Actinomycin D induced DNAse I cleavage enhancement caused by sequence specific propagation of an altered DNA structure

Yao Qi Huang, Robert P. Rehfuss, Steven R. Laplante, Ellis Boudreau, Philip N. Borer, Michael J. Lane

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

Two DNA hexadecamers containing one central 5′-GC-3′ base step have been examined by footprinting methodology in the presence and absence of actinomycin D. The results of these studies, coupled with imino proton NMR measurements indicate that the antitumor drug causes a change in DNA conformation at a distance from the actinomycin intercalation site in a molecule of sequence d[ATATATAGCTATATAT] that does not occur in d[AAAAAAAGCTTTTTTT] The experiments demonstrate that DNase I rate enhancements associated with actinomycin D binding are caused by ligand alteration of equilibrium DNA structure.

Original languageEnglish (US)
Pages (from-to)11125-11139
Number of pages15
JournalNucleic acids research
Volume16
Issue number23
DOIs
StatePublished - Dec 9 1988

ASJC Scopus subject areas

  • Genetics

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