Evolutionary classification of protein domain structures
alpha arraysalpha-helix arrays with mainly perpendicular helices
alpha bundlesalpha-helix bundles with mainly parallel helices
Representatives:
e3p5nA1[A:10-188] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Riboflavin uptake protein ; ligands: RBF ; X-RAY DIFFRACTION 3.600Å
e8bmqC1[C:10-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e3p5nB1[B:10-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Riboflavin uptake protein ; ligands: RBF ; X-RAY DIFFRACTION 3.600Å
e4huqS1[S:10-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Uncharacterized protein ; X-RAY DIFFRACTION 3.00Å
e4rfsS1[S:3-200] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Substrate binding pritein S ; X-RAY DIFFRACTION 3.25Å
e4z7fA1[A:7-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Folate ECF transporter ; ligands: FOL ; X-RAY DIFFRACTION 3.1940Å
e4z7fB1[B:6-176] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Folate ECF transporter ; ligands: FOL ; X-RAY DIFFRACTION 3.1940Å
e4z7fC1[C:7-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Folate ECF transporter ; ligands: FOL ; X-RAY DIFFRACTION 3.1940Å
e4z7fD1[D:6-176] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Folate ECF transporter ; ligands: FOL ; X-RAY DIFFRACTION 3.1940Å
e4z7fE1[E:10-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Folate ECF transporter ; ligands: FOL ; X-RAY DIFFRACTION 3.1940Å
e4z7fF1[F:7-171] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Folate ECF transporter ; ligands: FOL ; X-RAY DIFFRACTION 3.1940Å
e5d0yA1[A:13-167] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Conserved hypothetical membrane protein ; ligands: FOL ; X-RAY DIFFRACTION 3Å
e5d0yB1[B:13-167] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Conserved hypothetical membrane protein ; ligands: FOL ; X-RAY DIFFRACTION 3Å
e5d3mC1[C:8-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
S-component for folate ; X-RAY DIFFRACTION 3.3Å
e5d3mG1[G:8-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
S-component for folate ; X-RAY DIFFRACTION 3.3Å
e5d7tC1[C:9-173] Image Pymol Jmol Links: PDB, SCOP, CATH
e5d7tG1[G:9-173] Image Pymol Jmol Links: PDB, SCOP, CATH
e5jszC1[C:9-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Conserved hypothetical membrane protein ; X-RAY DIFFRACTION 3Å
e5jszG1[G:9-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Conserved hypothetical membrane protein ; X-RAY DIFFRACTION 3Å
e5kbwA1[A:2-171] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Riboflavin transporter RibU ; ligands: RBF ; X-RAY DIFFRACTION 2.60Å
e5kbwB1[B:2-172] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Riboflavin transporter RibU ; ligands: RBF ; X-RAY DIFFRACTION 2.60Å
e5kc0A1[A:2-167] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Riboflavin transporter RibU ; ligands: BNG,RBF ; X-RAY DIFFRACTION 3.2Å
e5kc4A1[A:2-167] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Riboflavin transporter RibU ; ligands: BNG,RBF ; X-RAY DIFFRACTION 3.40Å
e5kc4E1[E:2-167] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Riboflavin transporter RibU ; ligands: BNG,RBF ; X-RAY DIFFRACTION 3.40Å
e6zg3C1[C:1-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Conserved hypothetical membrane protein ; ligands: CIT,LMT,PEG ; X-RAY DIFFRACTION 2.8Å
e6zg3H1[H:1-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Conserved hypothetical membrane protein ; ligands: CIT,LMT ; X-RAY DIFFRACTION 2.8Å
e7nntC1[C:10-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Folate family ECF transporter S component ; ELECTRON MICROSCOPY
e7nnuC1[C:10-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Conserved hypothetical membrane protein ; ELECTRON MICROSCOPY
e8bmpC1[C:10-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ligands: ATP ; ELECTRON MICROSCOPY
e6fnpA1[A:7-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Membrane protein ; X-RAY DIFFRACTION 3.4Å
e6fnpE1[E:8-157] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Membrane protein ; X-RAY DIFFRACTION 3.4Å
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
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