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X - Possible homology level

H - Homology level

T - Topology level

F - Family level

* - Provisional representative


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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

X: Immunoglobulin-like beta-sandwich
H: Immunoglobulin-related
T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like
F: Ig_3

PF13927 CL0159

Representatives:

e1cs6A1[A:7-103] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AXONIN-1 ; ligands: GOL ; X-RAY DIFFRACTION 1.8Å

e1cs6A3[A:209-299] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AXONIN-1 ; X-RAY DIFFRACTION 1.8Å

e1epfA2[A:98-189] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (NEURAL CELL ADHESION MOLECULE) ; X-RAY DIFFRACTION 1.85Å

e1rhfA2[A:98-182] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tyrosine-protein kinase receptor TYRO3 ; ligands: ACT,ZN ; X-RAY DIFFRACTION 1.95Å

e1gl4B1[B:1769-1857] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BASEMENT MEMBRANE-SPECIFIC HEPARAN SULFATE PROTEOGLYCAN CORE PROTEIN ; ligands: EPE ; X-RAY DIFFRACTION 2.0Å

e1f97A2[A:129-238] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

JUNCTION ADHESION MOLECULE ; ligands: MG ; X-RAY DIFFRACTION 2.5Å

e1iraY3[Y:205-311] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTERLEUKIN-1 RECEPTOR ; ligands: NAG ; X-RAY DIFFRACTION 2.70Å

e3b5hA1[A:103-203] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cervical EMMPRIN ; X-RAY DIFFRACTION 2.800Å

e1bihA1[A:5-98] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HEMOLIN ; X-RAY DIFFRACTION 3.1Å

e1l6zA2[A:108-203] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BILIARY GLYCOPROTEIN C ; ligands: NAG ; X-RAY DIFFRACTION 3.32Å

e1e07A2[A:108-202] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CARCINOEMBRYONIC ANTIGEN ; SOLUTION SCATTERING

e1e07A4[A:287-380] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CARCINOEMBRYONIC ANTIGEN ; SOLUTION SCATTERING

e1e07A6[A:465-558] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CARCINOEMBRYONIC ANTIGEN ; SOLUTION SCATTERING

e1e07A7[A:559-642] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CARCINOEMBRYONIC ANTIGEN ; SOLUTION SCATTERING

e8f6lC1[C:32-135] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

B- and T-lymphocyte attenuator ; X-RAY DIFFRACTION 1.85Å

e8f6oC1[C:33-133] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

B- and T-lymphocyte attenuator ; X-RAY DIFFRACTION 2.31Å

e8a0yA1[A:511-608] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; X-RAY DIFFRACTION 3.500Å

e8a0yB1[B:511-608] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: NAG ; X-RAY DIFFRACTION 3.500Å

e8a0yC2[C:511-608] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; X-RAY DIFFRACTION 3.500Å

e8a0yA2[A:59-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; X-RAY DIFFRACTION 3.500Å

e8a0yB4[B:59-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; X-RAY DIFFRACTION 3.500Å

e8a0yC5[C:59-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; X-RAY DIFFRACTION 3.500Å

e8a0yA4[A:240-323] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; X-RAY DIFFRACTION 3.500Å

e8a0yB5[B:240-324] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; X-RAY DIFFRACTION 3.500Å

e8a0yC6[C:240-323] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; X-RAY DIFFRACTION 3.500Å

e7yswE1[E:244-351] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: CU ; ELECTRON MICROSCOPY

e5oj2A7[A:532-628] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; ligands: NAG ; X-RAY DIFFRACTION 3.20Å

e5vkmA3[A:240-330] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

B-cell receptor CD22 ; X-RAY DIFFRACTION 2.20Å

e5vkjA1[A:240-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

B-cell receptor CD22 ; ligands: GOL ; X-RAY DIFFRACTION 2.12Å

e5vl3Q3[Q:240-329] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

B-cell receptor CD22 ; X-RAY DIFFRACTION 3.1Å

e5vl3R1[R:240-325] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

B-cell receptor CD22 ; X-RAY DIFFRACTION 3.1Å

e5vl3S2[S:240-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

B-cell receptor CD22 ; ligands: GOL ; X-RAY DIFFRACTION 3.1Å

e5vl3T3[T:240-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

B-cell receptor CD22 ; X-RAY DIFFRACTION 3.1Å

e3qqnA2[A:1-43,A:68-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BASIGIN ; X-RAY DIFFRACTION 2.31Å

