Receptor for IL27. Requires IL6ST/GP130 to mediate signal transduction in response to IL27. This signaling system acts through STAT3 and STAT1. Involved in the regulation of Th1-type immune responses. Also appears to be involved in innate defense mechanisms. Expressed in CD4+ and CD8+ T-cells, B-cells, natural killer cells and macrophages. Highest levels in CD4+ T-cells and natural killer cells. Expression highest in Th0 cells. Down-regulated on differentiation of CD4+ T-cells in both Th1 and TH2 cells. 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.