Evolutionary classification of protein domain structures
alpha arraysalpha-helix arrays with mainly perpendicular helices
![](/ecod/img/m.gif)
![](/ecod/img/m.gif)
![](/ecod/img/m.gif)
![](/ecod/img/m.gif)
Representatives:
e1ldjA2[A:604-686]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
CULLIN HOMOLOG 1 ; X-RAY DIFFRACTION 3.0Å
e2hyeC2[C:592-675]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
Cullin-4A ; X-RAY DIFFRACTION 3.100Å
e8or0A2[A:603-649,A:673-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e6q6gN4[N:660-730] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Anaphase-promoting complex subunit 2 ; ELECTRON MICROSCOPY
e6q6hN2[N:660-730] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Anaphase-promoting complex subunit 2 ; ELECTRON MICROSCOPY
e8or2A1[A:603-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e6tljN2[N:660-730] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Anaphase-promoting complex subunit 2 ; ELECTRON MICROSCOPY
e8or4A2[A:603-650,A:676-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e6tntN5[N:660-730] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Anaphase-promoting complex subunit 2 ; ELECTRON MICROSCOPY
e8gq6F1[F:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h33H1[H:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e7qe7N2[N:660-720] Image Pymol Jmol Links: PDB, SCOP, CATH
Anaphase-promoting complex subunit 2 ; ELECTRON MICROSCOPY
e8pkpN2[N:660-720] Image Pymol Jmol Links: PDB, SCOP, CATH
; ELECTRON MICROSCOPY
e8h33I4[I:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h33C2[C:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8tarN2[N:660-720] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8h34M4[M:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h34O3[O:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h34C3[C:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h34F2[F:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h34I5[I:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h34H3[H:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35C5[C:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35F2[F:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35I2[I:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35H4[H:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35M5[M:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35O1[O:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35T3[T:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h35V1[V:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h36C1[C:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h36F4[F:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h37C2[C:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h37F3[F:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h37M5[M:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h37O2[O:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h38L5[L:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h3aL5[L:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h3fL3[L:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h3qC5[C:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h3rC4[C:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8h3rF4[F:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e4f52A2[A:603-689] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; X-RAY DIFFRACTION 3.0Å
e4a0cC5[C:746-829] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-4B ; X-RAY DIFFRACTION 3.80Å
e1ldkB2[B:603-685] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN HOMOLOG ; X-RAY DIFFRACTION 3.1Å
e1u6gA2[A:602-684] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN HOMOLOG 1 ; X-RAY DIFFRACTION 3.1Å
e3rtrA3[A:603-685] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-1 ; X-RAY DIFFRACTION 3.21Å
e4a0kA2[A:592-675] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-4A ; X-RAY DIFFRACTION 5.93Å
e4f52C8[C:604-688] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; X-RAY DIFFRACTION 3.0Å
e4a0cE9[E:746-829] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-4B ; X-RAY DIFFRACTION 3.80Å
e4a0lH9[H:746-829] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-4B ; X-RAY DIFFRACTION 7.40Å
e4a0lE9[E:746-829] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-4B ; X-RAY DIFFRACTION 7.40Å
e3rtrE8[E:604-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-1 ; X-RAY DIFFRACTION 3.21Å
e3rtrG8[G:604-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-1 ; X-RAY DIFFRACTION 3.21Å
e4p5oA4[A:604-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; X-RAY DIFFRACTION 3.1Å
e4p5oC4[C:604-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; X-RAY DIFFRACTION 3.1Å
e3rtrC4[C:604-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-1 ; X-RAY DIFFRACTION 3.21Å
e3dplC4[C:595-693] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-5 ; X-RAY DIFFRACTION 2.550Å
e3dqvD7[D:1595-1693] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-5 ; X-RAY DIFFRACTION 3.0Å
e3dqvC7[C:1595-1693] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN-5 ; X-RAY DIFFRACTION 3.0Å
e5n4wA5[A:577-654] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-2 ; X-RAY DIFFRACTION 3.900Å
e6r6hO4[O:577-655] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-2 ; ELECTRON MICROSCOPY
e6r7fO1[O:577-655] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-2 ; ELECTRON MICROSCOPY
e6r7iO2[O:577-655] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-2 ; ELECTRON MICROSCOPY
e6r7nO3[O:577-655] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-2 ; ELECTRON MICROSCOPY
e6v9iC3[C:595-689] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Immunoglobulin G-binding protein G,Cullin-5 ; ELECTRON MICROSCOPY
e7b5sC4[C:603-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7b5lC5[C:603-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7b5mC4[C:603-685] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7b5nC4[C:604-688] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7oniC4[C:596-692] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-5 ; ELECTRON MICROSCOPY
e7okqC5[C:592-674] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-4A ; ELECTRON MICROSCOPY
e7okqG5[G:592-674] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-4A ; ELECTRON MICROSCOPY
e7okqK5[K:592-674] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-4A ; ELECTRON MICROSCOPY
e7okqO5[O:592-674] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-4A ; ELECTRON MICROSCOPY
e7opce5[e:592-674] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-4A ; ELECTRON MICROSCOPY
e7opde5[e:592-674] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-4A ; ELECTRON MICROSCOPY
e7ploS5[S:578-657] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-2 ; ELECTRON MICROSCOPY
e7shkA5[A:578-658] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN_2 domain-containing protein ; ELECTRON MICROSCOPY
e7shlA4[A:578-646] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CULLIN_2 domain-containing protein ; ELECTRON MICROSCOPY
e8cdjC2[C:603-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e8cdkC5[C:603-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7z8rC5[C:603-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7z8tC4[C:603-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7z8vC3[C:603-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7zbwC4[C:603-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e7zbzC5[C:603-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-1 ; ELECTRON MICROSCOPY
e8or3A1[A:603-686] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8gq6C4[C:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
e8b3ie3[e:592-672] Image Pymol Jmol Links: PDB, SCOP, CATH
; ELECTRON MICROSCOPY
e8h33F3[F:595-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cullin-3 ; ELECTRON MICROSCOPY
![](/ecod/img/p.gif)
Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
![](/ecod/img/p.gif)
lacks the N-terminal helix, circularly permuted wing
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
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