e2ensA1[A:1-96] Image Pymol Jmol Links: PDB, SCOP, CATH

Advanced glycosylation end product-specific receptor ; SOLUTION NMR

e2le9A1[A:5-97] Image Pymol Jmol Links: PDB, SCOP, CATH

ADVANCED GLYCOSYLATION END PRODUCT-SPECIFIC RECEPTOR ; SOLUTION NMR

e2le9D1[D:5-97] Image Pymol Jmol Links: PDB, SCOP, CATH

ADVANCED GLYCOSYLATION END PRODUCT-SPECIFIC RECEPTOR ; SOLUTION NMR

e4lp5A7[A:235-321] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Advanced glycosylation end product-specific receptor ; X-RAY DIFFRACTION 3.800Å

e4p2yA2[A:235-321] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Advanced glycosylation end product-specific receptor ; ligands: CL,ZN ; X-RAY DIFFRACTION 2.300Å

e4ybhA2[A:235-322] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Advanced glycosylation end product-specific receptor ; ligands: CL,ZN ; X-RAY DIFFRACTION 2.400Å

e5k6zA1[A:2-90] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2,Protein sidekick-1 chimera ; ligands: CAC,MPD ; X-RAY DIFFRACTION 2.70Å

e5k6zB2[B:2-90] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2,Protein sidekick-1 chimera ; ligands: CAC,MPD,NAG ; X-RAY DIFFRACTION 2.70Å

e5lxkA1[A:72-167] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Decoration protein ; SOLUTION NMR

e5k70A1[A:-1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; ligands: PO4 ; X-RAY DIFFRACTION 2.70Å

e5k70B4[B:0-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; ligands: PO4 ; X-RAY DIFFRACTION 2.70Å

e5k70D2[D:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; ligands: PO4 ; X-RAY DIFFRACTION 2.70Å

e5k6xA4[A:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; ligands: GOL,NAG,SO4 ; X-RAY DIFFRACTION 2.70Å

e5k70C2[C:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; X-RAY DIFFRACTION 2.70Å

e5k6xB1[B:2-89] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; ligands: GOL,NAG,SO4 ; X-RAY DIFFRACTION 2.70Å

e5k6yA1[A:3-89] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; X-RAY DIFFRACTION 3.2Å

e5k6yB4[B:2-89] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; ligands: NAG ; X-RAY DIFFRACTION 3.2Å

e5k6uA1[A:1-90] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-1 ; ligands: IOD,NAG ; X-RAY DIFFRACTION 2.2Å

e5k6vA1[A:1-90] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-1 ; ligands: NAG,ZN ; X-RAY DIFFRACTION 3.2Å

e5k6wA3[A:1-91] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-1 ; ligands: GOL,NAG,SO4 ; X-RAY DIFFRACTION 3.5Å

e5k6wB3[B:1-90] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-1 ; ligands: GOL,NAG,SO4 ; X-RAY DIFFRACTION 3.5Å

e5xx0A3[A:27-109] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; X-RAY DIFFRACTION 2.40Å

e5xwxA3[A:64-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-1 ; X-RAY DIFFRACTION 1.55Å

e5xx0B1[B:27-109] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; X-RAY DIFFRACTION 2.40Å

e5xwxB4[B:64-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-1 ; X-RAY DIFFRACTION 1.55Å

e6lynC2[C:336-431] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cell surface glycoprotein MUC18 ; ligands: EPE,GOL,NAG ; X-RAY DIFFRACTION 2.776Å

e6lynD1[D:336-431] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cell surface glycoprotein MUC18 ; ligands: CL,EPE,NAG ; X-RAY DIFFRACTION 2.776Å

e7o52U1[U:591-682] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CD22 d6-d7 Ig domains ; ligands: GOL,NAG,SO4 ; X-RAY DIFFRACTION 2.410Å

e7tzgD2[D:169-261] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Lymphocyte activation gene 3 protein ; ligands: NAG ; X-RAY DIFFRACTION 3.710Å

