guanosine(745) in 23S rRNA + S-adenosyl-L-methionine => N(1)-methylguanosine(745) in 23S rRNA + S-adenosyl-L-homocysteine + H(+)
guanosine(745) in 23s rrna + s-adenosyl-l-methionine => n(1)-methylguanosine(745) in 23s rrna + s-adenosyl-l-homocysteine + h(+)