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(+) => guanosine(745) in 23s rrna + s-adenosyl-l-methionine