title: Sevenspan transmembrane molecules: novel receptors involved in leukocyte adhesion.
abstract: CD97 is a member of a new subgroup of seven-span transmembrane (7-TM) molecules which belong to the secretin receptor superfamily. Different from other members of the secretin receptor family, these recently characterized molecules have extended extracellular regions comprising several EGF domains near the NH2 terminus. We recently demonstrated that the extracellular part of CD97 is involved in intercellular adhesion since it specifically binds to CD55 (decay accelerating factor), a regulatory protein of the complement cascade. To our knowledge this is the first demonstration of a cellular ligand for a 7-TM molecule.
authors.affiliation: Department of Clinical Viro Immunology, University of Amsterdam, Netherlands.
authors.forename: R A
authors.initials: RA
authors.lastname: van Lier
authors.forename: W
authors.initials: W
authors.lastname: Eichler
authors.forename: J
authors.initials: J
authors.lastname: Hamann
mesh_terms: D015703:Antigens, CD; D001665:Binding Sites; D018958:CD55 Antigens / Q000276:immunology; D002448:Cell Adhesion; D002462:Cell Membrane; D006801:Humans; D007962:Leukocytes / Q000276:immunology*; D008024:Ligands; D008562:Membrane Glycoproteins / Q000276:immunology*; D043562:Receptors, G-Protein-Coupled; D012633:Secretin / Q000276:immunology*
chemical_list: C095004:ADGRE5 protein, human; D015703:Antigens, CD; D018958:CD55 Antigens; D008024:Ligands; D008562:Membrane Glycoproteins; D043562:Receptors, G-Protein-Coupled; D012633:Secretin