7.5 tRNAs are charged with amino acids by synthetases Catalytic doma in: tRNA tRNA Oligomer atp acceptor anticodon formation amino acid sites helix bindingbinding Nucleotide fold(class D)or a-helix or antipa rallel B-sheet(class Il) B-barrel Figure 7. 11 An aminoacyl tRNa Synthetase contains ass i mostly mon omers some homodimers three or four regions with different functions. (Only multimeric synthetases Class ll mostly homodimers, 2 tetramers possess an oligomerization domain. 消当Figure 7.11 An aminoacyl￾tRNA synthetase contains three or four regions with different functions. (Only multimeric synthetases possess an oligomerization domain.) 7.5 tRNAs are charged with amino acids by synthetases