Prion-like membrane-associated phosphatase (PubMed:31491385). Phosphatase activity depends on amyloid-like assembly at the membrane (PubMed:31491385). Might have a role in establishment of segment polarity in embryos (PubMed:31491385). H2O + O-phospho-L-seryl-[protein] = L-seryl-[protein] + phosphate Phosphatase activity requires amyloid-like aggregation on the membrane. Monomer (PubMed:31491385). Forms higher-order protein aggregates with amyloid-like features during gastrulation (PubMed:31491385). Interacts with babo, dah, Irk1, pch2, Ras64B, sax and Src64B (PubMed:31491385). During embryonic development shows diffuse localization between stages 1-5 and then shows foci formation at the cell membrane that persist till later stages. Expressed ubiquitously throughout embryonic development (at protein level).