| Family | Dataset( PDB-ids with chain details ) |
| (Uracil-5-)-methyltransferase | 2BH2:A |
| Anticodon-binding domain | 1ASY:A,1C0A:A |
| Anticodon-binding domain of Class II aaRS | 1H4S:A,1QF6:A |
| Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases | 1F7U:A,1U0B:B |
| Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases | 1FFY:A |
| Archaeal tRNA CCA-adding enzyme | 1TFW:A |
| Arginyl-tRNA synthetase (ArgRS), N-terminal 'additional' domain | 1F7U:A |
| C-terminal domain of ProRS | 1H4S:A |
| C-terminal domain of glutamyl-tRNA synthetase (GluRS) | 1N78:A |
| C-terminal domain of ribosomal protein L2 | 1VQO:A |
| C-terminal fragment of elongation factor SelB | 1WSU:A |
| Canonical RBD | 1A9N:B,1FXL:A,2VOO:A |
| Class I aminoacyl-tRNA synthetases (RS), catalytic domain | 1F7U:A,1FFY:A,1J1U:A,1N78:A,1QTQ:A,1U0B:B,2AZX:A |
| Class II aminoacyl-tRNA synthetase (aaRS)-like, catalytic domain | 1ASY:A,1C0A:A,1H4S:A,1QF6:A,1SER:A |
| Cold shock DNA-binding domain-like | 1VQO:A,2A8V:A,2ASB:A,2VNU:D,2VQE:Q |
| Comoviridae-like VP | 1PGL:2 |
| Double-stranded RNA-binding domain (dsRBD) | 2NUG:A |
| EF-Tu/eEF-1alpha/eIF2-gamma C-terminal domain | 1B23:P |
| EV matrix protein | 1H2C:A |
| Elongation factors | 1B23:P |
| Eukaryotic type KH-domain (KH-domain type I) | 1EC6:A |
| Formyltransferase | 2FMT:A |
| Fungal ribonucleases | 1B2M:A |
| G proteins | 1B23:P |
| GAD domain | 1C0A:A |
| Hut operon positive regulatory protein HutP | 1WPU:A |
| L15e | 1VQO:M |
| L23p | 1VQO:S |
| L30e/L7ae ribosomal proteins | 1SDS:A |
| La domain | 2VOO:A |
| NF-kappa-B/REL/DORSAL transcription factors, C-terminal domain | 1OOA:A |
| NSP3 homodimer | 1KNZ:A |
| Nop domain | 2OZB:B |
| PAZ domain | 1SI3:A |
| PIWI domain | 2BGG:A |
| PUA domain | 1K8W:A |
| Pleiotropic translational regulator Hfq | 1KQ2:A |
| Poly A polymerase head domain-like | 1VFG:A |
| Poly(A) polymerase, PAP | 2Q66:A |
| Post formyltransferase domain | 2FMT:A |
| Prokaryotic ribosomal protein L17 | 2J01:R |
| Prokaryotic type KH domain \(KH-domain type II\) | 2ASB:A,2UUB:C |
| Pseudouridine synthase II TruB | 1K8W:A |
| Pumilio repeat | 1M8X:A |
| RNA bacteriophage capsid protein | 2BU1:A |
| RNA-dependent RNA-polymerase | 1N35:A,1NB7:A,1UVJ:A,2E9T:A |
| RNB domain-like | 2VNU:D |
| RNase III catalytic domain-like | 2NUG:A |
| RNase Z-like | 2FK6:A |
| Rel/Dorsal transcription factors, DNA-binding domain | 1OOA:A |
| Rhabdovirus nucleocapsid protein | 2GIC:A |
| Rho termination factor, N-terminal domain | 2A8V:A |
| Ribonuclease PH domain | 2JEA:A,2JEA:B |
| Ribosomal protein L1 | 2HW8:A |
| Ribosomal protein L10 | 1VQO:G |
| Ribosomal protein L10e | 1VQO:H |
| Ribosomal protein L11, C-terminal domain | 1VQO:I |
| Ribosomal protein L13 | 1VQO:J |
| Ribosomal protein L14 | 1VQO:K |
| Ribosomal protein L18 and S11 | 1VQO:N,2VQE:K |
| Ribosomal protein L19 | 2J01:T |
| Ribosomal protein L19 (L19e) | 1VQO:P |
| Ribosomal protein L20 | 2J01:U |
| Ribosomal protein L21p | 2J01:V |
| Ribosomal protein L22 | 1VQO:R,2J01:W |
| Ribosomal protein L24e | 1VQO:U |
| Ribosomal protein L25-like | 1DFU:P,1FEU:A |
| Ribosomal protein L28 | 2J01:1 |
| Ribosomal protein L29 (L29p) | 1VQO:V,2J01:2 |
| Ribosomal protein L3 | 1VQO:B,2J01:E |
| Ribosomal protein L30p/L7e | 1VQO:W,2J01:3 |
| Ribosomal protein L31e | 1VQO:X |
| Ribosomal protein L31p | 2J01:4 |
| Ribosomal protein L32e | 1VQO:Y |
| Ribosomal protein L32p | 2J01:5 |
| Ribosomal protein L35p | 2J01:8 |
| Ribosomal protein L37ae | 1VQO:Z |
| Ribosomal protein L4 | 1VQO:C |
| Ribosomal protein L44e | 1VQO:3 |
| Ribosomal protein L5 | 1VQO:D |
| Ribosomal protein L6 | 1VQO:E,2J01:H |
| Ribosomal protein L9 | 2J01:I |
| Ribosomal protein S10 | 2VQE:J |
| Ribosomal protein S13 | 2VQE:M |
| Ribosomal protein S14 | 2VQE:N |
| 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 S4 | 2VQE:D |
| 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 L24p and L21e | 1VQO:T,1VQO:Q |
| Ribosome complexes | 2VQE:L,2VQE:O,2VQE:P,2VQE:S |
| Ribotoxin | 1JBS:A |
| RoRNP C-terminal domain-like | 1YVP:A |
| SRP19 | 1JID:A |
| Seryl-tRNA synthetase (SerRS) | 1SER:A |
| Signal peptide-binding domain | 1HQ1:A |
| Sm motif of small nuclear ribonucleoproteins, SNRNP | 1M8V:A |
| Small subunit | 2VQE:E |
| TGS domain | 1QF6:A |
| TRAM domain | 2BH2:A |
| TROVE domain-like | 1YVP:A |
| Tandem AAA-ATPase domain | 2J0S:A |
| Threonyl-tRNA synthetase (ThrRS), second 'additional' domain | 1QF6:A |
| Tombusvirus P19 core protein, VP19 | 1R9F:A |
| Translational machinery components | 2VQE:I |
| Tymoviridae-like VP | 1DDL:A |
| U2A'-like | 1A9N:A |
| ValRS/IleRS/LeuRS editing domain | 1FFY:A |
| Z-DNA binding domain | 2GXB:A |
| dsRNA phage RNA-dependent RNA-polymerase | 1UVJ:A |
| mRNA cap methylase | 1AV6:A |
| tRNA-guanine transglycosylase | 1Q2R:A |
| tRNA-intron endonuclease catalytic domain-like | 2GJW:A |