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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: C1-set

PF07654 CL0159

Representatives:

e1k5nA1[A:182-276] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MAJOR HISTOCOMPATIBILITY COMPLEX MOLECULE HLA-B*2709 ; X-RAY DIFFRACTION 1.09Å

e1k5nB1[B:0-99] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-2-MICROGLOBULIN, LIGHT CHAIN ; ligands: GOL ; X-RAY DIFFRACTION 1.09Å

e1mjuH2[H:114-230] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IMMUNOGLOBULIN MS6-12 ; ligands: GOL ; X-RAY DIFFRACTION 1.22Å

e1mjuL2[L:108-214] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IMMUNOGLOBULIN MS6-12 ; ligands: GOL ; X-RAY DIFFRACTION 1.22Å

e1ogaE2[E:119-245] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

T-CELL RECEPTOR BETA CHAIN C REGION ; X-RAY DIFFRACTION 1.4Å

e1l6xA1[A:237-341] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

IMMUNOGLOBULIN GAMMA-1 HEAVY CHAIN CONSTANT REGION ; X-RAY DIFFRACTION 1.65Å

e1l6xA2[A:342-443] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

IMMUNOGLOBULIN GAMMA-1 HEAVY CHAIN CONSTANT REGION ; X-RAY DIFFRACTION 1.65Å

e6txzK1[K:118-220] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab H ; X-RAY DIFFRACTION 3.060Å

e6ylaH1[H:118-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heavy Chain ; ligands: DMS,MLI ; X-RAY DIFFRACTION 2.42Å

e6txzH1[H:118-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab H ; X-RAY DIFFRACTION 3.060Å

e6txzJ2[J:118-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab H ; X-RAY DIFFRACTION 3.060Å

e6utaA2[A:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Z004 iGL Fab heavy chain ; X-RAY DIFFRACTION 3.1Å

e6uteC2[C:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Z032 Fab heavy chain ; X-RAY DIFFRACTION 2.9Å

e6uteA2[A:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Z032 Fab heavy chain ; X-RAY DIFFRACTION 2.9Å

e6uteE1[E:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Z032 Fab heavy chain ; ligands: GOL ; X-RAY DIFFRACTION 2.9Å

e6uteG2[G:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Z032 Fab heavy chain ; X-RAY DIFFRACTION 2.9Å

e6w03H2[H:111-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3H109L Fab heavy chain ; X-RAY DIFFRACTION 2.37Å

e6p6dB1[B:342-444] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IgG1 Fc fragment ; X-RAY DIFFRACTION 2.3Å

e6ulcH2[H:114-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

antibody PG16 Fab heavy chain ; ELECTRON MICROSCOPY

e6vrtH2[H:114-217] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

Sonepcizumab antibody Fab fragment, heavy chain ; X-RAY DIFFRACTION 2.550Å

e6ym0H1[H:118-220] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

heavy chain ; X-RAY DIFFRACTION 4.36Å

e6m58H1[H:114-221] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heavy chain of the SL335 antibody fab ; X-RAY DIFFRACTION 2.95Å

e6usfH1[H:128-229] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab heavy chain ; ELECTRON MICROSCOPY

e6s3dA1[A:126-224] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heavy Chain ; X-RAY DIFFRACTION 3Å

e6s3dC2[C:126-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heavy Chain ; X-RAY DIFFRACTION 3Å

e6s3dE1[E:126-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heavy Chain ; X-RAY DIFFRACTION 3Å

e6s3dH2[H:126-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heavy Chain ; X-RAY DIFFRACTION 3Å

e6xxvA2[A:139-239] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Antibody C57, Heavy Chain ; X-RAY DIFFRACTION 2.2Å

e6xxvD2[D:139-243] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Antibody C57, Heavy Chain ; X-RAY DIFFRACTION 2.2Å

e6uygA1[A:114-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab E1 heavy chain ; X-RAY DIFFRACTION 3.3750Å

e6uydH1[H:101-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab AR3C heavy chain ; X-RAY DIFFRACTION 1.8970Å

