Protein families
- AAA ATPase family
- ABCF ATPase subfamily
- Acetyltransferase family
- Alpha/beta-type SASP family
- Amino acid-polyamine-organocation (APC) superfamily
- Carbohydrate kinase PfkB family
- Cation diffusion facilitator (CDF) transporter (TC 2.A.4) family
- Cation transport ATPase (P-type) (TC 3.A.3) family
- CitM transporter family (TC 2.A.11)
- Class-I aminoacyl-tRNA synthetase family
- Class-II aminoacyl-tRNA synthetase family
- Class-I pyridoxal-phosphate-dependent aminotransferase family
- Class-II pyridoxal-phosphate-dependent aminotransferase family
- Class-IV pyridoxal-phosphate-dependent aminotransferase family
- Class-V pyridoxal-phosphate-dependent aminotransferase family
- CysTW subfamily
- Cytidine and deoxycytidylate deaminase family
- Dicarboxylate/amino acid:cation symporter (DAACS) (TC 2.A.23) family
- Fur family
- Glycosyl hydrolase 13 family
- Glycosyl hydrolase 18 family
- Glycosyltransferase 1 family
- Glycosyltransferase 2 family
- Helicase family
- Isochorismatase family
- LacI family
- Major facilitator superfamily
- Membrane fusion protein (MFP) (TC 8.A.1) family
- MerR family
- Metallo-beta-lactamase superfamily
- Metallo-dependent hydrolases superfamily
- Metallophosphoesterase superfamily
- Methyltransferase superfamily
- MscS (TC 1.A.23) family
- N-acetylmuramoyl-L-alanine amidase 2 family
- NAD(P)-dependent epimerase/dehydratase family
- Peptidase M16 family
- Peptidase S8 family
- Peptidase S11 family
- Peptidase S26 family
- Peptidase C40 family
- Peptidase S54 family
- Peroxiredoxin family
- Phage integrase family
- Polysaccharide deacetylase family
- PRD-containing transcription factors
- Protein kinase superfamily
- PSMR family
- Purine/pyrimidine phosphoribosyltransferase family
- Radical SAM superfamily
- S-transferase-like (STL) superfamily
- SEDS proteins
- Site-specific recombinase resolvase family
- small heat shock protein (Hsp20) family
- Sodium:galactoside symporter (TC 2.A.2) family
- SOS response-associated peptidase family
- Sugar phosphate cyclases superfamily
- TerC family
- 4-toluene sulfonate uptake permease (TSUP) (TC 2.A.102) family
- Transferase hexapeptide repeat family
- UPF0702 family
- UPF0750 membrane proteins
- Zinc-containing alcohol dehydrogenase family
