Acts as a receptor for urokinase plasminogen activator. Plays a role in localizing and promoting plasmin formation. Mediates the proteolysis-independent signal transduction activation effects of U-PA. It is subject to negative-feedback regulation by U-PA which cleaves it into an inactive form. Monomer (Probable). Interacts with MRC2. Interacts (via the UPAR/Ly6 domains) with SRPX2. Expressed in neurons of the rolandic area of the brain. Expressed in the brain. 3 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Motility/polarity/chemotaxis; Membrane protein, GPI anchor; Receptor, misc.
Cellular Component: endoplasmic reticulum membrane; extrinsic to membrane; endoplasmic reticulum lumen; integral to plasma membrane; integral to membrane; plasma membrane
Biological Process: fibrinolysis; cellular protein metabolic process; attachment of GPI anchor to protein; regulation of proteolysis; C-terminal protein lipidation; post-translational protein modification; blood coagulation; chemotaxis; signal transduction; cell motility
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.