e6uydA1[A:101-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab AR3C heavy chain ; X-RAY DIFFRACTION 1.8970Å

e6uymH2[H:101-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab AR3C heavy chain ; X-RAY DIFFRACTION 2.8480Å

e6uymA2[A:101-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab AR3C heavy chain ; X-RAY DIFFRACTION 2.8480Å

e6yorH2[H:118-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IgG H chain ; ELECTRON MICROSCOPY

e6yorB1[B:118-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IgG H chain ; ELECTRON MICROSCOPY

e6u6uH1[H:120-221] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BI00655130 Fab heavy chain ; X-RAY DIFFRACTION 2.310Å

e6uygH2[H:101-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab AR3A heavy chain ; X-RAY DIFFRACTION 3.3750Å

e6uyfH1[H:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab AR3B heavy chain ; X-RAY DIFFRACTION 2.06Å

e6usfK2[K:128-229] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab heavy chain ; ELECTRON MICROSCOPY

e6w7yA1[A:120-221] Image Pymol Jmol Links: PDB, SCOP, CATH

CR3022 Heavy chain ; X-RAY DIFFRACTION 3.3Å

e6m58C2[C:114-220] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heavy chain of the SL335 antibody fab ; X-RAY DIFFRACTION 2.95Å

e6u9sA1[A:120-221] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

5A6 FAB Heavy Chain ; X-RAY DIFFRACTION 2.40Å

e7bz5H1[H:116-217] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heavy chain of B38 ; X-RAY DIFFRACTION 1.84Å

e6vgrC1[C:124-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SC-003 Fab Heavy Chain ; X-RAY DIFFRACTION 2.84Å

e6p60B2[B:112-212] Image Pymol Jmol Links: PDB, SCOP, CATH

Antibody A12V163-a.02 light chain ; X-RAY DIFFRACTION 2.500Å

e6p60D1[D:112-212] Image Pymol Jmol Links: PDB, SCOP, CATH

Antibody A12V163-a.02 light chain ; X-RAY DIFFRACTION 2.500Å

e6p60H1[H:112-212] Image Pymol Jmol Links: PDB, SCOP, CATH

Antibody A12V163-a.02 light chain ; X-RAY DIFFRACTION 2.500Å

e6p60K2[K:112-212] Image Pymol Jmol Links: PDB, SCOP, CATH

Antibody A12V163-a.02 light chain ; X-RAY DIFFRACTION 2.500Å

e6pefB2[B:111-212] Image Pymol Jmol Links: PDB, SCOP, CATH

antibody DF2F-a.01 light chain ; X-RAY DIFFRACTION 2.000Å

e6pefE1[E:111-212] Image Pymol Jmol Links: PDB, SCOP, CATH

antibody DF2F-a.01 light chain ; X-RAY DIFFRACTION 2.000Å

e6w3hA1[A:342-444] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATV Fc ; X-RAY DIFFRACTION 3.38Å

e6w3hB1[B:342-443] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATV Fc ; X-RAY DIFFRACTION 3.38Å

e7cbpD1[D:123-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab Heavy chain ; ELECTRON MICROSCOPY

e7cbpR2[R:123-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab Heavy chain ; ELECTRON MICROSCOPY

e6ka7D1[D:342-445] Image Pymol Jmol Links: PDB, SCOP, CATH

Immunoglobulin gamma-1 heavy chain ; X-RAY DIFFRACTION 3.000Å

e6wiyH2[H:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab 54-1G05 heavy chain ; ligands: GOL ; X-RAY DIFFRACTION 1.650Å

e6wizH2[H:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab 54-1G05 heavy chain ; X-RAY DIFFRACTION 4.200Å

