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




Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
Representatives:
e3pkvA1[A:2-53]
nonrep
Image
Pymol
Jmol Links:
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Toxoflavin lyase (TflA) ; X-RAY DIFFRACTION 1.340Å
e3pkvA2[A:54-125]
nonrep
Image
Pymol
Jmol Links:
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Toxoflavin lyase (TflA) ; X-RAY DIFFRACTION 1.340Å
e3pkvA4[A:197-222]
nonrep
Image
Pymol
Jmol Links:
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Toxoflavin lyase (TflA) ; X-RAY DIFFRACTION 1.340Å
a deteriorated duplicate
e1kw3B2[B:56-132]
nonrep
Image
Pymol
Jmol Links:
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2,3-Dihydroxybiphenyl dioxygenase ; ligands: MPD ; X-RAY DIFFRACTION 1.45Å
e5c68A1[A:59-121]
* nonrep
Image
Pymol
Jmol Links:
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CATH
Glyoxalase/bleomycin resistance protein/dioxygenase ; ligands: NA,NI ; X-RAY DIFFRACTION 1.46Å
e1f1uA2[A:71-147]
nonrep
Image
Pymol
Jmol Links:
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HOMOPROTOCATECHUATE 2,3-DIOXYGENASE ; X-RAY DIFFRACTION 1.5Å
e1f1uA3[A:148-207]
nonrep
Image
Pymol
Jmol Links:
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HOMOPROTOCATECHUATE 2,3-DIOXYGENASE ; ligands: MN ; X-RAY DIFFRACTION 1.5Å
e1xrkA2[A:56-121]
nonrep
Image
Pymol
Jmol Links:
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Bleomycin resistance protein ; ligands: BLM,SO4 ; X-RAY DIFFRACTION 1.5Å
e3pkxA4[A:197-221]
* nonrep
Image
Pymol
Jmol Links:
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Toxoflavin lyase (TflA) ; X-RAY DIFFRACTION 1.500Å
e1jifA1[A:1-54]
nonrep
Image
Pymol
Jmol Links:
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bleomycin-binding protein ; ligands: BLM ; X-RAY DIFFRACTION 1.6Å
e1jifA2[A:55-122]
nonrep
Image
Pymol
Jmol Links:
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bleomycin-binding protein ; ligands: BLM ; X-RAY DIFFRACTION 1.6Å
e2rk9A2[A:4-55]
* nonrep
Image
Pymol
Jmol Links:
PDB,
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CATH
Glyoxalase/bleomycin resistance protein/dioxygenase ; X-RAY DIFFRACTION 1.60Å
e1zswA2[A:72-144]
nonrep
Image
Pymol
Jmol Links:
PDB,
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CATH
Glyoxalase family protein ; X-RAY DIFFRACTION 1.65Å
e1zswA3[A:145-213]
nonrep
Image
Pymol
Jmol Links:
PDB,
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CATH
Glyoxalase family protein ; X-RAY DIFFRACTION 1.65Å
e1zswA4[A:214-314]
nonrep
Image
Pymol
Jmol Links:
PDB,
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CATH
Glyoxalase family protein ; ligands: BME,ZN ; X-RAY DIFFRACTION 1.65Å
e1ecsA1[A:2-53]
nonrep
Image
Pymol
Jmol Links:
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BLEOMYCIN RESISTANCE PROTEIN ; ligands: CA,PG4 ; X-RAY DIFFRACTION 1.7Å
e1ecsA2[A:54-121]
nonrep
Image
Pymol
Jmol Links:
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BLEOMYCIN RESISTANCE PROTEIN ; ligands: PG4 ; X-RAY DIFFRACTION 1.7Å
e4lqbA2[A:-2-61]
* nonrep
Image
Pymol
Jmol Links:
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Uncharacterized protein ; ligands: GOL ; X-RAY DIFFRACTION 1.72Å