e4hwuB1[B:47-127] Image Pymol Jmol Links: PDB, SCOP, CATH

FIBROBLAST GROWTH FACTOR RECEPTOR 2 ; X-RAY DIFFRACTION 2.9Å

e4hwuA1[A:47-127] Image Pymol Jmol Links: PDB, SCOP, CATH

FIBROBLAST GROWTH FACTOR RECEPTOR 2 ; X-RAY DIFFRACTION 2.9Å

e3dmkB4[B:492-582] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Down Syndrome Cell Adhesion Molecule (DSCAM) isoform 1.30.30, N-terminal eight Ig domains ; X-RAY DIFFRACTION 4.19Å

e3dmkC4[C:492-582] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Down Syndrome Cell Adhesion Molecule (DSCAM) isoform 1.30.30, N-terminal eight Ig domains ; X-RAY DIFFRACTION 4.19Å

e3dmkA13[A:492-583] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Down Syndrome Cell Adhesion Molecule (DSCAM) isoform 1.30.30, N-terminal eight Ig domains ; X-RAY DIFFRACTION 4.19Å

e6sffA3[A:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-12 subunit beta ; X-RAY DIFFRACTION 2.4Å

e6smcA1[A:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH

Interleukin-12 subunit beta ; X-RAY DIFFRACTION 3.5Å

e6smcB2[B:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH

Interleukin-12 subunit beta ; X-RAY DIFFRACTION 3.5Å

e6smcC1[C:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH

Interleukin-12 subunit beta ; X-RAY DIFFRACTION 3.5Å

e6smcD2[D:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH

Interleukin-12 subunit beta ; X-RAY DIFFRACTION 3.5Å

e6sp3A1[A:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH

Interleukin-12 subunit beta ; X-RAY DIFFRACTION 2.99Å

e6sp3B2[B:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH

Interleukin-12 subunit beta ; X-RAY DIFFRACTION 2.99Å

e7purA3[A:23-108] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

Interleukin-12 subunit beta ; X-RAY DIFFRACTION 3.88Å

e7purB3[B:23-107] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

Interleukin-12 subunit beta ; X-RAY DIFFRACTION 3.88Å

e7r3nB3[B:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH

Interleukin-12 subunit beta ; X-RAY DIFFRACTION 3.10Å

e7r3nA1[A:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH

Interleukin-12 subunit beta ; X-RAY DIFFRACTION 3.10Å

e7r3nC3[C:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH

Interleukin-12 subunit beta ; X-RAY DIFFRACTION 3.10Å

e7r3nD1[D:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH

Interleukin-12 subunit beta ; X-RAY DIFFRACTION 3.10Å

e3shsA2[A:2-92] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hoc head outer capsid protein ; X-RAY DIFFRACTION 1.95Å

e2wv3A2[A:3-91] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NEUROPLASTIN ; ligands: NAG ; X-RAY DIFFRACTION 1.95Å

e5k6uA2[A:200-290] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-1 ; ligands: IOD,NAG ; X-RAY DIFFRACTION 2.2Å

e5k6vA2[A:200-290] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-1 ; ligands: NAG,ZN ; X-RAY DIFFRACTION 3.2Å

e5k6zA4[A:200-290] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2,Protein sidekick-1 chimera ; ligands: NAG ; X-RAY DIFFRACTION 2.70Å

e5k6zB1[B:200-290] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2,Protein sidekick-1 chimera ; ligands: NAG ; X-RAY DIFFRACTION 2.70Å

e5t89Y5[Y:553-598,Y:618-654] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Vascular endothelial growth factor receptor 1 ; ligands: NAG ; X-RAY DIFFRACTION 4.000Å

e5t89X5[X:521-654] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Vascular endothelial growth factor receptor 1 ; ligands: NAG ; X-RAY DIFFRACTION 4.000Å

e5k6wA4[A:194-284] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-1 ; ligands: FUC,NAG ; X-RAY DIFFRACTION 3.5Å

e5k6wB5[B:197-289] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-1 ; ligands: FUC,GOL,NAG ; X-RAY DIFFRACTION 3.5Å

e5k6xB3[B:189-286] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; ligands: FUC,NAG,SO4 ; X-RAY DIFFRACTION 2.70Å

e5k6yA4[A:189-286] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; ligands: FUC,NAG ; X-RAY DIFFRACTION 3.2Å

e5k6yB2[B:189-286] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; ligands: FUC,NAG ; X-RAY DIFFRACTION 3.2Å

e5k70A3[A:185-282] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; ligands: FUC,NAG,PO4 ; X-RAY DIFFRACTION 2.70Å

