Establishment of Centromeric Chromatin by the CENP-A Assembly Factor CAL1 Requires FACT-Mediated Transcription.

Establishment of Centromeric Chromatin by the CENP-A Assembly Factor CAL1 Requires FACT-Mediated Transcription.
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DOI:
10.1016/j.devcel.2015.05.012
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发表时间:
2015-07-06
期刊:
影响因子:
11.8
通讯作者:
Mellone, Barbara G.
Mellone, Barbara G.
中科院分区:
生物学1区
文献类型:
--
作者:
Chen, Chin-Chi;Bowers, Sarion;Lipinszki, Zoltan;Palladino, Jason;Trusiak, Sarah;Bettini, Emily;Rosin, Leah;Przewloka, Marcin R.;Glover, David M.;O'Neill, Rachel J.;Mellone, Barbara G.

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Centromeres are essential chromosomal structures that mediate accurate chromosome segregation during cell division. Centromeres are specified epigenetically by the heritable incorporation of the centromeric histone H3 variant, CENP-A. While many of the primary factors that mediate centromeric deposition of CENP-A are known, the chromatin and DNA requirements in this process have remained elusive. Here, we uncover a role for transcription in Drosophila CENP-A deposition. Using an inducible ectopic centromere system that uncouples CENP-A deposition from endogenous centromere function and cell-cycle progression, we demonstrate that CENP-A assembly by its loading factor, CAL1, requires RNAPII-mediated transcription of the underlying DNA. This transcription depends on the novel CAL1 binding partner FACT, but not on CENP-A incorporation. Our work establishes RNAPII passage as a key step in chaperone-mediated CENP-A chromatin establishment and propagation.
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