NCIt definition : CD97 antigen (835 aa, 92 kDa) is encoded by the human ADGRE5 gene. This protein plays
a role in G protein-coupled receptor signaling, cell adhesion and leukocyte migration.;
NCIt note : CD97 Antigen, encoded by the CD97 gene, is a founding member of the EGF-TM7 family
of class II seven-span transmembrane (7-TM) molecules. CD97 Antigen is a glycoprotein
present on the surface of most activated leukocytes and is a G protein-coupled receptor.
This protein has an extended extracellular region with several N-terminal epidermal
growth factor (EGF)-like domains, which mediate binding to its cellular ligand, decay
accelerating factor (DAF, CD55), a regulatory protein of the complement cascade. The
presence of structural features characteristic of extracellular matrix proteins and
transmembrane proteins suggests that this protein is a receptor involved in both cell
adhesion and signaling processes early after leukocyte activation. Alternative splicing
generates two variants. CD97 Antigen has large N-terminal domain with five epidermal
growth factor-like sequences which are differentially spliced.;