title: Identification, cloning, and regulation of a novel endothelial cell protein C/activated protein C receptor.
abstract: Human protein C and activated protein C are shown to bind to endothelium specifically, selectively and saturably (Kd = 30 nM, 7000 sites per cell) in a Ca(2+)-dependent fashion. Expression cloning revealed a 1.3-kilobase pair cDNA that coded for a novel type 1 transmembrane glycoprotein capable of binding protein C. This protein appears to be a member of the CD1/major histocompatibility complex superfamily. Like thrombomodulin, the receptor involved in protein C activation, the endothelial cell protein C receptor function and message are both down-regulated by exposure of endothelium to tumor necrosis factor. Identification of endothelial cell protein C receptor as a member of the CD1/major histocompatibility complex superfamily provides insights into the role of protein C in regulating the inflammatory response.
authors.affiliation: Howard Hughes Medical Institute, Oklahoma City, Oklahoma.
authors.forename: K
authors.initials: K
authors.lastname: Fukudome
authors.forename: C T
authors.initials: CT
authors.lastname: Esmon
mesh_terms: D000595:Amino Acid Sequence; D015703:Antigens, CD; D001483:Base Sequence; D002478:Cells, Cultured; D003001:Cloning, Molecular; D000074283:Endothelial Protein C Receptor; D004730:Endothelium, Vascular / Q000378:metabolism*; D006023:Glycoproteins / Q000737:chemistry; D006801:Humans; D008969:Molecular Sequence Data; D011486:Protein C / Q000378:metabolism*; D012333:RNA, Messenger / Q000032:analysis; D011956:Receptors, Cell Surface / Q000032:analysis* / Q000235:genetics; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology
chemical_list: D015703:Antigens, CD; D000074283:Endothelial Protein C Receptor; D006023:Glycoproteins; C478370:PROCR protein, human; D011486:Protein C; D012333:RNA, Messenger; D011956:Receptors, Cell Surface; D014409:Tumor Necrosis Factor-alpha