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
looks like an elaborated ferredoxin
Representatives:
e4nogB2[B:339-440] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Putative ornithine aminotransferase, mitochondrial ; ligands: ACT,BME ; X-RAY DIFFRACTION 1.2Å
e1vefA1[A:306-395] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
ACETYLORNITHINE/ACETYL-LYSINE AMINOTRANSFERASE ; X-RAY DIFFRACTION 1.35Å
e5g4iA2[A:333-440] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHOLYASE ; X-RAY DIFFRACTION 1.50Å
e5m4bA2[A:319-436] nonrep Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Aminotransferase class-III ; ligands: 7F7,EDO ; X-RAY DIFFRACTION 1.500Å
e1s0aA1[A:331-429] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Adenosylmethionine-8-amino-7-oxononanoate aminotransferase ; X-RAY DIFFRACTION 1.71Å
e1zodA2[A:326-433] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
2,2-DIALKYLGLYCINE DECARBOXYLASE ; ligands: MES ; X-RAY DIFFRACTION 1.8Å
e3n5mB2[B:341-449] Image Pymol Jmol Links: PDB, SCOP, CATH
Adenosylmethionine-8-amino-7-oxononanoate aminotransferase ; ligands: SO4 ; X-RAY DIFFRACTION 2.05Å
e3n5mD1[D:341-449] Image Pymol Jmol Links: PDB, SCOP, CATH
Adenosylmethionine-8-amino-7-oxononanoate aminotransferase ; ligands: SO4 ; X-RAY DIFFRACTION 2.05Å
e1d7rA1[A:326-433] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (2,2-DIALKYLGLYCINE DECARBOXYLASE (PYRUVATE)) ; ligands: 5PA ; X-RAY DIFFRACTION 2.0Å
e1d7sA1[A:326-433] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (2,2-DIALKYLGLYCINE DECARBOXYLASE (PYRUVATE)) ; ligands: DCS ; X-RAY DIFFRACTION 2.05Å
e1d7uA1[A:326-433] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (2,2-DIALKYLGLYCINE DECARBOXYLASE (PYRUVATE)) ; ligands: LCS ; X-RAY DIFFRACTION 1.95Å
e1d7vA1[A:326-433] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (2,2-DIALKYLGLYCINE DECARBOXYLASE (PYRUVATE)) ; ligands: NMA ; X-RAY DIFFRACTION 2.80Å
e1dgdA1[A:326-433] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIALKYLGLYCINE DECARBOXYLASE ; ligands: MES ; X-RAY DIFFRACTION
e1dgeA1[A:326-433] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIALKYLGLYCINE DECARBOXYLASE ; ligands: MES ; X-RAY DIFFRACTION
e1dkaA1[A:326-433] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,
2,2-DIALKYLGLYCINE DECARBOXYLASE (PYRUVATE) ; ligands: MES ; X-RAY DIFFRACTION
e1m0nA1[A:326-433] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
2,2-Dialkylglycine decarboxylase ; ligands: HCP ; X-RAY DIFFRACTION 2.2Å
e1m0oA1[A:326-433] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
2,2-Dialkylglycine decarboxylase ; ligands: MPM ; X-RAY DIFFRACTION 2.4Å
e1m0pA1[A:326-433] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
2,2-Dialkylglycine Decarboxylase ; ligands: ELP ; X-RAY DIFFRACTION 2.6Å
e1m0qA1[A:326-433] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
2,2-Dialkylglycine Decarboxylase ; ligands: EPC ; X-RAY DIFFRACTION 2.0Å
e1z3zA1[A:326-433] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
dialkylglycine decarboxylase ; ligands: MES ; X-RAY DIFFRACTION 2.9Å
e1zc9A1[A:326-433] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
2,2-DIALKYLGLYCINE DECARBOXYLASE ; X-RAY DIFFRACTION 2.0Å
e1zobA1[A:326-433] Image Pymol Jmol Links: PDB, SCOP, CATH
2,2-DIALKYLGLYCINE DECARBOXYLASE ; ligands: MES ; X-RAY DIFFRACTION 2.75Å
e2dkbA1[A:326-433] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,
2,2-DIALKYLGLYCINE DECARBOXYLASE (PYRUVATE) ; ligands: MES ; X-RAY DIFFRACTION
e3r4tA3[A:344-445] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-aminobutyrate aminotransferase GabT ; ligands: CL ; X-RAY DIFFRACTION 2.500Å
e3oksA3[A:346-446] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-aminobutyrate transaminase ; ligands: EDO,FMT ; X-RAY DIFFRACTION 1.800Å
e3oksB3[B:346-446] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-aminobutyrate transaminase ; ligands: EDO,FMT ; X-RAY DIFFRACTION 1.800Å
e3oksD3[D:346-446] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-aminobutyrate transaminase ; ligands: EDO,FMT ; X-RAY DIFFRACTION 1.800Å
e3oksC3[C:346-446] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-aminobutyrate transaminase ; ligands: EDO ; X-RAY DIFFRACTION 1.800Å
e3q8nA3[A:347-448] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-aminobutyrate transaminase ; X-RAY DIFFRACTION 2.050Å
e3q8nC3[C:347-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-aminobutyrate transaminase ; X-RAY DIFFRACTION 2.050Å
e3q8nD3[D:347-449] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-aminobutyrate transaminase ; X-RAY DIFFRACTION 2.050Å
e3q8nB3[B:347-448] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-aminobutyrate transaminase ; X-RAY DIFFRACTION 2.050Å
