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
X: Protein kinase/SAICAR synthase/ATP-grasp
H: Protein kinase/SAICAR synthase/ATP-grasp
T: ATP-grasp
F: CPSase_L_D2
Representatives:
e1a9xA2[A:128-402]
nonrep
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Pymol
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CARBAMOYL PHOSPHATE SYNTHETASE (LARGE CHAIN) ; ligands: ADP,CL,K,MN,PO4 ; X-RAY DIFFRACTION 1.8Å
e1a9xA3[A:677-935]
nonrep
Image
Pymol
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CARBAMOYL PHOSPHATE SYNTHETASE (LARGE CHAIN) ; ligands: ADP,CL,K,MN,ORN,PO4 ; X-RAY DIFFRACTION 1.8Å
e1w96A1[A:184-450]
nonrep
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Pymol
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ACETYL-COENZYME A CARBOXYLASE ; ligands: S1A ; X-RAY DIFFRACTION 1.8Å
e2j9gA1[A:115-330]
nonrep
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Pymol
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BIOTIN CARBOXYLASE ; ligands: ANP,MG,SO4 ; X-RAY DIFFRACTION 2.05Å
e3hb9A2[A:151-369]
nonrep
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Pyruvate carboxylase ; ligands: ADP ; X-RAY DIFFRACTION 2.900Å
e3ho8D2[D:151-168,D:239-369]
nonrep
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Pyruvate carboxylase ; X-RAY DIFFRACTION 2.900Å
e3u9tA2[A:162-377]
nonrep
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Pymol
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Methylcrotonyl-CoA carboxylase, alpha-subunit ; X-RAY DIFFRACTION 2.900Å
e4rcnA2[A:114-131,A:199-344]
nonrep
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long-chain acyl-CoA carboxylase ; X-RAY DIFFRACTION 3.0Å
e3n6rA2[A:176-391]
nonrep
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PROPIONYL-COA CARBOXYLASE, ALPHA SUBUNIT ; X-RAY DIFFRACTION 3.2Å
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 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