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Nobuhiro Sasai Mitsuyoshi Nakao Pierre-Antoine Defossez 《Nucleic acids research》2010,38(15):5015-5022
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. 相似文献
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A. V. Prokhortchouk D. S. Aitkhozhina A. A. Sablina A. S. Ruzov E. B. Prokhortchouk 《Russian Journal of Genetics》2001,37(6):603-609
A protein specifically binding to a symmetrically methylated DNA fragment of the first intron of the mts1gene was studied. The protein was purified by gel filtration and affinity chromatography. Mass spectrometry showed that the protein is Kaiso, a new member of the BTB/POZ family. To study the association with methylated DNA sequences in vivo, the location of Kaiso in NIH 3T3 cells was analyzed. Immunofluorescent staining with polyclonal antibodies against Kaiso showed that the protein is predominantly associated with the nucleoli. The causes of its distribution awaits further investigation. The zinc-finger domains of Kaiso were for the first time demonstrated to specifically recognize symmetrically methylated DNA sequences in vitro. 相似文献
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