The Tbk1/Ikki binding domain (TBD) is a 40 amino acid domain able to bind kinases, has been found to be essential for poly(I:C)-induced IRF activation [1]. The domain is found in SINTBAD, TANK and NAP1 protein. This domain is predicted to form an a-helix with residues essential for kinase binding clustering on one side [1].

1: SINTBAD, a novel component of innate antiviral immunity, shares a TBK1-binding domain with NAP1 and TANK. Ryzhakov G, Randow F; EMBO J. 2007;26:3180-3190. PMID:17568778