e6p8dA1[A:117-216] Image Pymol Jmol Links: PDB, SCOP, CATH

Antibody VFP6.01 heavy chain ; X-RAY DIFFRACTION 2.100Å

e6p8dD2[D:117-216] Image Pymol Jmol Links: PDB, SCOP, CATH

Antibody VFP6.01 heavy chain ; X-RAY DIFFRACTION 2.100Å

e6xdgC2[C:121-220] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

REGN10987 antibody Fab fragment heavy chain ; ELECTRON MICROSCOPY

e6srvHHH2[HHH:114-217] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab C0021144 heavy chain (IgG1) ; ligands: EDO,PEG,TRS ; X-RAY DIFFRACTION 2.40Å

e6srvIII1[III:114-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab C0021144 heavy chain (IgG1) ; ligands: EDO,PEG ; X-RAY DIFFRACTION 2.40Å

e6ss4HHH2[HHH:114-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab C0021181 heavy chain (IgG1) ; X-RAY DIFFRACTION 2.90Å

e6ss5HHH2[HHH:114-220] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab C0020187 heavy chain (IgG1) ; ligands: CL,EPE ; X-RAY DIFFRACTION 1.78Å

e6wj0H2[H:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab 54-4H03 heavy chain ; ligands: GOL ; X-RAY DIFFRACTION 1.800Å

e6wj1H2[H:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab 54-4H03 heavy chain ; X-RAY DIFFRACTION 3.500Å

e6wj1J1[J:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab 54-4H03 heavy chain ; X-RAY DIFFRACTION 3.500Å

e6wj1G1[G:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab 54-4H03 heavy chain ; X-RAY DIFFRACTION 3.500Å

e6u9sD2[D:120-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

5A6 FAB Heavy Chain ; X-RAY DIFFRACTION 2.40Å

e6tkoH1[H:124-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab30 heavy chain ; ELECTRON MICROSCOPY

e6pduH2[H:114-217] Image Pymol Jmol Links: PDB, SCOP, CATH

antibody 13N024-a.01, heavy chain ; X-RAY DIFFRACTION 1.950Å

e6plhB1[B:119-221] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab 5G12 heavy chain ; X-RAY DIFFRACTION 1.600Å

e6p4aH2[H:114-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HyHEL10 Fab heavy chain ; X-RAY DIFFRACTION 2.200Å

e6ohgC2[C:120-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4F12 Heavy chain ; ligands: ACY,EDO,GOL,PDO ; X-RAY DIFFRACTION 2.385Å

e6sf6H2[H:124-222] Image Pymol Jmol Links: PDB, SCOP, CATH

COMP-reactive monoclonal antibody 15A Fab fragment, heavy chain ; X-RAY DIFFRACTION 1.900Å

e6sf6A1[A:124-222] Image Pymol Jmol Links: PDB, SCOP, CATH

COMP-reactive monoclonal antibody 15A Fab fragment, heavy chain ; X-RAY DIFFRACTION 1.900Å

e6ltgA2[A:123-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

antibody Fab fragment H-chain ; X-RAY DIFFRACTION 1.630Å

e6ltgC1[C:123-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

antibody Fab fragment H-chain ; X-RAY DIFFRACTION 1.630Å

e6lktA1[A:114-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

antibody Fab fragment H chain ; X-RAY DIFFRACTION 1.800Å

e6ulfA1[A:128-230] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4498 Fab heavy chain ; X-RAY DIFFRACTION 1.70Å

e6vlnH1[H:114-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4498 Fab heavy chain ; X-RAY DIFFRACTION 1.63Å

e7bwjH2[H:128-229] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

antibody heavy chain ; X-RAY DIFFRACTION 2.85Å

e6w16H2[H:129-232] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

458 Fab heavy chain ; X-RAY DIFFRACTION 3.1Å

e6ws6A2[A:128-229] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

S309 antigen-binding (Fab) fragment, heavy chain ; X-RAY DIFFRACTION 3.300Å

e6ws6C2[C:128-224] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

S309 antigen-binding (Fab) fragment, heavy chain ; X-RAY DIFFRACTION 3.300Å

e6ws6E1[E:128-229] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

S309 antigen-binding (Fab) fragment, heavy chain ; X-RAY DIFFRACTION 3.300Å

e7bxaB2[B:119-220] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

heavy chain ; X-RAY DIFFRACTION 3.32Å

e7bxaH1[H:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

heavy chain ; X-RAY DIFFRACTION 3.32Å

e6pdrH1[H:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH

antibody vFP25.18 heavy chain ; X-RAY DIFFRACTION 1.580Å

e7c01H2[H:120-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CB6 heavy chain ; X-RAY DIFFRACTION 2.88Å

