A novel yeast cell-based screen identifies flavone as a tankyrase inhibitor

Yoko Yashiroda, Reika Okamoto, Kaori Hatsugai, Yasushi Takemoto, Naoki Goshima, Tamio Saito, Makiko Hamamoto, Yoshikazu Sugimoto, Hiroyuki Osada, Hiroyuki Seimiya, Minoru Yoshida

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


The telomere-associated protein tankyrase 1 is a poly(ADP-ribose) polymerase and is considered to be a promising target for cancer therapy, especially for BRCA-associated cancers. However, an efficient assay system for inhibitor screening has not been established, mainly due to the difficulty of efficient preparation of the enzyme and its substrate. Here, we report a cell-based assay system for detecting inhibitory activity against tankyrase 1. We found that overexpression of the human tankyrase 1 gene causes a growth defect in the fission yeast Schizosaccharomyces pombe. Chemicals that restore the growth defect phenotype can be identified as potential tankyrase 1 inhibitors. We performed a high-throughput screen using this system, and identified flavone as a compound that restores the growth of yeast cells overexpressing tankyrase 1. Indeed, flavone inhibited poly(ADP-ribosyl)ation of proteins caused by overexpression of tankyrase 1 in yeast cells. This system allows rapid identification of inhibitory activity against tankyrase 1 and is amenable to high-throughput screening using robotics.

Original languageEnglish
Pages (from-to)569-573
Number of pages5
JournalBiochemical and Biophysical Research Communications
Issue number3
Publication statusPublished - 2010 Apr 9


  • High-throughput screening
  • Inhibitor
  • Schizosaccharomyces pombe
  • Tankyrase 1

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology


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