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- W2072912603 abstract "Modified DNA bases are widespread in biology. 5-Methylcytosine (mC) is a predominant epigenetic marker in higher eukaryotes involved in gene regulation, development, aging, cancer, and disease. Recently, 5-hydroxymethylcytosine (hmC) was identified in mammalian brain tissue and stem cells. However, most of the currently available assays cannot distinguish mC from hmC in DNA fragments. We investigate here the physical properties of DNA with modified cytosines, in efforts to develop a physical tool that distinguishes mC from hmC in DNA fragments. Molecular dynamics simulations reveal that polar cytosine modifications affect internal base pair dynamics, while experimental evidence suggest a correlation between the modified cytosine’s polarity, DNA flexibility, and duplex stability. On the basis of these physical differences, solid-state nanopores can rapidly discriminate among DNA fragments with mC or hmC modification by sampling a few hundred molecules in the solution. Further, the relative proportion of hmC in the sample can be determined from the electronic signature of the intact DNA fragment." @default.
- W2072912603 created "2016-06-24" @default.
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- W2072912603 date "2010-12-14" @default.
- W2072912603 modified "2023-09-26" @default.
- W2072912603 title "Discrimination of Methylcytosine from Hydroxymethylcytosine in DNA Molecules" @default.
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- W2072912603 doi "https://doi.org/10.1021/ja107836t" @default.
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