IL-10R beta

IL-10 receptor complex consists of a heterodimer of four transmembrane chains, two of which form IL-10R alpha and two of which form IL-10R beta. IL-10R beta, originally known as the orphan receptor CRF2-4, is an essential accessory subunit for the active interleukin 10 receptor complex[1].
IL-10R beta can bind to IL-10 via the JAK-STAT pathway, and activation of the IL-10 receptor complex leads to phosphorylation of the receptor-associated proteins TYK and JAK-1, and ultimately to activation of the transcription factors STAT3, STAT1, and STAT5, which regulate the expression of IL-10-responsive genes, including c-myc, bcl-2, and bcl-xL, initiating signal transduction[2].
IL-10R beta is expressed on most cell types and is also a shared cell surface receptor required for the activation of five class II cytokines (IL-10, IL-22, IL-26, IL-28 and IFNL1), which play a key role in host defense, immune regulation. Among them, the IFNLR1/IL10R beta dimer is the receptor for the cytokine ligands IFNL2 and IFNL3 and mediates their antiviral activity[3].