Enables enzyme binding activity and identical protein binding activity. Involved in positive regulation of DNA metabolic process; positive regulation of DNA replication; and positive regulation of catalytic activity. Predicted to be located in chromatin and nucleus. Predicted to be active in cytoplasm; nucleolus; and nucleoplasm. Orthologous to human NPM2 (nucleophosmin/nucleoplasmin 2). [provided by Alliance of Genome Resources, Apr 2022]