Sequence-specific recognition of methylated DNA by human zinc-finger proteins.

Sequence-specific recognition of methylated DNA by human zinc-finger proteins.
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DOI:
10.1093/nar/gkq280
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发表时间:
2010-08
影响因子:
14.9
通讯作者:
Defossez PA
Defossez PA
中科院分区:
生物学2区
文献类型:
--
作者:
Sasai N;Nakao M;Defossez PA

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DNA甲基化是一种重要的表观遗传标记。三种类型的哺乳动物蛋白质识别甲基化DNA:MBD蛋白质、SRA蛋白质和锌指蛋白Kaiso、ZBTB 4和ZBTB 38。最后三种蛋白质可以结合甲基化的DNA或未甲基化的共有序列;这是如何实现的在很大程度上尚不清楚。在这里,我们报告说,人类锌指蛋白Kaiso,ZBTB 4和ZBTB 38可以结合甲基化的DNA在一个序列特异性的方式,他们可能会使用一种模式的结合常见的其他锌指蛋白。这表明可能存在许多其他序列特异性甲基结合蛋白。
DNA methylation is an essential epigenetic mark. Three classes of mammalian proteins recognize methylated DNA: MBD proteins, SRA proteins and the zinc-finger proteins Kaiso, ZBTB4 and ZBTB38. The last three proteins can bind either methylated DNA or unmethylated consensus sequences; how this is achieved is largely unclear. Here, we report that the human zinc-finger proteins Kaiso, ZBTB4 and ZBTB38 can bind methylated DNA in a sequence-specific manner, and that they may use a mode of binding common to other zinc-finger proteins. This suggests that many other sequence-specific methyl binding proteins may exist.
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