Predicted to enable identical protein binding activity. Acts upstream of or within negative regulation of neuron differentiation; negative regulation of protein sumoylation; and negative regulation of transcription by RNA polymerase II. Located in nucleus. Is expressed in several structures, including axial skeleton; early conceptus; genitourinary system; gut; and nervous system. Orthologous to human HMG20A (high mobility group 20A). [provided by Alliance of Genome Resources, Apr 2022]