This domain family is found in eukaryotes, and is approximately 40 amino acids in length. INCENP is a regulatory protein in the chromosome passenger complex. It is involved in regulation of the catalytic protein Aurora B. It performs this function in association with two other proteins - Survivin and Borealin. These proteins form a tight three-helical bundle. The N terminal domain is the domain involved in formation of this three helical bundle.

1: Structure of a Survivin-Borealin-INCENP core complex reveals how chromosomal passengers travel together. Jeyaprakash AA, Klein UR, Lindner D, Ebert J, Nigg EA, Conti E; Cell. 2007;131:271-285. PMID:17956729