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- W2098985312 abstract "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." @default.
- W2098985312 created "2016-06-24" @default.
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- W2098985312 date "2013-11-14" @default.
- W2098985312 modified "2023-10-16" @default.
- W2098985312 title "The centromeric nucleosome-like CENP–T–W–S–X complex induces positive supercoils into DNA" @default.
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- W2098985312 doi "https://doi.org/10.1093/nar/gkt1124" @default.
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