Predicted to enable protein phosphatase regulator activity. Predicted to act upstream of or within blastocyst hatching; negative regulation of phosphoprotein phosphatase activity; and regulation of protein serine/threonine phosphatase activity. Predicted to be located in cytosol. Predicted to be part of protein serine/threonine phosphatase complex. Orthologous to human PPP4R4 (protein phosphatase 4 regulatory subunit 4). [provided by Alliance of Genome Resources, Apr 2022]