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• W2217532849 abstract "Research Article1 February 1992free access In vivo topoisomerase II cleavage of the Drosophila histone and satellite III repeats: DNA sequence and structural characteristics. E. Käs E. Käs Department of Biochemistry, University of Geneva, Switzerland. Search for more papers by this author U.K. Laemmli U.K. Laemmli Department of Biochemistry, University of Geneva, Switzerland. Search for more papers by this author E. Käs E. Käs Department of Biochemistry, University of Geneva, Switzerland. Search for more papers by this author U.K. Laemmli U.K. Laemmli Department of Biochemistry, University of Geneva, Switzerland. Search for more papers by this author Author Information E. Käs1 and U.K. Laemmli1 1Department of Biochemistry, University of Geneva, Switzerland. The EMBO Journal (1992)11:705-716https://doi.org/10.1002/j.1460-2075.1992.tb05103.x PDFDownload PDF of article text and main figures. ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InMendeleyWechatReddit Figures & Info We have identified two classes of in vivo topoisomerase II cleavage sites in the Drosophila histone gene repeat. One class co-localizes with DNase I-hypersensitive regions and another novel class maps to a subset of consecutive nucleosome linker sites in the scaffold-associated region (SAR) of the histone gene loop. Prominent topoisomerase II cleavage is also observed in one of the linker regions of the two nucleosomes spanning satellite III, a centromeric SAR-like DNA sequence with a repeat length of 359 bp. At the sequence level, in vivo topoisomerase II cleavage is highly site specific. Comparison of 10 nucleosome linker sites defines an in vivo cleavage sequence whose major characteristic is a prominent GC-rich core. These GC-rich cleavage sites are flanked by extensive arrays of oligo(dA).oligo(dT) tracts characteristic of SAR sequences. Treatment of cells with distamycin selectively enhances cleavage at nucleosome linker sites of the SAR and satellite regions, suggesting that AT-rich sequences flanking cleavage sites may be involved in determining topoisomerase II activity in the cell. These observations provide evidence for the association of topoisomerase II with SARS in vivo. Previous ArticleNext Article Volume 11Issue 21 February 1992In this issue RelatedDetailsLoading ..." @default.
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• W2217532849 date "1992-02-01" @default.
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• W2217532849 title "In vivo topoisomerase II cleavage of the Drosophila histone and satellite III repeats: DNA sequence and structural characteristics." @default.
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• W2217532849 doi "https://doi.org/10.1002/j.1460-2075.1992.tb05103.x" @default.
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