e7c01C1[C:120-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CB6 heavy chain ; X-RAY DIFFRACTION 2.88Å

e6xc4H1[H:114-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CC12.3 heavy chain ; X-RAY DIFFRACTION 2.33Å

e6xc4X1[X:114-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CC12.3 heavy chain ; X-RAY DIFFRACTION 2.33Å

e6xc7C2[C:114-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CC12.3 heavy chain ; X-RAY DIFFRACTION 2.88Å

e6o24A2[A:114-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4498 Fab heavy chain ; ligands: EDO ; X-RAY DIFFRACTION 1.4Å

e6ofiH2[H:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CH55 Fab heavy chain ; X-RAY DIFFRACTION 3.850Å

e6w0aA1[A:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab Heavy Chain ; X-RAY DIFFRACTION 3.2Å

e6w0bA1[A:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab Heavy Chain ; X-RAY DIFFRACTION 3.6Å

e6w0cA2[A:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab Heavy Chain ; X-RAY DIFFRACTION 3.5Å

e6w0dA1[A:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab Heavy Chain ; X-RAY DIFFRACTION 3.6Å

e6w0eA2[A:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab Heavy Chain ; X-RAY DIFFRACTION 3.5Å

e6w0fA1[A:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab Heavy Chain ; X-RAY DIFFRACTION 2.4Å

e6w0gA1[A:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab Heavy Chain ; X-RAY DIFFRACTION 2.6Å

e6w0hA1[A:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab Heavy Chain ; X-RAY DIFFRACTION 2.6Å

e6w0iA1[A:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab Heavy Chain ; X-RAY DIFFRACTION 2.3Å

e6w0jA1[A:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab Heavy Chain ; X-RAY DIFFRACTION 2.5Å

e6xc3H1[H:114-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CR3022 heavy chain ; X-RAY DIFFRACTION 2.698Å

e6xc7H2[H:114-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CR3022 heavy chain ; X-RAY DIFFRACTION 2.88Å

e6yz7BBB1[BBB:118-219] Image Pymol Jmol Links: PDB, SCOP, CATH

Antibody Cr3022 ; X-RAY DIFFRACTION 3.29Å

e6yz7HHH2[HHH:118-219] Image Pymol Jmol Links: PDB, SCOP, CATH

Antibody Cr3022 ; X-RAY DIFFRACTION 3.29Å

e6z2mB1[B:118-219] Image Pymol Jmol Links: PDB, SCOP, CATH

CR3022 antibody ; X-RAY DIFFRACTION 2.71Å

e6z2mH1[H:118-219] Image Pymol Jmol Links: PDB, SCOP, CATH

CR3022 antibody ; X-RAY DIFFRACTION 2.71Å

e6ktrA2[A:120-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

G1A8-Fab-HC ; X-RAY DIFFRACTION 2.59Å

e6ktrF1[F:120-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

G1A8-Fab-HC ; X-RAY DIFFRACTION 2.59Å

e6ss6JJJ2[JJJ:114-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab C0020187 heavy chain (IgG1) ; X-RAY DIFFRACTION 3.25Å

e6srxHHH1[HHH:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab C0021158 heavy chain (IgG1) ; ligands: ACT ; X-RAY DIFFRACTION 1.90Å

e6srxIII1[III:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab C0021158 heavy chain (IgG1) ; X-RAY DIFFRACTION 1.90Å

e6ss0HHH2[HHH:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab C0021181 heavy chain (IgG1) ; ligands: SIN ; X-RAY DIFFRACTION 1.70Å

e6ss0III2[III:114-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab C0021181 heavy chain (IgG1) ; X-RAY DIFFRACTION 1.70Å

