Association of eukaryotic DNA topoisomerase I with nucleosomes and chromosomal proteins

Kashayar Javaherian, Leroy-Fong Liu

研究成果: 雜誌貢獻文章同行評審

51 引文 斯高帕斯(Scopus)


A DNA topoisomerase activity is found to be associated with the nucleosomes released by the Staphylococcal nuclease digestion of HeLa nuclei. Such an association is found to be salt dependent. A number of criteria have established that this DNA topoisomerase activity is due to HeLa topo I(Liu,L. F. and Miller, K. G. (1980) Proc. Natl. Acad. Sci. USA 78, 3489-3491). A similar association has been demonstrated from the in vitro studies using purified mononucleosomes and eukaryotic DNA topoisomerase 1. Nonhistone HMG proteins and histone H1 are found to stimulate topoisomerase activity in vitro and form tight complexes with eukaryotic DNA topoisomerase I. The intimate interactions of topoisomerase I with chromosomal proteins and nucleosomes may be an essential feature of the topoisomerase function in vivo.

頁(從 - 到)461-472
期刊Nucleic Acids Research
出版狀態已發佈 - 1月 25 1983

ASJC Scopus subject areas

  • 統計、概率和不確定性
  • 應用數學
  • 健康、毒理學和誘變
  • 毒理學
  • 遺傳學(臨床)
  • 遺傳學


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