A non-specific tyrosine phosphatase that dephosphorylates a diverse number of substrates under acidic conditions (pH 4-6) including alkyl, aryl, and acyl orthophosphate monoesters and phosphorylated proteins. Has lipid phosphatase activity and inactivates lysophosphatidic acid in seminal plasma. In addition to its tyrosine phosphatase activity, also has ecto-5'-nucleotidase activity in dorsal root ganglion (DRG) neurons. Generates adenosine from AMP. This extracellular adenosine leads to a decrease in chronic pain by activating A1R in nociceptive neurons. a phosphate monoester + H2O = an alcohol + phosphate a ribonucleoside 5'-phosphate + H2O = a ribonucleoside + phosphate 1-(9Z-octadecenoyl)-sn-glycero-3-phosphate + H2O = 1-(9Z-octadecenoyl)-sn-glycerol + phosphate H2O + O-phospho-L-tyrosyl-[protein] = L-tyrosyl-[protein] + phosphate Inhibited by L(+)-tartrate. Homodimer; dimer formation is required for phosphatase activity. Appears to shuttle between the cell membrane and intracellular vesicles. Colocalizes with FLOT1 at cell membrane and in intracellular vesicles. Colocalizes with LAMP2 on the lysosome membrane. Expressed in prostate epithelium. Also expressed in the pelvic nerve and sacral spinal cord. Localizes in peptidergic and non-peptidergic nociceptive (pain-sensing) neurons. N-glycosylated. Belongs to the histidine acid phosphatase family.