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
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
![](/ecod/img/m.gif)
![](/ecod/img/p.gif)
![](/ecod/img/p.gif)
![](/ecod/img/p.gif)
Representatives:
e1ldjA5[A:506-603]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
CULLIN HOMOLOG 1 ; X-RAY DIFFRACTION 3.0Å
e8tauN4[N:564-659] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8or0A1[A:509-618] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8or2A3[A:509-618] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8or4A5[A:509-618] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8gq6F5[F:472-562,F:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h33H5[H:472-562,H:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h33I3[I:472-562,I:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h33C3[C:472-562,C:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h34M2[M:472-562,M:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h34O4[O:472-562,O:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h34C5[C:472-562,C:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h34F1[F:472-562,F:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h34I2[I:472-562,I:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h34H4[H:472-562,H:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35C2[C:472-562,C:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35F5[F:472-562,F:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35I1[I:472-562,I:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35H2[H:472-562,H:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35M2[M:472-562,M:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35O5[O:472-562,O:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35T2[T:472-562,T:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35V2[V:472-562,V:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h36C4[C:472-562,C:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h36F3[F:472-562,F:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h37C5[C:472-562,C:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h37F4[F:472-562,F:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h37M3[M:472-562,M:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h37O3[O:472-562,O:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h38L2[L:472-562,L:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h3aL1[L:472-562,L:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h3fL4[L:472-562,L:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h3qC1[C:472-562,C:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h3rC2[C:472-562,C:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h3rF5[F:472-562,F:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e1ldkB4[B:521-618] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN HOMOLOG ; X-RAY DIFFRACTION 3.1Å
e1u6gA5[A:520-617] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN HOMOLOG 1 ; X-RAY DIFFRACTION 3.1Å
e4a0kA5[A:493-591] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-4A ; X-RAY DIFFRACTION 5.93Å
e3dplC1[C:494-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-5 ; X-RAY DIFFRACTION 2.550Å
e3rtrA1[A:506-603] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-1 ; X-RAY DIFFRACTION 3.21Å
e4a0cC2[C:647-745] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-4B ; X-RAY DIFFRACTION 3.80Å
e4f52C6[C:506-603] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; X-RAY DIFFRACTION 3.0Å
e3dqvD5[D:1494-1594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-5 ; X-RAY DIFFRACTION 3.0Å
e3dqvC5[C:1494-1594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-5 ; X-RAY DIFFRACTION 3.0Å
e3rtrE5[E:506-603] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-1 ; X-RAY DIFFRACTION 3.21Å
e3rtrG5[G:506-603] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-1 ; X-RAY DIFFRACTION 3.21Å
e4a0cE7[E:647-745] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-4B ; X-RAY DIFFRACTION 3.80Å
e4a0lH7[H:647-745] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-4B ; X-RAY DIFFRACTION 7.40Å
e4a0lE7[E:647-745] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-4B ; X-RAY DIFFRACTION 7.40Å
e4p5oA1[A:506-603] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; X-RAY DIFFRACTION 3.1Å
e4p5oC1[C:506-603] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; X-RAY DIFFRACTION 3.1Å
e3rtrC1[C:506-603] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-1 ; X-RAY DIFFRACTION 3.21Å
e4f52A1[A:506-603] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; X-RAY DIFFRACTION 3.0Å
e5n4wA2[A:476-592] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-2 ; X-RAY DIFFRACTION 3.900Å
e6q6gN2[N:564-659] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Anaphase-promoting complex subunit 2 ; ELECTRON MICROSCOPY
e6q6hN3[N:564-659] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Anaphase-promoting complex subunit 2 ; ELECTRON MICROSCOPY
e6r6hO1[O:476-592] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-2 ; ELECTRON MICROSCOPY
e6r7fO2[O:476-592] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-2 ; ELECTRON MICROSCOPY
e6r7iO5[O:476-592] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-2 ; ELECTRON MICROSCOPY
e6r7nO4[O:476-592] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-2 ; ELECTRON MICROSCOPY
e6ttuC1[C:506-603] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e6tljN5[N:564-659] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Anaphase-promoting complex subunit 2 ; ELECTRON MICROSCOPY
e6v9iC1[C:498-612] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Immunoglobulin G-binding protein G,Cullin-5 ; ELECTRON MICROSCOPY
e7b5lC4[C:507-618] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e6tntN1[N:564-659] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Anaphase-promoting complex subunit 2 ; ELECTRON MICROSCOPY
e7b5mC2[C:506-603] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7b5nC1[C:506-603] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7b5sC2[C:506-603] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7oniC2[C:495-595] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-5 ; ELECTRON MICROSCOPY
e7okqC3[C:493-591] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-4A ; ELECTRON MICROSCOPY
e7okqG3[G:493-591] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-4A ; ELECTRON MICROSCOPY
e7okqK3[K:493-591] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-4A ; ELECTRON MICROSCOPY
e7okqO3[O:493-591] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-4A ; ELECTRON MICROSCOPY
e7opce3[e:493-591] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-4A ; ELECTRON MICROSCOPY
e7opde3[e:493-591] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-4A ; ELECTRON MICROSCOPY
e7ploS3[S:475-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-2 ; ELECTRON MICROSCOPY
e7shkA3[A:475-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN_2 domain-containing protein ; ELECTRON MICROSCOPY
e7shlA2[A:475-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN_2 domain-containing protein ; ELECTRON MICROSCOPY
e7qe7N4[N:564-659] Image Pymol Jmol Links: PDB, SCOP, CATH
Anaphase-promoting complex subunit 2 ; ELECTRON MICROSCOPY
e8cdjC5[C:509-618] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e8cdkC4[C:509-618] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7z8rC1[C:509-618] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7z8tC5[C:509-618] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7z8vC1[C:509-618] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7zbwC5[C:509-618] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7zbzC3[C:509-618] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e8pkpN1[N:564-659] Image Pymol Jmol Links: PDB, SCOP, CATH
; ELECTRON MICROSCOPY
e8tarN1[N:564-659] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8or3A3[A:509-618] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8gq6C3[C:472-562,C:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8b3ie2[e:493-591] Image Pymol Jmol Links: PDB, SCOP, CATH
; ELECTRON MICROSCOPY
e8h33F5[F:472-562,F:587-594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
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