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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

beta meanderssingle beta-sheet with mainly meander topology

beta sandwichestwo beta-sheets stacked together to form a sandwich

X: jelly-roll
H: Nucleoplasmin-like/VP (viral coat and capsid proteins)
T: Nucleoplasmin-like/VP (viral coat and capsid proteins)
F: DUF2961

PF11175 CL0055

Representatives:

e4kq7A1[A:45-207] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

hypothetical protein ; ligands: NA,PEG ; X-RAY DIFFRACTION 1.62Å

e4kq7B2[B:45-207] Image Pymol Jmol Links: PDB, SCOP, CATH

hypothetical protein ; ligands: NA,PEG ; X-RAY DIFFRACTION 1.62Å

e7v1vA1[A:3-199,A:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase (alphaFFase1) ; ligands: CA,TAR ; X-RAY DIFFRACTION 1.96Å

e7v1vB2[B:4-199,B:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase (alphaFFase1) ; ligands: CA,MPD ; X-RAY DIFFRACTION 1.96Å

e7v1vC2[C:4-199,C:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase (alphaFFase1) ; ligands: CA ; X-RAY DIFFRACTION 1.96Å

e7v1vD2[D:4-199,D:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase (alphaFFase1) ; ligands: CA,MPD,TAR ; X-RAY DIFFRACTION 1.96Å

e7v1vE2[E:4-199,E:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase (alphaFFase1) ; ligands: CA ; X-RAY DIFFRACTION 1.96Å

e7v1vF2[F:3-199,F:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase (alphaFFase1) ; ligands: CA ; X-RAY DIFFRACTION 1.96Å

e7v1wA2[A:3-199,A:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase (alphaFFase1) ; ligands: BXX,CA ; X-RAY DIFFRACTION 1.86Å

e7v1wB2[B:3-199,B:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase (alphaFFase1) ; ligands: BXX,CA ; X-RAY DIFFRACTION 1.86Å

e7v1wC2[C:3-199,C:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase (alphaFFase1) ; ligands: BXX,CA ; X-RAY DIFFRACTION 1.86Å

e7v1wD2[D:3-199,D:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase (alphaFFase1) ; ligands: BXX,CA ; X-RAY DIFFRACTION 1.86Å

e7v1wE2[E:3-199,E:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase (alphaFFase1) ; ligands: BXX,CA ; X-RAY DIFFRACTION 1.86Å

e7v1wF2[F:3-199,F:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase (alphaFFase1) ; ligands: BXX,CA ; X-RAY DIFFRACTION 1.86Å

e7v1xA2[A:3-199,A:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase ; ligands: CA,FRU ; X-RAY DIFFRACTION 1.76Å

e7v1xB2[B:3-199,B:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase ; ligands: CA,FRU ; X-RAY DIFFRACTION 1.76Å

e7v1xC2[C:3-199,C:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase ; ligands: CA,FRU ; X-RAY DIFFRACTION 1.76Å

e7v1xD2[D:3-199,D:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase ; ligands: CA,FRU ; X-RAY DIFFRACTION 1.76Å

e7v1xE2[E:3-199,E:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase ; ligands: CA,FRU ; X-RAY DIFFRACTION 1.76Å

e7v1xF2[F:3-199,F:404-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Difructose dianhydride I synthase/hydrolase ; ligands: CA,FRU ; X-RAY DIFFRACTION 1.76Å

e8ah3A1[A:26-188] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: CA ; X-RAY DIFFRACTION 1.40Å

e4kq7A2[A:208-417] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

hypothetical protein ; ligands: PG4 ; X-RAY DIFFRACTION 1.62Å

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.

X: Glycosyl hydrolase domain-like

some similarity with Ig fold

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