Evolutionary classification of protein domain structures
alpha arraysalpha-helix arrays with mainly perpendicular helices
alpha bundlesalpha-helix bundles with mainly parallel helices
X: DH domain-like
H: DBL homology domain (DH-domain)
T: DBL homology domain (DH-domain)
F: RhoGEF
Representatives:
e1ntyA2[A:1231-1414]
nonrep
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Pymol
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Triple functional domain protein ; X-RAY DIFFRACTION 1.7Å
e1txdA2[A:766-999]
nonrep
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Pymol
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Rho guanine nucleotide exchange factor 12 ; X-RAY DIFFRACTION 2.13Å
e2dfkA2[A:37-239]
nonrep
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Pymol
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COLLYBISTIN II ; ligands: GOL ; X-RAY DIFFRACTION 2.15Å
e1dbhA2[A:198-404]
nonrep
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Pymol
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PROTEIN (HUMAN SOS 1) ; X-RAY DIFFRACTION 2.3Å
e1ki1B2[B:1229-1438]
nonrep
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intersectin long form ; X-RAY DIFFRACTION 2.3Å
e1foeA2[A:1034-1239]
nonrep
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Pymol
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T-LYMPHOMA INVASION AND METASTASIS INDUCING PROTEIN 1 ; X-RAY DIFFRACTION 2.8Å
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