Heterodimerization of the IL-2 receptor β- and γ-chain cytoplasmic domains is required for signalling

THE interaction of interleukin-2 (IL-2) and IL-2 receptors criti-cally regulates the T-cell immune response following antigen activation 1,2 . IL-2 can signal through high or intermediate affinity receptors which contain IL-2Rα (refs 3, 4) + β (refs5–8) + γ (ref. 9) or β + γ chains, respectively. IL...

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Veröffentlicht in:Nature (London) 1994-05, Vol.369 (6478), p.330-333
Hauptverfasser: Nakamura, Yoshlaki, Russell, Sarah M., Mess, Sarah A., Friedmann, Michael, Erdos, Michael, Francois, Christine, Jacques, Yannick, Adelstein, Stephen, Leonard, Warren J.
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container_end_page 333
container_issue 6478
container_start_page 330
container_title Nature (London)
container_volume 369
creator Nakamura, Yoshlaki
Russell, Sarah M.
Mess, Sarah A.
Friedmann, Michael
Erdos, Michael
Francois, Christine
Jacques, Yannick
Adelstein, Stephen
Leonard, Warren J.
description THE interaction of interleukin-2 (IL-2) and IL-2 receptors criti-cally regulates the T-cell immune response following antigen activation 1,2 . IL-2 can signal through high or intermediate affinity receptors which contain IL-2Rα (refs 3, 4) + β (refs5–8) + γ (ref. 9) or β + γ chains, respectively. IL-2Rγ is a common γ chain, γ c , also shared by the IL-7 (ref. 10) and IL-4 (refs 11,12) receptors, which when mutated results in X-linked severe combined immunodeficiency 13 . Using chimaeric receptor constructs together with monoclonal or bispecific antibodies we demonstrate here that IL-2 signalling requires ligand-induced extracellular-domain-mediated heterodimerization of the β- and γ c -chain cytoplasmic domains. Anti-I L-2Rα monoclonal antibodies trigger proliferation of cells transfected with chimaeric constructs in which the extracel-lular domains of IL-2Rβ and γ c are replaced by that of IL-2Rα. Other experiments using chimaeric constructs indicated that IL-2 binds monomerically and monovalently to IL-2Rα and that the β-transmembrane domain is not required for receptor chain inter-actions. Finally, we provide a method for mapping residues in the γ c cytoplasmic domain even in cells that constitutively express γ c .
doi_str_mv 10.1038/369330a0
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IL-2 can signal through high or intermediate affinity receptors which contain IL-2Rα (refs 3, 4) + β (refs5–8) + γ (ref. 9) or β + γ chains, respectively. IL-2Rγ is a common γ chain, γ c , also shared by the IL-7 (ref. 10) and IL-4 (refs 11,12) receptors, which when mutated results in X-linked severe combined immunodeficiency 13 . Using chimaeric receptor constructs together with monoclonal or bispecific antibodies we demonstrate here that IL-2 signalling requires ligand-induced extracellular-domain-mediated heterodimerization of the β- and γ c -chain cytoplasmic domains. Anti-I L-2Rα monoclonal antibodies trigger proliferation of cells transfected with chimaeric constructs in which the extracel-lular domains of IL-2Rβ and γ c are replaced by that of IL-2Rα. Other experiments using chimaeric constructs indicated that IL-2 binds monomerically and monovalently to IL-2Rα and that the β-transmembrane domain is not required for receptor chain inter-actions. 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IL-2 can signal through high or intermediate affinity receptors which contain IL-2Rα (refs 3, 4) + β (refs5–8) + γ (ref. 9) or β + γ chains, respectively. IL-2Rγ is a common γ chain, γ c , also shared by the IL-7 (ref. 10) and IL-4 (refs 11,12) receptors, which when mutated results in X-linked severe combined immunodeficiency 13 . Using chimaeric receptor constructs together with monoclonal or bispecific antibodies we demonstrate here that IL-2 signalling requires ligand-induced extracellular-domain-mediated heterodimerization of the β- and γ c -chain cytoplasmic domains. Anti-I L-2Rα monoclonal antibodies trigger proliferation of cells transfected with chimaeric constructs in which the extracel-lular domains of IL-2Rβ and γ c are replaced by that of IL-2Rα. Other experiments using chimaeric constructs indicated that IL-2 binds monomerically and monovalently to IL-2Rα and that the β-transmembrane domain is not required for receptor chain inter-actions. 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subjects Animals
Antibodies, Bispecific
Antibodies, Monoclonal
Biological and medical sciences
Biopolymers
Cell Division - immunology
Cell Line
Cell receptors
Cell structures and functions
Cellular biology
Cytoplasm - immunology
Fundamental and applied biological sciences. Psychology
Hormone receptors. Growth factor receptors. Cytokine receptors. Prostaglandin receptors
Humanities and Social Sciences
Humans
letter
Medical research
Mice
Molecular and cellular biology
multidisciplinary
Mutation
Receptors, Interleukin-2 - chemistry
Receptors, Interleukin-2 - physiology
Recombinant Fusion Proteins
Science
Science (multidisciplinary)
Signal Transduction - immunology
Structure-Activity Relationship
title Heterodimerization of the IL-2 receptor β- and γ-chain cytoplasmic domains is required for signalling
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