Figure 1.
Transferase-mediated N-terminal protein modification. Top: Fully enzymatic methods use aminoacyl tRNA synthetase (aaRS), tRNA, aminoacyl transferase (AaT), amino acid, and ATP. Bottom: Chemoenzymatic methods use only a synthetic nucleic acid donor and transferase. In this work, an aminoacyl mononucleoside (Rn = H) was used.