e5k70B3[B:185-282] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; ligands: FUC,NAG,PO4 ; X-RAY DIFFRACTION 2.70Å

e5k70D3[D:185-282] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; ligands: FUC,NAG,PO4 ; X-RAY DIFFRACTION 2.70Å

e5k6xA3[A:185-282] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; ligands: FUC,NAG,SO4 ; X-RAY DIFFRACTION 2.70Å

e5k70C3[C:185-282] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; ligands: FUC,NAG,PO4 ; X-RAY DIFFRACTION 2.70Å

e5xwxA4[A:261-351] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-1 ; X-RAY DIFFRACTION 1.55Å

e5xx0A4[A:209-306] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; X-RAY DIFFRACTION 2.40Å

e5xwxB3[B:261-351] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-1 ; X-RAY DIFFRACTION 1.55Å

e5xx0B4[B:209-306] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein sidekick-2 ; X-RAY DIFFRACTION 2.40Å

e5v5vG2[G:132-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; X-RAY DIFFRACTION 4.11Å

e5v5vH1[H:132-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; X-RAY DIFFRACTION 4.11Å

e5v5vI1[I:132-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; X-RAY DIFFRACTION 4.11Å

e5v5vJ2[J:132-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; X-RAY DIFFRACTION 4.11Å

e5v5vK2[K:132-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; X-RAY DIFFRACTION 4.11Å

e5v5vL2[L:132-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; X-RAY DIFFRACTION 4.11Å

e5v5wA2[A:131-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; ligands: SO4 ; X-RAY DIFFRACTION 2.71Å

e5xeqB2[B:130-236] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; ligands: NAG ; X-RAY DIFFRACTION 3.140Å

e5i99A3[A:500-598] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Contactin-3 ; ligands: GOL ; X-RAY DIFFRACTION 2.400Å

e2aw2A1[A:34-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

B AND T LYMPHOCYTE ATTENUATOR ; X-RAY DIFFRACTION 2.8Å

e2aw2X1[X:34-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

B AND T LYMPHOCYTE ATTENUATOR ; X-RAY DIFFRACTION 2.8Å

e3p3yA2[A:137-239] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NEUROFASCIN ; X-RAY DIFFRACTION 2.6Å

e3p40A2[A:137-239] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NEUROFASCIN ; X-RAY DIFFRACTION 3.2Å

e1qz1A2[A:98-189] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Neural cell adhesion molecule 1, 140 kDa isoform ; X-RAY DIFFRACTION 2.0Å

e1epfC2[C:98-189] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (NEURAL CELL ADHESION MOLECULE) ; X-RAY DIFFRACTION 1.85Å

e1epfB2[B:98-189] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (NEURAL CELL ADHESION MOLECULE) ; X-RAY DIFFRACTION 1.85Å

e1epfD2[D:98-189] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (NEURAL CELL ADHESION MOLECULE) ; X-RAY DIFFRACTION 1.85Å

e3ncmA1[A:1-92] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (NEURAL CELL ADHESION MOLECULE, LARGE ISOFORM) ; SOLUTION NMR

e5oj2A3[A:130-236] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; ligands: NAG ; X-RAY DIFFRACTION 3.20Å

e5oj2B3[B:130-236] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; ligands: NAG ; X-RAY DIFFRACTION 3.20Å

e5oj6B3[B:130-236] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; ligands: NAG ; X-RAY DIFFRACTION 3.30Å

e4u7mA2[A:494-596] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Leucine-rich repeats and immunoglobulin-like domains protein 1 ; X-RAY DIFFRACTION 2.7570Å

e2c5dC2[C:27-130] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TYROSINE-PROTEIN KINASE RECEPTOR UFO ; ligands: NI ; X-RAY DIFFRACTION 3.3Å

e2c5dD2[D:27-130] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TYROSINE-PROTEIN KINASE RECEPTOR UFO ; ligands: NI ; X-RAY DIFFRACTION 3.3Å

e4ra0C2[C:27-130] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tyrosine-protein kinase receptor UFO ; X-RAY DIFFRACTION 3.07Å

e4ra0D2[D:27-130] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tyrosine-protein kinase receptor UFO ; X-RAY DIFFRACTION 3.07Å

e5vxzC1[C:27-128] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tyrosine-protein kinase receptor UFO ; X-RAY DIFFRACTION 2.300Å

