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Genome-wide High Resolution Mapping of Mitotic DNA Synthesis Sites and Common Fragile Sites by Direct Sequencing [WGS]

ABSTRACT: Genome-wide High Resolution Mapping of Mitotic DNA Synthesis Sites and Common Fragile Sites by Direct Sequencing [WGS]

PROVIDER: PRJNA628519 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11612563_1.fastq.gz	Fastqsanger.gz
	SRR11612563_2.fastq.gz	Fastqsanger.gz

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Genome-wide High Resolution Mapping of Mitotic DNA Synthesis Sites and Common Fragile Sites by Direct Sequencing [WGS]

Project description:Common fragile sites (CFSs) are genomic loci prone to the formation of breaks or gaps on metaphase chromosomes. Here, we seek to map human CFSs with high resolution on a genome-wide scale by sequencing the sites of mitotic DNA synthesis (MiDASeq) that are specific for CFSs. We generated a nucleotide-resolution atlas of MiDAS sites (MDSs) that covered most of know CFSs, and comprehensively analyzed their sequence characteristics and genomic features.

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Genome-wide High Resolution Mapping of Mitotic DNA Synthesis Sites and Common Fragile Sites by Direct Sequencing

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Genome-wide high-resolution mapping of mitotic DNA synthesis sites and common fragile sites by direct sequencing.

Project description:Common fragile sites (CFSs) are genomic loci prone to the formation of breaks or gaps on metaphase chromosomes. They are hotspots for chromosome rearrangements and structural variations, which have been extensively implicated in carcinogenesis, aging, and other pathological processes. Although many CFSs were identified decades ago, a consensus is still lacking for why they are particularly unstable and sensitive to replication perturbations. This is in part due to the lack of high-resolution mapping data for the vast majority of the CFSs, which has hindered mechanistic interrogations. Here, we seek to map human CFSs with high resolution on a genome-wide scale by sequencing the sites of mitotic DNA synthesis (MiDASeq) that are specific for CFSs. We generated a nucleotide-resolution atlas of MiDAS sites (MDSs) that covered most of the known CFSs, and comprehensively analyzed their sequence characteristics and genomic features. Our data on MDSs tallied well with long-standing hypotheses to explain CFS fragility while highlighting the contributions of late replication timing and large transcription units. Notably, the MDSs also encompassed most of the recurrent double-strand break clusters previously identified in mouse neural stem/progenitor cells, thus bridging evolutionarily conserved break points across species. Moreover, MiDAseq provides an important resource that can stimulate future research on CFSs to further unravel the mechanisms and biological relevance underlying these labile genomic regions.

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Genome-wide High Resolution Mapping of Mitotic DNA Synthesis Sites and Common Fragile Sites by Direct Sequencing

Project description:This SuperSeries is composed of the SubSeries listed below.

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