Enables chromatin binding activity. Involved in several processes, including animal organ development; regulation of epithelial cell proliferation; and regulation of transcription by RNA polymerase II. Located in nucleus. Human ortholog(s) of this gene implicated in endocrine gland cancer (multiple); hyperparathyroidism; and multiple endocrine neoplasia type 1. Orthologous to human MEN1 (menin 1). [provided by Alliance of Genome Resources, Apr 2022]