Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

High resolution mapping of modified nucleobases in DNA using excision repair enzymes

ABSTRACT: High resolution mapping of modified nucleobases in DNA using excision repair enzymes

PROVIDER: PRJNA223409 | ENA |

REPOSITORIES: ENA

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
	SRR1015390.fastq.gz	Fastqsanger.gz
	SRR1015391.fastq.gz	Fastqsanger.gz
	SRR1015392.fastq.gz	Fastqsanger.gz
	SRR1015393.fastq.gz	Fastqsanger.gz
	SRR1015394.fastq.gz	Fastqsanger.gz

Items per page:

1 - 5 of 11

Similar Datasets

High resolution mapping of modified nucleobases in DNA using excision repair enzymes

Project description:Data from Excision-seq experiments to map deoxyuridine and pyrimidine dimers in S. cerevisiae and E. coli For uracil mapping in pre-digestion Excision-seq, uracil was excised from genomic DNA from dut ung yeast and bacteria yielding double-stranded DNA fragments. Adapters were ligated to these fragments for Illumina library preparation. Using this method, the number of reads at a genomic location corresponds to the quantity of dU at that location. In post-digestion Excision-seq, uracil-containing library fragments are destroyed by UDG treatment, thus coverage is inversely proportional to uracil content. For pyrimidine dimer Excision-seq, yeast were irradiated with high doses of UVC light to generate a large number of DNA modifications. Using the excision repair enzyme UVDE from S. pombe, we excised pyrimidine dimers, cutting the phosphodieseter bond to release small double stranded fragments. These fragments were repaired with either CPD photolyase or 6-4 photolyase to generate independent libraries for each modification type. Illumina adapters were ligated to these fragments for library preparation. Using this method the number of reads at a genomic location corresponds to the quantity of the 3' pyrimidine of the dimer.

2014-05-15 | E-GEOD-51361 | biostudies-arrayexpress

High resolution mapping of modified nucleobases in DNA using excision repair enzymes

Project description:Data from Excision-seq experiments to map deoxyuridine and pyrimidine dimers in S. cerevisiae and E. coli

2014-05-15 | GSE51361 | GEO

High resolution mapping of modified DNA nucleobases using excision repair enzymes.

Project description:The incorporation and creation of modified nucleobases in DNA have profound effects on genome function. We describe methods for mapping positions and local content of modified DNA nucleobases in genomic DNA. We combined in vitro nucleobase excision with massively parallel DNA sequencing (Excision-seq) to determine the locations of modified nucleobases in genomic DNA. We applied the Excision-seq method to map uracil in E. coli and budding yeast and discovered significant variation in uracil content, wherein uracil is excluded from the earliest and latest replicating regions of the genome, possibly driven by changes in nucleotide pool composition. We also used Excision-seq to identify sites of pyrimidine dimer formation induced by UV light exposure, where the method could distinguish between sites of cyclobutane and 6-4 photoproduct formation. These UV mapping data enabled analysis of local sequence bias around pyrimidine dimers and suggested a preference for an adenosine downstream from 6-4 photoproducts. The Excision-seq method is broadly applicable for high precision, genome-wide mapping of modified nucleobases with cognate repair enzymes.

| S-EPMC4158761 | biostudies-literature

Genome-wide analysis of human global and transcription-coupled excision repair of UV damage at single-nucleotide resolution

