New functions for an old variant: no substitute for histone H3.3.

New functions for an old variant: no substitute for histone H3.3.
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DOI:
10.1016/j.gde.2010.01.003
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发表时间:
2010-04
影响因子:
4
通讯作者:
Allis, C. David
Allis, C. David
中科院分区:
生物学2区
文献类型:
--
作者:
Elsaesser, Simon J.;Goldberg, Aaron D.;Allis, C. David

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组蛋白通常有不同的变体,除了在包装DNA中发挥基本作用外,还具有特殊功能。后生动物组蛋白H3.3与活性转录关系最为密切。其在活性基因和启动子处的组蛋白置换中的作用保守至酵母中的单个组蛋白H3。然而,最近在果蝇中进行的遗传研究对其作为活性染色质标志的重要性提出了挑战,并揭示了H3.3在生殖系中的重要功能。H3.3与经典H3的氨基酸序列差异非常小,因此完成了令人惊讶的多种细胞和发育过程。
Histone proteins often come in different variants serving specialized functions in addition to their fundamental role in packaging DNA. The metazoan histone H3.3 has been most closely associated with active transcription. Its role in histone replacement at active genes and promoters is conserved to the single histone H3 in yeast. However, recent genetic studies in flies have challenged its importance as a mark of active chromatin, and revealed unexpected insights into essential functions of H3.3 in the germline. With strikingly little amino acid sequence difference to the canonical H3, H3.3 therefore accomplishes a surprising variety of cellular and developmental processes.
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