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:
e1cm3A1[A:1-85] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HISTIDINE-CONTAINING PROTEIN ; X-RAY DIFFRACTION 1.6Å
e1pchA1[A:2-89] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN ; ligands: SO4 ; X-RAY DIFFRACTION 1.80Å
e1ptfA1[A:1-87] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION
e1mo1D1[D:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH
Hpr-like protein crh ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 1.80Å
e1qr5A1[A:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,
PHOSPHOCARRIER PROTEIN HPR ; SOLUTION NMR
e1qfrA1[A:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; SOLUTION NMR
e1fu0A1[A:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 1.90Å
e1ka5A1[A:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; SOLUTION NMR
e2ak7B1[B:1-86] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HPR-LIKE PROTEIN CRH ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å
e1kkmH1[H:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; ligands: CA,PO4 ; X-RAY DIFFRACTION 2.80Å
e1sphB1[B:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION
e2oenL1[L:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 3.17Å
e2nzuL1[L:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; ligands: SO4 ; X-RAY DIFFRACTION 2.5Å
e1mo1C1[C:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH
Hpr-like protein crh ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 1.80Å
e1mu4A1[A:1-86] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HPr-like protein crh ; ligands: SO4 ; X-RAY DIFFRACTION 1.8Å
e1rzrY1[Y:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 2.8Å
e1fu0B1[B:101-187] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 1.90Å
e1mu4B1[B:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HPr-like protein crh ; ligands: SO4 ; X-RAY DIFFRACTION 1.8Å
e2hprA1[A:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å
e1kklH1[H:3-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 2.80Å
e1rzrT1[T:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 2.8Å
e2hidA1[A:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,
HISTIDINE CONTAINING PROTEIN ; SOLUTION NMR
e1rzrL1[L:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 2.8Å
e1kklJ1[J:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 2.80Å
e1sphA1[A:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION
e1rzrS1[S:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 2.8Å
e1jemA1[A:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,
HISTIDINE CONTAINING PROTEIN ; SOLUTION NMR
e1mo1A1[A:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH
Hpr-like protein crh ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 1.80Å
e1kkmJ1[J:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; ligands: CA,PO4 ; X-RAY DIFFRACTION 2.80Å
e2nzvL1[L:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; ligands: SO4 ; X-RAY DIFFRACTION 3.0Å
e1kkmI1[I:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; ligands: CA,PO4 ; X-RAY DIFFRACTION 2.80Å
e1kklI1[I:2-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 2.80Å
e2ak7A1[A:1-86] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HPR-LIKE PROTEIN CRH ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å
e1mo1B1[B:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH
Hpr-like protein crh ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 1.80Å
e1ggrB1[B:301-385] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; SOLUTION NMR
e1j6tB1[B:301-385] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; SOLUTION NMR
e1vrcC1[C:201-285] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; SOLUTION NMR
e1opdA1[A:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HISTIDINE-CONTAINING PROTEIN ; ligands: SO4 ; X-RAY DIFFRACTION
e1vrcD1[D:201-285] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; SOLUTION NMR
e3ezeB1[B:301-385] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (PHOSPHOTRANSFERASE SYSTEM, HPR) ; ligands: PO3 ; SOLUTION NMR
e1cm2A1[A:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HISTIDINE-CONTAINING PROTEIN ; X-RAY DIFFRACTION 1.8Å
e1pfhA1[A:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHO-HPR ; SOLUTION NMR
e2jelP1[P:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HISTIDINE-CONTAINING PROTEIN ; ligands: SO4 ; X-RAY DIFFRACTION 2.5Å
e2rlzB1[B:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HPr-like protein crh ; SOLID-STATE NMR
e1zvvP1[P:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HPr-like protein crh ; ligands: IOD ; X-RAY DIFFRACTION 2.98Å
e1hdnA1[A:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR ; SOLUTION NMR
e2rlzA1[A:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HPr-like protein crh ; SOLID-STATE NMR
e1zvvJ1[J:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HPr-like protein crh ; X-RAY DIFFRACTION 2.98Å
e3ezaB1[B:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR ; SOLUTION NMR
e1zvvW1[W:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HPr-like protein crh ; X-RAY DIFFRACTION 2.98Å
e1pohA1[A:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,
HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN HPR ; ligands: SO4 ; X-RAY DIFFRACTION
e3ezbB1[B:301-385] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (PHOSPHOCARRIER PROTEIN HPR) ; SOLUTION NMR
e1k1cA1[A:2-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
catabolite repression HPr-like protein ; SOLUTION NMR
e3oqmS1[S:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 2.96Å
e3oqoS1[S:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; ligands: SO4 ; X-RAY DIFFRACTION 2.97Å
