1. Triple deletion ofTP53, PCNT, andCEP215promotes centriole amplification in the M phase
- Author
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Kunsoo Rhee and Gee In Jung
- Subjects
Centriole ,Mitosis ,Cell Cycle Proteins ,Nerve Tissue Proteins ,Biology ,Gene Knockout Techniques ,PCNT ,Humans ,Antigens ,Molecular Biology ,Centrioles ,Pericentriolar material ,Cell Biology ,Cell biology ,Centrosome ,Interphase ,CEP135 ,Tumor Suppressor Protein p53 ,Cell Division ,Gene Deletion ,Research Paper ,HeLa Cells ,Signal Transduction ,Developmental Biology ,Centriole assembly - Abstract
Supernumerary centrioles are frequently observed in diverse types of cancer cells. In this study, we investigated the mechanism underlying the generation of supernumerary centrioles during the M phase. We generated the TP53;PCNT;CEP215 triple knockout (KO) cells and determined the configurations of the centriole during the cell cycle. The triple KO cells exhibited a precocious separation of centrioles and unscheduled centriole assembly in the M phase. Supernumerary centrioles in the triple KO cells were present throughout the cell cycle; however, among all the centrioles, only two maintained an intact composition, including CEP135, CEP192, CEP295 and CEP152. Intact centrioles were formed during the S phase and the rest of the centrioles may be generated during the M phase. M-phase-assembled centrioles lacked the ability to organize microtubules in the interphase; however, a fraction of them may acquire pericentriolar material to organize microtubules during the M phase. Taken together, our work reveals the heterogeneity of the supernumerary centrioles in the triple KO cells. .
- Published
- 2021