Tyrosine protein phosphatase which is involved in integrin-mediated focal adhesion formation (By similarity). Following integrin engagement, specifically recruits BCAR3, BCAR1 and CRK to focal adhesions thereby promoting SRC-mediated phosphorylation of BRAC1 and the subsequent activation of PAK and small GTPase RAC1 and CDC42 (By similarity). H2O + O-phospho-L-tyrosyl-[protein] = L-tyrosyl-[protein] + phosphate Part of a complex comprised of PTPRA, BCAR1, BCAR3 (via SH2 domain), and SRC (By similarity). Within the complex, interacts (when phosphorylated on Tyr-792) with BCAR3 (via SH2 domain) (By similarity). Interacts with GRB2 (By similarity). Localizes to focal adhesion sites following integrin engagement. Integrin binding to extracellular matrix induces phosphorylation at Tyr-792 which induces PTPRA localization and recruitment of BCAR3, BCAR1 and CRK to focal adhesions. Belongs to the protein-tyrosine phosphatase family. Receptor class 4 subfamily.