The PTPRCAP gene (PTPRCAP stands for "Protein Tyrosine Phosphatase Receptor Type C Associated Protein") is a protein coding gene. located on chromosome 11q13.2.
The protein encoded by this gene is a transmembrane phosphoprotein specifically associated with the tyrosine phosphatase PTPRC/CD45, an important regulator of T and B lymphocyte activation. Interaction with PTPRC is thought to be required for stable expression of this protein.