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Nucleotide resolution genome-wide mapping of 8-oxoG damage

ABSTRACT: Nucleotide resolution genome-wide mapping of 8-oxoG damage

PROVIDER: PRJNA445275 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR6879695.fastq.gz	Fastqsanger.gz
	SRR6879696.fastq.gz	Fastqsanger.gz
	SRR6879697.fastq.gz	Fastqsanger.gz

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Nucleotide resolution genome-wide mapping of 8-oxoG damage

Project description:Single nucleotide resolution sequencing of DNA damage is required to decipher the complex causal link between the identity and location of DNA adduct and mutation patterns in the genome. We coupled the specificity of the repair enzyme with the efficiency of a one-pot click-DNA ligation reaction to insert a readable oligonucleotide code sequence. The biocompatible code enabled high-throughput, base resolution sequencing of the 8-oxoguanine site and thus have named the method click-code-seq. By applying click-code-seq to a eukaryotic (yeast) genome, we uncovered thousands of 8-oxoguanine sites with features and patterns suggesting a potential relationship to chromatin formation and transcription.

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Nick-seq for singlenucleotide resolution genomic maps of DNA modifications and damage:DNA damage mapping

Project description:Endogenous and exogenous chemical modifications in DNA have profound influences on genome function. We have developed a novel technology, Nick-seq, for mapping variety of DNA chemical modifications across the genomes at single-nucleotide resolution, by which we achieved quantitative profiling of single-strand breaks, phosphorothioate modifications, and oxidative DNA damage sites. This method is applicable for mapping of any DNA metabolism events that are involved in or can be converted, enzymatically or chemically, to DNA strand breaks such as DNA modifications, damages, genome replication, and chromatin structures.

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Single-nucleotide resolution mapping of m6A and m6Am throughout the transcriptome

Project description:N6-methyladenosine (m6A) is the most abundant modified base in eukaryotic mRNA and has been linked to diverse effects on mRNA fate and function. Current m6A mapping approaches rely on immunoprecipitation of m6A-containing RNA fragments to identify regions of transcripts that contain m6A. This approach localizes m6A residues to 100-200 nt-long regions of transcripts. The precise position of m6A in mRNAs cannot be identified on a transcriptome-wide level because there are no chemical methods to distinguish between m6A and adenosine. Here we show that anti-m6A antibodies can induce specific mutational signatures at m6A residues after ultraviolet light-induced antibody-RNA crosslinking and reverse transcription. Similarly, we find these antibodies induce mutational signatures at N6, 2’-O-dimethyladenosine (m6Am), a nucleotide found at the first encoded position of certain mRNAs. Using these mutational signatures, we map m6A and m6Am at single-nucleotide resolution in human and mouse mRNA and identify snoRNAs as a novel class of m6A-containing ncRNAs. UV-crosslinking and immunoprecipitation with m6A-specific antibodies was used to map m6A and m6Am in cellular RNA with single nucleotide resolution.

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Single-nucleotide resolution mapping of DNA abasic sites by snAP-seq

Project description:Abasic (AP) sites are one of the most common forms of DNA damage which can lead to polymerase stalling, strand breaks and mutations. We developed snA-seq, a mapping method that reveals the location of abasic sites at base-resolution. Using synthetic DNA, we show that high selectivity for AP DNA is achieved. We use this method to explore the distribution of thymine modifications in the Leishmania major genome, by converting these into abasic sites using a glycosylase enzyme. We also apply snAP-seq to the human genome to study the distribution of endogenous AP sites, in both APE1 knockdown and control cells.

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Single-nucleotide resolution mapping of m6A and m6Am throughout the transcriptome

Project description:Single-nucleotide resolution mapping of m6A and m6Am throughout the transcriptome

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Dual Chemical Labeling Enables Nucleotide-Resolution Mapping of DNA Abasic Sites and Common Alkylation Damage in Human Mitochondrial DNA

Project description:Dual Chemical Labeling Enables Nucleotide-Resolution Mapping of DNA Abasic Sites and Common Alkylation Damage in Human Mitochondrial DNA

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