Evolutionary classification of protein domain structures
alpha arraysalpha-helix arrays with mainly perpendicular helices
alpha bundlesalpha-helix bundles with mainly parallel helices
X: Ferritin/Heme oxygenase/4-helical cytokines
H: Ferritin/Heme oxygenase
T: Ferritin
F: Ferritin
Representatives:
e1lb3A1[A:6-184]
nonrep
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FERRITIN LIGHT CHAIN 1 ; ligands: CD,GOL,SO4 ; X-RAY DIFFRACTION 1.21Å
e1o9rA1[A:1-162]
nonrep
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AGROBACTERIUM TUMEFACIENS DPS ; ligands: FE,TRS ; X-RAY DIFFRACTION 1.45Å
e1jigA1[A:2-147]
nonrep
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Dlp-2 ; ligands: FE ; X-RAY DIFFRACTION 1.46Å
e1tjoA1[A:2-181]
nonrep
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Iron-rich dpsA-homolog protein ; ligands: FE,MG,NA,SO4 ; X-RAY DIFFRACTION 1.6Å
e1z6oA1[A:13-212]
nonrep
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FERRITIN LIGHT CHAIN ; ligands: CA,FE ; X-RAY DIFFRACTION 1.91Å
e1z6oM1[M:1-191]
nonrep
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FERRITIN HEAVY CHAIN ; ligands: FE ; X-RAY DIFFRACTION 1.91Å
e1umnA1[A:22-172]
nonrep
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DPS-LIKE PEROXIDE RESISTANCE PROTEIN ; ligands: CA,EPE ; X-RAY DIFFRACTION 1.950Å
e2fkzA1[A:1-154]
nonrep
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Bacterioferritin ; ligands: FE2,HEM,MG ; X-RAY DIFFRACTION 2.0Å
e1vlgA1[A:1-164]
nonrep
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ferritin ; ligands: FE,SO4 ; X-RAY DIFFRACTION 2.000Å
e1eumA1[A:2-162]
nonrep
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FERRITIN 1 ; X-RAY DIFFRACTION 2.05Å
e1nf4A1[A:4-172]
nonrep
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bacterioferritin ; ligands: FE2,FEC,SO4 ; X-RAY DIFFRACTION 2.05Å
e2fjcA1[A:27-177]
nonrep
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Antigen TpF1 ; ligands: FE ; X-RAY DIFFRACTION 2.45Å
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.
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