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:
e6eorD1[D:20-599] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: 9XH ; X-RAY DIFFRACTION 2.9Å
e6qzvB2[B:20-599] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Dipeptidyl peptidase 9 ; X-RAY DIFFRACTION 3.00Å
e6qzvC1[C:20-599] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Dipeptidyl peptidase 9 ; X-RAY DIFFRACTION 3.00Å
e6qzvD2[D:20-599] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Dipeptidyl peptidase 9 ; X-RAY DIFFRACTION 3.00Å
e6qzvA2[A:21-599] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Dipeptidyl peptidase 9 ; X-RAY DIFFRACTION 3.00Å
e6x6aA1[A:18-601] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ELECTRON MICROSCOPY
e7crwD1[D:21-600] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ELECTRON MICROSCOPY
e6x6aD1[D:18-601] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ELECTRON MICROSCOPY
e6x6cA1[A:18-602] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: GK2 ; ELECTRON MICROSCOPY
e6x6cD1[D:18-601] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: GK2 ; ELECTRON MICROSCOPY
e7crwC2[C:21-115,C:136-600] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ELECTRON MICROSCOPY
e7jn7A1[A:18-601] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: GK2 ; ELECTRON MICROSCOPY
e7jkqA2[A:18-116,A:136-601] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ELECTRON MICROSCOPY
e7jkqD1[D:18-114,D:139-601] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ELECTRON MICROSCOPY
e7oz7B1[B:48-139,B:164-627] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 2.600Å
e7oz7A1[A:48-140,A:166-626] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 2.600Å
e7zxsB2[B:20-601] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: EDO,KBO,PEG ; X-RAY DIFFRACTION 1.807Å
e7svlD1[D:18-599] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: D06 ; X-RAY DIFFRACTION 2.460Å
e7svlA1[A:19-599] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: D06 ; X-RAY DIFFRACTION 2.460Å
e7svlB2[B:20-599] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: D06 ; X-RAY DIFFRACTION 2.460Å
e7svlC2[C:20-600] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: D06 ; X-RAY DIFFRACTION 2.460Å
e7svnA2[A:19-599] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: CW8 ; X-RAY DIFFRACTION 2.780Å
e7svnB2[B:20-599] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: CW8 ; X-RAY DIFFRACTION 2.780Å
e7svnC1[C:20-600] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: CW8 ; X-RAY DIFFRACTION 2.780Å
e7svnD2[D:19-599] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: CW8 ; X-RAY DIFFRACTION 2.780Å
e7zxsA1[A:22-601] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: EDO,KBO,PEG ; X-RAY DIFFRACTION 1.807Å
e7zxsC1[C:21-601] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: EDO,KBO,PEG ; X-RAY DIFFRACTION 1.807Å
e7zxsD2[D:22-601] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: EDO,KBO,PEG ; X-RAY DIFFRACTION 1.807Å
e6eosA1[A:48-138,A:165-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 3.1Å
e6eosB1[B:48-138,B:165-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 3.1Å
e6eotB1[B:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 3.5Å
e6eotI1[I:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 3.5Å
e6eooA1[A:48-138,A:165-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 2.5Å
e6eooB1[B:48-138,B:165-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 2.5Å
e6eooC1[C:48-138,C:165-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 2.5Å
e6eopB1[B:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: CA ; X-RAY DIFFRACTION 2.4Å
e6eopC1[C:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: CA ; X-RAY DIFFRACTION 2.4Å
e6eoqB1[B:20-109,B:139-579] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; X-RAY DIFFRACTION 3.0Å
e6eoqC2[C:20-109,C:139-579] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; X-RAY DIFFRACTION 3.0Å
e6eosD1[D:48-138,D:165-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 3.1Å
e6eosE2[E:48-143,E:165-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 3.1Å
e6eosF1[F:48-138,F:165-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 3.1Å
e6eotA2[A:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 3.5Å
e6eotD1[D:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 3.5Å
e6eotG1[G:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 3.5Å
e6eotK2[K:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 3.5Å
e6hp8A2[A:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH
Dipeptidyl peptidase 8 ; ligands: GK2,GOL,NA ; X-RAY DIFFRACTION 2.50Å
e6hp8B1[B:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH
Dipeptidyl peptidase 8 ; ligands: GK2,GOL,NA ; X-RAY DIFFRACTION 2.50Å
e6hp8C1[C:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH
Dipeptidyl peptidase 8 ; ligands: GK2,GOL,NA ; X-RAY DIFFRACTION 2.50Å
e6eoqD1[D:20-109,D:139-579] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; X-RAY DIFFRACTION 3.0Å
e6eosC2[C:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 3.1Å
