This enzyme, which occurs in both prokaryotes and eukaryotes, recognizes specific pseudouridine residues (¦·) in small subunits of ribosomal RNA based on the local RNA structure. It recognizes ¦·914 in 16S rRNA from the archaeon Methanocaldococcus jannaschii, ¦·1191 in yeast 18S rRNA, and ¦·1248 in human 18S rRNA.
Cofactor
History
Reactions
S-adenosyl-L-methionine + pseudouridine(1191) in yeast 18S rRNA = S-adenosyl-L-homocysteine + N(1)-methylpseudouridine(1191) in yeast 18S rRNA.