N(1)-methylpseudouridine(1191) in yeast 18S rRNA + S-adenosyl-L-homocysteine + H(+) => pseudouridine(1191) in yeast 18S rRNA + S-adenosyl-L-methionine
n(1)-methylpseudouridine(1191) in yeast 18s rrna + s-adenosyl-l-homocysteine + h(+) => pseudouridine(1191) in yeast 18s rrna + s-adenosyl-l-methionine