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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Machida, Yuichi J. Dutta, Anindya |
| Description | Country affiliation: United States Author Affiliation: Machida YJ ( Department of Biochemistry and Molecular Genetics, University of Virginia School of Medicine, Charlottesville, Virginia 22908, USA.) |
| Abstract | Emi1 (early mitotic inhibitor) inhibits APC/C (anaphase-promoting complex/cyclosome) activity during S and G2 phases, and is believed to be required for proper mitotic entry. We report that Emi1 plays an essential function in cell proliferation by preventing rereplication. Rereplication seen after Emi1 depletion is due to premature activation of APC/C that results in destabilization of geminin and cyclin A, two proteins shown here to play redundant roles in preventing rereplication in mammalian cells. Geminin is known to inhibit the replication initiation factor Cdt1. The rereplication block by cyclin A is mediated through its association with S and G2/M cyclin-dependent kinases (Cdks), Cdk2 and Cdk1, suggesting that phosphorylation of proteins by cyclin A-Cdk is responsible for the block. Rereplication upon Emi1 depletion activates the DNA damage checkpoint pathways. These data suggest that Emi1 plays a critical role in preserving genome integrity by blocking rereplication, revealing a previously unrecognized function of this inhibitor of APC/C. |
| File Format | HTM / HTML |
| ISSN | 08909369 |
| e-ISSN | 15495477 |
| Journal | Genes & Development |
| Issue Number | 2 |
| Volume Number | 21 |
| Language | English |
| Publisher | Cold Spring Harbor Laboratory Press |
| Publisher Date | 2007-01-15 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Discipline Molecular Discipline Biology__semicolon__developmental Discipline Biology__semicolon__genetics__semicolon__cell Discipline Biology Cell Cycle Proteins Metabolism Dna Replication F-box Proteins Anaphase-promoting Complex-cyclosome Animals Cdc2 Protein Kinase Cell Cycle Cyclin A Cyclin A2 Cyclin-dependent Kinase 2 Geminin Hela Cells Mitosis Phosphorylation Rna Interference Ubiquitin-protein Ligase Complexes Antagonists & Inhibitors Research Support, N.i.h., Extramural |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Developmental Biology |
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