e3le5A1[A:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH
PHOSPHOTRANSFERASE SYSTEM, HPR-RELATED PROTEINS ; X-RAY DIFFRACTION 2.0Å
e2xdfC1[C:601-685] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; SOLUTION SCATTERING
e3ihsA1[A:-2-82] Image Pymol Jmol Links: PDB, SCOP, CATH
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 1.15Å
e2lrkD1[D:301-385] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; SOLUTION NMR
e1txeA1[A:1-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; SOLUTION NMR
e2fepS1[S:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; ligands: SO4 ; X-RAY DIFFRACTION 2.45Å
e1y4yA1[A:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å
e1y4yB1[B:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å
e1y4yC1[C:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å
e1y50A1[A:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å
e1y51A1[A:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; ligands: SO4 ; X-RAY DIFFRACTION 1.64Å
e1y51B1[B:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; ligands: SO4 ; X-RAY DIFFRACTION 1.64Å
e1y51C1[C:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; ligands: SO4 ; X-RAY DIFFRACTION 1.64Å
e3ccdA1[A:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; ligands: SO4 ; X-RAY DIFFRACTION 1.00Å
e3ccdB1[B:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; ligands: SO4 ; X-RAY DIFFRACTION 1.00Å
e2xdfD1[D:601-685] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; SOLUTION SCATTERING
e3ihsB1[B:-1-82] Image Pymol Jmol Links: PDB, SCOP, CATH
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 1.15Å
e3le1A1[A:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphotransferase system, HPr-related proteins ; ligands: CD ; X-RAY DIFFRACTION 1.51Å
e3le1B1[B:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphotransferase system, HPr-related proteins ; ligands: CD ; X-RAY DIFFRACTION 1.51Å
e3le3A1[A:1-88] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphotransferase system, HPr-related proteins ; X-RAY DIFFRACTION 1.86Å
e3le3B1[B:1-88] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphotransferase system, HPr-related proteins ; X-RAY DIFFRACTION 1.86Å
e3le3C1[C:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphotransferase system, HPr-related proteins ; X-RAY DIFFRACTION 1.86Å
e3le5B1[B:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH
PHOSPHOTRANSFERASE SYSTEM, HPR-RELATED PROTEINS ; X-RAY DIFFRACTION 2.0Å
e3lfgA1[A:1-88] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphotransferase system, HPr-related proteins ; X-RAY DIFFRACTION 1.58Å
e3lfgB1[B:1-89] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphotransferase system, HPr-related proteins ; X-RAY DIFFRACTION 1.58Å
e3lfgC1[C:1-88] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphotransferase system, HPr-related proteins ; X-RAY DIFFRACTION 1.58Å
e3lnwA1[A:1-86] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphotransferase system, HPr-related proteins ; X-RAY DIFFRACTION 2.30Å
e3lnwB1[B:1-86] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphotransferase system, HPr-related proteins ; X-RAY DIFFRACTION 2.30Å
e3lnwC1[C:1-86] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphotransferase system, HPr-related proteins ; X-RAY DIFFRACTION 2.30Å
e3oqmD1[D:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 2.96Å
e3oqnS1[S:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 3.3Å
e3oqnD1[D:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; X-RAY DIFFRACTION 3.3Å
e3oqoD1[D:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; ligands: SO4 ; X-RAY DIFFRACTION 2.97Å
e2lrlD1[D:301-385] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOCARRIER PROTEIN HPR ; ligands: PO3 ; SOLUTION NMR
e4xwjB1[B:1-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; X-RAY DIFFRACTION 2.0Å
e5t17A1[A:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein NPr ; SOLUTION NMR
e5t1nA1[A:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein NPr ; SOLUTION NMR
e5t1oA1[A:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein NPr ; SOLUTION SCATTERING
e5ya0C1[C:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; ligands: HEZ,PO4 ; X-RAY DIFFRACTION 2.7Å
e5ya0D1[D:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; ligands: HEZ,PO4 ; X-RAY DIFFRACTION 2.7Å
e5ya1C1[C:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; ligands: HEZ,PO4 ; X-RAY DIFFRACTION 2.7Å
e5ya1D1[D:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; ligands: HEZ,PO4 ; X-RAY DIFFRACTION 2.7Å
e5ya2C1[C:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; ligands: HEZ,PO4 ; X-RAY DIFFRACTION 2.701Å
e5ya2D1[D:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; ligands: HEZ,PO4 ; X-RAY DIFFRACTION 2.701Å
e6kcrB1[B:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; X-RAY DIFFRACTION 3.5Å
e6kcrD1[D:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphocarrier protein HPr ; X-RAY DIFFRACTION 3.5Å
e7ff5A1[A:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphocarrier, HPr family ; ligands: SO4 ; X-RAY DIFFRACTION 2.37Å
e7ff5B1[B:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphocarrier, HPr family ; ligands: SO4 ; X-RAY DIFFRACTION 2.37Å
e7ff5C1[C:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphocarrier, HPr family ; ligands: SO4 ; X-RAY DIFFRACTION 2.37Å
e7x7hB1[B:0-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HPr family phosphocarrier protein ; X-RAY DIFFRACTION 2.00Å
e7x7hD1[D:0-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HPr family phosphocarrier protein ; X-RAY DIFFRACTION 2.00Å
looks like an elaborated ferredoxin
contains a HTH motif
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