e6ss2HHH1[HHH:114-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab C0021158 heavy chain (IgG1) ; ligands: GOL ; X-RAY DIFFRACTION 2.40Å

e6ss6HHH2[HHH:114-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab C0020187 heavy chain (IgG1) ; ligands: SO4 ; X-RAY DIFFRACTION 3.25Å

e6ss6III1[III:114-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab C0020187 heavy chain (IgG1) ; X-RAY DIFFRACTION 3.25Å

e6tulHHH2[HHH:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab C0021177 heavy chain (IgG1) ; ligands: MLT,P6G,PG4 ; X-RAY DIFFRACTION 2.25Å

e6xc2H2[H:115-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CC12.1 heavy chain ; X-RAY DIFFRACTION 3.11Å

e6xc2X2[X:115-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CC12.1 heavy chain ; X-RAY DIFFRACTION 3.11Å

e6xc3B1[B:114-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CC12.1 heavy chain ; X-RAY DIFFRACTION 2.698Å

e6xcaH1[H:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C105 Heavy Chain ; X-RAY DIFFRACTION 1.800Å

e6xe1H2[H:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CV30 Fab Heavy chain ; X-RAY DIFFRACTION 2.75Å

e6p7hA2[A:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH

Antibody DF2F-b.04 heavy chain ; X-RAY DIFFRACTION 1.780Å

e6pdsB2[B:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH

antibody 0PV-a.04 heavy chain ; X-RAY DIFFRACTION 1.900Å

e6pdsH1[H:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH

antibody 0PV-a.04 heavy chain ; ligands: SO4 ; X-RAY DIFFRACTION 1.900Å

e6pecH1[H:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH

antibody heavy chain ; X-RAY DIFFRACTION 1.740Å

e6p9hC2[C:109-220] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Human anti staphylococcus aureus antibody STAU-281 Fab heavy chain ; X-RAY DIFFRACTION 3.00Å

e6p9hH2[H:109-220] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Human anti staphylococcus aureus antibody STAU-281 Fab heavy chain ; X-RAY DIFFRACTION 3.00Å

e6xdgB2[B:121-220] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

REGN10933 antibody Fab fragment heavy chain ; ELECTRON MICROSCOPY

e6rp8h1[h:119-218] Image Pymol Jmol Links: PDB, SCOP, CATH

Antibody Ipilimumab heavy chain ; X-RAY DIFFRACTION 2.60Å

e6rp8H2[H:119-218] Image Pymol Jmol Links: PDB, SCOP, CATH

Antibody Ipilimumab heavy chain ; X-RAY DIFFRACTION 2.60Å

e6zczH1[H:122-224] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EY6A heavy chain ; ligands: MG ; X-RAY DIFFRACTION 2.64Å

e6zdhH2[H:122-224] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EY6A heavy chain ; ELECTRON MICROSCOPY

e6zdhD2[D:122-224] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EY6A heavy chain ; ELECTRON MICROSCOPY

e6zdhG1[G:122-224] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EY6A heavy chain ; ELECTRON MICROSCOPY

e6zerH1[H:122-224] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EY6A heavy chain ; X-RAY DIFFRACTION 3.8Å

e6zerB2[B:122-224] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EY6A heavy chain ; X-RAY DIFFRACTION 3.8Å

e6zerF1[F:122-224] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EY6A heavy chain ; X-RAY DIFFRACTION 3.8Å

e6zfoH2[H:122-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EY6A heavy chain ; ELECTRON MICROSCOPY

e6zfoB1[B:122-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EY6A heavy chain ; ELECTRON MICROSCOPY

e6vgrH1[H:124-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SC-003 Fab Heavy Chain ; X-RAY DIFFRACTION 2.84Å