e5vxzD1[D:27-128] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tyrosine-protein kinase receptor UFO ; ligands: NAG ; X-RAY DIFFRACTION 2.300Å

e6nypA1[A:34-135] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

B- and T-lymphocyte attenuator ; ligands: GOL,NA,SO4 ; X-RAY DIFFRACTION 2.700Å

e6nypB1[B:35-135] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

B- and T-lymphocyte attenuator ; ligands: SO4 ; X-RAY DIFFRACTION 2.700Å

e6nypC1[C:34-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

B- and T-lymphocyte attenuator ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 2.700Å

e6nypD1[D:33-135] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

B- and T-lymphocyte attenuator ; ligands: NA,SO4 ; X-RAY DIFFRACTION 2.700Å

e7ok5B1[B:131-230] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Neurofascin 155 ; X-RAY DIFFRACTION 2.97Å

e7ok5A1[A:131-229] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Neurofascin 155 ; X-RAY DIFFRACTION 2.97Å

e7ol4C1[C:131-229] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Neurofascin ; X-RAY DIFFRACTION 4.795Å

e7ol4D1[D:131-229] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Neurofascin ; X-RAY DIFFRACTION 4.795Å

e8f60C1[C:34-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

B- and T-lymphocyte attenuator ; ligands: ACT ; X-RAY DIFFRACTION 1.64Å

e3s97D3[D:133-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Contactin-1 ; ligands: NAG ; X-RAY DIFFRACTION 2.2970Å

e3s97C3[C:133-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Contactin-1 ; ligands: NAG ; X-RAY DIFFRACTION 2.2970Å

e5e5uB2[B:118-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Contactin-6 ; ligands: ACY,FMT ; X-RAY DIFFRACTION 2.000Å

e5e4iA4[A:192-304] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Contactin-5 ; X-RAY DIFFRACTION 2.600Å

e5f1dA2[A:108-199] Image Pymol Jmol Links: PDB, SCOP, CATH

e5vstA2[A:108-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Biliary glycoprotein ; X-RAY DIFFRACTION 3.098Å

e3kldA2[A:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Contactin 4 ; ligands: NAG ; X-RAY DIFFRACTION 2.000Å

e3jxaA2[A:115-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Contactin 4 ; ligands: NAG ; X-RAY DIFFRACTION 2.400Å

e3jxaB2[B:115-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Contactin 4 ; ligands: NAG ; X-RAY DIFFRACTION 2.400Å

e5e5rD2[D:124-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Contactin-3 ; ligands: MLI ; X-RAY DIFFRACTION 2.600Å

e5e5rB1[B:125-202] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Contactin-3 ; X-RAY DIFFRACTION 2.600Å

e5e5uD1[D:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Contactin-6 ; ligands: ACY,MLI,MLT ; X-RAY DIFFRACTION 2.000Å

e7ol2A3[A:136-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Contactin-1 ; ligands: NAG ; X-RAY DIFFRACTION 3.89Å

e7ol2B3[B:136-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Contactin-1 ; X-RAY DIFFRACTION 3.89Å

e7ol4A5[A:136-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Contactin-1 ; X-RAY DIFFRACTION 4.795Å

e7ol4B2[B:136-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Contactin-1 ; X-RAY DIFFRACTION 4.795Å

e4of8A1[A:25-130] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IRREGULAR CHIASM C-ROUGHEST PROTEIN ; ligands: GOL,NA ; X-RAY DIFFRACTION 1.9Å

e4of8B1[B:26-130] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IRREGULAR CHIASM C-ROUGHEST PROTEIN ; ligands: GOL,NA ; X-RAY DIFFRACTION 1.9Å

e4of8D1[D:26-130] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IRREGULAR CHIASM C-ROUGHEST PROTEIN ; ligands: GOL,NA ; X-RAY DIFFRACTION 1.9Å

e4of8C1[C:25-130] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IRREGULAR CHIASM C-ROUGHEST PROTEIN ; ligands: NA ; X-RAY DIFFRACTION 1.9Å

e6on9B1[B:21-130] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NeuRonal IgCAM-5 ; ligands: FUC,NA,NAG,SO4 ; X-RAY DIFFRACTION 1.995Å

