Receptor-type protein tyrosine phosphatase R (PTPRR)

Receptor-type protein tyrosine phosphatase R (PTPRR) is a member of the classical protein tyrosine phosphatase family, functioning as an enzyme that removes phosphate groups from tyrosine residues on target proteins[1]. PTPRR is expressed in neuronal tissues and exists as multiple isoforms, including both receptor-type (transmembrane) and cytosolic forms[1]. It contains a kinase interaction motif (KIM), allowing it to interact with and inactivate mitogen-activated protein kinases (MAPKs), specifically ERK1/2/5 and p38, thus controlling their activity and preventing nuclear translocation[1]. PTPRR is involved in regulating neuronal development, endocytic trafficking, and fine-tuning signal transduction within the nervous system. Deficiency in PTPRR leads to defects in motor coordination without causing gross cerebellar morphological abnormalities, suggesting a critical role in signaling pathways that support precise neuronal functioning[1]. While protein tyrosine phosphatases, including PTPRR, have been implicated in diverse diseases such as neurodegeneration and cancer, PTPRR’s most well-described role centers on neuronal regulation and motor control[1][3].

Other names

PTPRRReceptor-type tyrosine-protein phosphatase RPTPBR7PTP-SLECPTPPCPTP1Ch-1PTPaseNC-PTPCOM1Cr1PTPase

For the protein tyrosine phosphatase family: inhibitors typically act by blocking enzymatic dephosphorylation activity and thereby modulating downstream signaling