e6p3rA1[A:130-230] Image Pymol Jmol Links: PDB, SCOP, CATH

human Fab H5.31 heavy chain ; X-RAY DIFFRACTION 3.00Å

e6p3rC1[C:130-230] Image Pymol Jmol Links: PDB, SCOP, CATH

human Fab H5.31 heavy chain ; ligands: PO4 ; X-RAY DIFFRACTION 3.00Å

e6p3sA1[A:130-230] Image Pymol Jmol Links: PDB, SCOP, CATH

Human Fab H5.28 heavy chain ; X-RAY DIFFRACTION 4.00Å

e6p3sC2[C:130-229] Image Pymol Jmol Links: PDB, SCOP, CATH

Human Fab H5.28 heavy chain ; X-RAY DIFFRACTION 4.00Å

e6p3sF1[F:130-227] Image Pymol Jmol Links: PDB, SCOP, CATH

Human Fab H5.28 heavy chain ; X-RAY DIFFRACTION 4.00Å

e6p3sI1[I:130-230] Image Pymol Jmol Links: PDB, SCOP, CATH

Human Fab H5.28 heavy chain ; X-RAY DIFFRACTION 4.00Å

e6p3sM2[M:133-232] Image Pymol Jmol Links: PDB, SCOP, CATH

Human Fab H5.28 heavy chain ; X-RAY DIFFRACTION 4.00Å

e6p3sP2[P:133-232] Image Pymol Jmol Links: PDB, SCOP, CATH

Human Fab H5.28 heavy chain ; X-RAY DIFFRACTION 4.00Å

e6p3sS2[S:133-229] Image Pymol Jmol Links: PDB, SCOP, CATH

Human Fab H5.28 heavy chain ; X-RAY DIFFRACTION 4.00Å

e6p3sV2[V:133-227] Image Pymol Jmol Links: PDB, SCOP, CATH

Human Fab H5.28 heavy chain ; X-RAY DIFFRACTION 4.00Å

e6p9jH2[H:130-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

human anti staphylococcus aureus antibody STAU-229 Fab heavy chain ; ligands: TAM ; X-RAY DIFFRACTION 2.20Å

e6p9jA1[A:130-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

human anti staphylococcus aureus antibody STAU-229 Fab heavy chain ; X-RAY DIFFRACTION 2.20Å

e6o28A1[A:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4493 Fab heavy chain ; X-RAY DIFFRACTION 1.93Å

e6o28C2[C:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4493 Fab heavy chain ; ligands: EDO ; X-RAY DIFFRACTION 1.93Å

e6o29A2[A:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4493 Fab heavy chain ; ligands: EDO ; X-RAY DIFFRACTION 2.4Å

e6o29H2[H:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4493 Fab heavy chain ; X-RAY DIFFRACTION 2.4Å

e6o2aA2[A:114-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4493 Fab heavy chain ; X-RAY DIFFRACTION 2.15Å

e6o2aC2[C:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4493 Fab heavy chain ; ligands: EDO ; X-RAY DIFFRACTION 2.15Å

e6o2aH2[H:114-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4493 Fab heavy chain ; X-RAY DIFFRACTION 2.15Å

e6o2aO1[O:114-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4493 Fab heavy chain ; ligands: EDO ; X-RAY DIFFRACTION 2.15Å

e6o2bA2[A:114-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4493 Fab heavy chain ; ligands: ACT ; X-RAY DIFFRACTION 2.1Å

e6o2bC2[C:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4493 Fab heavy chain ; X-RAY DIFFRACTION 2.1Å

e6o2bH1[H:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4493 Fab heavy chain ; X-RAY DIFFRACTION 2.1Å

e6o2bO1[O:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4493 Fab heavy chain ; X-RAY DIFFRACTION 2.1Å

e6o2cA1[A:114-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4493 Fab heavy chain ; ligands: EDO ; X-RAY DIFFRACTION 2.017Å

