, N. J. H.
Barker, S. C.
Title Recurrent gains and losses of large (84-109 bp) repeats in the rDNA internal transcribed spacer 2 (ITS2) of rhipicephaline ticks
Journal name Insect Molecular Biology   Check publisher's open access policy
ISSN 0962-1075
Publication date 2001-01-01
Sub-type Article (original research)
DOI 10.1046/j.0962-1075.2001.00298.x
Open Access Status Not yet assessed
Volume 10
Issue 6
Start page 587
End page 596
Total pages 10
Place of publication UK
Publisher Blackwell
Language eng
Subject C1
270208 Molecular Evolution
780105 Biological sciences
Abstract We studied the internal transcribed spacer 2 (ITS2) in twenty-two spp. of ticks from the subfamily Rhipicephalinae. A 104-109 base pair (bp) region was Imperfectly repeated In most ticks studied. Mapping the number of repeat copies on to a phylogeny from the ITS2 showed that there have been many Independent gains and losses of repeats. Comparison of the sequences of the repeat copies Indicated that in most taxa concerted evolution had played little if any role in the evolution of these regions, as the copies clustered by sequence position rather than species, In our putative secondary structure, each repeat copy can fold into a distinct and almost identical stem-loop complex; a gain or loss of a repeat copy apparently does not impair the function of the ITS2 in these ticks.
Keyword Biochemistry & Molecular Biology
Entomology
Tick
Repeat
Phylogeny
Its2 Evolution
Secondary Structure
Ribosomal Dna
Phylogenetic-relationships
Repetitive Sequences
Ixodidae
Acari
Evolution
Nuclear
Region
Gene
Limits
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: Institute for Molecular Bioscience - Publications
 
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Created: Wed, 15 Aug 2007, 02:09:37 EST