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*

*この研究の対応する著者

研究成果: Article査読

50 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English
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Published - 2014 2

ASJC Scopus subject areas

  • 遺伝学

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