Human IL-17A, Tag Free Protein (Active) (HA210731)

Interleukin‑17A (IL‑17A), also known as CTLA‑8, is a 15‑20 kDa glycosylated cytokine that plays an important role in anti‑microbial and chronic inflammation. The six IL‑17 cytokines (IL‑17A‑F) are encoded by separate genes but adopt a conserved cystine knot fold. Mature human IL‑17A shares 60% amino acid sequence identity with mouse and rat IL‑17A. IL‑17A is secreted by Th17 cells, gamma /δ T cells, iNKT cells, NK cells, LTi cells, neutrophils, and intestinal Paneth cells. It forms disulfide‑linked homodimers as well as disulfide‑linked heterodimers with IL‑17F. IL‑17A exerts its effects through the transmembrane IL‑17 RA in complex with IL‑17 RC or IL‑17 RD. Both IL‑17 RA and IL‑17 RC are required for responsiveness to heterodimeric IL‑17A/F. IL‑17A promotes protective mucosal and epidermal inflammation in response to microbial infection. It induces chemokine production, neutrophil influx, and the production of antibacterial peptides.