Predicted to enable transmembrane receptor protein tyrosine phosphatase activity. Predicted to be involved in axon guidance and signal transduction. Is expressed in several structures, including adult head; embryonic/larval epidermis; embryonic/larval fat body; larval peripheral nervous system; and larval ventral nerve cord. Human ortholog(s) of this gene implicated in colorectal cancer and esophagus squamous cell carcinoma. Orthologous to human PTPRK (protein tyrosine phosphatase receptor type K); PTPRM (protein tyrosine phosphatase receptor type M); and PTPRT (protein tyrosine phosphatase receptor type T).