Enables protein tyrosine phosphatase activity. Acts upstream of or within protein dephosphorylation. Located in several cellular components, including dendrite; neuronal cell body; and photoreceptor outer segment. Is expressed in several structures, including alimentary system; central nervous system; respiratory system; sensory organ; and vibrissa. Orthologous to human PTPRK (protein tyrosine phosphatase receptor type K). [provided by Alliance of Genome Resources, Apr 2022]