This family of proteins probably use S-AdoMet.

1: SpoU protein of Escherichia coli belongs to a new family of putative rRNA methylases. Koonin EV, Rudd KE; Nucleic Acids Res 1993;21:5519-5519. PMID:8265370

2: The spoU gene of escherichia coli , the fourth gene of the spoT operon, is essential for tRNA (Gm18) 2 ' - O -methyltransferase activity. Persson BC, Jager G, Gustafsson C; Nucleic Acids Res 1997;25:4093-4097. PMID:9321663