| Modification Notes |
Protein tyrosine phosphatases, or PTPs, are type I transmembrane proteins, membrane associated proteins or proteins localized in nuclei. Examples of transmembrane PTPs are LAR, PTPå, PTP∫, PTP©, PTP∂, PTPe, PTPΩ, PTP˚, PTPµ and PTPr. Transmembrane PTPs play diverse roles in a variety of cellular processes during development and in adult tissues. PTPr, also known as PTPRT, RPTPT or RPTPr, is a receptor-type PTP (RPTP) containing a transmembrane region, two intracellular tandem catalytic domains, an extracellular region with Ig-like and Fibronectin type III-like repeats and a MAM (meprin-A5 antigen-PTPµ) domain. RPTPs participate in neurite extension, signal transduction and cell adhesion. PTPr is expressed at high levels in the central nervous system of both developing and adult tissues. It interacts with a variety of proteins that function at intercellular adheren junctions and it specifically binds and dephosphorylates E-cadherin. |