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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Oh, Seeun Cook, Jeanette Gowen Varma, Dileep Rizzardi, Lindsay F. Coleman, Kate E. Matson, Jacob P. |
| Description | Author Affiliation: Rizzardi LF ( From the Curriculum in Genetics and Molecular Biology and.); Coleman KE ( From the Curriculum in Genetics and Molecular Biology and.); Varma D ( the Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, North Carolina 27599.); Matson JP ( the Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, North Carolina 27599.); Oh S ( the Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, North Carolina 27599.); Cook JG ( From the Curriculum in Genetics and Molecular Biology and the Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, North Carolina 27599 jgcook@email.unc.edu.) |
| Abstract | Replication-coupled destruction of a cohort of cell cycle proteins ensures efficient and precise genome duplication. Three proteins destroyed during replication via the CRL4(CDT2) ubiquitin E3 ligase, CDT1, p21, and SET8 (PR-SET7), are also essential or important during mitosis, making their reaccumulation after S phase a critical cell cycle event. During early and mid-S phase and during DNA repair, proliferating cell nuclear antigen (PCNA) loading onto DNA (PCNA(DNA)) triggers the interaction between CRL4(CDT2) and its substrates, resulting in their degradation. We have discovered that, beginning in late S phase, PCNA(DNA) is no longer sufficient to trigger CRL4(CDT2)-mediated degradation. A CDK1-dependent mechanism that blocks CRL4(CDT2) activity by interfering with CDT2 recruitment to chromatin actively protects CRL4(CDT2) substrates. We postulate that deliberate override of replication-coupled destruction allows anticipatory accumulation in late S phase. We further show that (as for CDT1) de novo SET8 reaccumulation is important for normal mitotic progression. In this manner, CDK1-dependent CRL4(CDT2) inactivation contributes to efficient transition from S phase to mitosis. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 1 |
| Volume Number | 290 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2015-01-02 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Chromatin Metabolism Cyclin-Dependent Kinases Genetics Mitosis Nuclear Proteins S Phase Ubiquitin-Protein Ligases Cell Cycle Proteins Chemistry Cyclin-Dependent Kinase Inhibitor P21 Gene Expression Regulation HCT116 Cells HEK293 Cells HeLa Cells Histone-Lysine N-Methyltransferase Proliferating Cell Nuclear Antigen Proteolysis Signal Transduction Ubiquitination Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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