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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

X: TIM beta/alpha-barrel
H: TIM barrels
T: TIM barrels
F: Amidohydro_1

PF01979 CL0036

Representatives:

e1gkpA2[A:55-389] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDANTOINASE ; ligands: SO4,ZN ; X-RAY DIFFRACTION 1.300Å

e1gkqB2[B:55-389] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.600Å

e1gkpE2[E:55-389] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDANTOINASE ; ligands: SO4,ZN ; X-RAY DIFFRACTION 1.300Å

e1gkqA2[A:55-389] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.600Å

e1gkpB2[B:55-389] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDANTOINASE ; ligands: SO4,ZN ; X-RAY DIFFRACTION 1.300Å

e1gkpD2[D:55-389] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDANTOINASE ; ligands: SO4,ZN ; X-RAY DIFFRACTION 1.300Å

e1gkqC2[C:55-389] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.600Å

e1gkpF2[F:55-389] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDANTOINASE ; ligands: SO4,ZN ; X-RAY DIFFRACTION 1.300Å

e1gkqD2[D:55-389] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.600Å

e1gkpC2[C:55-389] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDANTOINASE ; ligands: SO4,ZN ; X-RAY DIFFRACTION 1.300Å

e1k1dB2[B:53-384] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 3.01Å

e1k1dG2[G:53-384] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 3.01Å

e1k1dD2[D:53-384] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 3.01Å

e1k1dH2[H:53-384] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 3.01Å

e1k1dF2[F:53-384] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 3.01Å

e1k1dE2[E:53-384] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 3.01Å

e1k1dA2[A:53-384] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 3.01Å

e1k1dC2[C:53-384] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 3.01Å

e1ynyB2[B:53-384] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-Hydantoinase ; ligands: MN ; X-RAY DIFFRACTION 2.30Å

e1ynyA2[A:53-384] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-Hydantoinase ; ligands: MN ; X-RAY DIFFRACTION 2.30Å

e1gkrB2[B:55-379] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NON-ATP DEPENDENT L-SELECTIVE HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.600Å

e1gkrC2[C:55-379] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NON-ATP DEPENDENT L-SELECTIVE HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.600Å

e1gkrD2[D:55-379] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NON-ATP DEPENDENT L-SELECTIVE HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.600Å

e3sfwA2[A:52-383] Image Pymol Jmol Links: PDB, SCOP, CATH

DIHYDROPYRIMIDINASE ; ligands: ACT,ZN ; X-RAY DIFFRACTION 1.73Å

e3d6nA1[A:56-365] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROOROTASE ; ligands: FLC,ZN ; X-RAY DIFFRACTION 2.3Å

e3sfwB2[B:52-383] Image Pymol Jmol Links: PDB, SCOP, CATH

DIHYDROPYRIMIDINASE ; ligands: ACT,ZN ; X-RAY DIFFRACTION 1.73Å

e2ftyA2[A:57-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROPYRIMIDINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.4Å

e2ftyB2[B:57-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROPYRIMIDINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.4Å

e2ftyC2[C:57-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROPYRIMIDINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.4Å

e2ftyD2[D:57-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROPYRIMIDINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.4Å

e2fvkB2[B:57-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROPYRIMIDINASE ; ligands: DUC,ZN ; X-RAY DIFFRACTION 2.4Å

e2fvkC2[C:57-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROPYRIMIDINASE ; ligands: DUC,ZN ; X-RAY DIFFRACTION 2.4Å

e2fvkD2[D:57-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROPYRIMIDINASE ; ligands: DUC,ZN ; X-RAY DIFFRACTION 2.4Å

e2fvmA2[A:57-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROPYRIMIDINASE ; ligands: URP,ZN ; X-RAY DIFFRACTION 2.45Å

e2fvmB2[B:57-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROPYRIMIDINASE ; ligands: URP,ZN ; X-RAY DIFFRACTION 2.45Å

e2fvmC2[C:57-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROPYRIMIDINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.45Å

e2fvmD2[D:57-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROPYRIMIDINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.45Å

