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Using MIRA-seq, we have characterized the DNA methylome of metastatic melanoma and normal melanocytes. Individual tumors contained several thousand hypermethylated regions. We discovered 179 tumor-specific methylation peaks present in all (27/27) melanomas that may be effective disease biomarkers, and 3113 methylation peaks were seen in >40% of the tumors. We found that 150 of the approximately...
The DNA base 5-hydroxymethylcytosine (5hmC) is produced by enzymatic oxidation of 5-methylcytosine (5mC) by 5mC oxidases (the Tet proteins). Since 5hmC is recognized poorly by DNA methyltransferases, DNA methylation may be lost at 5hmC sites during DNA replication. In addition, 5hmC can be oxidized further by Tet proteins and converted to 5-formylcytosine and 5-carboxylcytosine, two bases that can...
Methylation of cytosines at CpG dinucleotides is essential for mammalian development. MeCP2, MBD1, MBD2, MBD3, and MBD4 comprise a family of proteins that contain a methyl-CpG binding domain (MBD). Except for MBD4, these proteins are involved in gene silencing imposed by methylated DNA. We have identified a human gene that codes for a protein that is 42% identical to MBD3 and 38% identical to MBD2...
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