Enables identical protein binding activity; protein-arginine N-methyltransferase activity; and snoRNP binding activity. Involved in several processes, including liver regeneration; positive regulation of erythrocyte differentiation; and positive regulation of hemoglobin biosynthetic process. Acts upstream of or within peptidyl-arginine methylation, to asymmetrical-dimethyl arginine. Located in cytosol; membrane; and nucleus. Part of protein-containing complex. Biomarker of asthma. Orthologous to human PRMT1 (protein arginine methyltransferase 1). [provided by Alliance of Genome Resources, Apr 2022]