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Phosphoproteomic analysis of aurora kinase inhibition in monopolar cytokinesis

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Giese, Sven H.
Hu, Chi-Kuo
Renard, Bernhard Y.

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Cytokinesis is the last step of the cell cycle that requires coordinated activities of the microtubule c-ytoskeleton, actin cytoskeleton, and membrane compartments. Aurora B kinase is one of the master regulatory kinases that orchestrate multiple events during cytokinesis. To reveal targets of the Aurora B kinase, we combined quantitative mass spectrometry with chemical genetics. Using the quantitative proteomic approach, SILAC (stable isotope labeling with amino acids in cell culture), we analyzed the phosphoproteome of monopolar cytokinesis upon VX680- or AZD1152-mediated aurora kinase inhibition. In total, our analysis quantified over 20 000 phosphopeptides in response to the Aurora-B kinase inhibition; 246 unique phosphopeptides were significantly down-regulated and 74 were up-regulated. Our data provide a broad analysis of downstream effectors of Aurora kinase and offer insights into how Aurora kinase regulates cytokinesis.

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Amer Chemical Soc

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Biochemical research methods

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Journal of Proteome Research

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10.1021/acs.jproteome.5b00645

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