dc.contributor.authorKotoshiba, Shuhei
dc.contributor.authorGopinathan, Lakshmi
dc.contributor.authorPfeiffenberger, Elisabeth
dc.contributor.authorRahim, Anisa
dc.contributor.authorVardy, Leah Karen Anne
dc.contributor.authorNakayama, Keiko
dc.contributor.authorNakayama, Keiichi I.
dc.contributor.authorKaldis, Philipp
dc.identifier.citationKotoshiba, S., Gopinathan, L., Pfeiffenberger, E., Rahim, A., Vardy, L. A., Nakayama, K. I., et al. (2014). p27 is regulated independently of Skp2 in the absence of Cdk2. Biochimica et Biophysica Acta (BBA) - Molecular Cell Research, 1843(2), 436-445.en_US
dc.description.abstractCyclin-dependent kinase 2 (Cdk2) is dispensable for mitotic cell cycle progression and Cdk2 knockout mice are viable due to the compensatory functions of other Cdks. In order to assess the role of Cdk2 under limiting conditions, we used Skp2 knockout mice that exhibit increased levels of Cdk inhibitor, p27Kip1, which is able to inhibit Cdk2 and Cdk1. Knockdown of Cdk2 abrogated proliferation of Skp2−/− mouse embryonic fibroblasts, encouraging us to generate Cdk2−/−Skp2−/− double knockout mice. Cdk2−/−Skp2−/− double knockout mice are viable and display similar phenotypes as Cdk2−/− and Skp2−/− mice. Unexpectedly, fibroblasts generated from Cdk2−/−Skp2−/− double knockout mice proliferated at normal rates. The increased stability of p27 observed in Skp2−/− MEFs was not observed in Cdk2−/−Skp2−/− double knockout fibroblasts indicating that in the absence of Cdk2, p27 is regulated by Skp2-independent mechanisms. Ablation of other ubiquitin ligases for p27 such as KPC1, DDB1, and Pirh2 did not restore stability of p27 in Cdk2−/−Skp2−/− MEFs. Our findings point towards novel and alternate pathways for p27 regulation.en_US
dc.description.sponsorshipASTAR (Agency for Sci., Tech. and Research, S’pore)en_US
dc.format.extent10 p.en_US
dc.relation.ispartofseriesBiochimica et Biophysica Acta (BBA) - Molecular Cell Researchen_US
dc.rights© 2013 Elsevier B.V.en_US
dc.subjectCyclin-dependent kinaseen_US
dc.subjectKnockout miceen_US
dc.titlep27 is regulated independently of Skp2 in the absence of Cdk2en_US
dc.typeJournal Article
dc.contributor.schoolSchool of Biological Sciencesen_US

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