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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

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

X: Ntn/PP2C
H: Ntn
T: Proteasome subunits
F: Proteasome

PF00227 CL0052

Representatives:

e1g3kA1[A:1-173] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP-DEPENDENT PROTEASE HSLV ; ligands: NA ; X-RAY DIFFRACTION 1.9Å

e1ryp11[1:-9-213] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

20S PROTEASOME ; ligands: MG ; X-RAY DIFFRACTION 1.9Å

e1ryp21[2:-8-225] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

20S PROTEASOME ; ligands: MG ; X-RAY DIFFRACTION 1.9Å

e1rypH1[H:-9-196] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

20S PROTEASOME ; ligands: MG ; X-RAY DIFFRACTION 1.9Å

e1rypJ1[J:-8-196] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

20S PROTEASOME ; ligands: MG ; X-RAY DIFFRACTION 1.9Å

e1rypK1[K:-1-197] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

20S PROTEASOME ; X-RAY DIFFRACTION 1.9Å

e1rypL1[L:1-212] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

20S PROTEASOME ; ligands: MG ; X-RAY DIFFRACTION 1.9Å

e1yarH1[H:1-203] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome beta subunit ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 1.9Å

e5l5aJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.4Å

e5l5aX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.4Å

e5l5bJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5bX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.8Å

e5l5dJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5dX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.8Å

e5l5eJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l5eX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.9Å

e5l5fJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.5Å

e5l5fX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.5Å

e5l5hJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5l5hX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.6Å

e5l5iJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l5iX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.9Å

e5l5jJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l5jX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.9Å

e5l5oJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5l5oX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.6Å

e5l5pJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5pX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.8Å

e5l5qJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5qX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.8Å

e5l5rJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.9Å

e5l5rX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.9Å

e5l5sJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5l5sX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.6Å

e5l5tJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l5tX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.9Å

e5l5uJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5l5uX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.6Å

e5l5vJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5l5vX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.7Å

e5l5wJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5wX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.8Å

e5l5xJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES,MG ; X-RAY DIFFRACTION 2.9Å

e5l5xX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 2.9Å

e5l5yJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES,MG ; X-RAY DIFFRACTION 2.7Å

e5l5yX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 2.7Å

e5l5zJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5l5zX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.7Å

e5l60J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES,MG ; X-RAY DIFFRACTION 2.7Å

e5l60X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 2.7Å

e5l61J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES,MG ; X-RAY DIFFRACTION 2.8Å

e5l61X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 2.8Å

e5l62J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES,MG ; X-RAY DIFFRACTION 2.8Å

e5l62X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES,MG ; X-RAY DIFFRACTION 2.8Å

e5l63J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES,MG ; X-RAY DIFFRACTION 2.7Å

e5l63X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 2.7Å

e5l64J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES,MG ; X-RAY DIFFRACTION 2.7Å

e5l64X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 2.7Å

e5l65J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l65X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.9Å

e5l66J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l66X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.8Å

e5l67J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5l67X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.6Å

e5l68J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l68X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.8Å

e5l69J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5l69X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.7Å

e5l6aJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l6aX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.8Å

e5l6bJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5l6bX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.6Å

e5l6cJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5l6cX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.6Å

e5lttJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5lttX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.7Å

e5l5aK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: MG ; X-RAY DIFFRACTION 2.4Å

e5l5aY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: MG ; X-RAY DIFFRACTION 2.4Å

e5l5bK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5bY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5dK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.8Å

e5l5dY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 04C,MES,MG ; X-RAY DIFFRACTION 2.8Å

e5l5eK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 3BV,MG ; X-RAY DIFFRACTION 2.9Å

e5l5eY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 3BV,MG ; X-RAY DIFFRACTION 2.9Å

e5l5fK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 2.5Å

e5l5fY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 2.5Å

e5l5hK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 39V,MG ; X-RAY DIFFRACTION 2.6Å

e5l5hY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 39V,MES,MG ; X-RAY DIFFRACTION 2.6Å

e5l5iK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 38X,MG ; X-RAY DIFFRACTION 2.9Å

e5l5iY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 38X,MES,MG ; X-RAY DIFFRACTION 2.9Å

e5l5jK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 6N5,MG ; X-RAY DIFFRACTION 2.9Å

e5l5jY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 6N5,MES,MG ; X-RAY DIFFRACTION 2.9Å

e5l5oK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 79P,MG ; X-RAY DIFFRACTION 2.6Å

e5l5oY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 79P,MES,MG ; X-RAY DIFFRACTION 2.6Å

e5l5pK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 79L,MES,MG ; X-RAY DIFFRACTION 2.8Å

e5l5pY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 79L,MES,MG ; X-RAY DIFFRACTION 2.8Å

