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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: OMPA-like
T: OMPA-like
F: FHBP_C

PF08794 CL0193

Representatives:

e3kvdD2[D:203-320] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LIPOPROTEIN ; X-RAY DIFFRACTION 2.0Å

e1ys5A1[A:39-156] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

lipoprotein ; SOLUTION NMR

e8bk2A1[A:142-260] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: EDO ; X-RAY DIFFRACTION 2.41Å

e8bk2B2[B:142-259] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: EDO,IMD,MPD ; X-RAY DIFFRACTION 2.41Å

e8bk2C2[C:142-260] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: SO4 ; X-RAY DIFFRACTION 2.41Å

e4aynA1[A:203-320] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FACTOR H-BINDING PROTEIN ; ligands: SO4 ; X-RAY DIFFRACTION 2.06Å

e4aynB1[B:203-320] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FACTOR H-BINDING PROTEIN ; ligands: SO4 ; X-RAY DIFFRACTION 2.06Å

e5t5fA2[A:138-255] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein variant B24 ; X-RAY DIFFRACTION 2.98Å

e5o14A1[A:138-255] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein variant 1.1 ; ligands: EDO ; X-RAY DIFFRACTION 2.1950Å

e5o14B1[B:138-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein variant 1.1 ; X-RAY DIFFRACTION 2.1950Å

e5nqpA1[A:203-322] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein variant B16_001,Major outer membrane protein P.IA,Factor H binding protein variant B16_001 ; ligands: CL,EDO,SO4 ; X-RAY DIFFRACTION 2.86Å

e5nqzA2[A:203-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein,Major outer membrane protein P.IA,Factor H binding protein ; ligands: ACT,EDO,ZN ; X-RAY DIFFRACTION 1.63Å

e5nqxC2[C:203-321] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein,Major outer membrane protein P.IA,Factor H binding protein ; X-RAY DIFFRACTION 3.66Å

e5nqpC2[C:203-322] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein variant B16_001,Major outer membrane protein P.IA,Factor H binding protein variant B16_001 ; ligands: CL,EDO,SO4 ; X-RAY DIFFRACTION 2.86Å

e5nqpB1[B:203-321] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein variant B16_001,Major outer membrane protein P.IA,Factor H binding protein variant B16_001 ; ligands: EDO,SO4 ; X-RAY DIFFRACTION 2.86Å

e5nqyA1[A:203-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein variant B16_001,Major outer membrane protein P.IA,Factor H binding protein variant B16_001 ; X-RAY DIFFRACTION 2.60Å

e5nqzB1[B:203-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein,Major outer membrane protein P.IA,Factor H binding protein ; ligands: ACT,ZN ; X-RAY DIFFRACTION 1.63Å

e5nqxA2[A:203-321] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein,Major outer membrane protein P.IA,Factor H binding protein ; X-RAY DIFFRACTION 3.66Å

e5nqxB1[B:203-321] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein,Major outer membrane protein P.IA,Factor H binding protein ; X-RAY DIFFRACTION 3.66Å

e5nqxD2[D:203-321] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein,Major outer membrane protein P.IA,Factor H binding protein ; X-RAY DIFFRACTION 3.66Å

e5nqxE2[E:203-321] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein,Major outer membrane protein P.IA,Factor H binding protein ; X-RAY DIFFRACTION 3.66Å

e6h2yD2[D:145-262] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Lipoprotein GNA1870 ; X-RAY DIFFRACTION 2.65Å

e6xzwD1[D:138-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Lipoprot_C domain-containing protein ; ligands: EDO ; X-RAY DIFFRACTION 2.40Å

e7ketC2[C:138-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein ; X-RAY DIFFRACTION 2.0Å

e7lcvC2[C:138-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein ; X-RAY DIFFRACTION 1.70Å

e7nruA2[A:132-250] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Factor H binding protein variant 1-2,3.x ; X-RAY DIFFRACTION 1.219Å

e7sa6A2[A:141-255] Image Pymol Jmol Links: PDB, SCOP, CATH

Factor H-binding protein 2416 ; X-RAY DIFFRACTION 2.9Å

e7sbzC2[C:138-255] Image Pymol Jmol Links: PDB, SCOP, CATH

Factor H-binding protein ; ligands: CD ; X-RAY DIFFRACTION 2.9Å

e7sbzD1[D:138-255] Image Pymol Jmol Links: PDB, SCOP, CATH

Factor H-binding protein ; ligands: CD ; X-RAY DIFFRACTION 2.9Å

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