Secreted tyrosine phosphatase that plays a critical role during infection as a bacterial effector protein that counteracts host defenses. Required for intramacrophage survival. H2O + O-phospho-L-tyrosyl-[protein] = L-tyrosyl-[protein] + phosphate Interacts with host CORO1A. Secreted intracellularly upon bacterial infection of macrophages. Phosophorylations at Tyr-122 and Tyr-123 are essential for phosphatase activity. Belongs to the low molecular weight phosphotyrosine protein phosphatase family.