Domain:The box 1 motif is required for JAK interaction and/or activation. ,Domain:The WSXWS motif appears to be necessary for proper protein folding and thereby efficient intracellular transport and cell-surface receptor binding. ,Function:Binds IL13 with a low affinity. Together with IL4R-alpha can form a functional receptor for IL13. Also serves as an alternate accessory protein to the common cytokine receptor gamma chain for IL4 signaling , but cannot replace the function of gamma C in allowing enhanced IL2 binding activity. ,similarity:Belongs to the type I cytokine receptor family. Type 5 subfamily. ,subunit:Interleukin 13 receptor is a complex of IL4R , IL13RA1 , and possibly other components. Interacts with TRAF3IP1. ,tissue specificity:Ubiquitous. Highest levels in heart , liver , skeletal muscle and ovary; lowest levels in brain , lung and kidney. Also found in B-cells , T-cells and endothelial cells. ,
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