This is a family of eukaryotic fusion proteins. It bridges two adjacent genes that encode distinct proteins, IQCJ, a novel IQ motif containing protein and SCHIP1, a schwannomin interacting protein. It contains a unique calmodulin-binding IQ motif at the N-terminus not shared with its shorter isoform SCHIP1, suggesting a distinctive function for this protein. It is localised to cytoplasm and actin-rich regions, and in differentiated PC12 cells is seen in neurite extensions. the exact physiological function is unclear [1].

1: IQCJ-SCHIP1, a novel fusion transcript encoding a calmodulin-binding IQ motif protein. Kwasnicka-Crawford DA, Carson AR, Scherer SW; Biochem Biophys Res Commun. 2006;350:890-899. PMID:17045569