e6onbB1[B:21-130] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NeuRonal IgCAM-5 ; ligands: NAG,SO4 ; X-RAY DIFFRACTION 1.696Å

e6on6A1[A:22-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NeuRonal IgCAM-5 ; ligands: GOL,NAG ; X-RAY DIFFRACTION 1.42Å

e6onbD1[D:21-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NeuRonal IgCAM-5 ; ligands: NAG,SO4 ; X-RAY DIFFRACTION 1.696Å

e7ltwA1[A:19-121] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Kin of IRRE-like protein 2 ; ligands: NA ; X-RAY DIFFRACTION 1.80Å

e7ltwB1[B:19-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Kin of IRRE-like protein 2 ; ligands: NA ; X-RAY DIFFRACTION 1.80Å

e7lu6A1[A:45-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Kin of IRRE-like protein 3 ; ligands: NA ; X-RAY DIFFRACTION 1.95Å

e7lu6C1[C:45-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Kin of IRRE-like protein 3 ; ligands: NA ; X-RAY DIFFRACTION 1.95Å

e4yfdA5[A:237-329] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Receptor-type tyrosine-protein phosphatase delta ; ligands: NAG ; X-RAY DIFFRACTION 3.25Å

e4yfgA5[A:229-317] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Receptor-type tyrosine-protein phosphatase delta ; ligands: NAG ; X-RAY DIFFRACTION 3.491Å

e4rcaA3[A:230-320] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Receptor-type tyrosine-protein phosphatase delta ; ligands: NAG ; X-RAY DIFFRACTION 2.9908Å

e1ry7B1[B:249-357] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FIBROBLAST GROWTH FACTOR RECEPTOR 3 ; X-RAY DIFFRACTION 3.2Å

e5oj6B5[B:457-556] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; ligands: NAG ; X-RAY DIFFRACTION 3.30Å

e4yh7A7[A:222-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Receptor-type tyrosine-protein phosphatase delta ; X-RAY DIFFRACTION 4.4Å

e4wvrA1[A:5-102] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Down syndrome cell adhesion molecule, isoform AK ; X-RAY DIFFRACTION 1.948Å

e4wvrB1[B:4-102] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Down syndrome cell adhesion molecule, isoform AK ; X-RAY DIFFRACTION 1.948Å

e4wvrC1[C:4-102] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Down syndrome cell adhesion molecule, isoform AK ; X-RAY DIFFRACTION 1.948Å

e4wvrD1[D:5-102] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Down syndrome cell adhesion molecule, isoform AK ; X-RAY DIFFRACTION 1.948Å

e4x5lA1[A:1-96] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Down syndrome cell adhesion molecule, isoform AM ; X-RAY DIFFRACTION 2.37Å

e4x5lB1[B:1-96] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Down syndrome cell adhesion molecule, isoform AM ; ligands: NA ; X-RAY DIFFRACTION 2.37Å

e4x5lC1[C:1-96] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Down syndrome cell adhesion molecule, isoform AM ; X-RAY DIFFRACTION 2.37Å

e4x5lD1[D:1-96] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Down syndrome cell adhesion molecule, isoform AM ; ligands: NA ; X-RAY DIFFRACTION 2.37Å

e4yh7A6[A:126-221] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Receptor-type tyrosine-protein phosphatase delta ; X-RAY DIFFRACTION 4.4Å

e3mtrA2[A:401-495] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NEURAL CELL ADHESION MOLECULE 1 ; X-RAY DIFFRACTION 1.8Å

e3mtrB2[B:403-495] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NEURAL CELL ADHESION MOLECULE 1 ; X-RAY DIFFRACTION 1.8Å

e2jllA4[A:399-500] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NEURAL CELL ADHESION MOLECULE 2 ; ligands: CA,NAG ; X-RAY DIFFRACTION 2.3Å

e2xycA1[A:399-493] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NEURAL CELL ADHESION MOLECULE 2 ; ligands: EPE,NAG,PO4 ; X-RAY DIFFRACTION 2.51Å

e3dmkA11[A:676-775] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Down Syndrome Cell Adhesion Molecule (DSCAM) isoform 1.30.30, N-terminal eight Ig domains ; X-RAY DIFFRACTION 4.19Å

e3qr2A1[A:1-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BASIGIN ; X-RAY DIFFRACTION 2.3Å

e3qr2B1[B:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BASIGIN ; X-RAY DIFFRACTION 2.3Å