e4ffcA3[A:342-446] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-aminobutyrate aminotransferase (GabT) ; ligands: EDO ; X-RAY DIFFRACTION 1.800Å
e4ffcB3[B:342-446] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-aminobutyrate aminotransferase (GabT) ; X-RAY DIFFRACTION 1.800Å
e4ffcC3[C:342-447] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-aminobutyrate aminotransferase (GabT) ; ligands: EDO ; X-RAY DIFFRACTION 1.800Å
e4ffcD3[D:342-446] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-aminobutyrate aminotransferase (GabT) ; X-RAY DIFFRACTION 1.800Å
e4atpA3[A:348-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.8Å
e4atpC3[C:348-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.8Å
e4atpI3[I:348-456] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.8Å
e4atpH3[H:348-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.8Å
e4atpG3[G:348-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.8Å
e4atpD3[D:348-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.8Å
e4atpB3[B:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.8Å
e4atpE3[E:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.8Å
e4atqE3[E:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.75Å
e4atqJ3[J:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.75Å
e4atpJ3[J:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.8Å
e4atpL3[L:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.8Å
e3nuiB1[B:343-455] Image Pymol Jmol Links: PDB, SCOP, CATH
Pyruvate transaminase ; X-RAY DIFFRACTION 2.0Å
e4atqI2[I:349-456] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.75Å
e4atpF2[F:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.8Å
e4atpK2[K:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.8Å
e4atqA2[A:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.75Å
e4atqB2[B:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.75Å
e4atqC2[C:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.75Å
e4atqD2[D:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.75Å
e4atqF2[F:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.75Å
e4atqG2[G:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.75Å
e4atqH2[H:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.75Å
e4atqK2[K:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.75Å
e4atqL2[L:349-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-AMINOBUTYRATE TRANSAMINASE ; X-RAY DIFFRACTION 2.75Å
e4grxB2[B:345-453] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Aminotransferase ; X-RAY DIFFRACTION 2.600Å
e4grxD2[D:345-453] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Aminotransferase ; X-RAY DIFFRACTION 2.600Å
e3n5mA2[A:339-449] Image Pymol Jmol Links: PDB, SCOP, CATH
Adenosylmethionine-8-amino-7-oxononanoate aminotransferase ; ligands: SO4 ; X-RAY DIFFRACTION 2.05Å
e3n5mC2[C:339-449] Image Pymol Jmol Links: PDB, SCOP, CATH
Adenosylmethionine-8-amino-7-oxononanoate aminotransferase ; X-RAY DIFFRACTION 2.05Å
e3nuiA1[A:345-454] Image Pymol Jmol Links: PDB, SCOP, CATH
Pyruvate transaminase ; X-RAY DIFFRACTION 2.0Å
e4grxA2[A:345-453] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Aminotransferase ; ligands: DAV ; X-RAY DIFFRACTION 2.600Å
e4grxC2[C:345-453] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Aminotransferase ; ligands: DAV ; X-RAY DIFFRACTION 2.600Å
e4e3qA2[A:345-453] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PYRUVATE TRANSAMINASE ; ligands: BEN ; X-RAY DIFFRACTION 1.9Å
e4e3qD3[D:345-453] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PYRUVATE TRANSAMINASE ; X-RAY DIFFRACTION 1.9Å
e4e3qB2[B:345-453] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PYRUVATE TRANSAMINASE ; X-RAY DIFFRACTION 1.9Å
e4e3qC1[C:345-452] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PYRUVATE TRANSAMINASE ; X-RAY DIFFRACTION 1.9Å
e4e3rA2[A:345-453] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pyruvate transaminase ; X-RAY DIFFRACTION 1.9Å
e4e3rB1[B:345-453] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pyruvate transaminase ; X-RAY DIFFRACTION 1.9Å
e4e3rC2[C:345-452] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pyruvate transaminase ; X-RAY DIFFRACTION 1.9Å
e4e3rD1[D:345-452] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pyruvate transaminase ; X-RAY DIFFRACTION 1.9Å
e1sffA1[A:321-426] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
4-aminobutyrate aminotransferase ; ligands: SO4 ; X-RAY DIFFRACTION 1.9Å
e4uoxC2[C:353-458] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PUTRESCINE AMINOTRANSFERASE ; X-RAY DIFFRACTION 2.10Å
Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
contains a HTH motif
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