e6ka7C2[C:342-443] Image Pymol Jmol Links: PDB, SCOP, CATH

Immunoglobulin gamma-1 heavy chain ; X-RAY DIFFRACTION 3.000Å

e6m3bC2[C:125-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

c25k23 Fab H chain ; X-RAY DIFFRACTION 2.2Å

e6p60A2[A:123-222] Image Pymol Jmol Links: PDB, SCOP, CATH

Antibody A12V163-a.02 heavy chain ; X-RAY DIFFRACTION 2.500Å

e6p60C1[C:123-222] Image Pymol Jmol Links: PDB, SCOP, CATH

Antibody A12V163-a.02 heavy chain ; X-RAY DIFFRACTION 2.500Å

e6p60G1[G:123-222] Image Pymol Jmol Links: PDB, SCOP, CATH

Antibody A12V163-a.02 heavy chain ; X-RAY DIFFRACTION 2.500Å

e6p60J2[J:123-222] Image Pymol Jmol Links: PDB, SCOP, CATH

Antibody A12V163-a.02 heavy chain ; X-RAY DIFFRACTION 2.500Å

e6pefA2[A:121-220] Image Pymol Jmol Links: PDB, SCOP, CATH

antibody DF2F-a.01 heavy chain ; X-RAY DIFFRACTION 2.000Å

e6pefD1[D:121-220] Image Pymol Jmol Links: PDB, SCOP, CATH

antibody DF2F-a.01 heavy chain ; X-RAY DIFFRACTION 2.000Å

e6ur5A1[A:128-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Antibody heavy chain ; X-RAY DIFFRACTION 4.000Å

e6ur5G1[G:128-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Antibody heavy chain ; X-RAY DIFFRACTION 4.000Å

e6p4bH1[H:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HyHEL10 Fab heavy chain ; ligands: CL ; X-RAY DIFFRACTION 1.810Å

e6p4bB2[B:114-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HyHEL10 Fab heavy chain ; ligands: CL ; X-RAY DIFFRACTION 1.810Å

e6p4cH1[H:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HyHEL10 Fab heavy chain ; ligands: CL ; X-RAY DIFFRACTION 1.850Å

e6p9iA1[A:125-226] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

human anti staphylococcus aureus antibody STAU-399 Fab heavy chain ; X-RAY DIFFRACTION 2.40Å

e6p9iC2[C:125-226] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

human anti staphylococcus aureus antibody STAU-399 Fab heavy chain ; X-RAY DIFFRACTION 2.40Å

e6o25A2[A:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3945 Fab heavy chain ; X-RAY DIFFRACTION 2.9Å

e6o25E1[E:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3945 Fab heavy chain ; X-RAY DIFFRACTION 2.9Å

e6o25I1[I:114-213] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3945 Fab heavy chain ; X-RAY DIFFRACTION 2.9Å

e6uleA1[A:114-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

2541 Antibody, heavy chain ; X-RAY DIFFRACTION 2.55Å

e6uleC1[C:114-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

2541 Antibody, heavy chain ; X-RAY DIFFRACTION 2.55Å

e6x5mh2[h:126-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heavy chain Fab Bl-3 6 ; X-RAY DIFFRACTION 2.5Å

e6x5mH1[H:126-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heavy chain Fab Bl-3 6 ; X-RAY DIFFRACTION 2.5Å

e6x5nh2[h:126-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heavy chain Fab Bl-3 6 ; X-RAY DIFFRACTION 3.30Å

e6x5nH2[H:126-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heavy chain Fab Bl-3 6 ; X-RAY DIFFRACTION 3.30Å

e7c2lH2[H:129-229] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

heavy chain of 4A8 ; ELECTRON MICROSCOPY

e7c2lI2[I:129-229] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

heavy chain of 4A8 ; ELECTRON MICROSCOPY

e7c2lJ2[J:129-229] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

heavy chain of 4A8 ; ELECTRON MICROSCOPY

e6m3cH2[H:119-221] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

h1573 Fab L chain ; X-RAY DIFFRACTION 3.7Å

e6m3cF2[F:119-221] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

h1573 Fab L chain ; X-RAY DIFFRACTION 3.7Å

e6m3cK2[K:119-221] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

h1573 Fab L chain ; X-RAY DIFFRACTION 3.7Å

e6ko5H1[H:119-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fab7881 Heavy Chain ; X-RAY DIFFRACTION 3.300Å

e6sv2H2[H:117-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ICSM 18-ANTI-PRP THERAPEUTIC FAB HEAVY CHAIN ; X-RAY DIFFRACTION 2.3Å

