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:
e5iy6R1[R:147-206]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e5fmfS2[S:189-247] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
TRANSCRIPTION INITIATION FACTOR IIE SUBUNIT BETA, TFA2 ; ELECTRON MICROSCOPY
e5fz5X1[X:189-249] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
TRANSCRIPTION INITIATION FACTOR IIE SUBUNIT BETA ; ELECTRON MICROSCOPY
e5fywX1[X:188-249] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
TRANSCRIPTION INITIATION FACTOR IIE SUBUNIT BETA ; ELECTRON MICROSCOPY
e5svai1[i:188-250] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e5oqjX3[X:189-249] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e5oqmX2[X:189-249] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e6gylX3[X:189-249] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e6gymX2[X:189-249] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7ml0X3[X:189-249] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7ml1X3[X:189-249] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7ml2X3[X:189-249] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7ml4X3[X:189-249] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e5iy7R2[R:147-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e5iy8R2[R:147-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e5iy9R2[R:147-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e5iyaR2[R:147-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e5iybR2[R:147-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e5iycR2[R:147-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e5iydR2[R:147-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e5gpyB1[B:142-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; X-RAY DIFFRACTION 2.10Å
e6o9lR1[R:147-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7lbmR1[R:147-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7eg9V2[V:147-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7egaV2[V:147-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7egbV3[V:147-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7nvrX2[X:147-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7nvsX1[X:147-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7nvtX2[X:147-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7nvuX1[X:147-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7nvyX1[X:147-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7nvzX1[X:147-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7nw0X2[X:147-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7egcV2[V:147-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7enaEB3[EB:147-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e7encEB2[EB:147-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e8gxqEB1[EB:147-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e8gxsEB1[EB:147-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e8bvwX3[X:147-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; ELECTRON MICROSCOPY
e8byqX2[X:147-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Transcription initiation factor IIE subunit beta ; 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