Evolutionary classification of protein domain structures
alpha arraysalpha-helix arrays with mainly perpendicular helices
alpha bundlesalpha-helix bundles with mainly parallel helices
alpha superhelicesrepeating alpha-helix hairpins form a superhelix
alpha duplicates or obligate multimersalpha duplicates or monomers associate together to form a compact domain
alpha complex topologyalpha domain with complex and unique topology that cannot be described as array or bundle or superhelix
beta barrelssingle beta-sheet folded upon itself to form a barrel
beta meanderssingle beta-sheet with mainly meander topology
beta sandwichestwo beta-sheets stacked together to form a sandwich
beta duplicates or obligate multimersbeta duplicates or monomers associate together to form a compact domain
Representatives:
e1knmA1[A:2-130] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ENDO-1,4-BETA-XYLANASE A ; ligands: GOL,LAT ; X-RAY DIFFRACTION 1.2Å
e1dqgA1[A:2-135] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MANNOSE RECEPTOR ; ligands: SO4 ; X-RAY DIFFRACTION 1.7Å
e1vclA1[A:1-150] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
hemolytic lectin CEL-III ; ligands: BTB,CA,MG ; X-RAY DIFFRACTION 1.7Å
e1m2tB1[B:249-384] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
mistletoe lectin I B chain ; ligands: GOL,NAG ; X-RAY DIFFRACTION 1.89Å
e1m2tB2[B:385-510] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
mistletoe lectin I B chain ; ligands: GOL,NAG ; X-RAY DIFFRACTION 1.89Å
e2zqnA1[A:131-260] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
29-KDA GALACTOSE-BINDING LECTIN ; ligands: IMD,PO4 ; X-RAY DIFFRACTION 1.9Å
e1xhbA1[A:423-553] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 1 ; ligands: CA ; X-RAY DIFFRACTION 2.5Å
e1ggpB1[B:141-267] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
PROTEIN (LECTIN 1 B CHAIN) ; X-RAY DIFFRACTION 2.7Å
e4zfyB1[B:134-261] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
rRNA N-glycosidase ; X-RAY DIFFRACTION 2.420Å
e4zgrB1[B:134-261] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
rRNA N-glycosidase ; X-RAY DIFFRACTION 1.97Å
e4zlbB1[B:134-261] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
rRNA N-glycosidase ; X-RAY DIFFRACTION 2.550Å
e6egsB2[B:438-569] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 2 ; X-RAY DIFFRACTION 2.70Å
e6elyB1[B:1-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Mistletoe Lectin I ; ligands: CL,GLY,GOL,NAG ; X-RAY DIFFRACTION 2.84Å
e6elyB2[B:138-263] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Mistletoe Lectin I ; ligands: CL,GLY,GOL,NAG ; X-RAY DIFFRACTION 2.84Å
e5ndfE1[E:430-566] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 2 ; X-RAY DIFFRACTION 2.3Å
e5ndfA2[A:424-569] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 2 ; ligands: EDO,LU2 ; X-RAY DIFFRACTION 2.3Å
e5ndfB2[B:424-569] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 2 ; ligands: LU2 ; X-RAY DIFFRACTION 2.3Å
e5ndfC1[C:424-569] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 2 ; X-RAY DIFFRACTION 2.3Å
e5ndfD1[D:424-569] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 2 ; X-RAY DIFFRACTION 2.3Å
e5ndfF1[F:424-569] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 2 ; ligands: EDO ; X-RAY DIFFRACTION 2.3Å
e5nqaA2[A:440-578] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 4 ; ligands: EDO,NGA ; X-RAY DIFFRACTION 1.90Å
e5xtwC4[C:22-155] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; ligands: MES ; X-RAY DIFFRACTION 3.2Å
e5xtsA3[A:22-154] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; X-RAY DIFFRACTION 2.00Å
e5nqaB2[B:440-578] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 4 ; ligands: EDO,NGA ; X-RAY DIFFRACTION 1.90Å
e5xtwA3[A:23-155] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; ligands: MES ; X-RAY DIFFRACTION 3.2Å
e5xtwB3[B:23-155] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; ligands: MES ; X-RAY DIFFRACTION 3.2Å
e5xtwD4[D:23-155] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; ligands: MES ; X-RAY DIFFRACTION 3.2Å
e5xtwE2[E:22-155] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; ligands: MES ; X-RAY DIFFRACTION 3.2Å
e5xtwF1[F:22-155] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; ligands: MES ; X-RAY DIFFRACTION 3.2Å
e5xtwG4[G:22-155] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; ligands: MES ; X-RAY DIFFRACTION 3.2Å
