Quantitative sequencing of 5-methylcytosine and 5-hydroxymethylcytosine at single-base resolution. Booth, M. J, Branco, M. R, Ficz, G., Oxley, D., Krueger, F., Reik, W., & Balasubramanian, S. Science (New York, N.Y.), 336(6083):934–7, May, 2012.
Quantitative sequencing of 5-methylcytosine and 5-hydroxymethylcytosine at single-base resolution. [link]Paper  doi  abstract   bibtex   
5-Methylcytosine can be converted to 5-hydroxymethylcytosine (5hmC) in mammalian DNA by the ten-eleven translocation (TET) enzymes. We introduce oxidative bisulfite sequencing (oxBS-Seq), the first method for quantitative mapping of 5hmC in genomic DNA at single-nucleotide resolution. Selective chemical oxidation of 5hmC to 5-formylcytosine (5fC) enables bisulfite conversion of 5fC to uracil. We demonstrate the utility of oxBS-Seq to map and quantify 5hmC at CpG islands (CGIs) in mouse embryonic stem (ES) cells and identify 800 5hmC-containing CGIs that have on average 3.3% hydroxymethylation. High levels of 5hmC were found in CGIs associated with transcriptional regulators and in long interspersed nuclear elements, suggesting that these regions might undergo epigenetic reprogramming in ES cells. Our results open new questions on 5hmC dynamics and sequence-specific targeting by TETs.
@article{Booth2012,
	title = {Quantitative sequencing of 5-methylcytosine and 5-hydroxymethylcytosine at single-base resolution.},
	volume = {336},
	issn = {1095-9203},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/22539555},
	doi = {10.1126/science.1220671},
	abstract = {5-Methylcytosine can be converted to 5-hydroxymethylcytosine (5hmC) in mammalian DNA by the ten-eleven translocation (TET) enzymes. We introduce oxidative bisulfite sequencing (oxBS-Seq), the first method for quantitative mapping of 5hmC in genomic DNA at single-nucleotide resolution. Selective chemical oxidation of 5hmC to 5-formylcytosine (5fC) enables bisulfite conversion of 5fC to uracil. We demonstrate the utility of oxBS-Seq to map and quantify 5hmC at CpG islands (CGIs) in mouse embryonic stem (ES) cells and identify 800 5hmC-containing CGIs that have on average 3.3\% hydroxymethylation. High levels of 5hmC were found in CGIs associated with transcriptional regulators and in long interspersed nuclear elements, suggesting that these regions might undergo epigenetic reprogramming in ES cells. Our results open new questions on 5hmC dynamics and sequence-specific targeting by TETs.},
	number = {6083},
	journal = {Science (New York, N.Y.)},
	author = {Booth, Michael J and Branco, Miguel R and Ficz, Gabriella and Oxley, David and Krueger, Felix and Reik, Wolf and Balasubramanian, Shankar},
	month = may,
	year = {2012},
	pmid = {22539555},
	keywords = {\#nosource, 5-Methylcytosine, 5-Methylcytosine: analysis, Animals, CpG Islands, Cytosine, Cytosine: analogs \& derivatives, Cytosine: analysis, Cytosine: chemistry, DNA, DNA Methylation, DNA: chemistry, DNA: genetics, Embryonic Stem Cells, Embryonic Stem Cells: physiology, Epigenesis, Genes, Genetic, High-Throughput Nucleotide Sequencing, Intracisternal A-Particle, Long Interspersed Nucleotide Elements, Mice, Oxidation-Reduction, Rhenium, Rhenium: chemistry, Sequence Analysis, Sulfites, Transcription, Uracil, Uracil: chemistry},
	pages = {934--7},
}

Downloads: 0