RCSB PDB - 4Y5V: Diabody 305 complex with EpoR (original) (raw)
Tuning Cytokine Receptor Signaling by Re-orienting Dimer Geometry with Surrogate Ligands.
[Moraga, I.](/search?q=citation.rcsb%5Fauthors:Moraga, I.), [Wernig, G.](/search?q=citation.rcsb%5Fauthors:Wernig, G.), [Wilmes, S.](/search?q=citation.rcsb%5Fauthors:Wilmes, S.), [Gryshkova, V.](/search?q=citation.rcsb%5Fauthors:Gryshkova, V.), [Richter, C.P.](/search?q=citation.rcsb%5Fauthors:Richter, C.P.), [Hong, W.J.](/search?q=citation.rcsb%5Fauthors:Hong, W.J.), [Sinha, R.](/search?q=citation.rcsb%5Fauthors:Sinha, R.), [Guo, F.](/search?q=citation.rcsb%5Fauthors:Guo, F.), [Fabionar, H.](/search?q=citation.rcsb%5Fauthors:Fabionar, H.), [Wehrman, T.S.](/search?q=citation.rcsb%5Fauthors:Wehrman, T.S.), [Krutzik, P.](/search?q=citation.rcsb%5Fauthors:Krutzik, P.), [Demharter, S.](/search?q=citation.rcsb%5Fauthors:Demharter, S.), [Plo, I.](/search?q=citation.rcsb%5Fauthors:Plo, I.), [Weissman, I.L.](/search?q=citation.rcsb%5Fauthors:Weissman, I.L.), [Minary, P.](/search?q=citation.rcsb%5Fauthors:Minary, P.), [Majeti, R.](/search?q=citation.rcsb%5Fauthors:Majeti, R.), [Constantinescu, S.N.](/search?q=citation.rcsb%5Fauthors:Constantinescu, S.N.), [Piehler, J.](/search?q=citation.rcsb%5Fauthors:Piehler, J.), [Garcia, K.C.](/search?q=citation.rcsb%5Fauthors:Garcia, K.C.)
(2015) Cell 160: 1196-1208
PubMed Abstract:
Most cell-surface receptors for cytokines and growth factors signal as dimers, but it is unclear whether remodeling receptor dimer topology is a viable strategy to "tune" signaling output. We utilized diabodies (DA) as surrogate ligands in a prototypical dimeric receptor-ligand system, the cytokine Erythropoietin (EPO) and its receptor (EpoR), to dimerize EpoR ectodomains in non-native architectures. Diabody-induced signaling amplitudes varied from full to minimal agonism, and structures of these DA/EpoR complexes differed in EpoR dimer orientation and proximity. Diabodies also elicited biased or differential activation of signaling pathways and gene expression profiles compared to EPO. Non-signaling diabodies inhibited proliferation of erythroid precursors from patients with a myeloproliferative neoplasm due to a constitutively active JAK2V617F mutation. Thus, intracellular oncogenic mutations causing ligand-independent receptor activation can be counteracted by extracellular ligands that re-orient receptors into inactive dimer topologies. This approach has broad applications for tuning signaling output for many dimeric receptor systems.
Organizational Affiliation:
Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA 94305-5345, USA; Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305-5345, USA.