e5xtwH4[H:22-155] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; ligands: MES ; X-RAY DIFFRACTION 3.2Å
e6egsA1[A:438-570] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 2 ; X-RAY DIFFRACTION 2.70Å
e5y42C2[C:1-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Seed lectin ; ligands: NAG ; X-RAY DIFFRACTION 2.90Å
e5y97C2[C:1-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Seed lectin ; ligands: LAT,NAG ; X-RAY DIFFRACTION 3.05Å
e5y42C1[C:135-264] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Seed lectin ; X-RAY DIFFRACTION 2.90Å
e5y97C1[C:135-264] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Seed lectin ; ligands: LAT ; X-RAY DIFFRACTION 3.05Å
e6h0bA1[A:440-578] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 4 ; X-RAY DIFFRACTION 1.8Å
e6h0bB1[B:440-578] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 4 ; ligands: EDO,NGA ; X-RAY DIFFRACTION 1.8Å
e6e4qB1[B:514-650] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
polypeptide N-acetylgalactosaminyltransferase 9 ; ligands: GOL ; X-RAY DIFFRACTION 2.800Å
e6e4qC1[C:514-650] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
polypeptide N-acetylgalactosaminyltransferase 9 ; X-RAY DIFFRACTION 2.800Å
e6e4qD1[D:514-650] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
polypeptide N-acetylgalactosaminyltransferase 9 ; ligands: EDO ; X-RAY DIFFRACTION 2.800Å
e6e4rA1[A:514-647] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
polypeptide N-acetylgalactosaminyltransferase 9 ; ligands: GOL ; X-RAY DIFFRACTION 2.060Å
e6e4rB2[B:514-647] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
polypeptide N-acetylgalactosaminyltransferase 9 ; ligands: EDO,GOL ; X-RAY DIFFRACTION 2.060Å
e5y42F2[F:1-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Seed lectin ; X-RAY DIFFRACTION 2.90Å
e5y42F1[F:135-264] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Seed lectin ; X-RAY DIFFRACTION 2.90Å
e6iwqA2[A:528-657] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N-acetylgalactosaminyltransferase 7 ; X-RAY DIFFRACTION 2.95Å
e6iwqB1[B:528-657] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N-acetylgalactosaminyltransferase 7 ; X-RAY DIFFRACTION 2.95Å
e6iwqC2[C:528-657] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N-acetylgalactosaminyltransferase 7 ; X-RAY DIFFRACTION 2.95Å
e6iwqD1[D:528-657] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N-acetylgalactosaminyltransferase 7 ; X-RAY DIFFRACTION 2.95Å
e6iwqE1[E:528-657] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N-acetylgalactosaminyltransferase 7 ; X-RAY DIFFRACTION 2.95Å
e6iwqF2[F:528-657] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N-acetylgalactosaminyltransferase 7 ; X-RAY DIFFRACTION 2.95Å
e6iwrA2[A:528-657] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N-acetylgalactosaminyltransferase 7 ; X-RAY DIFFRACTION 2.604Å
e6iwrB2[B:528-657] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N-acetylgalactosaminyltransferase 7 ; X-RAY DIFFRACTION 2.604Å
e6iwrC1[C:528-657] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N-acetylgalactosaminyltransferase 7 ; X-RAY DIFFRACTION 2.604Å
e6iwrD2[D:528-657] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N-acetylgalactosaminyltransferase 7 ; ligands: UD2 ; X-RAY DIFFRACTION 2.604Å
e6iwrE2[E:528-657] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N-acetylgalactosaminyltransferase 7 ; X-RAY DIFFRACTION 2.604Å
e6iwrF1[F:528-657] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N-acetylgalactosaminyltransferase 7 ; X-RAY DIFFRACTION 2.604Å
e6pxuB2[B:441-581] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 12 ; ligands: A2G,EDO,GOL ; X-RAY DIFFRACTION 2.007Å
e6inoA3[A:22-154] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; X-RAY DIFFRACTION 3.05Å
e6inoB3[B:22-154] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; X-RAY DIFFRACTION 3.05Å
e6inuA1[A:23-154] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; X-RAY DIFFRACTION 2.65Å
e6inuB3[B:22-154] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; X-RAY DIFFRACTION 2.65Å
e6invA2[A:24-154] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; X-RAY DIFFRACTION 3.30Å
e6ioeA1[A:22-154] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; X-RAY DIFFRACTION 2.9Å
e6ioeB1[B:22-154] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; X-RAY DIFFRACTION 2.9Å