e1nfgC3[C:53-387] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.7Å

e1nfgB3[B:53-387] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.7Å

e1nfgD3[D:53-387] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.7Å

e2gwnA4[A:58-375] Image Pymol Jmol Links: PDB, SCOP, CATH

DIHYDROOROTASE ; ligands: BME,CAC,CL,GOL,SO4,ZN ; X-RAY DIFFRACTION 1.85Å

e3e74B3[B:54-378] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Allantoinase ; ligands: FE ; X-RAY DIFFRACTION 2.100Å

e3e74A3[A:54-378] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Allantoinase ; ligands: FE ; X-RAY DIFFRACTION 2.100Å

e3e74D3[D:54-378] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Allantoinase ; ligands: FE ; X-RAY DIFFRACTION 2.100Å

e3e74C3[C:54-378] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Allantoinase ; ligands: FE ; X-RAY DIFFRACTION 2.100Å

e4kirA2[A:53-384] Image Pymol Jmol Links: PDB, SCOP, CATH

D-HYDANTOINASE ; ligands: MN ; X-RAY DIFFRACTION 2.8Å

e4kirB2[B:53-384] Image Pymol Jmol Links: PDB, SCOP, CATH

D-HYDANTOINASE ; ligands: MN ; X-RAY DIFFRACTION 2.8Å

e4kqnA2[A:53-384] Image Pymol Jmol Links: PDB, SCOP, CATH

D-hydantoinase ; ligands: MN ; X-RAY DIFFRACTION 2.8Å

e4kqnB2[B:53-384] Image Pymol Jmol Links: PDB, SCOP, CATH

D-hydantoinase ; ligands: MN ; X-RAY DIFFRACTION 2.8Å

e4tqtC2[C:56-392] Image Pymol Jmol Links: PDB, SCOP, CATH

D-hydantoinase ; ligands: EDO,ZN ; X-RAY DIFFRACTION 2.150Å

e4tqtD2[D:56-392] Image Pymol Jmol Links: PDB, SCOP, CATH

D-hydantoinase ; ligands: EDO,ZN ; X-RAY DIFFRACTION 2.150Å

e4tqtF2[F:56-392] Image Pymol Jmol Links: PDB, SCOP, CATH

D-hydantoinase ; ligands: EDO,ZN ; X-RAY DIFFRACTION 2.150Å

e4tqtA1[A:56-391] Image Pymol Jmol Links: PDB, SCOP, CATH

D-hydantoinase ; ligands: EDO,ZN ; X-RAY DIFFRACTION 2.150Å

e4tqtB1[B:56-391] Image Pymol Jmol Links: PDB, SCOP, CATH

D-hydantoinase ; ligands: EDO,ZN ; X-RAY DIFFRACTION 2.150Å

e4tqtE1[E:56-391] Image Pymol Jmol Links: PDB, SCOP, CATH

D-hydantoinase ; ligands: EDO,ZN ; X-RAY DIFFRACTION 2.150Å

e4bjhA2[A:56-365] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROOROTASE ; ligands: DOR,EDO,ZN ; X-RAY DIFFRACTION 2.20Å

e4c6eA2[A:1466-1742,A:1797-1823] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROOROTASE ; ligands: DOR,FMT,NCD,ZN ; X-RAY DIFFRACTION 1.26Å

e4c6fA2[A:1466-1742,A:1797-1823] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROOROTASE ; ligands: DOR,FMT,NCD,ZN ; X-RAY DIFFRACTION 1.26Å

e4c6iA1[A:1466-1742,A:1797-1822] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CAD PROTEIN ; ligands: DOR,FMT,NCD,ZN ; X-RAY DIFFRACTION 1.35Å

e4c6jA2[A:1466-1742,A:1797-1822] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CAD PROTEIN ; ligands: DOR,FMT,NCD,ZN ; X-RAY DIFFRACTION 1.3Å

e4c6kA1[A:1466-1742,A:1797-1822] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CAD PROTEIN ; ligands: DOR,FMT,NCD,ZN ; X-RAY DIFFRACTION 1.48Å

e4c6lA1[A:1466-1742,A:1797-1822] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CAD PROTEIN ; ligands: FMT,FOT,ZN ; X-RAY DIFFRACTION 1.55Å

e4c6mA1[A:1466-1742,A:1797-1822] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CAD PROTEIN ; ligands: FMT,FOT,ZN ; X-RAY DIFFRACTION 1.62Å

