title: Cloning and characterization of a binding subunit of the interleukin 13 receptor that is also a component of the interleukin 4 receptor.
abstract: Interleukins 4 (IL-4) and 13 (IL-13) have been found previously to share receptor components on some cells, as revealed by receptor cross-competition studies. In the present study, the cloning is described of murine NR4, a previously unrecognized receptor identified on the basis of sequence similarity with members of the hemopoietin receptor family. mRNA encoding NR4 was found in a wide range of murine cells and tissues. By using transient expression in COS-7 cells, NR4 was found to encode the IL-13 receptor alpha chain, a low-affinity receptor capable of binding IL-13 but not IL-4 or interleukins 2, -7, -9, or -15. Stable expression of the IL-13 receptor alpha chain (NR4) in CTLL-2 cells resulted in the generation of high-affinity IL-13 receptors capable of transducing a proliferative signal in response to IL-13 and, moreover, led to competitive cross-reactivity in the binding of IL-4 and IL-13. These results suggest that the IL-13 receptor alpha chain (NR4) is the primary binding subunit of the IL-13 receptor and may also be a component of IL-4 receptors.
authors.affiliation: Walter and Eliza Hall Institute of Medical Research, Royal Melbourne Hospital, Victoria, Australia.
authors.forename: D J
authors.initials: DJ
authors.lastname: Hilton
authors.forename: J G
authors.initials: JG
authors.lastname: Zhang
authors.forename: D
authors.initials: D
authors.lastname: Metcalf
authors.forename: W S
authors.initials: WS
authors.lastname: Alexander
authors.forename: N A
authors.initials: NA
authors.lastname: Nicola
authors.forename: T A
authors.initials: TA
authors.lastname: Willson
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D015703:Antigens, CD / Q000737:chemistry* / Q000235:genetics; D001483:Base Sequence; D002455:Cell Division; D002478:Cells, Cultured; D018076:DNA, Complementary / Q000235:genetics; D005796:Genes; D018793:Interleukin-13 / Q000378:metabolism; D053661:Interleukin-13 Receptor alpha1 Subunit; D015847:Interleukin-4 / Q000378:metabolism; D051379:Mice; D008969:Molecular Sequence Data; D018123:Receptors, Interleukin / Q000737:chemistry* / Q000235:genetics* / Q000378:metabolism; D053660:Receptors, Interleukin-13; D019948:Receptors, Interleukin-4; D011994:Recombinant Proteins / Q000378:metabolism; D014162:Transfection
chemical_list: D015703:Antigens, CD; D018076:DNA, Complementary; C508183:Il13ra1 protein, mouse; D018793:Interleukin-13; D053661:Interleukin-13 Receptor alpha1 Subunit; D018123:Receptors, Interleukin; D053660:Receptors, Interleukin-13; D019948:Receptors, Interleukin-4; D011994:Recombinant Proteins; D015847:Interleukin-4