TNFAIP3 (TNF Alpha Induced Protein 3): TNFAIP3, also known as A20, is a crucial negative regulator of NF-κB signaling, aiding in the control of inflammation and immune responses. It functions by ubiquitinating signaling molecules to halt NF-κB activation, thereby preventing prolonged inflammation that may result in autoimmune diseases. Mutations or dysregulation of TNFAIP3 are associated with various autoimmune and inflammatory disorders, making it a significant target in therapeutic research.