This family consists of several eukaryotic proteins. Suppressor of IKBKE 1 (SIKE) is a physiological suppressor of IKK-epsilon and TBK1, which are two IKK-related kinases involved in virus- and TLR3-triggered activation of interferon regulatory factor 3 (IRF-3). Other members of this family are circulating cathodic antigen (CCA), found in Schistosoma mansoni (Blood fluke) [2, 3], and FGFR1 oncogene partner 2, which may be involved in wound healing pathway [4].

1: SIKE is an IKK epsilon/TBK1-associated suppressor of TLR3- and virus-triggered IRF-3 activation pathways. Huang J, Liu T, Xu LG, Chen D, Zhai Z, Shu HB; EMBO J. 2005;24:4018-4028. PMID:16281057

2: Molecular cloning and characterization of the polypeptide backbone of Schistosoma mansoni circulating cathodic antigen. Abdeen HH, Attallah AF, Mansour MM, Harrison RA; Mol Biochem Parasitol 1999;101:149-159. PMID:10413050

3: The immunologically reactive O-linked polysaccharide chains derived from circulating cathodic antigen isolated from the human blood fluke Schistosoma mansoni have Lewis x as repeating unit. Van Dam GJ, Bergwerff AA, Thomas-Oates JE, Rotmans JP, Kamerling JP, Vliegenthart JF, Deelder AM; Eur J Biochem. 1994;225:467-482. PMID:7925469

4: Oral fibroblast expression of wound-inducible transcript 3.0 (wit3.0) accelerates the collagen gel contraction in vitro. Sukotjo C, Lin A, Song K, Ogawa T, Wu B, Nishimura I; J Biol Chem. 2003;278:51527-51534. PMID:14527947