Project description:We developed a method for genome-wide mapping of DNA excision repair named XR-seq (eXcision Repair-seq). Human nucleotide excision repair generates two incisions surrounding the site of damage, creating a ~30-mer. In XR-seq, this fragment is isolated and subjected to high-throughput sequencing. We used XR-seq to produce stranded, nucleotide-resolution maps of repair of two UV-induced DNA damages in human cells, cyclobutane pyrimidine dimers (CPDs) and (6-4) pyrimidine-pyrimidone photoproducts ((6-4)PPs). In wild-type cells, CPD repair was highly associated with transcription, specifically with the template strand. Experiments in cells defective in either transcription-coupled excision repair or general excision repair isolated the contribution of each pathway to the overall repair pattern, and showed that transcription-coupled repair of both photoproducts occurs exclusively on the template strand. XR-seq maps capture transcription-coupled repair at sites of divergent gene promoters and bi-directional eRNA production at enhancers. XR-seq data also uncovered the repair characteristics and novel sequence preferences of CPDs and (6-4)PPs. XR-seq and the resulting repair maps will facilitate studies of the effects of genomic location, chromatin context, transcription, and replication on DNA repair in human cells. We have performed XR-seq for two types of UV-induced damages (CPD and (6-4)PP) in three different cell lines: NHF1, XP-C (XP4PA-SV-EB, GM15983)), and CS-B (CS1ANps3g2, GM16095). Two biological replicates were performed for each experiment, in which independent cell populations were UV treated and subjected to XR-seq.

2015-04-19 | E-GEOD-67941 | biostudies-arrayexpress

Distinct roles for ATP-dependent chromatin remodeling enzymes in nucleotide excision repair in yeast

Project description:Distinct roles for ATP-dependent chromatin remodeling enzymes in nucleotide excision repair in yeast

| PRJNA679838 | ENA

Ribonucleotide excision repair prevents intestinal tumorigenesis

Project description:Ribonucleotide excision repair prevents intestinal tumorigenesis

| PRJNA436583 | ENA

Genome-wide analysis of human global and transcription-coupled excision repair of UV damage at single-nucleotide resolution

2015-04-19 | GSE67941 | GEO

Genome-wide repair maps of nucleotide excision repair in Drosophila and S2 cells.

Project description:We report the application of single-molecule-based sequencing technology (XR-seq) for high-throughput profiling of nucleotide excision repair in Drosophila four developmental stages and S2 cells. By obtaining over six billion bases of sequence from UV and cisplatin damage antibodies immunoprecipitated excision DNA, we generated genome-wide nucleotide excision repair maps of Drosophila Embryo, Larva, Pupa , two gender of adults and S2 cells . We find that Drosophila performs transcription-coupled repair (TCR) at all its developmental stages. S2 cell carry out TCR response to both UV and Cisplatin damage. Finally, we show that XPC repair factor is required for both global and transcription-coupled repair in Drosophila. This study provides the mechanism of nucleotide excision repair of Drosophila in vivo and vitro response to UV and Cisplatin damage.

2022-02-25 | GSE184926 | GEO

Nucleotide excision repair capacity increases during differentiation of human embryonic carcinoma cells into neurons and muscle cells

Project description:Embryonic stem cells can self-renew and differentiate, holding great promise for regenerative medicine. They also employ multiple mechanisms to preserve the integrity of their genomes. Nucleotide excision repair, a versatile repair mechanism, removes bulky DNA adducts from the genome. However, the dynamics of the capacity of nucleotide excision repair during stem cell differentiation remain unclear. Here, using immunoslot blot assay, we measured repair rates of UV-induced DNA damage during differentiation of human embryonic carcinoma (NTERA-2) cells into neurons and muscle cells. Our results revealed that the capacity of nucleotide excision repair increases as cell differentiation progresses. We also found that inhibition of the apoptotic signaling pathway has no effect on nucleotide excision repair capacity. Furthermore, RNA-seq-based transcriptomic analysis indicated that expression levels of four core repair factors, xeroderma pigmentosum (XP) complementation group A (XPA), XPC, XPG, and XPF-ERCC1, are progressively up-regulated during differentiation, but not those of replication protein A (RPA) and transcription factor IIH (TFIIH). Together, our findings reveal that increase of nucleotide excision repair capacity accompanies cell differentiation, supported by the up-regulated transcription of genes encoding DNA repair enzymes during differentiation of two distinct cell lineages.

2019-03-07 | GSE125370 | GEO

Transcriptional analysis of nucleotide excision repair defects

Project description:Transcriptional analysis of nucleotide excision repair defects

| PRJNA714383 | ENA