_EC 6.1.1.- Ligases forming aminoacyl-tRNA and related compounds. 563 PDB entries  
EC 6.-.-.- Ligases. [1,658 PDB entries]
EC 6.1.-.- Forming carbon-oxygen bonds. [574 PDB entries]
EC 6.1.1.- Ligases forming aminoacyl-tRNA and related compounds. [563 PDB entries]    
EC 6.1.1.1 Tyrosine--tRNA ligase. [67 PDB entries]
EC 6.1.1.2 Tryptophan--tRNA ligase. [49 PDB entries]
EC 6.1.1.3 Threonine--tRNA ligase. [32 PDB entries]
EC 6.1.1.4 Leucine--tRNA ligase. [29 PDB entries]
EC 6.1.1.5 Isoleucine--tRNA ligase. [11 PDB entries]
EC 6.1.1.6 Lysine--tRNA ligase. [21 PDB entries]
EC 6.1.1.7 Alanine--tRNA ligase. [22 PDB entries]
EC 6.1.1.8 Deleted entry. [-]
EC 6.1.1.9 Valine--tRNA ligase. [5 PDB entries]
EC 6.1.1.10 Methionine--tRNA ligase. [66 PDB entries]
EC 6.1.1.11 Serine--tRNA ligase. [25 PDB entries]
EC 6.1.1.12 Aspartate--tRNA ligase. [16 PDB entries]
EC 6.1.1.13 D-alanine--poly(phosphoribitol) ligase. [13 PDB entries]
EC 6.1.1.14 Glycine--tRNA ligase. [19 PDB entries]
EC 6.1.1.15 Proline--tRNA ligase. [25 PDB entries]
EC 6.1.1.16 Cysteine--tRNA ligase. [5 PDB entries]
EC 6.1.1.17 Glutamate--tRNA ligase. [32 PDB entries]
EC 6.1.1.18 Glutamine--tRNA ligase. [23 PDB entries]
EC 6.1.1.19 Arginine--tRNA ligase. [15 PDB entries]
EC 6.1.1.20 Phenylalanine--tRNA ligase. [26 PDB entries]
EC 6.1.1.21 Histidine--tRNA ligase. [21 PDB entries]
EC 6.1.1.22 Asparagine--tRNA ligase. [5 PDB entries]
EC 6.1.1.23 Aspartate--tRNA(Asn) ligase. [5 PDB entries]
EC 6.1.1.24 Glutamate--tRNA(Gln) ligase. [-]
EC 6.1.1.25 Deleted entry. [-]
EC 6.1.1.26 Pyrrolysine--tRNA(Pyl) ligase. [25 PDB entries]
EC 6.1.1.27 O-phosphoserine--tRNA ligase. [6 PDB entries]
EC 6.1.1.28 Deleted entry. [-]
EC 6.1.1.n1 Transferred entry: 6.3.1.13. [-]
EC 6.1.1.n2 Transferred entry: 6.1.1.27. [-]

[-] signifies that there are no PDB entries for the given enzyme subclass