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- W1983621982 abstract "Over the last decade, data have accumulated that support a role for chromatin structure in regulating the initiation of DNA replication and its timing during S-phase.(1-3) However, the mechanisms underlying how chromatin structure influences replication initiation are not always understood. For example, in Drosophila histone acetylation at the ACE3 and Ori-β sequences near one of the amplified chorion loci is correlated with ORC (origin recognition complex) binding and re-replication of this locus.(4, 5) Whether histone acetylation promotes ORC binding or some later step in replication is not known. In yeast, hypo-acetylated heterochromatin and telomeric regions replicate late in S-phase(6, 7) but the mechanisms that restrict the initiation of replication at these loci are not fully understood. Nonetheless, it seems likely that histone acetylation and other types of histone modification will significantly impact DNA replication. A recent study published in Molecular Cell(8) reveals a role for the conserved NAD+-dependent histone deacetylase, Sir2(9-13), in inhibiting the assembly of the multiprotein complex necessary for the selection and activation of yeast replication origins. Here, we highlight key conclusions from this study, place them in perspective with earlier work, and outline important future questions." @default.
- W1983621982 created "2016-06-24" @default.
- W1983621982 creator A5033764439 @default.
- W1983621982 creator A5068812786 @default.
- W1983621982 date "2008-11-01" @default.
- W1983621982 modified "2023-09-25" @default.
- W1983621982 title "Beyond heterochromatin: SIR2 inhibits the initiation of DNA replication" @default.
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- W1983621982 doi "https://doi.org/10.4161/cc.7.21.6971" @default.
- W1983621982 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4529125" @default.
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