Protein phosphatase that dephosphorylates PrkC and EF-G (elongation factor G, fusA). prpC and prkC are cotranscribed, which suggests that they form a functional couple in vivo, PrpC's primary role being possibly to counter the action of PrkC. May be involved in sporulation and biofilm formation. Does not seem to be involved in stress response. Dephosphorylates phosphorylated CgsA, EF-Tu and YezB (PubMed:19246764). H2O + O-phospho-L-seryl-[protein] = L-seryl-[protein] + phosphate H2O + O-phospho-L-threonyl-[protein] = L-threonyl-[protein] + phosphate Binds 2 manganese ions per subunit.