CoA synthase regulates mitotic fidelity via CBP-mediated acetylation.
The temporal activation of kinases and timely ubiquitin-mediated degradation is central to faithful mitosis. Here we present evidence that acetylation controlled by Coenzyme A synthase (COASY) and acetyltransferase CBP constitutes a novel mechanism that ensures faithful mitosis. We found that COASY knockdown triggers prolonged mitosis and multinucleation. Acetylome analysis reveals that COASY inactivation leads to hyper-acetylation of proteins associated with mitosis, including CBP and an Aurora A kinase activator, TPX2. During early mitosis, a transient CBP-mediated TPX2 acetylation is associated with TPX2 accumulation and Aurora A activation. The recruitment of COASY inhibits CBP-mediated TPX2 acetylation, promoting TPX2 degradation for mitotic exit. Consistently, we detected a stage-specific COASY-CBP-TPX2 association during mitosis. Remarkably, pharmacological and genetic inactivation of CBP effectively rescued the mitotic defects caused by COASY knockdown. Together, our findings uncover a novel mitotic regulation wherein COASY and CBP coordinate an acetylation network to enforce productive mitosis.
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Related Subject Headings
- Transferases
- Protein Binding
- Nuclear Proteins
- Mitosis
- Microtubule-Associated Proteins
- Humans
- Cell Line
- Cell Cycle Proteins
- CREB-Binding Protein
- Aurora Kinase A
Citation
Published In
DOI
EISSN
Publication Date
Volume
Issue
Start / End Page
Location
Related Subject Headings
- Transferases
- Protein Binding
- Nuclear Proteins
- Mitosis
- Microtubule-Associated Proteins
- Humans
- Cell Line
- Cell Cycle Proteins
- CREB-Binding Protein
- Aurora Kinase A