e6qzwC2[C:48-629] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Dipeptidyl peptidase 8 ; ligands: NA ; X-RAY DIFFRACTION 3.20Å
e6qzwA1[A:48-629] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 3.20Å
e6qzwB1[B:48-629] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 3.20Å
e6trwA2[A:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: NA ; X-RAY DIFFRACTION 3.000Å
e6trwB2[B:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: NA ; X-RAY DIFFRACTION 3.000Å
e6trwC2[C:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: NA ; X-RAY DIFFRACTION 3.000Å
e6trxB1[B:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: 9XH,NA,PO4,TMO ; X-RAY DIFFRACTION 3.200Å
e6trxA1[A:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: 9XH,NA,PO4,TMO ; X-RAY DIFFRACTION 3.200Å
e6trxC1[C:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: 9XH,NA,PO4,TMO ; X-RAY DIFFRACTION 3.200Å
e7jn7D1[D:18-109,D:139-579] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: GK2 ; ELECTRON MICROSCOPY
e7a3fC1[C:17-109,C:139-579] Image Pymol Jmol Links: PDB, SCOP, CATH
Dipeptidyl peptidase 9 ; X-RAY DIFFRACTION 2.900Å
e7a3lA2[A:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: CL,GOL,QXN ; X-RAY DIFFRACTION 2.800Å
e7a3fB1[B:20-109,B:139-579] Image Pymol Jmol Links: PDB, SCOP, CATH
Dipeptidyl peptidase 9 ; ligands: GOL ; X-RAY DIFFRACTION 2.900Å
e7a3fA1[A:20-108,A:139-579] Image Pymol Jmol Links: PDB, SCOP, CATH
Dipeptidyl peptidase 9 ; ligands: GOL ; X-RAY DIFFRACTION 2.900Å
e7a3fD1[D:20-109,D:139-579] Image Pymol Jmol Links: PDB, SCOP, CATH
Dipeptidyl peptidase 9 ; X-RAY DIFFRACTION 2.900Å
e7a3gB1[B:46-138,B:165-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: CL,GOL,PO4,QXQ,TMO ; X-RAY DIFFRACTION 2.800Å
e7a3gA1[A:46-138,A:165-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: CL,GOL,PO4,QXQ,TMO ; X-RAY DIFFRACTION 2.800Å
e7a3iA2[A:48-140,A:164-629] Image Pymol Jmol Links: PDB, SCOP, CATH
Dipeptidyl peptidase 8 ; ligands: CL,NA ; X-RAY DIFFRACTION 2.800Å
e7a3iB1[B:48-139,B:164-629] Image Pymol Jmol Links: PDB, SCOP, CATH
Dipeptidyl peptidase 8 ; ligands: CL,NA,QXH ; X-RAY DIFFRACTION 2.800Å
e7a3iC1[C:48-140,C:164-629] Image Pymol Jmol Links: PDB, SCOP, CATH
Dipeptidyl peptidase 8 ; ligands: CL,NA,QXH ; X-RAY DIFFRACTION 2.800Å
e7a3jC2[C:48-140,C:164-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: CL ; X-RAY DIFFRACTION 3.000Å
e7a3jA2[A:48-140,A:164-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 3.000Å
e7a3jB2[B:48-137,B:164-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: CL ; X-RAY DIFFRACTION 3.000Å
e7a3kC2[C:48-140,C:165-629] Image Pymol Jmol Links: PDB, SCOP, CATH
Dipeptidyl peptidase 8 ; ligands: CL,NA ; X-RAY DIFFRACTION 2.650Å
e7a3kA1[A:48-140,A:165-629] Image Pymol Jmol Links: PDB, SCOP, CATH
Dipeptidyl peptidase 8 ; ligands: CL,NA ; X-RAY DIFFRACTION 2.650Å
e7a3kB2[B:48-138,B:165-629] Image Pymol Jmol Links: PDB, SCOP, CATH
Dipeptidyl peptidase 8 ; ligands: CL,NA ; X-RAY DIFFRACTION 2.650Å
e7a3lB1[B:48-139,B:164-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: CL,GOL,QXN,TMO ; X-RAY DIFFRACTION 2.800Å
e7a3lC1[C:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: CL,GOL,QXN ; X-RAY DIFFRACTION 2.800Å
e7ayqA1[A:48-140,A:166-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: GOL,PO4,S9Z ; X-RAY DIFFRACTION 2.450Å
e7ayqB2[B:48-139,B:164-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: GOL,PO4 ; X-RAY DIFFRACTION 2.450Å
e7ayrA1[A:48-140,A:166-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: PO4 ; X-RAY DIFFRACTION 2.690Å
e7ayrB2[B:48-139,B:164-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: PO4 ; X-RAY DIFFRACTION 2.690Å
e7or4B1[B:48-139,B:164-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: 2YI ; X-RAY DIFFRACTION 2.440Å
e7or4A1[A:48-139,A:164-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; X-RAY DIFFRACTION 2.440Å
e7svmA1[A:47-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: D06,TMO ; X-RAY DIFFRACTION 2.690Å
e7svmB2[B:47-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: D06,TMO ; X-RAY DIFFRACTION 2.690Å
e7svmC1[C:47-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: D06,TMO ; X-RAY DIFFRACTION 2.690Å
e7svoA1[A:47-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: CW8,TMO ; X-RAY DIFFRACTION 2.580Å
e7svoB1[B:47-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: CW8,TMO ; X-RAY DIFFRACTION 2.580Å
e7svoC2[C:47-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: CW8,TMO ; X-RAY DIFFRACTION 2.580Å
e6eopA1[A:48-629] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 8 ; ligands: CA,FLC ; X-RAY DIFFRACTION 2.4Å
e6eorA1[A:21-599] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: 9XH ; X-RAY DIFFRACTION 2.9Å
e6eorB2[B:20-599] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: 9XH ; X-RAY DIFFRACTION 2.9Å
e6eorC2[C:20-579] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; ligands: 9XH ; X-RAY DIFFRACTION 2.9Å
e6eoqA1[A:20-109,A:139-579] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Dipeptidyl peptidase 9 ; X-RAY DIFFRACTION 3.0Å
Pseudo 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