Histone H3.3 G34 Mutations Alter Histone H3K36 and H3K27 Methylation In Cis.

Histone H3.3 G34 Mutations Alter Histone H3K36 and H3K27 Methylation In Cis.
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DOI:
10.1016/j.jmb.2018.04.014
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发表时间:
2018-05-25
影响因子:
5.6
通讯作者:
Wen H
Wen H
中科院分区:
生物学2区
文献类型:
--
作者:
Shi L;Shi J;Shi X;Li W;Wen H

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组蛋白H3编码基因,特别是H3 F3 A和H3 F3 B,编码变体组蛋白H3.3的基因,在儿科脑和骨恶性肿瘤中以高频率突变。与K27 M和K36 M突变的广泛研究相比,对儿童胶质母细胞瘤或骨巨细胞瘤中发现的G34突变的机制知之甚少。在这里,我们报告说,与影响全局组蛋白甲基化的K27 M或K36 M不同,骨巨细胞瘤G34突变(G34 L/W)只影响相同突变组蛋白尾部(顺式)的组蛋白H3 K36和H3 K27甲基化,这是一种与已知组蛋白突变不同的机制。
Histone H3 encoding genes, particularly H3F3A and H3F3B, the genes encoding the variant histone H3.3, are mutated at high frequency in pediatric brain and bone malignancies. Compared to the extensive studies on K27M and K36M mutations, little is known about the mechanism of G34 mutations found in pediatric glioblastoma or giant cell tumors of the bone. Here we report that unlike the K27M or K36M that affect global histone methylation, the giant cell tumors of the bone G34 mutations (G34L/W) only affect histone H3K36 and H3K27 methylation on the same mutated histone tails (in cis), a mechanism distinct from known histone mutations.
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