Localization of the ubiquitin ligase Dma1 to the fission yeast contractile ring is modulated by phosphorylation
| Autor: | Alyssa E. Johnson, Kathleen L. Gould, Maya G. Igarashi, Liping Ren, Christine M. Jones, Jun-Song Chen |
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| Rok vydání: | 2021 |
| Předmět: |
biology
Chemistry Biophysics Cell Cycle Proteins Cell Biology Biochemistry Article Spindle pole body Yeast Ubiquitin ligase Cell biology Protein Transport Spindle Pole Bodies Structural Biology Schizosaccharomyces Genetics biology.protein Phosphorylation Schizosaccharomyces pombe Proteins Protein kinase A Molecular Biology Mitosis Function (biology) Cytokinesis |
| Zdroj: | FEBS Lett |
| ISSN: | 1873-3468 0014-5793 |
| Popis: | The timing of cytokinesis relative to other mitotic events in the fission yeast Schizosaccharomyces pombe is controlled by the septation initiation network (SIN). During a mitotic checkpoint, the SIN is inhibited by the E3 ubiquitin ligase Dma1 to prevent chromosome mis-segregation. Dma1 dynamically localizes to spindle pole bodies (SPBs) and the contractile ring (CR) during mitosis though its role at the CR is unknown. Here, we examined whether Dma1 phosphorylation affects its localization or function. We found that preventing Dma1 phosphorylation by substituting the six phosphosites with alanines diminished Dma1 CR localization but did not affect its mitotic checkpoint function. These studies reinforce the conclusion that Dma1 localization to the SPB is key to its role in the mitotic checkpoint. |
| Databáze: | OpenAIRE |
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