title: The topopyrones poison human DNA topoisomerases I and II.
abstract: The topopyrones are fungal natural products shown previously to act as poisons of human DNA topoisomerase I. Recent total syntheses of the four known naturally occurring members of this class of compounds have enabled more detailed biochemical characterization. Presently it is shown that in addition to topoisomerase I, topopyrones A-D also act as poisons of human DNA topoisomerase II. The topopyrones thus represent a rare example of molecules capable of interacting effectively with more than one DNA topoisomerase.
authors.affiliation: Center for BioEnergetics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, USA.
authors.forename: Qasim A
authors.initials: QA
authors.lastname: Khan
authors.forename: Mark A
authors.initials: MA
authors.lastname: Elban
authors.forename: Sidney M
authors.initials: SM
authors.lastname: Hecht
mesh_terms: D000880:Anthraquinones / Q000737:chemistry / Q000494:pharmacology*; D000951:Antigens, Neoplasm / Q000378:metabolism; D001483:Base Sequence; D004247:DNA / Q000378:metabolism; D004264:DNA Topoisomerases, Type I / Q000378:metabolism; D004250:DNA Topoisomerases, Type II / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000037:antagonists & inhibitors* / Q000378:metabolism; D004791:Enzyme Inhibitors / Q000737:chemistry / Q000494:pharmacology*; D006801:Humans; D011753:Pyrones / Q000737:chemistry / Q000494:pharmacology*; D059004:Topoisomerase I Inhibitors; D059005:Topoisomerase II Inhibitors
chemical_list: D000880:Anthraquinones; D000951:Antigens, Neoplasm; D004268:DNA-Binding Proteins; D004791:Enzyme Inhibitors; D011753:Pyrones; D059004:Topoisomerase I Inhibitors; D059005:Topoisomerase II Inhibitors; D004247:DNA; D004264:DNA Topoisomerases, Type I; D004250:DNA Topoisomerases, Type II