Catalysis of the reaction: S-adenosyl-L-methionine + tRNA containing N6-threonylcarbamoyladenosine = S-adenosyl-L-homocysteine + tRNA containing N6-methylthreonylcarbamoyladenosine.
Source:PMID:25063302
Comment
This activity is distinct from 'tRNA (adenine-N6-)-methyltransferase activity' (GO:0016430) in that it requires the presence of a threonylcarbamoyl modification.