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- W2000540786 abstract "The nuclear genomes of vertebrates show a highly organized program of DNA replication where GC-rich isochores are replicated early in S-phase, while AT-rich isochores are late replicating. GC-rich regions are gene dense and are enriched for active transcription, suggesting a connection between gene regulation and replication timing. Insulator elements can organize independent domains of gene transcription and are suitable candidates for being key regulators of replication timing. We have tested the impact of inserting a strong replication origin flanked by the β-globin HS4 insulator on the replication timing of naturally late replicating regions in two different avian cell types, DT40 (lymphoid) and 6C2 (erythroid). We find that the HS4 insulator has the capacity to impose a shift to earlier replication. This shift requires the presence of HS4 on both sides of the replication origin and results in an advance of replication timing of the target locus from the second half of S-phase to the first half when a transcribed gene is positioned nearby. Moreover, we find that the USF transcription factor binding site is the key cis-element inside the HS4 insulator that controls replication timing. Taken together, our data identify a combination of cis-elements that might constitute the basic unit of multi-replicon megabase-sized early domains of DNA replication." @default.
- W2000540786 created "2016-06-24" @default.
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- W2000540786 date "2012-03-06" @default.
- W2000540786 modified "2023-10-03" @default.
- W2000540786 title "USF Binding Sequences from the HS4 Insulator Element Impose Early Replication Timing on a Vertebrate Replicator" @default.
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- W2000540786 doi "https://doi.org/10.1371/journal.pbio.1001277" @default.
- W2000540786 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3295818" @default.
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