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
Representatives:
e1ju3A1[A:352-574] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
cocaine esterase ; ligands: PBC ; X-RAY DIFFRACTION 1.58Å
e1l7rA1[A:352-574] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
cocaine esterase ; X-RAY DIFFRACTION 1.64Å
e1l7qA1[A:352-574] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
cocaine esterase ; ligands: BEZ ; X-RAY DIFFRACTION 1.76Å
e1ju4A1[A:352-574] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
cocaine esterase ; ligands: BEZ ; X-RAY DIFFRACTION 1.63Å
e2b4kC1[C:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; ligands: GOL ; X-RAY DIFFRACTION 3.0Å
e1nx9B1[B:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.2Å
e2b9vM1[M:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e1mpxC1[C:405-637] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
alpha-amino acid ester hydrolase ; ligands: GOL ; X-RAY DIFFRACTION 1.90Å
e2b9vN1[N:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e2b9vF1[F:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e2b9vJ1[J:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e2b4kB1[B:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; ligands: GOL ; X-RAY DIFFRACTION 3.0Å
e2b9vP1[P:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e1ryyA1[A:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.8Å
e2b9vL1[L:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e2b9vO1[O:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e1mpxD1[D:405-637] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
alpha-amino acid ester hydrolase ; ligands: GOL ; X-RAY DIFFRACTION 1.90Å
e1nx9D1[D:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.2Å
e2b9vH1[H:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e2b9vD1[D:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e2b9vI1[I:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e2b4kD1[D:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 3.0Å
e2b9vB1[B:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e1ryyC1[C:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.8Å
e1ryyF1[F:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.8Å
e2b4kA1[A:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; ligands: GOL ; X-RAY DIFFRACTION 3.0Å
e1ryyE1[E:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.8Å
e1ryyH1[H:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.8Å
e1ryyB1[B:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.8Å
e1ryyG1[G:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.8Å
e2b9vG1[G:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e1ryyD1[D:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.8Å
e1nx9A1[A:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.2Å
e2b9vE1[E:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e1mpxB1[B:405-637] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
alpha-amino acid ester hydrolase ; ligands: GOL ; X-RAY DIFFRACTION 1.90Å
e2b9vA1[A:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e2b9vC1[C:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e2b9vK1[K:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.0Å
e1nx9C1[C:435-666] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
alpha-amino acid ester hydrolase ; X-RAY DIFFRACTION 2.2Å
e3i2fA1[A:352-574] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cocaine esterase ; ligands: CL,DBC,GOL,SO4 ; X-RAY DIFFRACTION 2.500Å
e3puhA1[A:352-574] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cocaine esterase ; ligands: GOL ; X-RAY DIFFRACTION 2.300Å
e3idaA1[A:352-575] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cocaine esterase ; ligands: CL,DBC,GOL ; X-RAY DIFFRACTION 1.60Å
e3i2gA1[A:352-575] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cocaine esterase ; ligands: CL,DBC,GOL,SO4 ; X-RAY DIFFRACTION 2.500Å
e3i2hA1[A:352-575] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cocaine esterase ; ligands: CL,DBC,GOL,SO4 ; X-RAY DIFFRACTION 1.65Å
e3i2iA1[A:352-574] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cocaine esterase ; ligands: CL,DBC,GOL,SO4 ; X-RAY DIFFRACTION 2.100Å
e3i2jA1[A:352-575] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cocaine esterase ; ligands: CL,GOL,SO4 ; X-RAY DIFFRACTION 2.000Å
e3i2kA1[A:352-575] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cocaine esterase ; ligands: CL,DBC,GOL,SO4 ; X-RAY DIFFRACTION 1.510Å
e3puhB1[B:352-574] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cocaine esterase ; ligands: GOL ; X-RAY DIFFRACTION 2.300Å
e3puiA1[A:352-576] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cocaine esterase ; ligands: CL ; X-RAY DIFFRACTION 1.53Å
e3ib3A3[A:353-559] Image Pymol Jmol Links: PDB, SCOP, CATH
CocE/NonD family hydrolase ; ligands: CL ; X-RAY DIFFRACTION 2.05Å
e3iiiA3[A:353-560] Image Pymol Jmol Links: PDB, SCOP, CATH
CocE/NonD family hydrolase ; ligands: CL,PLM ; X-RAY DIFFRACTION 1.95Å
e3ib3B3[B:353-559] Image Pymol Jmol Links: PDB, SCOP, CATH
CocE/NonD family hydrolase ; ligands: CL,NI ; X-RAY DIFFRACTION 2.05Å
e4pf1A1[A:389-623] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidase S15/CocE/NonD ; ligands: GOL ; X-RAY DIFFRACTION 2.10Å
e4pf1B1[B:389-623] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidase S15/CocE/NonD ; ligands: GOL ; X-RAY DIFFRACTION 2.10Å
e4pf1C1[C:389-623] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidase S15/CocE/NonD ; ligands: GOL ; X-RAY DIFFRACTION 2.10Å
e4pf1D1[D:389-623] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidase S15/CocE/NonD ; ligands: GOL ; X-RAY DIFFRACTION 2.10Å
e4p08A1[A:352-574] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cocaine esterase ; X-RAY DIFFRACTION 2.340Å
e7f65A1[A:352-574] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cocaine esterase ; ligands: BEZ,SO4 ; X-RAY DIFFRACTION 2.200Å
e8jj7A1[A:358-555] Image Pymol Jmol Links: PDB, SCOP, CATH
Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
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