e4c6qA2[A:1466-1742,A:1797-1822] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CAD PROTEIN ; ligands: FMT,NCD,ORO,ZN ; X-RAY DIFFRACTION 1.66Å

e2z00A1[A:50-370] Image Pymol Jmol Links: PDB, SCOP, CATH

DIHYDROOROTASE ; ligands: ZN ; X-RAY DIFFRACTION 2.42Å

e4c6nA2[A:1466-1742,A:1797-1823] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CAD PROTEIN ; ligands: FMT,NCD,ZN ; X-RAY DIFFRACTION 1.9Å

e5e5cA1[A:54-391] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-hydantoinase/dihydropyrimidinase ; ligands: ZN ; X-RAY DIFFRACTION 2.10Å

e5e5cC2[C:54-391] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-hydantoinase/dihydropyrimidinase ; ligands: ZN ; X-RAY DIFFRACTION 2.10Å

e1p1mA2[A:50-330] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Hypothetical protein TM0936 ; ligands: MET,NI ; X-RAY DIFFRACTION 1.50Å

e4ubpC2[C:132-434,C:484-570] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (UREASE (CHAIN C)) ; ligands: HAE,NI ; X-RAY DIFFRACTION 1.550Å

e1xrtA2[A:56-188,A:209-262,A:285-365] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROOROTASE ; ligands: ZN ; X-RAY DIFFRACTION 1.61Å

e2eg6A1[A:4-346] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Dihydroorotase ; ligands: ZN ; X-RAY DIFFRACTION 1.7Å

e2p9bA2[A:71-82,A:112-394] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Possible prolidase ; X-RAY DIFFRACTION 1.7Å

e2imrA2[A:91-398] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Hypothetical protein DR_0824 ; ligands: ZN ; X-RAY DIFFRACTION 1.78Å

e4l9xB1[B:58-380] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Triazine hydrolase ; X-RAY DIFFRACTION 1.85Å

e1yrrA2[A:54-350] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

N-acetylglucosamine-6-phosphate deacetylase ; ligands: GOL,PO4 ; X-RAY DIFFRACTION 2.000Å

e2ftwA2[A:60-393] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROPYRIMIDINE AMIDOHYDROLASE ; ligands: MLI,ZN ; X-RAY DIFFRACTION 2.05Å

e2i9uA2[A:67-376] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Cytosine/guanine deaminase related protein ; ligands: FE,GOL,GUN ; X-RAY DIFFRACTION 2.05Å

e3la4A1[A:402-704,A:754-840] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UREASE ; ligands: NI,PO4 ; X-RAY DIFFRACTION 2.05Å

e4v1xE2[E:62-381] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATRAZINE CHLOROHYDROLASE ; ligands: FE,PEG ; X-RAY DIFFRACTION 2.20Å

e3nqbA2[A:86-338] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Adenine deaminase 2 ; ligands: MN ; X-RAY DIFFRACTION 2.205Å

e4wgxA2[A:62-405] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Molinate hydrolase ; ligands: CO,MPD ; X-RAY DIFFRACTION 2.29Å

e2qs8A2[A:64-373] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Xaa-Pro Dipeptidase ; ligands: MET,MG ; X-RAY DIFFRACTION 2.330Å

e2fvkA2[A:57-440] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DIHYDROPYRIMIDINASE ; ligands: DUC,ZN ; X-RAY DIFFRACTION 2.4Å

e1o12A2[A:44-331] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

N-acetylglucosamine-6-phosphate deacetylase ; ligands: FE ; X-RAY DIFFRACTION 2.500Å

e1gkrA2[A:55-379] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NON-ATP DEPENDENT L-SELECTIVE HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.600Å

e2oodA2[A:73-397] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Blr3880 protein ; ligands: GUN,ZN ; X-RAY DIFFRACTION 2.62Å

e1nfgA2[A:52-381] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-HYDANTOINASE ; ligands: ZN ; X-RAY DIFFRACTION 2.7Å

e2pajA2[A:70-361,A:381-405] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

putative cytosine/guanine deaminase ; ligands: ZN ; X-RAY DIFFRACTION 2.7Å

e4c5yA1[A:106-423] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OCHRATOXINASE ; ligands: ZN ; X-RAY DIFFRACTION 3.00Å

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.

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