tRNA wybutosine-synthesizing protein 2 homolog (TRMT12)

S-adenosyl-L-methionine-dependent transferase that serves as a component of the wybutosine biosynthesis pathway. Wybutosine is a hyper modified guanosine using a tricyclic base located at the 3'-position adjacent to the anticodon of eukaryotic phenylalanine tRNA.

Catalyzes the transfer of the alpha-amino-alpha- carboxypropyl (acp) group from S-adenosyl-L-methionine to the C-7 position of 4-demethylwyosine (imG-14) to produce wybutosine-86. .