e6innB3[B:22-155] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; X-RAY DIFFRACTION 3.00Å
e6innC3[C:22-155] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; X-RAY DIFFRACTION 3.00Å
e6innD3[D:22-155] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Macrophage mannose receptor 1 ; X-RAY DIFFRACTION 3.00Å
e6pxuA2[A:441-581] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 12 ; ligands: A2G ; X-RAY DIFFRACTION 2.007Å
e6s22A2[A:499-630] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase ; ligands: EDO,NGA ; X-RAY DIFFRACTION 1.96Å
e6s24A1[A:499-630] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase ; ligands: NGA,PO4 ; X-RAY DIFFRACTION 2.12Å
e6nqtA1[A:438-569] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 2 ; X-RAY DIFFRACTION 3.05Å
e6e7iA2[A:438-568] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 2 ; X-RAY DIFFRACTION 1.8Å
e6nqtB2[B:438-569] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 2 ; X-RAY DIFFRACTION 3.05Å
e6nqtC1[C:438-569] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 2 ; X-RAY DIFFRACTION 3.05Å
e6nqtD2[D:438-569] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 2 ; X-RAY DIFFRACTION 3.05Å
e6nqtE1[E:438-569] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 2 ; X-RAY DIFFRACTION 3.05Å
e6nqtF1[F:438-569] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Polypeptide N-acetylgalactosaminyltransferase 2 ; X-RAY DIFFRACTION 3.05Å
e7kd0B2[B:136-262] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ricin chain B ; ligands: CL ; X-RAY DIFFRACTION 2.7680Å
e7kbiB2[B:137-262] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ricin chain B ; X-RAY DIFFRACTION 3.049Å
e7kbkB2[B:136-262] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ricin ; ligands: EDO ; X-RAY DIFFRACTION 2.090Å
e7kc9B2[B:136-262] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ricin chain B ; X-RAY DIFFRACTION 2.300Å
e7kc9E2[E:136-262] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ricin chain B ; X-RAY DIFFRACTION 2.300Å
e7kd2B2[B:136-262] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ricin chain B ; ligands: CL,ZN ; X-RAY DIFFRACTION 2.5460Å
e7kdmB2[B:136-262] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ricin chain B ; X-RAY DIFFRACTION 2.300Å
e7kdmE2[E:136-262] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ricin chain B ; X-RAY DIFFRACTION 2.300Å
e7kduB2[B:136-262] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ricin chain B ; ligands: EDO ; X-RAY DIFFRACTION 2.800Å
e7yl9H1[H:460-582] Image Pymol Jmol Links: PDB, SCOP, CATH
Hemolysin ; ELECTRON MICROSCOPY
e7yl9I1[I:460-582] Image Pymol Jmol Links: PDB, SCOP, CATH
Hemolysin ; ELECTRON MICROSCOPY
e7yl9J3[J:460-582] Image Pymol Jmol Links: PDB, SCOP, CATH
Hemolysin ; ELECTRON MICROSCOPY
e7yl9K2[K:460-582] Image Pymol Jmol Links: PDB, SCOP, CATH
Hemolysin ; ELECTRON MICROSCOPY
e7yl9L2[L:460-582] Image Pymol Jmol Links: PDB, SCOP, CATH
Hemolysin ; ELECTRON MICROSCOPY
e7yl9M3[M:460-582] Image Pymol Jmol Links: PDB, SCOP, CATH
Hemolysin ; ELECTRON MICROSCOPY
e7yl9N1[N:460-582] Image Pymol Jmol Links: PDB, SCOP, CATH
Hemolysin ; ELECTRON MICROSCOPY
e8jbqA2[A:456-578] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å
PreviousPseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
beta complex topologybeta domains with complex and unique topology that cannot be described as barrel or sandwich or meander
a+b two layersone alpha-helix layer and one beta-sheet layer
a+b three layersone mainly antiparallel beta-sheet layer sandwiched between two alpha-helix layers
a+b four layerstwo beta-sheet layers sandwiched between two alpha-helix layers
a+b complex topologyalpha and beta domain with complex and unique topology that cannot be described in layers
a+b duplicates or obligate multimersalpha and beta duplicates or monomers associated together to form a compact domain
a/b barrelsrepeating beta-alpha units form a barrel
a/b three-layered sandwichesrepeating beta-alpha units form a sandwich with a mainly parallel beta-sheet layer stacked between two alpha-helix layers
mixed a+b and a/balpha and beta domain consists of both a+b and a/b regions
few secondary structure elementsstabilized by cofactors or disulfides
extended segmentsextended, non-globular segments, frequently bind to other proteins to form complexes