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X - Possible homology level

H - Homology level

T - Topology level

F - Family level

* - Provisional representative


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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

X: cradle loop barrel

Refs: Structure 14, 1489-1498; Current opinion in structural biology 18, 358-365

X: Outer membrane meander beta-barrels
H: Porins
T: Porin
F: Omp85

PF01103 CL0193

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

e4k3bA6[A:422-792] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Outer membrane protein assembly factor BamA ; X-RAY DIFFRACTION 3.2Å

F: Unmapped domains

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