Molecular function

protein arginine omega-N asymmetric methylase activity, protein arginine omega-N asymmetric methyltransferase activity

Catalysis of the addition of a second methyl group to methylated peptidyl-arginine. Methylation is on the same terminal nitrogen (omega nitrogen) residue that was previously methylated, resulting in asymmetrical peptidyl-N(omega),N(omega)-dimethylated arginine residues.

S-adenosyl-L-methionine:[protein]-L-arginine N-methyltransferase ([protein]-Nomega,Nomega-dimethyl-L-arginine-forming), type I PRMT activity, type I protein arginine methyltransferase activity

Note that type I protein arginine N-methyltransferase enzymes possess 'protein-arginine omega-N monomethyltransferase activity ; GO:0035241' and 'protein-arginine omega-N asymmetric methyltransferase activity ; GO:0035242'.