Catalysis of the transfer of a methyl group to the oxygen atom of an acceptor molecule
1. GOC: ai
2. EC 2.1.13. Reactome: R-HSA-5578717 "BCDIN3D dimethylates 5' phosphate of pre-miR-145"
4. Reactome: R-HSA-5629203 "HENMT1 methylates 2' hydroxyl at 3' end of piRNA in 4xMeR-PIWIL1:piRNA:TDRD6:TDRKH"
5. Reactome: R-HSA-5629218 "HENMT1 methylates 2' hydroxyl at 3' end of piRNA in 6xMeR-PIWIL2:piRNA:TDRD1:TDRD12:DDX4:ASZ:MOV10L1"
6. Reactome: R-HSA-5629237 "HENMT1 methylates 2' hydroxyl at 3' end of piRNA in MeR-PIWIL4:piRNA:TDRD9:MAEL:TDRKH"
7. Reactome: R-HSA-6790907 "Box C/D snoRNP methylates ribonucleotides in pre-rRNA yielding 2'-O-methylribonucleotides"