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GenomicsUnraveling cell type–specific and reprogrammable human replication origin signatures associated with G-quadruplex consensus motifs
Short nascent strands purification coupled to next-generation sequencing allowed us to identify replication origins on human genome in an extensive way, by mapping replication origins in 4 different cell types, IMR-90 fibroblasts, hESC H9 cells, iPSC Th Cl-4 cells and HeLa cells. We demonstrated the...
ORGANISM(S): Homo sapiens 
2012-07-01 | E-GEOD-37757 | biostudies-arrayexpress
GenomicsConservation of replication timing reveals global and local regulation of replication origin activity.
DNA replication initiates from defined locations called replication origins; some origins are highly active whereas others are dormant and rarely used. Origins also differ in their activation time resulting in particular genomic regions replicating at characteristic times and in a defined temporal o...
ORGANISM(S): Saccharomyces paradoxus 
2012-06-19 | E-GEOD-36045 | biostudies-arrayexpress
MetabolomicsPhotorespiration is linked to DNA methylation by formate as one-carbon source.
DNA methylation is a key epigenetic modification regulating genome organization, stability, and gene expression. Stable DNA methylation critically relies on methyl groups provided through folate-mediated one-carbon (C1) metabolism, yet the origin and regulation of C1 supply remain elusive. Here we d...
2026-01-06 | MTBLS13444 | MetaboLights
GenomicsPost-licensing specification of eukaryotic replication origins by facilitated Mcm2-7 sliding along DNA
Eukaryotic genomes are replicated from many origin sites that are licensed by the loading of inactive double hexamers of the replicative DNA helicase, Mcm2-7. How eukaryotic origin positions are specified remains elusive. Here we show that, contrary to the bacterial paradigm, eukaryotic origins are ...
ORGANISM(S): Saccharomyces cerevisiae 
2016-01-07 | E-GEOD-69065 | biostudies-arrayexpress
TranscriptomicsHigh resolution mapping of DNA replication origins in human genome
Because of the lack of information, regulation of DNA replication initiation in mammals is still poorly understood. In order to identify general rules, we have mapped replication origins along 1% of the human genome in HeLa cells. We found large gene-poor regions lacking origin and G+C rich regions ...
ORGANISM(S): Homo sapiens 
2010-05-18 | E-GEOD-10217 | biostudies-arrayexpress
TranscriptomicsMapping origins of replication in Arabidopsis thaliana: Examination of BrdU labeled DNA and unlabeled DNA in one cell type
Genomic integrity requires faithful chromosome duplication. Origins of replication are the genomic sites where DNA replication initiates in every cell cycle. There are multiple origins scattered throughout the eukaryotic genome whose genome-wide identification has been a hard challenge, especially i...
ORGANISM(S): Arabidopsis thaliana 
2011-11-06 | E-GEOD-21781 | biostudies-arrayexpress
ProteomicsConvergence of SIRT1 and ATR signaling to modulate replication origin dormancy
SIRT1 chromatin interactome analysis was performed to identify SIRT1 molecular targets involved in replication initiation from cells containing either WT or H363Y SIRT1. Co-IP-MS of pT530 SIRT1 from chromatin extracts was performed. Files are: 1422 WT SIRT1 untreated U2OS; 1423 WT SIRT1 H2O2 treated...
ORGANISM(S): Homo Sapiens (ncbitaxon:9606) 
MSV000088103 | MassIVE
MetabolomicsCell overgrowth potentiates osmotic and replication stresses to promote p38/p53/p21-dependent senescence
Abnormal increases in cell size are associated with senescence and cell cycle exit. The mechanisms by which overgrowth primes cells to withdraw from the cell cycle remain unknown. We address this question using CDK4/6 inhibitors, which arrest cells in G0/G1 and are licensed to treat advanced HR+/HER...
2025-10-24 | MTBLS8698 | MetaboLights
GenomicsGenome-wide mapping of human DNA-replication origins: levels of transcription at Orc1 sites regulate origin selection and replication timing
We report the genome-wide mapping of Orc1 binding-sites in mammals and their validation as active DNA-replication origins (ORIs). Orc1 sites are universally associated with transcription start sites (TSSs) of coding or non-coding RNAs. Transcription levels at the Orc1 sites directly correlate with r...
ORGANISM(S): Homo sapiens 
2012-09-18 | E-GEOD-37583 | biostudies-arrayexpress
TranscriptomicsTranscription Initiation Activity Sets Replication Origin Efficiency in Mammalian Cells
Genomic mapping of DNA replication origins (ORIs) in mammals provides a powerful means for understanding the regulatory complexity of our genome. Here we combine a genome-wide approach to identify preferential sites of DNA replication initiation at 0.4% of the mouse genome with detailed molecular an...
ORGANISM(S): Mus musculus 
2010-05-22 | E-GEOD-15082 | biostudies-arrayexpress
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