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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: Uncharacterized protein VC_0899
H: Uncharacterized protein VC_0899
T: Uncharacterized protein VC_0899
F: DUF4478

PF14793

Representatives:

e2pmbA1[A:5-116] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Uncharacterized protein ; ligands: PO4 ; X-RAY DIFFRACTION 1.990Å

e2pmbB2[B:5-116] Image Pymol Jmol Links: PDB, SCOP, CATH

Uncharacterized protein ; ligands: GOL,PO4 ; X-RAY DIFFRACTION 1.990Å

e2pmbC2[C:5-116] Image Pymol Jmol Links: PDB, SCOP, CATH

Uncharacterized protein ; ligands: PO4 ; X-RAY DIFFRACTION 1.990Å

e2pmbD2[D:5-117] Image Pymol Jmol Links: PDB, SCOP, CATH

Uncharacterized protein ; ligands: PO4 ; X-RAY DIFFRACTION 1.990Å

e3bq9A2[A:1-106] Image Pymol Jmol Links: PDB, SCOP, CATH

Predicted Rossmann fold nucleotide-binding domain-containing protein ; ligands: GOL ; X-RAY DIFFRACTION 1.75Å

e3bq9B2[B:1-106] Image Pymol Jmol Links: PDB, SCOP, CATH

Predicted Rossmann fold nucleotide-binding domain-containing protein ; ligands: GOL ; X-RAY DIFFRACTION 1.75Å

e3gh1A2[A:2-108] Image Pymol Jmol Links: PDB, SCOP, CATH

Predicted nucleotide-binding protein ; X-RAY DIFFRACTION 1.832Å

e3gh1B2[B:2-108] Image Pymol Jmol Links: PDB, SCOP, CATH

Predicted nucleotide-binding protein ; X-RAY DIFFRACTION 1.832Å

e3gh1C2[C:2-113] Image Pymol Jmol Links: PDB, SCOP, CATH

Predicted nucleotide-binding protein ; X-RAY DIFFRACTION 1.832Å

e3gh1D2[D:2-108] Image Pymol Jmol Links: PDB, SCOP, CATH

Predicted nucleotide-binding protein ; X-RAY DIFFRACTION 1.832Å

e4npaB1[B:5-117] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative uncharacterized protein ; X-RAY DIFFRACTION 2.1Å

e4npaA2[A:5-127] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative uncharacterized protein ; X-RAY DIFFRACTION 2.1Å

e4npaC2[C:5-117] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative uncharacterized protein ; X-RAY DIFFRACTION 2.1Å

e4npaD3[D:6-116] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative uncharacterized protein ; X-RAY DIFFRACTION 2.1Å

e6gflA2[A:-1-106] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pyrimidine/purine nucleotide 5'-monophosphate nucleosidase ; X-RAY DIFFRACTION 2.48Å

e6gfmA1[A:-3-105] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pyrimidine/purine nucleotide 5'-monophosphate nucleosidase ; X-RAY DIFFRACTION 2.77Å

e6gflB2[B:-1-112] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pyrimidine/purine nucleotide 5'-monophosphate nucleosidase ; X-RAY DIFFRACTION 2.48Å

X: LuxS, MPP, ThrRS/AlaRS common domain

looks like an elaborated ferredoxin

X: ClpS-like

contains a HTH motif

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