Molecular function

histone H3R2 arginine methyltransferase activity, histone methylase activity (H3-R2 specific), histone methyltransferase activity (H3-R2 specific), histone-H3R2 methyltransferase activity, histone-arginine N-methyltransferase activity (H3-R2 specific)

Catalysis of the reaction: S-adenosyl-L-methionine + (histone H3)-arginine (position 2) = S-adenosyl-L-homocysteine + (histone H3)-N-methyl-arginine (position 2). This reaction is the addition of a methyl group to the arginine residue at position 2 of histone H3.