Involved in negative regulation of ERK1 and ERK2 cascade; negative regulation of peptidyl-serine phosphorylation; and positive regulation of sodium ion transport. Acts upstream of or within positive regulation of sodium ion transmembrane transporter activity. Predicted to be located in cytoplasm and plasma membrane. Orthologous to human CNKSR3 (CNKSR family member 3). [provided by Alliance of Genome Resources, Apr 2022]