Predicted to enable several functions, including histone deacetylase binding activity; transcription coactivator activity; and transcription corepressor activity. Predicted to be involved in several processes, including intracellular signal transduction; regulation of gene expression; and regulation of signal transduction. Predicted to act upstream of or within several processes, including defense response to other organism; hematopoietic or lymphoid organ development; and regulation of gene expression. Predicted to be located in several cellular components, including cytosol; midbody; and nucleoplasm. Predicted to be part of Bcl3-Bcl10 complex and Bcl3/NF-kappaB2 complex. Orthologous to human BCL3 (BCL3 transcription coactivator). [provided by Alliance of Genome Resources, Apr 2022]