| Superfamily | Dataset( PDB-ids with chain details ) |
| "Winged helix" binding domain | 1WSU:A,2GXB:A,2VOO:A |
| ARM repeat | 1M8X:A |
| Alpha-L RNA-binding motif | 2VQE:D |
| An anticodon-binding domain of class I aminoacyl-tRNA synthetases | 1N78:A |
| Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases | 1FFY:A,1U0B:B |
| Arginyl-tRNA synthetase (ArgRS), N-terminal 'additional' domain | 1F7U:A |
| C-terminal domain of ProRS | 1H4S:A |
| Class II aaRS ABD-related | 1QF6:A |
| Class II aaRS and biotin synthetases | 1ASY:A,1C0A:A,1H4S:A,1QF6:A,1SER:A |
| DNA/RNA polymerases | 1N35:A,1NB7:A,1UVJ:A,2E9T:A |
| E set domains | 1OOA:A |
| EF-Tu/eEF-1alpha/eIF2-gamma C-terminal domain | 1B23:P |
| EV matrix protein | 1H2C:A |
| Eukaryotic type KH-domain (KH-domain type I) | 1EC6:A |
| Formyltransferase | 2FMT:A |
| GAD domain-like | 1C0A:A |
| Glucocorticoid receptor-like (DNA-binding domain) | 1VQO:U,2VQE:N |
| Hut operon positive regulatory protein HutP | 1WPU:A |
| L domain-like | 1A9N:A |
| L21p-like | 2J01:V |
| L28p-like | 2J01:1,2J01:4 |
| L30e-like | 1SDS:A |
| L35p-like | 2J01:8 |
| L9 N-domain-like | 2J01:I |
| Metallo-hydrolase/oxidoreductase | 2FK6:A |
| Microbial ribonucleases | 1B2M:A,1JBS:A |
| NSP3 homodimer | 1KNZ:A |
| Nop domain | 2OZB:B |
| Nucleic acid-binding proteins | 1ASY:A,1C0A:A,1VQO:A,2A8V:A,2ASB:A,2BH2:A,2VNU:D,2VQE:Q |
| Nucleotidyltransferase | 1TFW:A,1VFG:A,2Q66:A |
| Nucleotidylyl transferase | 1F7U:A,1FFY:A,1J1U:A,1N78:A,1QTQ:A,1U0B:B,2AZX:A |
| P-loop containing nucleoside triphosphate hydrolases | 1B23:P,2J0S:A |
| PAP/OAS1 substrate-binding domain | 1TFW:A,2Q66:A |
| PAZ domain | 1SI3:A |
| PUA domain-like | 1K8W:A |
| Poly A polymerase C-terminal region-like | 1VFG:A |
| Positive stranded ssRNA viruses | 1DDL:A,1PGL:2 |
| Prokaryotic ribosomal protein L17 | 2J01:R |
| Prokaryotic type KH domain (KH-domain type II) | 2ASB:A,2UUB:C |
| Pseudouridine synthase | 1K8W:A |
| RL5-like | 1VQO:D |
| RNA bacteriophage capsid protein | 2BU1:A |
| RNA-binding domain, RBD | 1A9N:B,1FXL:A,2VOO:A |
| RNase III domain-like | 2NUG:A |
| Rhabdovirus nucleoprotein-like | 2GIC:A |
| Rho N-terminal domain-like | 2A8V:A |
| Ribonuclease H-like | 2BGG:A |
| Ribonuclease PH domain 2-like | 2JEA:B,2JEA:A |
| Ribosomal protein L1 | 2HW8:A |
| Ribosomal protein L10 | 1VQO:G |
| Ribosomal protein L11, C-terminal domain | 1VQO:I |
| Ribosomal protein L13 | 1VQO:J |
| Ribosomal protein L14 | 1VQO:K |
| Ribosomal protein L16p/L10e | 1VQO:H |
| Ribosomal protein L19 (L19e) | 1VQO:P |
| Ribosomal protein L20 | 2J01:U |
| Ribosomal protein L22 | 1VQO:R,2J01:W |
| Ribosomal protein L25-like | 1DFU:P,1FEU:A,1QTQ:A |
| Ribosomal protein L29 (L29p) | 1VQO:V,2J01:2 |
| Ribosomal protein L30p/L7e | 1VQO:W,2J01:3 |
| Ribosomal protein L31e | 1VQO:X |
| Ribosomal protein L32e | 1VQO:Y |
| Ribosomal protein L4 | 1VQO:C |
| Ribosomal protein L6 | 1VQO:E,2J01:H |
| Ribosomal protein L9 C-domain | 2J01:I |
| Ribosomal protein S10 | 2VQE:J |
| Ribosomal protein S18 | 2VQE:R |
| Ribosomal protein S2 | 2VQE:B |
| Ribosomal protein S20 | 2VQE:T |
| Ribosomal protein S3 C-terminal domain | 2UUB:C |
| Ribosomal protein S5 domain 2-like | 2JEA:A,2JEA:B,2VQE:I |
| Ribosomal protein S6 | 2VQE:F |
| Ribosomal protein S7 | 2VQE:G |
| Ribosomal protein S8 | 2VQE:H |
| Ribosomal proteins L15p and L18e | 1VQO:L,2J01:P |
| Ribosomal proteins S24e, L23 and L15e | 1VQO:S,1VQO:M |
| Ribosome and ribosomal fragments | 2VQE:L,2VQE:O,2VQE:P,2VQE:S,2VQE:E |
| S-adenosyl-L-methionine-dependent methyltransferases | 1AV6:A,2BH2:A |
| S13-like H2TH domain | 2VQE:M |
| SRP19 | 1JID:A |
| Signal peptide-binding domain | 1HQ1:A |
| Sm-like ribonucleoproteins | 1KQ2:A,1M8V:A |
| TGS-like | 1QF6:A |
| TROVE domain-like | 1YVP:A |
| ThrRS/AlaRS common domain | 1QF6:A |
| Tombusvirus P19 core protein, VP19 | 1R9F:A |
| Translation proteins | 1B23:P,1VQO:B,2J01:E |
| Translation proteins SH3-like domain | 1VQO:T,1VQO:Q,1VQO:A,2J01:T |
| Translational machinery components | 1VQO:N,2VQE:K |
| ValRS/IleRS/LeuRS editing domain | 1FFY:A |
| Zn-binding ribosomal proteins | 1VQO:Z,1VQO:3,2J01:5 |
| dsRNA-binding domain-like | 2NUG:A |
| p53-like transcription factors | 1OOA:A |
| tRNA-binding arm | 1SER:A |
| tRNA-guanine transglycosylase | 1Q2R:A |
| tRNA-intron endonuclease catalytic domain-like | 2GJW:A |
| vWA-like | 1YVP:A |