H3K9 methyltransferase G9a negatively regulates UHRF1 transcription during leukemia cell differentiation.
H3K9 methyltransferase G9a negatively regulates UHRF1 transcription during leukemia cell differentiation.
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DOI:
10.1093/nar/gkv183
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发表时间:
2015-04-20
影响因子:
14.9
通讯作者:
Seo SB
中科院分区:
文献类型:
--
作者:
Kim KB;Son HJ;Choi S;Hahm JY;Jung H;Baek HJ;Kook H;Hahn Y;Kook H;Seo SB
Histone H3K9 methyltransferase (HMTase) G9a-mediated transcriptional repression is a major epigenetic silencing mechanism. UHRF1 (ubiquitin-like with PHD and ring finger domains 1) binds to hemimethylated DNA and plays an essential role in the maintenance of DNA methylation. Here, we provide evidence that UHRF1 is transcriptionally downregulated by H3K9 HMTase G9a. We found that increased expression of G9a along with transcription factor YY1 specifically represses UHRF1 transcription during TPA-mediated leukemia cell differentiation. Using ChIP analysis, we found that UHRF1 was among the transcriptionally silenced genes during leukemia cell differentiation. Using a DNA methylation profiling array, we discovered that the UHRF1 promoter was hypomethylated in samples from leukemia patients, further supporting its overexpression and oncogenic activity. Finally, we showed that G9a regulates UHRF1-mediated H3K23 ubiquitination and proper DNA replication maintenance. Therefore, we propose that H3K9 HMTase G9a is a specific epigenetic regulator of UHRF1.
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