Polycomb group complexes--many combinations, many functions.

Polycomb group complexes--many combinations, many functions.
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DOI:
10.1016/j.tcb.2009.10.001
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发表时间:
2009-12
影响因子:
19
通讯作者:
Kerppola, Tom K.
Kerppola, Tom K.
中科院分区:
生物学1区
文献类型:
--
作者:
Kerppola, Tom K.

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多梳蛋白组(PcG)是一类转录调控蛋白,从胚胎早期发育到出生再到成年,控制着多种基因的表达。PcG蛋白形成若干复合物,据认为这些复合物协同抑制基因转录。单个PcG蛋白具有独特的特性,编码不同PcG蛋白的基因发生突变会导致不同的表型。组蛋白修饰在某些PcG蛋白功能中起重要作用,但并非普遍必需。脊椎动物PcG蛋白对基因的特异性招募、转录抑制以及基因的选择性去抑制机制尚未完全了解。对这一神秘的发育调控蛋白组进行的未来研究肯定会产生意想不到的发现。
Polycomb Group (PcG) proteins are transcription regulatory proteins that control the expression of a variety of genes from early embryogenesis through birth to adulthood. PcG proteins form several complexes that are thought to collaborate to repress gene transcription. Individual PcG proteins have unique characteristics and mutations in genes encoding different PcG proteins cause distinct phenotypes. Histone modifications have important roles in some PcG protein functions, but they are not universally required. The mechanisms of gene-specific recruitment, transcription repression, and selective derepression of genes by vertebrate PcG proteins are incompletely understood. Future studies of this enigmatic group of developmental regulators are certain to produce unanticipated discoveries.
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