e6suzH2[H:117-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ICSM 18-ANTI-PRP THERAPEUTIC FAB HEAVY CHAIN ; X-RAY DIFFRACTION 2.500Å

e6nuyH2[H:119-217] Image Pymol Jmol Links: PDB, SCOP, CATH

Previous Next

e1rzfL2[L:109-210] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FAB E51 LIGHT CHAIN ; ligands: GOL ; X-RAY DIFFRACTION 1.7Å

e2h26A1[A:184-279] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

T-CELL SURFACE GLYCOPROTEIN CD1B ; ligands: GOL ; X-RAY DIFFRACTION 1.8Å

e1uvqA1[A:85-183] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HLA CLASS II HISTOCOMPATIBILITY ANTIGEN ; ligands: GLY,NAG ; X-RAY DIFFRACTION 1.800Å

e1uvqB1[B:95-191] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HLA CLASS II HISTOCOMPATIBILITY ANTIGEN ; X-RAY DIFFRACTION 1.800Å

e1u58A1[A:145-242] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MHC-I HOMOLOG M144 ; X-RAY DIFFRACTION 1.9Å

e2fbjH2[H:119-220] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

IGA-KAPPA J539 FAB (HEAVY CHAIN) ; X-RAY DIFFRACTION 1.95Å

e3fruA1[A:179-269] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NEONATAL FC RECEPTOR ; ligands: NAG,SO4 ; X-RAY DIFFRACTION 2.2Å

e1dn0B2[B:121-225] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

IGM-KAPPA COLD AGGLUTININ (HEAVY CHAIN) ; X-RAY DIFFRACTION 2.28Å

e1fp5A1[A:336-438] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IGE HEAVY CHAIN EPSILON-1 ; X-RAY DIFFRACTION 2.3Å

e1fp5A2[A:439-543] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IGE HEAVY CHAIN EPSILON-1 ; X-RAY DIFFRACTION 2.3Å

e1hdmA1[A:94-196] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (CLASS II HISTOCOMPATIBILITY ANTIGEN, M ALPHA CHAIN) ; X-RAY DIFFRACTION 2.5Å

e1hdmB1[B:88-185] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (CLASS II HISTOCOMPATIBILITY ANTIGEN, M BETA CHAIN) ; X-RAY DIFFRACTION 2.5Å

e3pl6A2[A:83-180] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MHC class II HLA-DQ-alpha chain ; ligands: NAG ; X-RAY DIFFRACTION 2.55Å

e1o0vA1[A:228-330] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Immunoglobulin heavy chain epsilon-1 ; ligands: SO4 ; X-RAY DIFFRACTION 2.6Å

e1hyrC1[C:181-274] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

MHC CLASS I CHAIN-RELATED PROTEIN A ; X-RAY DIFFRACTION 2.7Å

e1hzhH6[H:114-235] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IMMUNOGLOBULIN HEAVY CHAIN ; X-RAY DIFFRACTION 2.70Å

e1hzhH7[H:236-359] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IMMUNOGLOBULIN HEAVY CHAIN ; ligands: BMA,GAL,MAN,NAG ; X-RAY DIFFRACTION 2.70Å

e1hzhH8[H:360-478] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IMMUNOGLOBULIN HEAVY CHAIN ; X-RAY DIFFRACTION 2.70Å

e3rdtC2[C:83-178] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

H-2 class II histocompatibility antigen, A-B alpha chain ; X-RAY DIFFRACTION 2.70Å

e1hxmA2[A:121-206] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

GAMMA-DELTA T-CELL RECEPTOR ; X-RAY DIFFRACTION 3.00Å

e1hxmB2[B:124-230] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

GAMMA-DELTA T-CELL RECEPTOR ; X-RAY DIFFRACTION 3.00Å

e1zvoC2[C:130-234] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Immunoglobulin delta heavy chain ; SOLUTION SCATTERING

e1zvoC5[C:398-512] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Immunoglobulin delta heavy chain ; SOLUTION SCATTERING

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