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Corpus Systématique Animale

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Variable numbers of simple tandem repeats make birds of the order Ciconiiformes heteroplasmic in their mitochondrial genomes

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Springer (journals)
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Mots-clés d'auteur
  • Birds
  • Ciconiiformes
  • Mitochondrial DNA Control region
  • Heteroplasmy
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  • Thomas Berg 1
  • Truls Moum 1
  • Steinar Johansen 1
  • 1) Department of Cell Biology, Institute of Medical Biology, University of Tromsø, N-9037, Tromsø, Norway

We have analyzed a variable domain of the mitochondrial DNA control region of 18 avian species. intra-individual length variation was identified and characterized in 15 species. The occurrence of heteroplasmy among species is phylogenetically consistent with a current classification of birds. Polymerase chain reaction amplifications, direct sequencing, and Southern analysis of mitochondrial DNA showed that the heteroplasmy is due to variable numbers of direct repeats in a tandem organization, located in the control region close to the tRNAPhe gene. The tandem repeats consist of short sequence motifs that vary in size from 4 to 32 base pairs between species. Sequence complexity of the repeat motifs was low, with almost exclusively Ts and Gs in the heavy-strand. Extensive variation in the copy number of the repeats was seen both intra-specifically and within individuals. This is the first report of mitochondrial heteroplasmy characterized at the sequence level in birds.

Catégories Science-Metrix
  • 1 - health sciences
  • 2 - biomedical research
  • 3 - microbiology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - psychologie. psychophysiologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Biochemistry, Genetics and Molecular Biology ; 3 - Genetics
  • 1 - Health Sciences ; 2 - Medicine ; 3 - General Medicine
Catégories WoS
  • 1 - science ; 2 - genetics & heredity
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Current Genetics

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