Eudistomin C, an Antitumor and Antiviral Natural Product, Targets 40S Ribosome and Inhibits Protein Translation

Yu Ota, Takumi Chinen, Keisuke Yoshida, Shun Kudo, Yoko Nagumo, Yuh Shiwa, Ryosuke Yamada, Hirotatsu Umihara, Kotaro Iwasaki, Hiroshi Masumoto, Satoshi Yokoshima, Hirofumi Yoshikawa, Tohru Fukuyama, Junichi Kobayashi, Takeo Usui

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)

    Abstract

    Eudistomin C (EudiC), a natural product, shows potent antitumor and antiviral activities, but the target molecule and the mechanism of action remain to be revealed. Here, we show that the 40S ribosome is the target in EudiC cytotoxicity. We isolated EudiC-resistant mutants from a multidrug-sensitive yeast strain, and a genetic analysis classified these YER (yeast EudiC resistance) mutants into three complementation groups. A genome-wide study revealed that the YER1-6 mutation is in the uS11 gene (RPS14A). Biotinylated EudiC pulled down Rps14p-containing complexes from 40S and 80S ribosomes, but not from the 60S ribosome. EudiC strongly inhibited translation of the wild-type strain but not of YER1-6 in cells and in vitro. These results indicate that EudiC is a protein synthesis inhibitor targeting the uS11-containing ribosomal subunit, and shows cytotoxicity by inhibiting protein translation.

    Original languageEnglish
    Pages (from-to)1616-1620
    Number of pages5
    JournalChemBioChem
    DOIs
    Publication statusPublished - 2016 Sep 2

    Keywords

    • eudistomin C
    • multidrug sensitive strain
    • protein translation
    • uS11
    • yeast genetics

    ASJC Scopus subject areas

    • Biochemistry
    • Molecular Medicine
    • Molecular Biology
    • Organic Chemistry

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