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| Content Provider | PubMed Central |
|---|---|
| Author | Desdouets, C. Santocanale, C. Drury, L. S. Perkins, G. Foiani, M. Plevani, P. Diffley, J. F. |
| Abstract | Eukaryotic DNA replication is limited to once per cell cycle because cyclin-dependent kinases (cdks), which are required to fire origins, also prevent re-replication. Components of the replication apparatus, therefore, are 'reset' by cdk inactivation at the end of mitosis. In budding yeast, assembly of Cdc6p-dependent pre-replicative complexes (pre-RCs) at origins can only occur during G1 because it is blocked by cdk1 (Cdc28) together with B cyclins (Clbs). Here we describe a second, separate process which is also blocked by Cdc28/Clb kinase and, therefore, can only occur during G1; the recruitment of DNA polymerase alpha-primase (pol alpha) to chromatin. The recruitment of pol alpha to chromatin during G1 is independent of pre-RC formation since it can occur in the absence of Cdc6 protein. Paradoxically, overproduction of Cdc6p can drive both dephosphorylation and chromatin association of pol alpha. Overproduction of a mutant in which the N-terminus of Cdc6 has been deleted is unable to drive pol alpha chromatin binding. Since this mutant is still competent for pre-RC formation and DNA replication, we suggest that Cdc6p overproduction resets pol alpha chromatin binding by a mechanism which is independent of that used in pre-RC assembly. |
| Related Links | http://dx.doi.org/10.1093/emboj/17.14.4139 |
| Ending Page | 4146 |
| Page Count | 8 |
| Starting Page | 4139 |
| File Format | |
| ISSN | 02614189 |
| e-ISSN | 14602075 |
| Journal | The EMBO Journal |
| Issue Number | 14 |
| Volume Number | 17 |
| Language | English |
| Publisher Date | 1998-07-15 |
| Access Restriction | Open |
| Subject Keyword | Biochemistry, Genetics and Molecular Biology(all) Immunology and Microbiology(all) Neuroscience(all) Molecular Biology Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Neuroscience Immunology and Microbiology Medicine Molecular Biology |
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