The FACT complex interacts with the E3 ubiquitin ligase Psh1 to prevent ectopic localization of CENP-A.
The FACT complex interacts with the E3 ubiquitin ligase Psh1 to prevent ectopic localization of CENP-A.
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DOI:
10.1101/gad.243113.114
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发表时间:
2014-08-15
影响因子:
10.5
通讯作者:
Biggins S
中科院分区:
文献类型:
--
作者:
Deyter GM;Biggins S
Centromere identity and its epigenetic maintenance require the incorporation of the histone H3 variant CENP-A at centromeres. CENP-A mislocalization may disrupt chromatin-based processes and chromosome segregation. Here, Deyter and Biggins identify a role for the conserved chromatin-modifying complex FACT in preventing CENP-ACse4 mislocalization to euchromatin by mediating its proteolysis. The budding yeast Spt16 subunit of the FACT complex binds to Psh1, an E3 ubiquitin ligase that targets CENP-ACse4 for degradation. A Psh1 mutant that cannot associate with FACT has a reduced interaction with CENP-ACse4 in vivo. Centromere identity and its epigenetic maintenance require the incorporation of a histone H3 variant called CENP-A at centromeres. CENP-A mislocalization to ectopic sites may disrupt chromatin-based processes and chromosome segregation, so it is important to uncover the mechanisms by which this variant is exclusively localized to centromeres. Here, we identify a role for the conserved chromatin-modifying complex FACT (facilitates chromatin transcription/transactions) in preventing budding yeast CENP-ACse4 mislocalization to euchromatin by mediating its proteolysis. The Spt16 subunit of the FACT complex binds to Psh1 (Pob3/Spt16/histone), an E3 ubiquitin ligase that targets CENP-ACse4 for degradation. The interaction between Psh1 and Spt16 is critical for both CENP-ACse4 ubiquitylation and its exclusion from euchromatin. We found that Psh1 cannot efficiently ubiquitylate CENP-ACse4 nucleosomes in vitro, suggesting that additional factors must facilitate CENP-ACse4 removal from chromatin in vivo. Consistent with this, a Psh1 mutant that cannot associate with FACT has a reduced interaction with CENP-ACse4 in vivo. Together, our data identify a previously unknown mechanism to maintain centromere identity and genomic stability through the FACT-mediated degradation of ectopically localized CENP-ACse4.
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DOI:
10.1083/jcb.201001013
发表时间:
2010-06-28
期刊:
The Journal of cell biology
影响因子:
--
作者:
Carroll CW;Milks KJ;Straight AF
通讯作者:
Straight AF
影响因子:
16
作者:
Camahort, Raymond;Shivaraju, Manjunatha;Mattingly, Mark;Li, Bing;Nakanishi, Shima;Zhu, Dongxiao;Shilatifard, Ali;Workman, Jerry L.;Gerton, Jennifer L.
通讯作者:
Gerton, Jennifer L.
影响因子:
37.3
作者:
Amato A;Schillaci T;Lentini L;Di Leonardo A
通讯作者:
Di Leonardo A
影响因子:
16
作者:
Hewawasam G;Shivaraju M;Mattingly M;Venkatesh S;Martin-Brown S;Florens L;Workman JL;Gerton JL
通讯作者:
Gerton JL
影响因子:
5.3
作者:
Gelbart, ME;Rechsteiner, T;Tsukiyama, T
通讯作者:
Tsukiyama, T