What is the reaction catalyzed by aminoacyl-trna synthetases? see section 17.4 ( page 357) . what is the reaction catalyzed by aminoacyl-trna synthetases? see section 17.4 ( page 357) . these enzymes catalyze formation of the bonds between the trna and the appropriate amino acids. these enzymes carry out synthesis of new proteins, joining amino acids via peptide bonds. these enzymes catalyze the formation of trnas. these enzymes modify the mrna into its mature form?