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- W2029541844 abstract "Abstract The evolutionarily-conserved protein phosphatase 1 (PP1) plays a central role in dephosphorylation of phosphoproteins during the M phase of the cell cycle. We demonstrate here that the PP1 inhibitor inhibitor-2 protein (Inh-2) induces an M-phase arrest in Xenopus cycling egg extracts. Interestingly, the characteristics of this M-phase arrest are similar to those of mitogen-activated protein kinase (p42MAPK)-induced M-phase arrest. This prompted us to investigate whether Inh-2-induced M-phase arrest was dependent on activation of the p42MAPK pathway. We demonstrate here that MAPK activity is required for Inh-2-induced M-phase arrest, as inhibition of MAPK by PD98059 allowed cycling extracts to exit M phase, despite the presence of Inh-2. We next investigated whether Inh-2 phosphorylation by the MAPK pathway was required to induce an M-phase arrest. We discovered that while p90Rsk (a MAPK protein required for M-phase arrest) is able to phosphorylate Inh-2, this phosphorylation is not required for Inh-2 function. Overall, our results suggest a novel mechanism linking p42MAPK and PP1 pathways during M phase of the cell cycle." @default.
- W2029541844 created "2016-06-24" @default.
- W2029541844 creator A5017810225 @default.
- W2029541844 creator A5027970783 @default.
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- W2029541844 date "2011-01-01" @default.
- W2029541844 modified "2023-10-16" @default.
- W2029541844 title "Inhibitor-2 induced M-phase arrest in Xenopus cycling egg extracts is dependent on MAPK activation" @default.
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- W2029541844 doi "https://doi.org/10.2478/s11658-011-0030-z" @default.
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