Recombinant Human IL5RA/IL-5 Rα Protein (Fc Tag)

Interleukin-5 Receptor alpha (IL-5Rα; CD125) is a 60 kDa hematopoietin receptor that plays a dominant role in eosinophil biology. Mature human IL-5 Rα consists of a 322 aa extracellular domain (ECD) with a WSxWS motif and a four cysteine motif; a 20 aa transmembrane segment; and a 58 aa cytoplasmic domain. Within the ECD; human IL-5Rα shares 71% aa sequence identity with mouse and rat IL-5 Rα. Alternate splicing of human IL-5 Rα generates soluble secreted forms which function as IL-5 antagonists. The high affinity receptor for IL-5 is a complex that consists of the ligand binding IL-5 Rα and the transmembrane common β chain (βc/CD131) which is shared with the receptor complexes for IL-3 and GMCSF. IL-5 Rα binds IL-5 at low affinity and then associates with preformed βc oligomers to form the signaling competent receptor complex. IL-5 stimulation of CD34+ hematopoietic progenitor cells induces the up-regulation of transmembrane IL-5Rα followed by eosinophilic differentiation and activation.

CDw; HSIL5R; IL5RA; CD125; CDw125; HSIL5R3; IL5R; IL-5 receptor subunit alpha; IL-5R subunit alpha; IL-5RA; IL-5R-alpha; Interleukin-5 receptor subunit alpha; CDw125; IL-5Rα CD125 antigen; IL5R; Interleukin 5 Receptor alpha; Interleukin 5 Receptor alpha chain; Interleukin 5 receptor alpha subunit; Interleukin 5 receptor subunit alpha; Interleukin 5 receptor type 3; MGC26560

Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80°C. Reconstituted protein solution can be stored at 4-8°C for 2-7 days. Aliquots of reconstituted samples are stable at < -20°C for 3 months.