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Persistent initiation of DNA replication and chromatin-bound MCM proteins during the cell cycle in cdc6 mutants
Open accessAbstract
Faithful inheritance of genetic information requires that DNA be copied only once each cell cycle. Initiation of DNA replication involves the establishment of a prereplication complex (pre-RC) and subsequent activation by CDK/cyclins, converting the pre-RC to a post-RC. The origin recognition complex (ORC), Cdc6p, and the MCM proteins are required for establishing the pre-RC. We show that all six ORC subunits remain bound to chromatin throughout the cell cycle, whereas the MCM proteins cycle on and off, corresponding precisely to transitions of the RC. A newly isolated cdc6 mutant displays promiscuous initiation of DNA replication, increased nuclear DNA content, and constant MCM protein association with chromatin throughout the cell cycle. This gain-of-function cdc6 mutant ignores the negative controls imposed normally on initiation by the CDK/cyclins, suggesting that Cdc6p is a key mediator of once-per-cell-cycle control of DNA replication.
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Citations
Cited by
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Metadata
- Authors
- Liang, C., & Stillman, B.
- Venue
- Genes & Development
- Publisher
- Cold Spring Harbor Laboratory
- Published
- 1997-12-15
- Volume
- 11
- Issue
- 24
- Pages
- 3375-3386
- ISSN
- 0890-9369 (ISSN-L)
- 1549-5477
- OpenAlex
- W2134954412
- Cited by
- 358
- References
- 0
- Type
- posted content
- Language
- en
- Open access
- diamond
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- Liang, C., & Stillman, B. (1997). Persistent initiation of DNA replication and chromatin-bound MCM proteins during the cell cycle in cdc6 mutants. Genes & Development. https://doi.org/10.1101/gad.11.24.3375
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