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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

e4qwsW1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 3BV,MG ; X-RAY DIFFRACTION 3.0Å

e4qwuI1[I:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: BO2,MG ; X-RAY DIFFRACTION 3.0Å

e4qwuW1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: BO2,MG ; X-RAY DIFFRACTION 3.0Å

e4qwxI1[I:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASOME SUBUNIT BETA TYPE-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.9Å

e4qwxW1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASOME SUBUNIT BETA TYPE-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.9Å

e4qxjI1[I:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.8Å

e4qxjW1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.8Å

e4qz0I1[I:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 3.0Å

e4qz0W1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 3.0Å

e4qz1I1[I:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 3.0Å

e4qz1W1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 3.0Å

e4qz2I1[I:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.7Å

e4qz2W1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.7Å

e4qz3I1[I:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.8Å

e4qz3W1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.8Å

e4qz4I1[I:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 3.0Å

e4qz4W1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 3.0Å

e4qz5I1[I:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.8Å

e4qz5W1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.8Å

e4qz6I1[I:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.9Å

e4qz6W1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.9Å

e4qz7I1[I:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.8Å

e4qz7W1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.8Å

e4qzwI1[I:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 3.0Å

e4qzwW1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 3.0Å

e4qzxI1[I:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.6Å

e4qzxW1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: 04C,MG ; X-RAY DIFFRACTION 2.6Å

e4qzzI1[I:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e4qzzW1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: MG ; X-RAY DIFFRACTION 2.9Å

e4r00I1[I:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e4r00W1[W:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-3 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e4quxX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 3.0Å

e4quyJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4quyX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv0J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 3.1Å

e4qv0X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 3.1Å

e4qv1J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv1X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv3J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 3.0Å

e4qv3X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 3.0Å

e4qv4J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv4X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv5J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv5X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv6J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv6X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv7J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv7X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv8J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv8X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv9J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv9X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qvlJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qvlX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qvmJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qvmX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qvnJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qvnX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qvpJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 2.3Å

e4qvpX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 2.3Å

e4qvqJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qvqX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qvvJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qvvX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qvwJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 3.0Å

e4qvwX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 3.0Å

e4qvyJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASOME SUBUNIT BETA TYPE-4 ; ligands: MG ; X-RAY DIFFRACTION 2.5Å

e4qvyX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASOME SUBUNIT BETA TYPE-4 ; X-RAY DIFFRACTION 2.5Å

e4qw0J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qw0X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qw1J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qw1X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qw3J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qw3X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qw4J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qw4X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qw5J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 3.0Å

e4qw5X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 3.0Å

e4qw6J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qw6X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qw7J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qw7X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qwfJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 3.0Å

e4qwfX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 3.0Å

e4qwgJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qwgX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qwiJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qwiX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qwjJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qwjX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qwkJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qwkX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qwlJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qwlX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qwrJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qwrX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qwsJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 3.0Å

e4qwsX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 3.0Å

e4qwuJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MG ; X-RAY DIFFRACTION 3.0Å

e4qwuX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 3.0Å

e4qwxJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASOME SUBUNIT BETA TYPE-4 ; ligands: MES ; X-RAY DIFFRACTION 2.9Å

e4qwxX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASOME SUBUNIT BETA TYPE-4 ; ligands: MES,MG ; X-RAY DIFFRACTION 2.9Å

e4qxjJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qxjX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qz0J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 3.0Å

e4qz0X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 3.0Å

e4qz1J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 3.0Å

e4qz1X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 3.0Å

e4qz2J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qz2X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qz3J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qz3X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qz4J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 3.0Å

e4qz4X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 3.0Å

e4qz5J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qz5X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qz6J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qz6X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qz7J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qz7X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qzwJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; X-RAY DIFFRACTION 3.0Å

e4qzwX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-4 ; ligands: MES ; X-RAY DIFFRACTION 3.0Å

e4qzxJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qzxX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qzzJ1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qzzX1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4r00J1[J:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4r00X1[X:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv1K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv1Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv3K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; X-RAY DIFFRACTION 3.0Å

e4qv3Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: MG ; X-RAY DIFFRACTION 3.0Å

