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X - Possible homology level

H - Homology level

T - Topology level

F - Family level

* - Provisional representative


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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

X: LuxS, MPP, ThrRS/AlaRS common domain

looks like an elaborated ferredoxin

X: ClpS-like

contains a HTH motif

X: Cystatin-like
H: NTF2-like
T: NTF2-like
F: Lumazine_bd_2

PF12893 CL0051

Representatives:

e3blzA1[A:3-126] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO ; X-RAY DIFFRACTION 1.75Å

e3blzH1[H:3-125] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO,PEG ; X-RAY DIFFRACTION 1.75Å

e3blzB1[B:3-126] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO,PEG ; X-RAY DIFFRACTION 1.75Å

e3blzG1[G:3-126] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO,PEG ; X-RAY DIFFRACTION 1.75Å

e3blzL1[L:3-125] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO ; X-RAY DIFFRACTION 1.75Å

e3blzE1[E:3-126] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO ; X-RAY DIFFRACTION 1.75Å

e3blzI1[I:3-125] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO ; X-RAY DIFFRACTION 1.75Å

e3blzD1[D:3-126] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO ; X-RAY DIFFRACTION 1.75Å

e3blzC1[C:3-126] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO ; X-RAY DIFFRACTION 1.75Å

e3blzK1[K:3-125] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO ; X-RAY DIFFRACTION 1.75Å

e3blzF1[F:3-125] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO,PEG ; X-RAY DIFFRACTION 1.75Å

e3blzJ1[J:3-126] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO ; X-RAY DIFFRACTION 1.75Å

e3fkaA1[A:1-119] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized NTF-2 like protein ; ligands: ACT,EDO,UNL ; X-RAY DIFFRACTION 1.69Å

e3dukA1[A:0-124] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO ; X-RAY DIFFRACTION 2.200Å

e3fkaB1[B:0-119] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized NTF-2 like protein ; ligands: ACT,EDO,UNL ; X-RAY DIFFRACTION 1.69Å

e3fkaC1[C:1-119] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized NTF-2 like protein ; ligands: EDO,UNL ; X-RAY DIFFRACTION 1.69Å

e3fkaD1[D:1-119] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized NTF-2 like protein ; ligands: EDO,UNL ; X-RAY DIFFRACTION 1.69Å

e3dukB1[B:0-124] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO ; X-RAY DIFFRACTION 2.200Å

e3dukC1[C:0-124] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO ; X-RAY DIFFRACTION 2.200Å

e3dukD1[D:0-124] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: CL,EDO ; X-RAY DIFFRACTION 2.200Å

e3dukE1[E:0-124] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; ligands: EDO ; X-RAY DIFFRACTION 2.200Å

e3dukF1[F:0-124] Image Pymol Jmol Links: PDB, SCOP, CATH

NTF2-like protein of unknown function ; X-RAY DIFFRACTION 2.200Å

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 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