Aurora A and Centrin Interaction in Cell Division
Author Information
Author(s): Kara B. Lukasiewicz, Tammy M. Greenwood, Vivian C. Negron, Amy K. Bruzek, Jeffrey L. Salisbury, Wilma L. Lingle
Primary Institution: Mayo Clinic, Rochester, Minnesota, United States of America
Hypothesis
Posttranslational centrin modifications driven by Aurora A regulate its stability and abundance.
Conclusion
Aurora A regulates the stability of centrin, and excess phosphorylated centrin may promote centrosome amplification in cancer.
Supporting Evidence
- Aurora A and phospho-centrin localize at the centrosome during mitosis.
- Phosphorylation of centrin at serine 170 is necessary for its stability.
- Cells expressing a centrin mutant that mimics phosphorylation show increased stability and centrosome amplification.
- Over-expression of Aurora A leads to centrosome amplification.
- Phospho-centrin levels are highest during prophase and metaphase.
Takeaway
Aurora A helps keep centrin stable during cell division, and when centrin is too stable, it can lead to problems like extra centrosomes, which are often seen in cancer.
Methodology
The study used immunofluorescence confocal microscopy, Western blotting, and in vitro kinase assays to analyze the interaction between Aurora A and centrin.
Limitations
The study primarily focused on HeLa cells, which may not fully represent other cell types.
Statistical Information
P-Value
p<0.027
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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