SMYD5 is a histone H3-specific methyltransferase mediating mono-methylation of histone H3 lysine 36 and 37.

SMYD5 is a histone H3-specific methyltransferase mediating mono-methylation of histone H3 lysine 36 and 37.
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SMYD5是组蛋白H3特异性甲基转移酶,介导组蛋白H3赖氨酸36和37的单甲基化。

DOI:
10.1016/j.bbrc.2022.02.043
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发表时间:
2022-04-09
影响因子:
3.1
通讯作者:
He J
He J
中科院分区:
生物学4区
文献类型:
--
作者:
Aljazi MB;Gao Y;Wu Y;He J

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虽然一些组蛋白H3赖氨酸残基上的翻译后修饰(PMT)已得到很好的研究,但哺乳动物细胞中组蛋白H3赖氨酸37的PMT仍很大程度上未知。在这项研究中,我们提供的证据表明,SMYD家族成员5(SMYD 5)是一个组蛋白H3特异性甲基转移酶,催化H3赖氨酸36和37(H3 K36/K37 me 1)在体外的单甲基化。位点突变分析表明,在其催化SET结构域中的物种保守的组氨酸是需要其组蛋白甲基转移酶活性。小鼠胚胎干细胞(mESC)中Smyd 5基因的缺失部分降低了细胞中组蛋白H3 K37 me 1的水平,提示SMYD 5是体内催化组蛋白H3 K37 me 1的组蛋白甲基转移酶之一。因此,我们的研究表明,SMYD 5是一个组蛋白H3特异性甲基转移酶,介导组蛋白H3 K36/K37 me 1,这为进一步研究其在哺乳动物细胞中的功能提供了生化基础。
Although posttranslational modifications (PMTs) on some histone H3 lysine residues are well studied, the PMTs of histone H3 lysine 37 in mammalian cells remain largely unknown. In this study, we provide evidence to show that SMYD family member 5 (SMYD5) is a histone H3-specfic methyltransferase that catalyzes mono-methylation of H3 lysine 36 and 37 (H3K36/K37me1) in vitro. The site-mutagenesis analysis shows that a species-conserved histidine in its catalytic SET domain is required for its histone methyltransferase activity. Genetic deletion of Smyd5 in murine embryonic stem cells (mESCs) partially reduces the global histone H3K37me1 level in cells, suggesting SMYD5 is one of histone methyltransferases catalyzing histone H3K37me1 in vivo. Hence, our study reveals that SMYD5 is a histone H3-specific methyltransferase that mediates histone H3K36/K37me1, which provides a biochemical basis for further studying its functions in mammalian cells.
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