Evaluating the global CpG methylation status of native DNA utilizing a bipartite split-luciferase sensor.
Evaluating the global CpG methylation status of native DNA utilizing a bipartite split-luciferase sensor.
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利用两部分分裂葡萄酸酶传感器评估天然DNA的全局CpG甲基化状态。
DOI:
10.1021/ac2015239
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发表时间:
2011-09-15
影响因子:
7.4
通讯作者:
Ghosh, Indraneel
中科院分区:
文献类型:
--
作者:
Badran, Ahmed H.;Furman, Jennifer L.;Ma, Andrew S.;Comi, Troy J.;Porter, Jason R.;Ghosh, Indraneel
Epigenetic modifications play an essential role in the regulation of gene expression and ultimately cell fate. Methylation of cytosine at CpG dinucleotides (mCpG) is an important epigenetic mark that has been correlated with cancer when present at promoter sites of tumor suppressor genes. In order to develop a rapid methodology for the direct assessment of global levels of DNA methylation, we first interrogated the methyl-CpG binding domains (MBDs), the Kaiso family of Cys2-His2 zinc fingers and a SET- and RING-associated (SRA) domain using a split-luciferase reassembly methodology. We identified MBD1 as the most selective domain for the discrimination between mCpG and CpG sites with over 90-fold selectivity. Utilizing a bipartite strategy, we constructed a purely methylation-dependent bipartite sensor for the direct detection of global levels of DNA methylation by attaching MBD1 domains to each of the split-luciferase halves. This new sensor was validated for the direct determination of genomic DNA methylation levels in in vitro studies without any intervening chemical or enzymatic processing of DNA. Finally, we demonstrated that this bipartite sensor can be utilized for monitoring dose-dependent changes in global levels of methylation in DNA from HeLa cells challenged with 5-aza-2′-deoxycytidine, a DNA methyltransferase inhibitor.
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DOI:
10.1073/pnas.95.25.14628
发表时间:
1998-12-08
影响因子:
11.1
作者:
Beerli, RR;Segal, DJ;Barbas, CF
通讯作者:
Barbas, CF
影响因子:
5.3
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通讯作者:
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影响因子:
16
作者:
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通讯作者:
Walkinshaw, Malcolm D.
影响因子:
15
作者:
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通讯作者:
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