GM-CSF/IL-3/IL-5 receptor common beta subunit (IL3RB) is a cell surface receptor that plays a role in immune response and controls the production and differentiation of haematopoietic progenitor cells into lineage-restricted cells. It participates in the signaling pathways of interleukin-3, interleukin-5 and granulocyte-macrophage colony-stimulating factor/CSF2 which have overlapping activities on haematopoietic cells [1-4] and have been implicated in the pathogenesis of allergic diseases of the lung. IL3RB consists of four extracellular domains with an Ig-like fold. This entry represents the first domain.

1: Structure of the complete extracellular domain of the common beta subunit of the human GM-CSF, IL-3, and IL-5 receptors reveals a novel dimer configuration. Carr PD, Gustin SE, Church AP, Murphy JM, Ford SC, Mann DA, Woltring DM, Walker I, Ollis DL, Young IG; Cell. 2001;104:291-300. PMID:11207369

2: Conformational Changes in the GM-CSF Receptor Suggest a Molecular Mechanism for Affinity Conversion and Receptor Signaling. Broughton SE, Hercus TR, Nero TL, Dottore M, McClure BJ, Dhagat U, Taing H, Gorman MA, King-Scott J, Lopez AF, Parker MW; Structure. 2016;24:1271-1281. PMID:27396825

3: Crystal structure of the mouse interleukin-3 beta-receptor: insights into interleukin-3 binding and receptor activation. Carr PD, Ewens CL, Dai J, Ollis DL, Murphy JM, Jackson CJ, Young IG; Biochem J. 2014;463:393-403. PMID:25137390

4: CSL311, a novel, potent, therapeutic monoclonal antibody for the treatment of diseases mediated by the common beta chain of the IL-3, GM-CSF and IL-5 receptors. Panousis C, Dhagat U, Edwards KM, Rayzman V, Hardy MP, Braley H, Gauvreau GM, Hercus TR, Smith S, Sehmi R, McMillan L, Dottore M, McClure BJ, Fabri LJ, Vairo G, Lopez AF, Parker MW, Nash AD, Wilson NJ, Wilson MJ, Owczarek CM; MAbs. 2016;8:436-453. PMID:26651396