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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

X: HTH
H: HTH
T: winged
F: TFA2_Winged_2

PF18121 CL0123

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

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.

T: DNA-binding domain of intron-encoded endonucleases

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