Evolutionary classification of protein domain structures
alpha arraysalpha-helix arrays with mainly perpendicular helices
X: Histone-like
H: Histone-related
T: AAA+ ATPase lid domain
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.
Representatives:
e4qosA1[A:165-257]
* 
nonrep
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Psp operon transcriptional activator ; ligands: ADP,GOL ; X-RAY DIFFRACTION 1.42Å
e2fnaA3[A:207-283]
nonrep
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Conserved hypothetical protein ; ligands: ADP,EDO ; X-RAY DIFFRACTION 2.00Å
e6pb3A2[A:226-306]
* nonrep
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Rhizobiales Sp. Pch2 ; X-RAY DIFFRACTION 2.048Å
e4xguA2[A:283-424]
* nonrep
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Putative pachytene checkpoint protein 2 ; X-RAY DIFFRACTION 2.29Å
e4xguD3[D:322-422]
nonrep
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Putative pachytene checkpoint protein 2 ; X-RAY DIFFRACTION 2.29Å
e1ny5A1[A:309-384]
nonrep
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transcriptional regulator (NtrC family) ; ligands: ADP,GOL,MG,PO4 ; X-RAY DIFFRACTION 2.4Å
e1l8qA2[A:242-289]
nonrep
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CHROMOSOMAL REPLICATION INITIATOR PROTEIN DNAA ; ligands: ADP ; X-RAY DIFFRACTION 2.7Å
e1sxjA2[A:479-547]
nonrep
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Activator 1 95 kDa subunit ; ligands: AGS ; X-RAY DIFFRACTION 2.85Å
e1sxjC6[C:168-232]
* nonrep
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Activator 1 40 kDa subunit ; ligands: AGS ; X-RAY DIFFRACTION 2.85Å
e2xszA1[A:338-362]
* nonrep
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RUVB-LIKE 1 ; X-RAY DIFFRACTION 3.00Å
e2xszB2[B:339-364]
* nonrep
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RUVB-LIKE 1 ; X-RAY DIFFRACTION 3.00Å
e2xszC1[C:338-363]
* nonrep
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RUVB-LIKE 1 ; X-RAY DIFFRACTION 3.00Å
e2xszE2[E:350-371]
* nonrep
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RUVB-LIKE 2 ; X-RAY DIFFRACTION 3.00Å
e5vq9D3[D:321-430]
nonrep
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Pachytene checkpoint protein 2 homolog ; X-RAY DIFFRACTION 3.02Å
e2z4rA3[A:263-335]
* nonrep
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CHROMOSOMAL REPLICATION INITIATOR PROTEIN DNAA ; ligands: ADP ; X-RAY DIFFRACTION 3.05Å
e4kxfK2[K:299-382]
nonrep
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NLR FAMILY CARD DOMAIN-CONTAINING PROTEIN 4 ; ligands: ADP ; X-RAY DIFFRACTION 3.2Å
e5irmA2[A:427-505]
nonrep
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Uncharacterized protein ; ligands: ADP ; X-RAY DIFFRACTION 3.3Å
e4ai6A11[A:2923-3371]
nonrep
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GLUTATHIONE S-TRANSFERASE CLASS-MU 26 KDA ISOZYME, DYNEIN HEAVY CHAIN CYTOPLASMIC ; ligands: ADP ; X-RAY DIFFRACTION 3.4Å
e4rh7A15[A:2812-2826,A:2847-2890,A:3195-3246]
nonrep
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Green fluorescent protein/Cytoplasmic dynein 2 heavy chain 1 ; ligands: ADP ; X-RAY DIFFRACTION 3.4Å
e1xxhF2[F:143-211]
nonrep
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DNA POLYMERASE III, DELTA SUBUNIT ; X-RAY DIFFRACTION 3.45Å
e5kzfJ4[J:343-506]
nonrep
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Proteasome-associated ATPase ; X-RAY DIFFRACTION 3.49Å
e3j67A9[A:2923-3402]
nonrep
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Dynein motor domain ; ELECTRON MICROSCOPY
e4v4lA3[A:290-360]
nonrep
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Apaf-1 related killer DARK ; ligands: DTP ; ELECTRON MICROSCOPY
e5gjqM4[M:421-439]
* nonrep
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26S protease regulatory subunit 6A ; ELECTRON MICROSCOPY
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
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