The tumor suppressor CDKN3 controls mitosis

Grzegorz Nalepa, Jill Barnholtz-Sloan, Rikki Enzor, Dilip Dey, Ying He, Jeff R. Gehlhausen, Amalia S. Lehmann, Su Jung Park, Yanzhu Yang, Xianlin Yang, Shi Chen, Xiaowei Guan, Yanwen Chen, Jamie Renbarger, Feng Chun Yang, Luis F. Parada, Wade Clapp

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Mitosis is controlled by a network of kinases and phosphatases. We screened a library of small interfering RNAs against a genome-wide set of phosphatases to comprehensively evaluate the role of human phosphatases in mitosis. We found four candidate spindle checkpoint phosphatases, including the tumor suppressor CDKN3. We show that CDKN3 is essential for normal mitosis and G1/S transition. We demonstrate that subcellular localization of CDKN3 changes throughout the cell cycle. We show that CDKN3 dephosphorylates threonine-161 of CDC2 during mitotic exit and we visualize CDC2pThr-161 at kinetochores and centrosomes in early mitosis. We performed a phosphokinome-wide mass spectrometry screen to find effectors of the CDKN3-CDC2 signaling axis. We found that one of the identified downstream phosphotargets, CKβ phosphorylated at serine 209, localizes to mitotic centrosomes and controls the spindle checkpoint. Finally, we show that CDKN3 protein is down-regulated in brain tumors. Our findings indicate that CDKN3 controls mitosis through the CDC2 signaling axis. These results have implications for targeted anticancer therapeutics.

Original languageEnglish (US)
Pages (from-to)997-1012
Number of pages16
JournalJournal of Cell Biology
Volume201
Issue number7
DOIs
StatePublished - Jun 2013

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Mitosis
Phosphoric Monoester Hydrolases
Centrosome
Neoplasms
Kinetochores
Threonine
Brain Neoplasms
Serine
Small Interfering RNA
Mass Spectrometry
Cell Cycle
Phosphotransferases
Genome
Proteins
Therapeutics

ASJC Scopus subject areas

  • Cell Biology

Cite this

Nalepa, G., Barnholtz-Sloan, J., Enzor, R., Dey, D., He, Y., Gehlhausen, J. R., ... Clapp, W. (2013). The tumor suppressor CDKN3 controls mitosis. Journal of Cell Biology, 201(7), 997-1012. https://doi.org/10.1083/jcb.201205125

The tumor suppressor CDKN3 controls mitosis. / Nalepa, Grzegorz; Barnholtz-Sloan, Jill; Enzor, Rikki; Dey, Dilip; He, Ying; Gehlhausen, Jeff R.; Lehmann, Amalia S.; Park, Su Jung; Yang, Yanzhu; Yang, Xianlin; Chen, Shi; Guan, Xiaowei; Chen, Yanwen; Renbarger, Jamie; Yang, Feng Chun; Parada, Luis F.; Clapp, Wade.

In: Journal of Cell Biology, Vol. 201, No. 7, 06.2013, p. 997-1012.

Research output: Contribution to journalArticle

Nalepa, G, Barnholtz-Sloan, J, Enzor, R, Dey, D, He, Y, Gehlhausen, JR, Lehmann, AS, Park, SJ, Yang, Y, Yang, X, Chen, S, Guan, X, Chen, Y, Renbarger, J, Yang, FC, Parada, LF & Clapp, W 2013, 'The tumor suppressor CDKN3 controls mitosis', Journal of Cell Biology, vol. 201, no. 7, pp. 997-1012. https://doi.org/10.1083/jcb.201205125
Nalepa G, Barnholtz-Sloan J, Enzor R, Dey D, He Y, Gehlhausen JR et al. The tumor suppressor CDKN3 controls mitosis. Journal of Cell Biology. 2013 Jun;201(7):997-1012. https://doi.org/10.1083/jcb.201205125
Nalepa, Grzegorz ; Barnholtz-Sloan, Jill ; Enzor, Rikki ; Dey, Dilip ; He, Ying ; Gehlhausen, Jeff R. ; Lehmann, Amalia S. ; Park, Su Jung ; Yang, Yanzhu ; Yang, Xianlin ; Chen, Shi ; Guan, Xiaowei ; Chen, Yanwen ; Renbarger, Jamie ; Yang, Feng Chun ; Parada, Luis F. ; Clapp, Wade. / The tumor suppressor CDKN3 controls mitosis. In: Journal of Cell Biology. 2013 ; Vol. 201, No. 7. pp. 997-1012.
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