Dephosphorylation of Centrins by Protein Phosphatase 2C α and β

Thissen, Marie-Christin; Krieglstein, Josef; Wolfrum, Uwe; Klumpp, Susanne
January 2009
Biochemistry Research International;2009, p1
Academic Journal
In the present study, we identified protein phosphatases dephosphorylating centrins previously phosphorylated by protein kinase CK2. The following phosphatases known to be present in the retina were tested: PP1, PP2A, PP2B, PP2C, PP5, and alkaline phosphatase. PP2C α and β were capable of dephosphorylating P-Thr138-centrin1 most efficiently. PP2Cδ was inactive and the other retinal phosphatases also had much less or no effect. Similar results were observed for centrins 2 and 4. Centrin3 was not a substrate for CK2. The results suggest PP2C α and β to play a significant role in regulating the phosphorylation status of centrins in vivo.


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