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
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




Representatives:
e1otgA1[A:2-126]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
5-CARBOXYMETHYL-2-HYDROXYMUCONATE ISOMERASE ; ligands: SO4 ; X-RAY DIFFRACTION
e1otgC1[C:2-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
5-CARBOXYMETHYL-2-HYDROXYMUCONATE ISOMERASE ; ligands: SO4 ; X-RAY DIFFRACTION
e1otgB1[B:2-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
5-CARBOXYMETHYL-2-HYDROXYMUCONATE ISOMERASE ; ligands: SO4 ; X-RAY DIFFRACTION
e3e6qA1[A:-4-121] Image Pymol Jmol Links: PDB, SCOP, CATH
putative 5-carboxymethyl-2-hydroxymuconate isomerase ; ligands: ACT,EDO,FMT,GOL,NA ; X-RAY DIFFRACTION 1.750Å
e4jcuA1[A:-5-128] Image Pymol Jmol Links: PDB, SCOP, CATH
5-CARBOXYMETHYL-2-HYDROXYMUCONATE ISOMERASE ; X-RAY DIFFRACTION 2.4Å
e3e6qB1[B:-4-121] Image Pymol Jmol Links: PDB, SCOP, CATH
putative 5-carboxymethyl-2-hydroxymuconate isomerase ; ligands: EDO,FMT,GOL,NA ; X-RAY DIFFRACTION 1.750Å
e3e6qC1[C:-4-121] Image Pymol Jmol Links: PDB, SCOP, CATH
putative 5-carboxymethyl-2-hydroxymuconate isomerase ; ligands: EDO,GOL,NA ; X-RAY DIFFRACTION 1.750Å
e3e6qD1[D:-5-122] Image Pymol Jmol Links: PDB, SCOP, CATH
putative 5-carboxymethyl-2-hydroxymuconate isomerase ; ligands: ACT,EDO,GOL ; X-RAY DIFFRACTION 1.750Å
e3e6qE1[E:-5-121] Image Pymol Jmol Links: PDB, SCOP, CATH
putative 5-carboxymethyl-2-hydroxymuconate isomerase ; ligands: ACT,EDO,GOL ; X-RAY DIFFRACTION 1.750Å
e3e6qF1[F:-6-121] Image Pymol Jmol Links: PDB, SCOP, CATH
putative 5-carboxymethyl-2-hydroxymuconate isomerase ; ligands: ACT,EDO,FMT,GOL,NA ; X-RAY DIFFRACTION 1.750Å
e3e6qG1[G:-4-121] Image Pymol Jmol Links: PDB, SCOP, CATH
putative 5-carboxymethyl-2-hydroxymuconate isomerase ; ligands: EDO,FMT,GOL,NA ; X-RAY DIFFRACTION 1.750Å
e3e6qH1[H:-4-121] Image Pymol Jmol Links: PDB, SCOP, CATH
putative 5-carboxymethyl-2-hydroxymuconate isomerase ; ligands: EDO,FMT,GOL ; X-RAY DIFFRACTION 1.750Å
e3e6qI1[I:-4-121] Image Pymol Jmol Links: PDB, SCOP, CATH
putative 5-carboxymethyl-2-hydroxymuconate isomerase ; ligands: EDO,FMT,GOL ; X-RAY DIFFRACTION 1.750Å
e3e6qJ1[J:-5-121] Image Pymol Jmol Links: PDB, SCOP, CATH
putative 5-carboxymethyl-2-hydroxymuconate isomerase ; ligands: EDO,GOL,IMD ; X-RAY DIFFRACTION 1.750Å
e3e6qK1[K:-5-121] Image Pymol Jmol Links: PDB, SCOP, CATH
putative 5-carboxymethyl-2-hydroxymuconate isomerase ; ligands: EDO,GOL,IMD ; X-RAY DIFFRACTION 1.750Å
e3e6qL1[L:-5-121] Image Pymol Jmol Links: PDB, SCOP, CATH
putative 5-carboxymethyl-2-hydroxymuconate isomerase ; ligands: EDO,FMT,GOL,IMD ; X-RAY DIFFRACTION 1.750Å
e4jj9A1[A:-11-140] Image Pymol Jmol Links: PDB, SCOP, CATH
5-CARBOXYMETHYL-2-HYDROXYMUCONATE DELTA-ISOMERASE ; ligands: SO4 ; X-RAY DIFFRACTION 1.76Å
e4jj9B2[B:-5-145] Image Pymol Jmol Links: PDB, SCOP, CATH
5-CARBOXYMETHYL-2-HYDROXYMUCONATE DELTA-ISOMERASE ; ligands: SO4 ; X-RAY DIFFRACTION 1.76Å
e4jj9C2[C:-3-141] Image Pymol Jmol Links: PDB, SCOP, CATH
5-CARBOXYMETHYL-2-HYDROXYMUCONATE DELTA-ISOMERASE ; ligands: SO4 ; X-RAY DIFFRACTION 1.76Å
e4nwqB1[B:2-122] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
UNCHARACTERIZED PROTEIN ; ligands: SO4 ; X-RAY DIFFRACTION 2.8Å
e4nwpE1[E:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Uncharacterized protein ; ligands: SO4 ; X-RAY DIFFRACTION 2.100Å
e4nwpF1[F:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Uncharacterized protein ; ligands: SO4 ; X-RAY DIFFRACTION 2.100Å
e4nwpG1[G:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Uncharacterized protein ; ligands: SO4 ; X-RAY DIFFRACTION 2.100Å
e4nwpH1[H:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Uncharacterized protein ; ligands: NH4,SO4 ; X-RAY DIFFRACTION 2.100Å
e4jcuB1[B:-21-108] Image Pymol Jmol Links: PDB, SCOP, CATH
5-CARBOXYMETHYL-2-HYDROXYMUCONATE ISOMERASE ; X-RAY DIFFRACTION 2.4Å
e4jcuC1[C:-7-126] Image Pymol Jmol Links: PDB, SCOP, CATH
5-CARBOXYMETHYL-2-HYDROXYMUCONATE ISOMERASE ; X-RAY DIFFRACTION 2.4Å
e6c9iE1[E:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9iF1[F:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9iG1[G:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9iH1[H:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9iM1[M:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9iN1[N:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9iO1[O:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9iP1[P:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9iU1[U:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9iV1[V:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9iW1[W:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9iX1[X:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9kE1[E:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9kF1[F:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9kG1[G:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9kH1[H:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9kM1[M:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9kN1[N:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9kO1[O:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9kP1[P:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9kU1[U:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9kV1[V:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9kW1[W:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6c9kX1[X:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6nhtE1[E:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6nhtF1[F:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6nhtG1[G:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6nhtH1[H:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6nhtM1[M:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6nhtN1[N:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6nhtO1[O:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6nhtP1[P:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6nhtU1[U:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6nhtV1[V:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6nhtW1[W:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6nhtX1[X:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6nhvN1[N:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6nhvO1[O:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
e6nhvX1[X:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DARP14 - Subunit B ; ELECTRON MICROSCOPY
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