The CHD remodeling factor Hrp1 stimulates CENP-A loading to centromeres.

The CHD remodeling factor Hrp1 stimulates CENP-A loading to centromeres.
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DOI:
10.1093/nar/gki579
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发表时间:
2005
影响因子:
14.9
通讯作者:
Ekwall K
Ekwall K
中科院分区:
生物学2区
文献类型:
--
作者:
Walfridsson J;Bjerling P;Thalen M;Yoo EJ;Park SD;Ekwall K

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裂殖酵母的着丝粒排列有一个中央核心DNA序列,两侧是重复序列。着丝粒相关的组蛋白H3变体Cnp 1(SpCENP-A)仅与中央核心DNA结合,而异染色质蛋白和粘着蛋白与周围的外部重复序列结合。CHD(chromo-helicase/ATPase DNA binding)染色质重塑因子最近被证明影响体外染色质组装。在这里,我们报告CHD蛋白Hrp 1在裂殖酵母着丝粒中起着关键作用。hrp 1 Δ突变体破坏了着丝粒外部重复序列和中心核心区域的沉默,并显示出染色体分离缺陷,这是两个区域功能障碍的特征。重要的是,需要Hrp 1来维持高水平的Cnp 1和低水平的组蛋白H3和H4乙酰化在中央核心区域。Hrp 1与着丝粒直接相互作用,在早期S-期时,着丝粒复制,这表明Hrp 1在DNA复制过程中的染色质组装中发挥直接作用。
Centromeres of fission yeast are arranged with a central core DNA sequence flanked by repeated sequences. The centromere-associated histone H3 variant Cnp1 (SpCENP-A) binds exclusively to central core DNA, while the heterochromatin proteins and cohesins bind the surrounding outer repeats. CHD (chromo-helicase/ATPase DNA binding) chromatin remodeling factors were recently shown to affect chromatin assembly in vitro. Here, we report that the CHD protein Hrp1 plays a key role at fission yeast centromeres. The hrp1Δ mutant disrupts silencing of the outer repeats and central core regions of the centromere and displays chromosome segregation defects characteristic for dysfunction of both regions. Importantly, Hrp1 is required to maintain high levels of Cnp1 and low levels of histone H3 and H4 acetylation at the central core region. Hrp1 interacts directly with the centromere in early S-phase when centromeres are replicated, suggesting that Hrp1 plays a direct role in chromatin assembly during DNA replication.
DOI: 10.1016/s1097-2765(04)00103-0
发表时间: 2004-03-12
期刊: MOLECULAR CELL
影响因子: 16
作者:
Huang, J;Hsu, JM;Laurent, BC
通讯作者: Laurent, BC
DOI: 10.1016/s1097-2765(03)00011-x
发表时间: 2003-01-01
期刊: MOLECULAR CELL
影响因子: 16
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通讯作者: Takahashi, K
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发表时间: 2001-09-01
影响因子: 3.3
作者:
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通讯作者: Ekwall, K
DOI: 10.1038/44062
发表时间: 1999-10-07
期刊: NATURE
影响因子: 64.8
作者:
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通讯作者: Henikoff, S
DOI: 10.1128/mcb.23.9.3202-3215.2003
发表时间: 2003-05-01
影响因子: 5.3
作者:
Hsu, JM;Huang, J;Laurent, BC
通讯作者: Laurent, BC