id Class Fold Superfamily Family
1.27.1.1 All alpha proteins 4-helical cytokines 4-helical cytokines Long-chain cytokines
1.27.1.2 All alpha proteins 4-helical cytokines 4-helical cytokines Short-chain cytokines
1.36.1.2 All alpha proteins lambda repressor-like DNA-binding domains lambda repressor-like DNA-binding domains Phage repressors
1.36.1.5 All alpha proteins lambda repressor-like DNA-binding domains lambda repressor-like DNA-binding domains Bacterial repressors
1.4.1.1 All alpha proteins DNA/RNA-binding 3-helical bundle Homeodomain-like Homeodomain
1.4.1.2 All alpha proteins DNA/RNA-binding 3-helical bundle Homeodomain-like Recombinase DNA-binding domain
1.4.1.3 All alpha proteins DNA/RNA-binding 3-helical bundle Homeodomain-like Myb
1.41.1.2 All alpha proteins EF Hand-like EF-hand S100 proteins
1.41.1.5 All alpha proteins EF Hand-like EF-hand Calmodulin-like
1.45.1.2 All alpha proteins Met repressor-like Met repressor-like Bacterial repressors
2.1.1.1 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin V set domains (antibody variable domain-like)
2.1.1.2 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin C1 set domains (antibody constant domain-like)
2.1.1.3 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin C2 set domains
2.1.1.4 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin I set domains
2.1.1.5 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin E set domains
2.28.1.1 All beta proteins ConA-like lectins/glucanases ConA-like lectins/glucanases Legume lectins
2.28.1.3 All beta proteins ConA-like lectins/glucanases ConA-like lectins/glucanases Galectin (animal S-lectin)
2.38.4.1 All beta proteins OB-fold Nucleic acid-binding proteins Anticodon-binding domain
2.38.4.3 All beta proteins OB-fold Nucleic acid-binding proteins Single strand DNA-binding domain, SSB
2.38.4.5 All beta proteins OB-fold Nucleic acid-binding proteins Cold shock DNA-binding domain-like
2.44.1.2 All beta proteins Trypsin-like serine proteases Trypsin-like serine proteases Eukaryotic proteases
2.5.1.1 All beta proteins Cupredoxins Cupredoxins Plastocyanin/azurin-like
2.5.1.3 All beta proteins Cupredoxins Cupredoxins Multidomain cupredoxins
2.52.1.2 All beta proteins PH domain-like PH domain-like Phosphotyrosine-binding domain (PTB)
2.56.1.2 All beta proteins Lipocalins Lipocalins Fatty acid binding protein-like
2.9.1.2 All beta proteins Viral coat and capsid proteins Viral coat and capsid proteins Plant virus proteins
2.9.1.3 All beta proteins Viral coat and capsid proteins Viral coat and capsid proteins Insect virus proteins
2.9.1.4 All beta proteins Viral coat and capsid proteins Viral coat and capsid proteins Animal virus proteins
3.1.8.1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Glycosyltransferases alpha-Amylases, N-terminal domain
3.1.8.3 Alpha and beta proteins (a/b) TIM beta/alpha-barrel Glycosyltransferases beta-glycanases
3.2.1.2 Alpha and beta proteins (a/b) NAD(P)-binding Rossmann-fold domains NAD(P)-binding Rossmann-fold domains Tyrosine-dependent oxidoreductases
3.2.1.3 Alpha and beta proteins (a/b) NAD(P)-binding Rossmann-fold domains NAD(P)-binding Rossmann-fold domains Glyceraldehyde-3-phosphate dehydrogenase-like, N-terminal domain
3.2.1.4 Alpha and beta proteins (a/b) NAD(P)-binding Rossmann-fold domains NAD(P)-binding Rossmann-fold domains Formate/glycerate dehydrogenases, NAD-domain
3.2.1.5 Alpha and beta proteins (a/b) NAD(P)-binding Rossmann-fold domains NAD(P)-binding Rossmann-fold domains Lactate & malate dehydrogenases, N-terminal domain
3.2.1.6 Alpha and beta proteins (a/b) NAD(P)-binding Rossmann-fold domains NAD(P)-binding Rossmann-fold domains 6-phosphogluconate dehydrogenase-like, N-terminal domain
3.2.1.7 Alpha and beta proteins (a/b) NAD(P)-binding Rossmann-fold domains NAD(P)-binding Rossmann-fold domains Amino-acid dehydrogenase-like, C-terminal domain
3.3.1.2 Alpha and beta proteins (a/b) FAD/NAD(P)-binding domain FAD/NAD(P)-binding domain FAD-linked reductases, N-terminal domain
3.3.1.5 Alpha and beta proteins (a/b) FAD/NAD(P)-binding domain FAD/NAD(P)-binding domain FAD/NAD-linked reductases, N-terminal and central domains
3.32.1.1 Alpha and beta proteins (a/b) P-loop containing nucleotide triphosphate hydrolases P-loop containing nucleotide triphosphate hydrolases Nucleotide and nucleoside kinases
3.32.1.11 Alpha and beta proteins (a/b) P-loop containing nucleotide triphosphate hydrolases P-loop containing nucleotide triphosphate hydrolases RecA protein-like (ATPase-domain)
3.32.1.13 Alpha and beta proteins (a/b) P-loop containing nucleotide triphosphate hydrolases P-loop containing nucleotide triphosphate hydrolases Extended AAA-ATPase domain
3.32.1.8 Alpha and beta proteins (a/b) P-loop containing nucleotide triphosphate hydrolases P-loop containing nucleotide triphosphate hydrolases G proteins
3.42.1.1 Alpha and beta proteins (a/b) Thioredoxin fold Thioredoxin-like Thioltransferase
3.42.1.5 Alpha and beta proteins (a/b) Thioredoxin fold Thioredoxin-like Glutathione S-transferases, N-terminal domain
3.42.1.8 Alpha and beta proteins (a/b) Thioredoxin fold Thioredoxin-like Glutathione peroxidase-like
7.3.10.1 Small proteins Knottins (small inhibitors, toxins, lectins) EGF/Laminin EGF-type module
7.3.5.2 Small proteins Knottins (small inhibitors, toxins, lectins) omega toxin-like Spider toxins
7.3.6.1 Small proteins Knottins (small inhibitors, toxins, lectins) Scorpion toxin-like Long-chain scorpion toxins
7.3.6.2 Small proteins Knottins (small inhibitors, toxins, lectins) Scorpion toxin-like Short-chain scorpion toxins
7.3.6.4 Small proteins Knottins (small inhibitors, toxins, lectins) Scorpion toxin-like Plant defensins
7.39.1.2 Small proteins Glucocorticoid receptor-like (DNA-binding domain) Glucocorticoid receptor-like (DNA-binding domain) Nuclear receptor
7.39.1.3 Small proteins Glucocorticoid receptor-like (DNA-binding domain) Glucocorticoid receptor-like (DNA-binding domain) LIM domain
7.41.5.1 Small proteins Rubredoxin-like Rubredoxin-like Rubredoxin
7.41.5.2 Small proteins Rubredoxin-like Rubredoxin-like Desulforedoxin