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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

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

X: Flavodoxin-like
H: Class I glutamine amidotransferase-like
T: Rossmann-like domain in dehydroquinate synthase-like enzymes
F: Fe-ADH

PF00465 CL0224

Representatives:

e1o2dA2[A:1-178] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alcohol dehydrogenase, iron-containing ; ligands: NAP,TRS ; X-RAY DIFFRACTION 1.300Å

e1kq3A2[A:1-158] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

glycerol dehydrogenase ; ligands: CL,TRS,ZN ; X-RAY DIFFRACTION 1.500Å

e1rrmA2[A:2-185] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Lactaldehyde reductase ; ligands: APR,PGO ; X-RAY DIFFRACTION 1.6Å

e1vljA2[A:1-184] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

NADH-dependent butanol dehydrogenase ; ligands: NAP ; X-RAY DIFFRACTION 1.78Å

e1oj7A2[A:1-183] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYPOTHETICAL OXIDOREDUCTASE YQHD ; ligands: NZQ ; X-RAY DIFFRACTION 2.0Å

e1oj7C2[C:0-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYPOTHETICAL OXIDOREDUCTASE YQHD ; ligands: CL ; X-RAY DIFFRACTION 2.0Å

e1oj7D2[D:0-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYPOTHETICAL OXIDOREDUCTASE YQHD ; ligands: NZQ ; X-RAY DIFFRACTION 2.0Å

e1oj7B2[B:0-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYPOTHETICAL OXIDOREDUCTASE YQHD ; ligands: NZQ ; X-RAY DIFFRACTION 2.0Å

e1vhdA2[A:1-177] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ALCOHOL DEHYDROGENASE, IRON-CONTAINING ; ligands: CAC,NAP ; X-RAY DIFFRACTION 1.6Å

e1o2dB2[B:1-177] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alcohol dehydrogenase, iron-containing ; ligands: NAP,TRS ; X-RAY DIFFRACTION 1.300Å

e1vhdB2[B:1-177] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ALCOHOL DEHYDROGENASE, IRON-CONTAINING ; ligands: CAC,NAP ; X-RAY DIFFRACTION 1.6Å

e1rrmB2[B:2-184] Image Pymol Jmol Links: PDB, SCOP, CATH

Lactaldehyde reductase ; ligands: APR,PGO ; X-RAY DIFFRACTION 1.6Å

e2bi4B2[B:1002-1184] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LACTALDEHYDE REDUCTASE ; ligands: NAD ; X-RAY DIFFRACTION 2.85Å

e2bi4A2[A:2-184] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LACTALDEHYDE REDUCTASE ; ligands: CL,NAD ; X-RAY DIFFRACTION 2.85Å

e2bl4A2[A:2-184] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LACTALDEHYDE REDUCTASE ; ligands: CL,NAD ; X-RAY DIFFRACTION 2.85Å

e2bl4B2[B:1002-1184] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LACTALDEHYDE REDUCTASE ; ligands: NAD ; X-RAY DIFFRACTION 2.85Å

e1vljB2[B:0-183] Image Pymol Jmol Links: PDB, SCOP, CATH

NADH-dependent butanol dehydrogenase ; ligands: NAP ; X-RAY DIFFRACTION 1.78Å

e3hl0A2[A:1-159] Image Pymol Jmol Links: PDB, SCOP, CATH

Maleylacetate reductase ; ligands: CA,EPE,NAD ; X-RAY DIFFRACTION 1.6Å

e3iv7A2[A:3-158] Image Pymol Jmol Links: PDB, SCOP, CATH

Alcohol dehydrogenase IV ; ligands: EDO ; X-RAY DIFFRACTION 2.07Å

e3owoA2[A:2-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ALCOHOL DEHYDROGENASE 2 ; X-RAY DIFFRACTION 2.07Å

e3rf7A1[A:-5-183] Image Pymol Jmol Links: PDB, SCOP, CATH

Iron-containing alcohol dehydrogenase ; ligands: CA,CL,NAD,PEG,UNL ; X-RAY DIFFRACTION 2.12Å

e3bfjA2[A:4-184] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjB2[B:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjC2[C:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjD2[D:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjE2[E:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjF2[F:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjG2[G:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjH2[H:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjI2[I:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjJ2[J:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjK2[K:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjL2[L:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjM2[M:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjN2[N:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjO2[O:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjP2[P:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjQ2[Q:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjR2[R:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjS2[S:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3bfjT2[T:4-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-propanediol oxidoreductase ; X-RAY DIFFRACTION 2.650Å

e3hl0B2[B:1-159] Image Pymol Jmol Links: PDB, SCOP, CATH

Maleylacetate reductase ; ligands: CA,EPE ; X-RAY DIFFRACTION 1.6Å

e3iv7B2[B:3-158] Image Pymol Jmol Links: PDB, SCOP, CATH

Alcohol dehydrogenase IV ; ligands: EDO ; X-RAY DIFFRACTION 2.07Å

e3owoB2[B:2-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ALCOHOL DEHYDROGENASE 2 ; X-RAY DIFFRACTION 2.07Å

e3owoC2[C:2-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ALCOHOL DEHYDROGENASE 2 ; X-RAY DIFFRACTION 2.07Å

e3owoD2[D:3-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ALCOHOL DEHYDROGENASE 2 ; X-RAY DIFFRACTION 2.07Å

e3ox4A2[A:2-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ALCOHOL DEHYDROGENASE 2 ; ligands: NAD ; X-RAY DIFFRACTION 2.0Å

e3ox4B2[B:2-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ALCOHOL DEHYDROGENASE 2 ; ligands: NAD ; X-RAY DIFFRACTION 2.0Å

e3ox4C2[C:2-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ALCOHOL DEHYDROGENASE 2 ; ligands: NAD ; X-RAY DIFFRACTION 2.0Å

e3ox4D2[D:2-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ALCOHOL DEHYDROGENASE 2 ; ligands: NAD ; X-RAY DIFFRACTION 2.0Å

e4fr2A2[A:5-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,3-PROPANEDIOL DEHYDROGENASE ; X-RAY DIFFRACTION 3.2Å

e3zdrA2[A:459-647] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ALCOHOL DEHYDROGENASE DOMAIN OF THE BIFUNCTIONAL ACETALDEHYDE DEHYDROGENASE ; ligands: GOL ; X-RAY DIFFRACTION 2.504Å

e3w5sA2[A:1-159] Image Pymol Jmol Links: PDB, SCOP, CATH

Maleylacetate reductase ; ligands: BEN,GOL,SO4 ; X-RAY DIFFRACTION 1.49Å

e3w5sB2[B:1-159] Image Pymol Jmol Links: PDB, SCOP, CATH

Maleylacetate reductase ; ligands: SO4 ; X-RAY DIFFRACTION 1.49Å

e4qgsA1[A:2-182] Image Pymol Jmol Links: PDB, SCOP, CATH

Alcohol dehydrogenase YqhD ; ligands: CL ; X-RAY DIFFRACTION 1.7Å

e5br4A2[A:1-184] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Lactaldehyde reductase ; ligands: CL,GOL,NAD ; X-RAY DIFFRACTION 0.909Å

e5br4B1[B:2-184] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Lactaldehyde reductase ; ligands: CL,GOL,NAD ; X-RAY DIFFRACTION 0.909Å

e5k8cA2[A:-1-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-deoxy-alpha-D-manno-octulosonate 8-oxidase ; ligands: CL,NAD,PO4 ; X-RAY DIFFRACTION 1.85Å

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