IL-4R Rabbit Polyclonal Antibody (HA500453)

UNIPROT #

P24394

PROTEIN NAME

IL-4R

SYNONYMS

CD124 antibody;IL 4R alpha antibody;IL-4 receptor subunit alpha antibody;IL-4-binding protein antibody;IL-4R subunit alpha antibody;IL-4R-alpha antibody;IL-4RA antibody;IL4-BP antibody;Il4r antibody;IL4R nirs variant 1 antibody;IL4RA antibody;IL4RA_HUMAN antibody;Interleukin 4 receptor alpha chain antibody;Interleukin 4 receptor antibody;sIL4Ralpha/prot antibody;Soluble IL-4 receptor subunit alpha antibody;Soluble IL-4R-alpha antibody;Soluble interleukin-4 receptor subunit alpha antibody

SUBCELLULAR LOCATION

Cell membrane; Secreted.

FUNCTION

This gene encodes the alpha chain of the interleukin-4 receptor, a type I transmembrane protein that can bind interleukin 4 and interleukin 13 to regulate IgE antibody production in B cells. Among T cells, the encoded protein also can bind interleukin 4 to promote differentiation of Th2 cells. A soluble form of the encoded protein can be produced by an alternate splice variant or by proteolysis of the membrane-bound protein, and this soluble form can inhibit IL4-mediated cell proliferation and IL5 upregulation by T-cells. Allelic variations in this gene have been associated with atopy, a condition that can manifest itself as allergic rhinitis, sinusitis, asthma, or eczema. Two transcript variants encoding different isoforms, a membrane-bound and a soluble form, have been found for this gene. Interactions of IL-4 with TNFα promote structural changes to vascular endothelial cells, thus playing an important role in tissue inflammation. The binding of IL-4 or IL-13 to the IL-4 receptor on the surface of macrophages results in the alternative activation of those macrophages. Alternatively activated macrophages (AAMΦ) downregulate inflammatory mediators such as IFNγ during immune responses, particularly with regards to helminth infections. IL4 signalling also determines the levels of CD20 on normal and malignant B cells by activation the transcription factor STAT6.