CHD1 motor protein is required for deposition of histone variant H3.3 into chromatin in vivo.

CHD1 motor protein is required for deposition of histone variant H3.3 into chromatin in vivo.
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DOI:
10.1126/science.1145339
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发表时间:
2007-08-24
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Fyodorov DV
Fyodorov DV
中科院分区:
其他
文献类型:
--
作者:
Konev AY;Tribus M;Park SY;Podhraski V;Lim CY;Emelyanov AV;Vershilova E;Pirrotta V;Kadonaga JT;Lusser A;Fyodorov DV

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核心组蛋白在体内沉积到染色质中是通过一种由分子马达蛋白(如CHD1)催化的主动的ATP依赖性机制发生的。染色质的组织影响真核生物核DNA代谢的各个方面。H3.3是一种进化上保守的组蛋白变体,是非复制依赖性染色质组装的关键底物。在果蝇胚胎中消除母体染色质重塑因子CHD1废除了H3.3掺入雄性原核,使父本基因组不能参与合子有丝分裂,并导致单倍体胚胎的发育。此外,CHD1而不是ISWI与细胞质提取物中的HIRA相互作用。我们的研究结果建立CHD1作为一个主要因素,在细胞核中的组蛋白代谢的替代,并揭示了CHD1在基因组规模的,复制独立的核小体组装的最早的发展情况下的关键作用。此外,我们的研究结果指出,在体内组蛋白沉积的ATP利用马达蛋白的一般要求。
Deposition of core histones into chromatin in vivo transpires through an active, ATP-dependent mechanism catalyzed by molecular motor proteins, such as CHD1. The organization of chromatin affects all aspects of nuclear DNA metabolism in eukaryotes. H3.3 is an evolutionarily conserved histone variant and a key substrate for replication-independent chromatin assembly. Elimination of maternal chromatin remodelling factor CHD1 in Drosophila embryos abolishes incorporation of H3.3 into the male pronucleus, renders the paternal genome unable to participate in zygotic mitoses and leads to the development of haploid embryos. Furthermore, CHD1 but not ISWI interacts with HIRA in cytoplasmic extracts. Our findings establish CHD1 as a major factor in replacement histone metabolism in the nucleus and reveal a critical role for CHD1 in the earliest developmental instances of genome-scale, replication-independent nucleosome assembly. Furthermore, our results point to the general requirement of ATP-utilizing motor proteins for histone deposition in vivo.
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