Predicted to enable MHC class II protein complex binding activity. Acts upstream of or within antigen processing and presentation of exogenous peptide antigen via MHC class II and regulation of T cell differentiation. Predicted to be part of MHC class II protein complex. Is expressed in several structures, including central nervous system; cornea; genitourinary system; palatal shelf; and salivary gland. Human ortholog(s) of this gene implicated in occupational asthma. Orthologous to human HLA-DOA (major histocompatibility complex, class II, DO alpha). [provided by Alliance of Genome Resources, Apr 2022]