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:
e1q1hA1[A:1-88]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
Transcription Factor E ; X-RAY DIFFRACTION 2.90Å
e7od9F1[F:268-348] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
C-terminal domain of CheF from Methanococcus maripaludis ; ligands: BEF ; X-RAY DIFFRACTION 2.3Å
e6kf9G1[G:4-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription factor E ; ELECTRON MICROSCOPY
e5fywW2[W:6-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
TRANSCRIPTION INITIATION FACTOR IIE SUBUNIT ALPHA ; ELECTRON MICROSCOPY
e5iy6Q2[Q:11-100,Q:175-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e5fmfR1[R:12-95] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
TRANSCRIPTION INITIATION FACTOR IIE SUBUNIT ALPHA, TFA1 ; ELECTRON MICROSCOPY
e5iy8Q2[Q:11-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e5iyaQ2[Q:11-100,Q:175-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e5iycQ2[Q:11-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e5iy7Q2[Q:11-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e5iy9Q2[Q:11-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e5iybQ2[Q:11-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e5iydQ1[Q:11-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e5svah2[h:12-95] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit alpha ; ELECTRON MICROSCOPY
e5gpyA1[A:10-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; X-RAY DIFFRACTION 2.10Å
e5fz5W2[W:6-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
TRANSCRIPTION INITIATION FACTOR IIE SUBUNIT ALPHA ; ELECTRON MICROSCOPY
e6gylW2[W:4-99,W:170-194] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit alpha,Tfa1,Tfa1 ; ELECTRON MICROSCOPY
e6kf4G1[G:4-86] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription factor E ; ELECTRON MICROSCOPY
e6plnA1[A:5-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription factor E ; X-RAY DIFFRACTION 2.6Å
e6xjfA1[A:8-109] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription factor E ; X-RAY DIFFRACTION 3.1Å
e6xjfB1[B:7-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription factor E ; X-RAY DIFFRACTION 3.1Å
e6xjfC1[C:7-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription factor E ; X-RAY DIFFRACTION 3.1Å
e6xjfD1[D:8-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription factor E ; X-RAY DIFFRACTION 3.1Å
e6xjfE1[E:7-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription factor E ; X-RAY DIFFRACTION 3.1Å
e6xjfF1[F:7-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription factor E ; X-RAY DIFFRACTION 3.1Å
e6xjfG1[G:4-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription factor E ; X-RAY DIFFRACTION 3.1Å
e6xjfH1[H:7-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription factor E ; X-RAY DIFFRACTION 3.1Å
e7lbmQ2[Q:11-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e7eg9U2[U:11-100,U:175-203] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e7egaU1[U:11-100,U:175-203] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e7egbU2[U:11-100,U:175-203] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e7nvrW2[W:10-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e7nvsW2[W:10-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e7nvtW2[W:10-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e7nvuW2[W:10-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e7nvyW2[W:10-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e7nvzW1[W:10-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e7nw0W2[W:10-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e6plnB1[B:7-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription factor E ; X-RAY DIFFRACTION 2.6Å
e7egcU2[U:11-100,U:175-203] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e7enaEA1[EA:11-100,EA:175-203] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e7encEA2[EA:11-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e7ml0W2[W:4-99,W:170-194] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit alpha ; ELECTRON MICROSCOPY
e7ml1W1[W:4-99,W:170-194] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit alpha ; ELECTRON MICROSCOPY
e7ml2W1[W:4-99,W:170-194] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit alpha ; ELECTRON MICROSCOPY
e7ml4W1[W:4-99,W:170-194] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit alpha ; ELECTRON MICROSCOPY
e8gxqEA1[EA:10-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e8gxsEA2[EA:10-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e8bvwW2[W:10-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; ELECTRON MICROSCOPY
e8byqW2[W:10-103] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
General transcription factor IIE subunit 1 ; 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