Predicted to enable mRNA binding activity. Acts upstream of or within I-kappaB kinase/NF-kappaB signaling and regulation of transcription by RNA polymerase II. Located in nucleus. Is expressed in several structures, including branchial arch; cerebral cortex; gut epithelium; metanephros; and sensory organ. Orthologous to human SNIP1 (Smad nuclear interacting protein 1). [provided by Alliance of Genome Resources, Apr 2022]