Component of the epithelial apical junction complex that may function as a homophilic cell adhesion molecule and is essential for tight junction integrity. Also involved in transepithelial migration of leukocytes through adhesive interactions with JAML a transmembrane protein of the plasma membrane of leukocytes. The interaction between both receptors also mediates the activation of gamma-delta T-cells, a subpopulation of T-cells residing in epithelia and involved in tissue homeostasis and repair. Upon epithelial CXADR-binding, JAML induces downstream cell signaling events in gamma-delta T-cells through PI3-kinase and MAP kinases. It results in proliferation and production of cytokines and growth factors by T-cells that in turn stimulate epithelial tissues repair.
(Microbial infection) Acts as a receptor for adenovirus type C.
(Microbial infection) Acts as a receptor for Coxsackievirus B1 to B6.
Subcellular locations: Cell membrane, Basolateral cell membrane, Cell junction, Tight junction, Cell junction, Adherens junction
In epithelial cells localizes to the apical junction complex composed of tight and adherens junctions . In airway epithelial cells localized to basolateral membrane but not to apical surface .
Subcellular locations: Secreted
Subcellular locations: Secreted
Subcellular locations: Secreted
Expressed in pancreas, brain, heart, small intestine, testis, prostate and at a lower level in liver and lung. Isoform 5 is ubiquitously expressed. Isoform 3 is expressed in heart, lung and pancreas. In skeletal muscle, isoform 1 is found at the neuromuscular junction and isoform 2 is found in blood vessels. In cardiac muscle, isoform 1 and isoform 2 are found at intercalated disks. In heart expressed in subendothelial layers of the vessel wall but not in the luminal endothelial surface. Expression is elevated in hearts with dilated cardiomyopathy.