Ultra-LEAF™ Purified anti-mouse CD155 (PVR) Antibody, CD155, A18179E,BioLegend,942104

CD155, also known as TAGE4 or NECL-5 (nectin-like molecule-5), was originally described as a poliovirus entry receptor (PVR) more than 30 years ago. CD155 is a 70 kD type I transmembrane glycoprotein that belongs to the nectin-related family of adhesion molecules within the immunoglobulin superfamily, defined by the presence of immunoglobulin domains V, a C1-like domain and a C2 domain in the extracellular region. CD155 binds several molecules including vitronectin, nectin-3, DNAM-1/CD226, CD96, and TIGIT. All bindings are mediated by the V-type domain and alternative splicing within this domain can modulate ligand binding. CD155 is highly expressed on tumor cells of epithelial and neuronal origin. Its enhanced expression in tumors contributes to the loss of contact inhibition leading to increased migration, however, tumor cell recognition and killing by NK cells are also enhanced via DNAM-1 or CD96 expressing NK cells. CD155 normally functions in the establishment of intercellular adherent junctions between epithelial cells. CD155 mediates NK cell adhesion and triggers NK cell effector functions by binding to CD96 and CD226. These interactions accumulates at the cell-cell contact site, leading to the formation of a mature immunological synapse between NK cell and target cells.