Identification of 67 histone marks and histone lysine crotonylation as a new type of histone modification.

Identification of 67 histone marks and histone lysine crotonylation as a new type of histone modification.
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DOI:
10.1016/j.cell.2011.08.008
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发表时间:
2011-09-16
期刊:
影响因子:
64.5
通讯作者:
Zhao Y
Zhao Y
中科院分区:
生物学1区
文献类型:
--
作者:
Tan M;Luo H;Lee S;Jin F;Yang JS;Montellier E;Buchou T;Cheng Z;Rousseaux S;Rajagopal N;Lu Z;Ye Z;Zhu Q;Wysocka J;Ye Y;Khochbin S;Ren B;Zhao Y

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我们使用综合方法在此报告了 67 个新组蛋白标记的鉴定,这一发现使目前已知组蛋白标记的数量增加了约 70%。我们验证了新发现的标记之一赖氨酸巴豆酰化(Kcr)是一种新颖的、进化上保守的组蛋白翻译后修饰。 Kcr 的独特结构和基因组定位表明它在机制和功能上不同于赖氨酸乙酰化 (Kac),这是一种先前描述的翻译后修饰。具体来说,在人类体细胞和小鼠雄性生殖细胞基因组中,组蛋白 Kcr 标记活性启动子或潜在增强子。在减数分裂后的雄性生殖细胞中,Kcr 在性染色体上富集,并特异性标记睾丸特异性基因,包括很大一部分在单倍体细胞中逃避性染色体失活的 X 连锁基因。因此,这些结果极大地扩展了组蛋白 PTM 位点的范围,并将 Kcr 指定为减数分裂后雄性生殖细胞中活跃性染色体连锁基因的特定标记。
Using an integrated approach, we here report the identification of 67 novel histone marks, a discovery that increases the current number of known histone marks by about 70%. We verified one of the newly-identified marks, lysine crotonylation (Kcr), as a novel, evolutionarily-conserved histone post-translational modification. The unique structure and genomic localization of Kcr suggest that it is mechanistically and functionally different from lysine acetylation (Kac), a previously-described post-translational modification. Specifically, in both human somatic and mouse male germ cell genomes, histone Kcr marks either active promoters or potential enhancers. In male germinal cells immediately following meiosis, Kcr is enriched on sex chromosomes and specifically marks testis-specific genes, including a significant proportion of X-linked genes that escape sex chromosome inactivation in haploid cells. These results therefore dramatically extend the repertoire of histone PTM sites and designate Kcr as a specific mark of active sex chromosome-linked genes in post-meiotic male germ cells.
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