Sequence-directed nucleosome-depletion is sufficient to activate transcription from a yeast core promoter in vivo

Yuichi Ichikawa, Nobuyuki Morohashi, Nobuyuki Tomita, Aaron P. Mitchell, Hitoshi Kurumizaka, Mitsuhiro Shimizu

    研究成果: Article査読

    2 被引用数 (Scopus)

    抄録

    Nucleosome-depleted regions (NDRs) (also called nucleosome-free regions or NFRs) are often found in the promoter regions of many yeast genes, and are formed by multiple mechanisms, including the binding of activators and enhancers, the actions of chromatin remodeling complexes, and the specific DNA sequences themselves. However, it remains unclear whether NDR formation per se is essential for transcriptional activation. Here, we examined the relationship between nucleosome organization and gene expression using a defined yeast reporter system, consisting of the CYC1 minimal core promoter and the lacZ gene. We introduced simple repeated sequences that should be either incorporated in nucleosomes or excluded from nucleosomes in the site upstream of the TATA boxes. The (CTG)12, (GAA)12 and (TGTAGG)6 inserts were incorporated into a positioned nucleosome in the core promoter region, and did not affect the reporter gene expression. In contrast, the insertion of (CGG)12, (TTAGGG)6, (A)34 or (CG)8 induced lacZ expression by 10-20 fold. Nucleosome mapping analyses revealed that the inserts that induced the reporter gene expression prevented nucleosome formation, and created an NDR upstream of the TATA boxes. Thus, our results demonstrated that NDR formation dictated by DNA sequences is sufficient for transcriptional activation from the core promoter in vivo.

    本文言語English
    ページ(範囲)57-62
    ページ数6
    ジャーナルBiochemical and Biophysical Research Communications
    476
    2
    DOI
    出版ステータスPublished - 2016 7 22

    ASJC Scopus subject areas

    • 生化学
    • 生物理学
    • 細胞生物学
    • 分子生物学

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