e5l5qK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 6NV,MG ; X-RAY DIFFRACTION 2.8Å

e5l5qY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 6NV,MES,MG ; X-RAY DIFFRACTION 2.8Å

e5l5rK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l5rY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l5sK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 39V,MG ; X-RAY DIFFRACTION 2.6Å

e5l5sY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 39V,MG ; X-RAY DIFFRACTION 2.6Å

e5l5tK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 79P,MG ; X-RAY DIFFRACTION 2.9Å

e5l5tY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 79P,MG ; X-RAY DIFFRACTION 2.9Å

e5l5uK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.6Å

e5l5uY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.6Å

e5l5vK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 6NV,MG ; X-RAY DIFFRACTION 2.7Å

e5l5vY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 6NV,MG ; X-RAY DIFFRACTION 2.7Å

e5lttK1[K:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 39V,MES,MG ; X-RAY DIFFRACTION 2.7Å

e5lttY1[Y:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-8,Proteasome subunit beta type-5 ; ligands: 39V,MES,MG ; X-RAY DIFFRACTION 2.7Å

e5l54M1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.8Å

e5l54a1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l55M1[M:1-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.9Å

e5l55a1[a:1-229] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l5aM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.4Å

e5l5aa1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.4Å

e5l5bM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.8Å

e5l5ba1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5dM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.8Å

e5l5da1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5eM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.9Å

e5l5ea1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l5fM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.5Å

e5l5fa1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.5Å

e5l5hM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.6Å

e5l5ha1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5l5iM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.9Å

e5l5ia1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l5jM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.9Å

e5l5ja1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l5oM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.6Å

e5l5oa1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5l5pM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5pa1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5qM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.8Å

e5l5qa1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5rM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.9Å

e5l5ra1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l5sM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.6Å

e5l5sa1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5l5tM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.9Å

e5l5ta1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l5uM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.6Å

e5l5ua1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5l5vM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5l5va1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5l5wM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5wa1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5xM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.9Å

e5l5xa1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l5yM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5l5ya1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5l5zM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.7Å

e5l5za1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5l60M1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5l60a1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5l61M1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l61a1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l62M1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l62a1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l63M1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5l63a1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5l64M1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.7Å

e5l64a1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5l65M1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.9Å

e5l65a1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l66M1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.8Å

e5l66a1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l67M1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.6Å

e5l67a1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5l68M1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.8Å

e5l68a1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l69M1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.7Å

e5l69a1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5l6aM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.8Å

e5l6aa1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l6bM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.6Å

e5l6ba1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5l6cM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.6Å

e5l6ca1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5lttM1[M:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; X-RAY DIFFRACTION 2.7Å

e5ltta1[a:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-7 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e5l52N1[N:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: 6N5,MG ; X-RAY DIFFRACTION 2.7Å

e5l52b1[b:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: 6N5 ; X-RAY DIFFRACTION 2.7Å

e5l54N1[N:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l54b1[b:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; X-RAY DIFFRACTION 2.8Å

e5l55N1[N:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l55b1[b:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: CL ; X-RAY DIFFRACTION 2.9Å

e5l5aN1[N:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: MG ; X-RAY DIFFRACTION 2.4Å

e5l5ab1[b:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; X-RAY DIFFRACTION 2.4Å

e5l5bN1[N:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5bb1[b:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; X-RAY DIFFRACTION 2.8Å

e5l5dN1[N:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.8Å

e5l5db1[b:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: 04C ; X-RAY DIFFRACTION 2.8Å

e5l5eN1[N:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: 3BV,CL,MG ; X-RAY DIFFRACTION 2.9Å

e5l5eb1[b:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: 3BV,CL ; X-RAY DIFFRACTION 2.9Å

e5l5fN1[N:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: BO2,CL,MG ; X-RAY DIFFRACTION 2.5Å

e5l5fb1[b:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: BO2,CL,MG ; X-RAY DIFFRACTION 2.5Å

e5l5hN1[N:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5l5hb1[b:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; X-RAY DIFFRACTION 2.6Å

e5l5iN1[N:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l5ib1[b:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; X-RAY DIFFRACTION 2.9Å

e5l5jN1[N:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e5l5jb1[b:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; X-RAY DIFFRACTION 2.9Å

e5l5oN1[N:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e5l5ob1[b:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; X-RAY DIFFRACTION 2.6Å

e5l5pN1[N:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e5l5pb1[b:1-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-1 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

Previous Next

e5nyfA1[A:1-243] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Anbu ; ligands: NA,PO4 ; X-RAY DIFFRACTION 2.2Å

e1q5qA1[A:9-235] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASOME ALPHA-TYPE SUBUNIT 1 ; X-RAY DIFFRACTION 2.6Å

e1q5qH1[H:1-224] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASOME BETA-TYPE SUBUNIT 1 ; X-RAY DIFFRACTION 2.6Å

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 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