CEBPB and systemic lupus erythematosus: This study found that the TNFAIP3 locus has a complex chromatin regulatory network that spans ∼1M bp from the promoter region of IL20RA to the 3′ untranslated region of TNFAIP3. Functional dissection of the enhancer demonstrated co-dependency of the RelA/p65 and CEBPB binding motifs that, together, increase IL20RA and IFNGR1 expression and decreased TNFAIP3 expression in the context of the TNFAIP3 SLE risk haplotype through dynamic long-range interactions up- and downstream.