title: A human high affinity interleukin-5 receptor (IL5R) is composed of an IL5-specific alpha chain and a beta chain shared with the receptor for GM-CSF.
abstract: cDNA clones encoding two receptor proteins involved in the binding of human interleukin 5 (hIL5) have been isolated. A first class codes for an IL5-specific chain (hIL5R alpha). The major transcript of this receptor gene, as analyzed in both HL-60 eosinophilic cells and eosinophilic myelocytes grown from cord blood, encodes a secreted form of this receptor. This soluble hIL5R alpha has antagonistic properties. A second component of the hIL5R is found to be identical to the beta chain of the human granulocyte-macrophage colony-stimulating factor (GM-CSF) high affinity receptor. The finding that IL5 and GM-CSF share a receptor subunit provides a molecular basis for the observation that these cytokines can partially interfere with each other's binding and have highly overlapping biological activities on eosinophils.
authors.affiliation: Roche Research Gent, Belgium.
authors.forename: J
authors.initials: J
authors.lastname: Tavernier
authors.forename: R
authors.initials: R
authors.lastname: Devos
authors.forename: S
authors.initials: S
authors.lastname: Cornelis
authors.forename: T
authors.initials: T
authors.lastname: Tuypens
authors.forename: J
authors.initials: J
authors.lastname: Van der Heyden
authors.forename: W
authors.initials: W
authors.lastname: Fiers
authors.forename: G
authors.initials: G
authors.lastname: Plaetinck
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D001667:Binding, Competitive; D015152:Blotting, Northern; D002455:Cell Division; D002460:Cell Line; D003001:Cloning, Molecular; D003432:Cross-Linking Reagents; D004247:DNA / Q000235:genetics; D015870:Gene Expression; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000378:metabolism; D006801:Humans; D066298:In Vitro Techniques; D015848:Interleukin-5 / Q000378:metabolism; D046911:Macromolecular Substances; D008969:Molecular Sequence Data; D015394:Molecular Structure; D009841:Oligonucleotides / Q000737:chemistry; D012333:RNA, Messenger / Q000235:genetics; D016187:Receptors, Granulocyte-Macrophage Colony-Stimulating Factor / Q000737:chemistry*; D011971:Receptors, Immunologic / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D018123:Receptors, Interleukin; D053649:Receptors, Interleukin-5; D011994:Recombinant Proteins
chemical_list: D003432:Cross-Linking Reagents; D015848:Interleukin-5; D046911:Macromolecular Substances; D009841:Oligonucleotides; D012333:RNA, Messenger; D016187:Receptors, Granulocyte-Macrophage Colony-Stimulating Factor; D011971:Receptors, Immunologic; D018123:Receptors, Interleukin; D053649:Receptors, Interleukin-5; D011994:Recombinant Proteins; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D004247:DNA