Nucleosomes Positioned by ORC Facilitate the Initiation of DNA Replication
The packaging of eukaryotic DNA into nucleosomes is a critical regulator of nuclear events. To address the interplay between chromatin and replication initiation, we have assessed the determinants and function of the nucleosomal configuration of S. cerevisiae replication origins. Using in vitro and...
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| Veröffentlicht in: | Molecular cell 2001, Vol.7 (1), p.21-30 |
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| creator | Lipford, J.Russell Bell, Stephen P |
| description | The packaging of eukaryotic DNA into nucleosomes is a critical regulator of nuclear events. To address the interplay between chromatin and replication initiation, we have assessed the determinants and function of the nucleosomal configuration of
S. cerevisiae replication origins. Using in vitro and in vivo assays, we demonstrate that the yeast initiator, the origin recognition complex (ORC), is required to maintain the nucleosomal configuration adjacent to origins. Disruption of the ORC-directed nucleosomal arrangement at an origin interferes with initiation of replication, but does not alter the association of ORC with the origin. Instead, the nucleosomes positioned by ORC are important for prereplicative complex formation. These findings suggest that origin-proximal nucleosomes facilitate replication initiation, and that local chromatin structure affects origin function. |
| doi_str_mv | 10.1016/S1097-2765(01)00151-4 |
| format | Article |
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| source | MEDLINE; Cell Press Free Archives; Elsevier ScienceDirect Journals; EZB-FREE-00999 freely available EZB journals; Free Full-Text Journals in Chemistry |
| subjects | Chromatin - genetics DNA Replication - physiology DNA, Fungal - physiology DNA-Binding Proteins - physiology Fungal Proteins - physiology In Vitro Techniques Nucleosomes - genetics origin recognition complex Plasmids - genetics Replication Origin - genetics Saccharomyces cerevisiae Saccharomyces cerevisiae Proteins Transcription Factors - physiology Transcription, Genetic - physiology |
| title | Nucleosomes Positioned by ORC Facilitate the Initiation of DNA Replication |
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