Human Interleukin 21 Receptor (IL21R) Protein

Background

Interleukin 21 receptor (IL21R) is a member of the cytokine receptor superfamily, specifically involved in immune cell communication and regulation. IL21R binds interleukin-21 (IL-21), a cytokine that plays crucial roles in immune response modulation, primarily impacting the activity of T cells, B cells, and natural killer (NK) cells. IL-21/IL21R signaling is essential for adaptive immunity, supporting the differentiation, proliferation, and functional enhancement of immune cells. This receptor is expressed on a wide range of cells within the immune system, including T and B lymphocytes, NK cells, dendritic cells, and some epithelial cells. Given its immunoregulatory functions, IL21R signaling has implications in autoimmunity, cancer immunology, and chronic inflammatory conditions.