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
Refs: Structure 14, 1489-1498; Current opinion in structural biology 18, 358-365
Representatives:
e4c00A4[A:264-577] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
TRANSLOCATION AND ASSEMBLY MODULE TAMA ; ligands: ACT,CL,MC3 ; X-RAY DIFFRACTION 2.25Å
e4k3cA3[A:419-793] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 2.9Å
e7ye6A6[A:422-808] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e4n75A1[A:426-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 2.604Å
e4n75B1[B:426-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 2.604Å
e4c4vA1[A:422-808] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
OUTER MEMBRANE PROTEIN ASSEMBLY FACTOR BAMA ; X-RAY DIFFRACTION 3.0Å
e4c4vB1[B:422-678,B:698-808] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
OUTER MEMBRANE PROTEIN ASSEMBLY FACTOR BAMA ; X-RAY DIFFRACTION 3.0Å
e4n74A1[A:264-577] Image Pymol Jmol Links: PDB, SCOP, CATH
Predicted outer membrane protein and surface antigen ; X-RAY DIFFRACTION 2.9Å
e5aywA1[A:422-808] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 3.55Å
e5d0oA5[A:422-809] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 2.9Å
e5d0qA6[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 3.5Å
e5d0qF6[F:422-807] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 3.5Å
e5ljoA3[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e5or1A1[A:423-802] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 2.92Å
e6fsuA1[A:412-677,A:698-819] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 2.60Å
e6fsuB1[B:412-677,B:699-819] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 2.60Å
e6qgxA1[A:426-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ligands: C8E ; X-RAY DIFFRACTION 2.2Å
e6qgwA1[A:426-807] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ligands: C8E ; X-RAY DIFFRACTION 1.938Å
e6qgyA1[A:426-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ligands: C8E ; X-RAY DIFFRACTION 2.509Å
e6qgyC1[C:426-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ligands: C8E ; X-RAY DIFFRACTION 2.509Å
e6t1wB2[B:423-807] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 3.79Å
e6v05A1[A:422-676,A:700-808] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6t1wA6[A:422-809] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 3.79Å
e6v05F1[F:459-675,F:702-808] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA,Outer membrane protein assembly factor BamA,Outer membrane protein assembly factor BamA,Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6wulB1[B:136-512] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Bac_surface_Ag domain-containing protein ; ELECTRON MICROSCOPY
e6sn9A6[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6wuhB1[B:132-512] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Bac_surface_Ag domain-containing protein ; ELECTRON MICROSCOPY
e6wujB1[B:156-512] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Bac_surface_Ag domain-containing protein ; ELECTRON MICROSCOPY
e6wulE1[E:136-512] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Bac_surface_Ag domain-containing protein ; ELECTRON MICROSCOPY
e6wuma1[a:136-512] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Bac_surface_Ag domain-containing protein ; ELECTRON MICROSCOPY
e6wumB1[B:136-512] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Bac_surface_Ag domain-containing protein ; ELECTRON MICROSCOPY
e6wutB1[B:136-512] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Bac_surface_Ag domain-containing protein ; ELECTRON MICROSCOPY
e6lyqA2[A:422-809] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 3.19Å
e6lyrA3[A:422-809] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 3.28Å
e6lysA5[A:422-809] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 3.05Å
e6sobA1[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6sojA5[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6lyuA1[A:421-806] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7nriA5[A:422-808] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6smxA2[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7nreA1[A:423-677,A:698-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ligands: C8E,MG ; X-RAY DIFFRACTION 2.3Å
e6sn0A2[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6sn2A4[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6sn3A3[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6sn4A4[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6sn5A5[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6sn7A1[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6sn8A2[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6so7A6[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6so8A2[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6soaA6[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6socA1[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6sogA1[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e6sohA1[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7nrfA1[A:424-677,A:698-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ligands: C8E,MG ; X-RAY DIFFRACTION 2.2Å
e7nd0A1[A:422-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7bnqA5[A:422-675,A:702-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7nbxA4[A:422-675,A:702-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7ncsA6[A:422-675,A:702-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7e4hA1[A:119-484] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Sorting assembly machinery 50 kDa subunit ; ELECTRON MICROSCOPY
e7e4iA1[A:119-484] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Sorting assembly machinery 50 kDa subunit ; ELECTRON MICROSCOPY
e7ri4A1[A:422-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7ri5A1[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7ri6A1[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7ri7A1[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7ri8A1[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7ri9A1[A:422-806] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7rj5A1[A:422-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7btwA1[A:122-484] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Mitochondrial outer membrane beta-barrel protein ; ELECTRON MICROSCOPY
e7btwD1[D:122-484] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Mitochondrial outer membrane beta-barrel protein ; ELECTRON MICROSCOPY
e7btxA1[A:122-484] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Mitochondrial outer membrane beta-barrel protein ; ELECTRON MICROSCOPY
e7btyA1[A:122-484] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Mitochondrial outer membrane beta-barrel protein ; ELECTRON MICROSCOPY
e7tt4A1[A:421-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7tt5A3[A:422-809] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7tt6A2[A:422-809] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7tt7A2[A:422-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7ojfN1[N:422-809] Image Pymol Jmol Links: PDB, SCOP, CATH
Outer membrane protein assembly factor BamA ; ligands: LPP ; ELECTRON MICROSCOPY
e7p1cA1[A:424-677,A:698-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ligands: C8E ; X-RAY DIFFRACTION 2.5Å
e7tszA1[A:421-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7tt0A1[A:421-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7tt1A1[A:421-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7tt2A1[A:421-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7tt3A1[A:421-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7ttcA1[A:421-807] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ligands: K33 ; ELECTRON MICROSCOPY
e7r1wA3[A:422-809] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7r1vA1[A:423-677,A:698-809] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 2.50Å
e8adgA3[A:422-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e8adiA5[A:422-809] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7vkuA1[A:118-484] Image Pymol Jmol Links: PDB, SCOP, CATH
Sorting assembly machinery 50 kDa subunit ; ELECTRON MICROSCOPY
e8bnzA1[A:422-808] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e8bo2A3[A:422-810] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e8bvqA2[A:422-808] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e8bwcA1[A:421-806] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Outer membrane protein assembly factor BamA ; ELECTRON MICROSCOPY
e7ye4A3[A:422-808] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
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