e3qqnB1[B:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BASIGIN ; X-RAY DIFFRACTION 2.31Å

e5oj2A5[A:422-540] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; ligands: NAG ; X-RAY DIFFRACTION 3.20Å

e3p3yA1[A:37-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NEUROFASCIN ; ligands: NAG ; X-RAY DIFFRACTION 2.6Å

e3p40A1[A:37-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NEUROFASCIN ; ligands: NAG ; X-RAY DIFFRACTION 3.2Å

e2eo9A1[A:1-97] Image Pymol Jmol Links: PDB, SCOP, CATH

Roundabout homolog 1 ; SOLUTION NMR

e3dmkB7[B:583-676] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Down Syndrome Cell Adhesion Molecule (DSCAM) isoform 1.30.30, N-terminal eight Ig domains ; X-RAY DIFFRACTION 4.19Å

e3dmkC7[C:583-676] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Down Syndrome Cell Adhesion Molecule (DSCAM) isoform 1.30.30, N-terminal eight Ig domains ; X-RAY DIFFRACTION 4.19Å

e3so5A1[A:496-600] Image Pymol Jmol Links: PDB, SCOP, CATH

Leucine-rich repeats and immunoglobulin-like domains protein 3 ; ligands: CL,SO4 ; X-RAY DIFFRACTION 1.70Å

e3so5B1[B:0-600] Image Pymol Jmol Links: PDB, SCOP, CATH

Leucine-rich repeats and immunoglobulin-like domains protein 3 ; ligands: CL,SO4 ; X-RAY DIFFRACTION 1.70Å

e3dmkA14[A:584-675] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Down Syndrome Cell Adhesion Molecule (DSCAM) isoform 1.30.30, N-terminal eight Ig domains ; X-RAY DIFFRACTION 4.19Å

e5oj2A6[A:330-421] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; ligands: NAG ; X-RAY DIFFRACTION 3.20Å

e5oj6B4[B:330-456] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAM domain-containing glycosylphosphatidylinositol anchor protein 1 ; ligands: NAG ; X-RAY DIFFRACTION 3.30Å

e4y61A4[A:226-324] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Receptor-type tyrosine-protein phosphatase delta ; ligands: NAG ; X-RAY DIFFRACTION 3.35Å

e5noiA2[A:311-414] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Roundabout homolog 2 ; X-RAY DIFFRACTION 2.4Å

e5wy8A2[A:230-318] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Receptor-type tyrosine-protein phosphatase delta ; ligands: NAG ; X-RAY DIFFRACTION 3.000Å

e5xnpD2[D:221-311] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Receptor-type tyrosine-protein phosphatase delta ; ligands: CL,NAG,SO4 ; X-RAY DIFFRACTION 3.729Å

e5o5gA2[A:350-447] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Roundabout homolog 1 ; X-RAY DIFFRACTION 3.0Å

e5o5iA1[A:454-545] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Roundabout homolog 1 ; X-RAY DIFFRACTION 3.0Å

e5xnpE2[E:221-311] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Receptor-type tyrosine-protein phosphatase delta ; ligands: CL,NAG,SO4 ; X-RAY DIFFRACTION 3.729Å

e5opeA4[A:350-447] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Roundabout homolog 1 ; ligands: PO4 ; X-RAY DIFFRACTION 2.5Å

e5oyjD2[D:322-515] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Vascular endothelial growth factor receptor 2 ; ligands: CA,NAG,TRE ; X-RAY DIFFRACTION 2.38Å

e5oyjC2[C:322-515] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Vascular endothelial growth factor receptor 2 ; ligands: ACT,CA,CAC,NAG,TRE ; X-RAY DIFFRACTION 2.38Å

e5xwuA2[A:237-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Receptor-type tyrosine-protein phosphatase delta ; ligands: NAG ; X-RAY DIFFRACTION 3.18Å

e5xwuC3[C:237-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Receptor-type tyrosine-protein phosphatase delta ; ligands: NAG ; X-RAY DIFFRACTION 3.18Å

Next

e2cryA1[A:8-122] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Kin of IRRE-like protein 3 ; SOLUTION NMR

F: Unmapped domains

Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.

X: Glycosyl hydrolase domain-like

some similarity with Ig fold

beta duplicates or obligate multimersbeta duplicates or monomers associate together to form a compact domain

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