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- W2017206245 abstract "PRIP, phospholipase C (PLC)-related but catalytically inactive protein is a protein with a domain organization similar to PLC-δ1. We have reported that PRIP interacts with the catalytic subunits of protein phosphatase 1 and 2A (PP1c and PP2Ac), depending on the phosphorylation of PRIP. We also found that Akt was precipitated along with PRIP by anti-PRIP antibody from neuronal cells. In this article, we summarize our current reach regarding the interaction of PRIP with Akt and protein phosphatases, in relation to the cellular phospho-regulations. PP1 and PP2A are major members of the protein serine/threonine phosphatase families. We have identified PP1 and PP2A as interacting partners of PRIP. We first investigated the interaction of PRIP with two phosphatases, using purified recombinant proteins. PRIP immobilized on beads pulled-down the catalytic subunits of both PP1 and PP2A, indicating that the interactions were in a direct manner, and the binding of PP1 and PP2A to PRIP were mutually exclusive. Site-directed mutagenesis experiments revealed that the binding sites for PP1 and PP2A on PRIP were not identical, but in close proximity. Phosphorylation of PRIP by protein kinase A (PKA) resulted in the reduced binding of PP1, but not PP2A. Rather, the dissociation of PP1 from PRIP by phosphorylation accompanied the increased binding of PP2A in in vitro experiments. This binding regulation of PP1 and PP2A to PRIP by PKA-dependent phosphorylation was also observed in living cells treated with forskolin or isoproterenol. These results suggested that PRIP directly interacts with the catalytic subunits of two distinct phosphatases in a mutually exclusive manner and the interactions are regulated by phosphorylation, thus functioning as a scaffold to regulate the activities and subcellular localizations of both PP1 and PP2A in phospho-dependent cellular signaling." @default.
- W2017206245 created "2016-06-24" @default.
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- W2017206245 date "2013-09-01" @default.
- W2017206245 modified "2023-10-17" @default.
- W2017206245 title "Phospholipase C-related but catalytically inactive protein, PRIP as a scaffolding protein for phospho-regulation" @default.
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- W2017206245 doi "https://doi.org/10.1016/j.jbior.2013.07.001" @default.
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