label: rRNA (adenine-N1-)-methyltransferase activity
label_lc: rrna (adenine-n1-)-methyltransferase activity
description: "Catalysis of the reaction: S-adenosyl-L-methionine + adenine(645) in 25S rRNA = S-adenosyl-L-homocysteine + N(1)-methyladenine(645) in 25S rRNA."