e3oxhA20[A:135-196]
* nonrep
Image
Pymol
Jmol Links:
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RV0577 PROTEIN ; ligands: XYL ; X-RAY DIFFRACTION 1.750Å
e1sqdA1[A:98-173]
nonrep
Image
Pymol
Jmol Links:
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4-hydroxyphenylpyruvate dioxygenase ; X-RAY DIFFRACTION 1.8Å
e1sqdA2[A:270-410]
nonrep
Image
Pymol
Jmol Links:
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4-hydroxyphenylpyruvate dioxygenase ; ligands: FE ; X-RAY DIFFRACTION 1.8Å
e1sqdA3[A:14-97]
nonrep
Image
Pymol
Jmol Links:
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4-hydroxyphenylpyruvate dioxygenase ; X-RAY DIFFRACTION 1.8Å
e1sqdA4[A:181-266]
nonrep
Image
Pymol
Jmol Links:
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4-hydroxyphenylpyruvate dioxygenase ; ligands: FE ; X-RAY DIFFRACTION 1.8Å
e1xqaA1[A:1-55]
nonrep
Image
Pymol
Jmol Links:
PDB,
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CATH
GLYOXALASE/BLEOMYCIN RESISTANCE PROTEIN ; ligands: P6G ; X-RAY DIFFRACTION 1.8Å
e1xqaA2[A:56-112]
nonrep
Image
Pymol
Jmol Links:
PDB,
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CATH
GLYOXALASE/BLEOMYCIN RESISTANCE PROTEIN ; ligands: MG,P6G ; X-RAY DIFFRACTION 1.8Å
e1r9cA1[A:1-61]
nonrep
Image
Pymol
Jmol Links:
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GLUTATHIONE TRANSFERASE ; ligands: MN ; X-RAY DIFFRACTION 1.83Å
e1r9cA2[A:62-130]
nonrep
Image
Pymol
Jmol Links:
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GLUTATHIONE TRANSFERASE ; ligands: MN ; X-RAY DIFFRACTION 1.83Å
e1ss4A1[A:1-80]
nonrep
Image
Pymol
Jmol Links:
PDB,
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CATH
GLYOXALASE FAMILY PROTEIN ; ligands: ACT ; X-RAY DIFFRACTION 1.84Å
e1ss4A2[A:81-148]
nonrep
Image
Pymol
Jmol Links:
PDB,
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CATH
GLYOXALASE FAMILY PROTEIN ; ligands: CIT,FMT,GSH,NA ; X-RAY DIFFRACTION 1.84Å
e2pjsA1[A:2-55]
nonrep
Image
Pymol
Jmol Links:
PDB,
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CATH
UNCHARACTERIZED PROTEIN ATU1953 ; X-RAY DIFFRACTION 1.85Å
swap
e3iuzA1[A:1-206]
nonrep
Image
Pymol
Jmol Links:
PDB,
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CATH
Putative glyoxalase superfamily protein ; ligands: P6G,PGE ; X-RAY DIFFRACTION 1.90Å
e3p8aA3[A:183-273]
nonrep
Image
Pymol
Jmol Links:
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UNCHARACTERIZED PROTEIN ; ligands: CL,GOL,PG4 ; X-RAY DIFFRACTION 1.95Å
e3ct8A6[A:-5-57]
* nonrep
Image
Pymol
Jmol Links:
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Putative glyoxalase ; X-RAY DIFFRACTION 2.09Å
e1sqiA4[A:79-156]
nonrep
Image
Pymol
Jmol Links:
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4-hydroxyphenylpyruvic acid dioxygenase ; X-RAY DIFFRACTION 2.15Å
e3sk1C2[C:6-63]
* nonrep
Image
Pymol
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EhpR ; X-RAY DIFFRACTION 2.15Å
e2r5vA7[A:2-59]
* nonrep
Image
Pymol
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PCZA361.1 ; X-RAY DIFFRACTION 2.150Å
e2i7rA1[A:1-55]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH
Conserved domain protein ; X-RAY DIFFRACTION 2.200Å
e3e0rA7[A:151-183]
* nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH
C3-DEGRADING PROTEINASE (CPPA PROTEIN) ; X-RAY DIFFRACTION 2.3Å
e6on3D1[D:84-162]
* nonrep
Image
Pymol
Jmol Links:
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L-DOPA extradiol dioxygenase ; ligands: DAH,FE2 ; X-RAY DIFFRACTION 2.310Å
e5hmqA5[A:429-509]
* nonrep
Image
Pymol
Jmol Links:
PDB,
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CATH
4-hydroxyphenylpyruvate dioxygenase ; X-RAY DIFFRACTION 2.37Å
e6fb3A5[A:2593-2712]
nonrep
Image
Pymol
Jmol Links:
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Teneurin-2 ; ligands: NAG ; X-RAY DIFFRACTION 2.38Å
e4n04A2[A:2-54]
* nonrep
Image
Pymol
Jmol Links:
PDB,
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CATH
GLYOXALASE/BLEOMYCIN RESISTANCE PROTEIN/DIOXYGENASE ; ligands: NHE ; X-RAY DIFFRACTION 2.49Å
e2zw6A3[A:178-239]
* nonrep
Image
Pymol
Jmol Links:
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BLEOMYCIN ACETYLTRANSFERASE ; X-RAY DIFFRACTION 2.5Å
e4huzA7[A:76-137]
* nonrep
Image
Pymol
Jmol Links:
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2,6-DICHLORO-P-HYDROQUINONE 1,2-DIOXYGENASE ; X-RAY DIFFRACTION 2.6Å
e4huzA8[A:138-215]
* nonrep
Image
Pymol
Jmol Links:
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2,6-DICHLORO-P-HYDROQUINONE 1,2-DIOXYGENASE ; X-RAY DIFFRACTION 2.6Å
e1mpyA1[A:1-61]
nonrep
Image
Pymol
Jmol Links:
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CATECHOL 2,3-DIOXYGENASE ; X-RAY DIFFRACTION 2.8Å
e1u6lA1[A:2-76]
nonrep
Image
Pymol
Jmol Links:
PDB,
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CATH
hypothetical protein ; X-RAY DIFFRACTION 2.8Å
e1sp9A1[A:119-201]
nonrep
Image
Pymol
Jmol Links:
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SCOP,
CATH, PubMed,
DOI
4-HYDROXYPHENYLPYRUVATE DIOXYGENASE ; X-RAY DIFFRACTION 3.0Å
e1sp9A2[A:202-290]
nonrep
Image
Pymol
Jmol Links:
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CATH, PubMed,
DOI
4-HYDROXYPHENYLPYRUVATE DIOXYGENASE ; ligands: FE2 ; X-RAY DIFFRACTION 3.0Å
e1sp9A3[A:291-428]
nonrep
Image
Pymol
Jmol Links:
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CATH, PubMed,
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4-HYDROXYPHENYLPYRUVATE DIOXYGENASE ; ligands: FE2 ; X-RAY DIFFRACTION 3.0Å
e1sp9A4[A:33-118]
nonrep
Image
Pymol
Jmol Links:
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4-HYDROXYPHENYLPYRUVATE DIOXYGENASE ; X-RAY DIFFRACTION 3.0Å
e3opyA2[A:118-186]
nonrep
Image
Pymol
Jmol Links:
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6-phosphofructo-1-kinase alpha-subunit ; X-RAY DIFFRACTION 3.05Å
e3opyH1[H:5-68]
nonrep
Image
Pymol
Jmol Links:
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6-phosphofructo-1-kinase beta-subunit ; X-RAY DIFFRACTION 3.05Å
e3opyB2[B:5-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
6-phosphofructo-1-kinase beta-subunit ; X-RAY DIFFRACTION 3.05Å
e3opyF6[F:5-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
6-phosphofructo-1-kinase beta-subunit ; X-RAY DIFFRACTION 3.05Å
e3opyD1[D:5-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
6-phosphofructo-1-kinase beta-subunit ; X-RAY DIFFRACTION 3.05Å
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