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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

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

X: triple barrel
H: triple barrel
T: Rap30/74 interaction domains-like
F: TFIIF_beta_N

PF17683 CL0662

Representatives:

Domain assembly:

e1f3uA1[A:2-119] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION INITIATION FACTOR IIF, BETA SUBUNIT , X-RAY DIFFRACTION 1.7Å

e1f3uB1[B:5-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION INITIATION FACTOR IIF, BETA SUBUNIT , X-RAY DIFFRACTION 1.7Å

e1f3uE1[E:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION INITIATION FACTOR IIF, BETA SUBUNIT ; X-RAY DIFFRACTION 1.7Å

e1f3uC1[C:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION INITIATION FACTOR IIF, BETA SUBUNIT ; X-RAY DIFFRACTION 1.7Å

e4v1oR1[R:54-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION INITIATION FACTOR IIF SUBUNIT BETA ; ELECTRON MICROSCOPY

e5fmfV1[V:54-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION INITIATION FACTOR IIF SUBUNIT BETA, TFG2 ; ELECTRON MICROSCOPY

e5fywR1[R:58-138,R:207-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION INITIATION FACTOR IIF SUBUNIT BETA ; ELECTRON MICROSCOPY

e5iy6T1[T:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

General transcription factor IIF subunit 2 ; ELECTRON MICROSCOPY

e5svag1[g:54-139,g:210-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription initiation factor IIF subunit beta ; ELECTRON MICROSCOPY

e5iy7T1[T:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

General transcription factor IIF subunit 2 ; ELECTRON MICROSCOPY

e5iy8T1[T:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

General transcription factor IIF subunit 2 ; ELECTRON MICROSCOPY

e5iy9T1[T:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

General transcription factor IIF subunit 2 ; ELECTRON MICROSCOPY

e5iyaT1[T:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

General transcription factor IIF subunit 2 ; ELECTRON MICROSCOPY

e5iybT1[T:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

General transcription factor IIF subunit 2 ; ELECTRON MICROSCOPY

e5iycT1[T:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

General transcription factor IIF subunit 2 ; ELECTRON MICROSCOPY

e5iydT1[T:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

General transcription factor IIF subunit 2 ; ELECTRON MICROSCOPY

e5fz5R1[R:58-138,R:207-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION INITIATION FACTOR IIF SUBUNIT BETA ; ELECTRON MICROSCOPY

e7edxT1[T:2-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

General transcription factor IIF subunit 2 ; ELECTRON MICROSCOPY

e7eg7T1[T:2-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

General transcription factor IIF subunit 2 ; ELECTRON MICROSCOPY

e7eg9T1[T:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

General transcription factor IIF subunit 2 ; ELECTRON MICROSCOPY

e5oqjR2[R:58-138,R:207-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription initiation factor IIF subunit beta ; ELECTRON MICROSCOPY

e5oqmR1[R:58-138,R:207-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription initiation factor IIF subunit beta ; ELECTRON MICROSCOPY

e6gylR1[R:58-138,R:207-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription initiation factor IIF subunit beta ; ELECTRON MICROSCOPY

e6gymR2[R:58-138,R:207-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription initiation factor IIF subunit beta ; ELECTRON MICROSCOPY

e7ml4R1[R:58-138,R:207-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription initiation factor IIF subunit beta ; ELECTRON MICROSCOPY

e7meiM1[M:54-140,M:210-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription initiation factor IIF subunit beta ; ELECTRON MICROSCOPY

e7mk9M1[M:54-140,M:210-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription initiation factor IIF subunit beta ; ELECTRON MICROSCOPY

e7ui9Q1[Q:56-139,Q:209-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription initiation factor IIF subunit beta ; ELECTRON MICROSCOPY

e7uifQ1[Q:56-139,Q:209-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription initiation factor IIF subunit beta ; ELECTRON MICROSCOPY

e7uioAQ1[AQ:56-139,AQ:209-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription initiation factor IIF subunit beta ; ELECTRON MICROSCOPY

e7uioBQ1[BQ:56-139,BQ:209-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription initiation factor IIF subunit beta ; ELECTRON MICROSCOPY

Domain assembly:

e1f3uB1[B:5-153] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION INITIATION FACTOR IIF, ALPHA SUBUNIT , X-RAY DIFFRACTION 1.7Å

e1f3uA1[A:2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION INITIATION FACTOR IIF, ALPHA SUBUNIT , X-RAY DIFFRACTION 1.7Å

e1f3uG1[G:2-119] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION INITIATION FACTOR IIF, BETA SUBUNIT ; X-RAY DIFFRACTION 1.7Å

e4v1nR1[R:54-227] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION INITIATION FACTOR IIF SUBUNIT BETA ; ELECTRON MICROSCOPY

e5fj9N1[N:274-315,N:360-422] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA-DIRECTED RNA POLYMERASE III SUBUNIT RPC4 ; 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.

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