CEP192 localises mitotic Aurora-A activity by priming its interaction with TPX2
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View abstract on PubMed
Summary
This summary is machine-generated.CEP192 binding regulates the cell-cycle kinase Aurora-A localization and activity. This complex is crucial for proper spindle assembly and maintaining genome integrity during mitosis.
Area Of Science
- Cell Biology
- Molecular Biology
- Biochemistry
Background
- Aurora-A is a key cell-cycle kinase vital for mitosis and spindle dynamics.
- Its functions depend on binding partners like CEP192 and TPX2, which control its activity and location.
Purpose Of The Study
- To investigate the structural and functional roles of the centrosomal Aurora-A:CEP192 complex.
- To understand its place within the broader molecular network governing cell division.
Main Methods
- Structural analysis of the Aurora-A:CEP192 complex.
- Investigated the impact of CEP192 binding on Aurora-A conformations and activity.
- Utilized deletion mutants to assess the functional consequences of disrupted binding.
Main Results
- CEP192 directly binds Aurora-A, occupying sites for spindle-associated partners and competing with them.
- CEP192 binding alters Aurora-A conformation, affecting TPX2-mediated activation.
- Deletion of the CEP192 binding interface impairs Aurora-A centrosomal accumulation, reduces its phosphorylation, and leads to mitotic errors.
Conclusions
- The CEP192:Aurora-A complex is essential for regulating spindle function by providing phosphorylated Aurora-A for TPX2 binding.
- A conserved spatial hierarchy involving CEP192 fine-tunes Aurora-A activity, ensuring genome integrity.
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