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In vitro low propensity to form nucleosomes of four telomeric sequences.

Cacchione, S; Cerone, MA; Savino, M; (1997) In vitro low propensity to form nucleosomes of four telomeric sequences. FEBS Lett , 400 (1) pp. 37-41.

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Abstract

The structural aspects of nucleosome assembly on telomeres are largely unknown. We analyzed by competitive reconstitution the affinities for the histone octamer of telomeric sequences from four different eukaryotic groups, Arabidopsis thaliana, mammals, Tetrahymena, and Saccharomyces cerevisiae. All telomeres reconstitute in nucleosomes with lower association constants than average nucleosomal DNA. DNase I digestion analysis suggests a multiple translational positioning and the lack of rotational positioning, probably due to telomeric repeats length (in most cases 6-8 bp), out of phase with the DNA helical repeat on the nucleosome (10.2 bp). These results could partly explain the lack of nucleosomes on lower eukaryote telomeres, and suggest a high in vivo mobility of telomeric nucleosomes.

Type: Article
Title: In vitro low propensity to form nucleosomes of four telomeric sequences.
Location: England
Keywords: Animals, Arabidopsis, Binding, Competitive, Chickens, DNA, Deoxyribonuclease I, Histones, Micrococcal Nuclease, Nucleosomes, Saccharomyces cerevisiae, Telomere, Tetrahymena
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Cancer Institute
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Cancer Institute > Research Department of Oncology
URI: http://discovery.ucl.ac.uk/id/eprint/1345536
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