e4qv4K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e4qv4Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e4qv5K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e4qv5Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: MG ; X-RAY DIFFRACTION 2.7Å

e4qv7K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e4qv7Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e4qv8K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv8Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qv9K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e4qv9Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: MG ; X-RAY DIFFRACTION 2.6Å

e4qvlK1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 2.8Å

e4qvlY1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 2.8Å

e4qvmK1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 2.8Å

e4qvmY1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 2.8Å

e4qvnK1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 2.9Å

e4qvnY1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2 ; X-RAY DIFFRACTION 2.9Å

e4qvpK1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 2.3Å

e4qvpY1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 2.3Å

e4qvqK1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 2.6Å

e4qvqY1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 2.6Å

e4qw1K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 2.9Å

e4qw1Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 2.9Å

e4qw3K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2 ; X-RAY DIFFRACTION 2.9Å

e4qw3Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 2.9Å

e4qw4K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 3BV,MES,MG ; X-RAY DIFFRACTION 2.8Å

e4qw4Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 3BV,MES,MG ; X-RAY DIFFRACTION 2.8Å

e4qw5K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 3BV,MES,MG ; X-RAY DIFFRACTION 3.0Å

e4qw5Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 3BV,MES,MG ; X-RAY DIFFRACTION 3.0Å

e4qw6K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qw6Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qw7K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 3BV,MES,MG ; X-RAY DIFFRACTION 2.7Å

e4qw7Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 3BV,MES,MG ; X-RAY DIFFRACTION 2.7Å

e4qwfK1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 3BV,MES,MG ; X-RAY DIFFRACTION 3.0Å

e4qwfY1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 3BV,MES,MG ; X-RAY DIFFRACTION 3.0Å

e4qwlK1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 3BV,MES,MG ; X-RAY DIFFRACTION 2.6Å

e4qwlY1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 3BV,MES,MG ; X-RAY DIFFRACTION 2.6Å

e4qwrK1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qwrY1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qwsK1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 3BV,MES,MG ; X-RAY DIFFRACTION 3.0Å

e4qwsY1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 3BV,MES,MG ; X-RAY DIFFRACTION 3.0Å

e4qwuK1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 3.0Å

e4qwuY1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: BO2,MG ; X-RAY DIFFRACTION 3.0Å

e4qwxK1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASOME SUBUNIT BETA TYPE-5 ; ligands: 04C,MES,MG,NA ; X-RAY DIFFRACTION 2.9Å

e4qwxY1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASOME SUBUNIT BETA TYPE-5 ; ligands: 04C,MES,MG,NA ; X-RAY DIFFRACTION 2.9Å

e4qxjK1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qxjY1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qz0K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 04C,MES,MG ; X-RAY DIFFRACTION 3.0Å

e4qz0Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 04C,MES,MG ; X-RAY DIFFRACTION 3.0Å

e4qz1K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 04C,MES,MG ; X-RAY DIFFRACTION 3.0Å

e4qz1Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 04C,MES,MG ; X-RAY DIFFRACTION 3.0Å

e4qz2K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 04C,MES,MG ; X-RAY DIFFRACTION 2.7Å

e4qz2Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: 04C,MES,MG ; X-RAY DIFFRACTION 2.7Å

e4qz7K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qz7Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qzwK1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: MES,MG ; X-RAY DIFFRACTION 3.0Å

e4qzwY1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-5 ; ligands: MES,MG ; X-RAY DIFFRACTION 3.0Å

e4qzxK1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qzxY1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qzzK1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4qzzY1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4r00K1[K:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4r00Y1[Y:1-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e4quxZ1[Z:1-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-6 ; ligands: MG ; X-RAY DIFFRACTION 3.0Å

e4quyL1[L:1-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-6 ; X-RAY DIFFRACTION 2.8Å

e4quyZ1[Z:1-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-6 ; ligands: MG ; X-RAY DIFFRACTION 2.8Å

e4qv0L1[L:1-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-6 ; ligands: MG ; X-RAY DIFFRACTION 3.1Å

e4qv0Z1[Z:1-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-6 ; X-RAY DIFFRACTION 3.1Å

e4qv1L1[L:1-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proteasome subunit beta type-6 ; ligands: MG ; X-RAY DIFFRACTION 2.5Å

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