Associates with IL31RA to form the IL31 receptor (PubMed:9920829). Binds IL31 to activate STAT3 and possibly STAT1 and STAT5 (By similarity). Capable of transducing OSM-specific signaling events (By similarity). Heterodimer composed of OSMR and IL6ST (type II OSM receptor). Heterodimer with IL31RA to form the IL31 receptor. Widely expressed (PubMed:9584176). Expressed at highest levels in the lung, heart, thymus and spleen (PubMed:9920829). Expressed in dorsal root ganglia (PubMed:25381841). Up-regulated by IL31 in dorsal root ganglia. The WSXWS motif appears to be necessary for proper protein folding and thereby efficient intracellular transport and cell-surface receptor binding. The box 1 motif is required for JAK interaction and/or activation. Belongs to the type I cytokine receptor family. Type 2 subfamily.