The centromeric nucleosome-like CENP-T-W-S-X complex induces positive supercoils into DNA

Kozo Takeuchi, Tatsuya Nishino, Kouta Mayanagi, Naoki Horikoshi, Akihisa Osakabe, Hiroaki Tachiwana, Tetsuya Hori, Hitoshi Kurumizaka, Tatsuo Fukagawa

    研究成果: ジャーナルへの寄稿学術誌査読

    54 被引用数 (Scopus)

    抄録

    The centromere is a specific genomic region upon which the kinetochore is formed to attach to spindle microtubules for faithful chromosome segregation. To distinguish this chromosomal region from other genomic loci, the centromere contains a specific chromatin structure including specialized nucleosomes containing the histone H3 variant CENP-A. In addition to CENP-A nucleosomes, we have found that centromeres contain a nucleosome-like structure comprised of the histone-fold CENP-T-W-S-X complex. However, it is unclear how the CENP-T-W-S-X complex associates with centromere chromatin. Here, we demonstrate that the CENP-T-W-S-X complex binds preferentially to ∼100 bp of linker DNA rather than nucleosome-bound DNA. In addition, we find that the CENP-T-W-S-X complex primarily binds to DNA as a (CENP-T-W-S-X)2 structure. Interestingly, in contrast to canonical nucleosomes that negatively supercoil DNA, the CENP-T-W-S-X complex induces positive DNA supercoils. We found that the DNA-binding regions in CENP-T or CENP-W, but not CENP-S or CENP-X, are required for this positive supercoiling activity and the kinetochore targeting of the CENP-T-W-S-X complex. In summary, our work reveals the structural features and properties of the CENP-T-W-S-X complex for its localization to centromeres.

    本文言語英語
    ページ(範囲)1644-1655
    ページ数12
    ジャーナルNucleic acids research
    42
    3
    DOI
    出版ステータス出版済み - 2月 2014

    !!!All Science Journal Classification (ASJC) codes

    • 遺伝学

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