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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

a+b two layersone alpha-helix layer and one beta-sheet layer

X: Alpha-beta plaits
H: ACT-like
T: ACT-like
F: ACT

PF01842 CL0070

Representatives:

e1phzA1[A:19-115] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (PHENYLALANINE HYDROXYLASE) ; X-RAY DIFFRACTION 2.2Å

e1ygyA1[A:452-529] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-3-phosphoglycerate dehydrogenase ; X-RAY DIFFRACTION 2.3Å

e1ygyB1[B:452-529] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-3-phosphoglycerate dehydrogenase ; ligands: TAR ; X-RAY DIFFRACTION 2.3Å

e3dc2A1[A:452-529] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-3-PHOSPHOGLYCERATE DEHYDROGENASE ; ligands: SER ; X-RAY DIFFRACTION 2.7Å

e3dc2B1[B:452-529] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-3-PHOSPHOGLYCERATE DEHYDROGENASE ; ligands: SER,TLA ; X-RAY DIFFRACTION 2.7Å

e3ddnA1[A:452-529] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-3-PHOSPHOGLYCERATE DEHYDROGENASE ; X-RAY DIFFRACTION 2.4Å

e3ddnB1[B:452-529] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

D-3-PHOSPHOGLYCERATE DEHYDROGENASE ; ligands: TLA ; X-RAY DIFFRACTION 2.4Å

e2jheA1[A:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION REGULATOR TYRR ; ligands: AE3 ; X-RAY DIFFRACTION 2.30Å

e2jheB1[B:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION REGULATOR TYRR ; ligands: AE3,SO4 ; X-RAY DIFFRACTION 2.30Å

e2jheC1[C:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION REGULATOR TYRR ; ligands: PG4 ; X-RAY DIFFRACTION 2.30Å

e2jheD1[D:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION REGULATOR TYRR ; ligands: PG4 ; X-RAY DIFFRACTION 2.30Å

e3mtjA5[A:352-435] Image Pymol Jmol Links: PDB, SCOP, CATH

Homoserine dehydrogenase ; X-RAY DIFFRACTION 2.150Å

e6dzsA3[A:354-438] Image Pymol Jmol Links: PDB, SCOP, CATH

Homoserine dehydrogenase ; X-RAY DIFFRACTION 2.620Å

e6dzsB1[B:354-438] Image Pymol Jmol Links: PDB, SCOP, CATH

Homoserine dehydrogenase ; X-RAY DIFFRACTION 2.620Å

e6dzsC2[C:354-438] Image Pymol Jmol Links: PDB, SCOP, CATH

Homoserine dehydrogenase ; X-RAY DIFFRACTION 2.620Å

e6dzsD2[D:354-438] Image Pymol Jmol Links: PDB, SCOP, CATH

Homoserine dehydrogenase ; X-RAY DIFFRACTION 2.620Å

e3nrbA2[A:3-86] Image Pymol Jmol Links: PDB, SCOP, CATH

Formyltetrahydrofolate deformylase ; ligands: EDO ; X-RAY DIFFRACTION 2.05Å

e3obiA2[A:3-87] Image Pymol Jmol Links: PDB, SCOP, CATH

Formyltetrahydrofolate deformylase ; ligands: EDO ; X-RAY DIFFRACTION 1.95Å

e3nrbB1[B:5-83] Image Pymol Jmol Links: PDB, SCOP, CATH

Formyltetrahydrofolate deformylase ; ligands: EDO ; X-RAY DIFFRACTION 2.05Å

e3nrbC1[C:4-83] Image Pymol Jmol Links: PDB, SCOP, CATH

Formyltetrahydrofolate deformylase ; X-RAY DIFFRACTION 2.05Å

e3nrbD1[D:4-83] Image Pymol Jmol Links: PDB, SCOP, CATH

Formyltetrahydrofolate deformylase ; ligands: EDO ; X-RAY DIFFRACTION 2.05Å

e3obiB1[B:3-87] Image Pymol Jmol Links: PDB, SCOP, CATH

Formyltetrahydrofolate deformylase ; ligands: EDO ; X-RAY DIFFRACTION 1.95Å

e3obiC1[C:3-87] Image Pymol Jmol Links: PDB, SCOP, CATH

Formyltetrahydrofolate deformylase ; ligands: EDO ; X-RAY DIFFRACTION 1.95Å

e3obiD1[D:3-87] Image Pymol Jmol Links: PDB, SCOP, CATH

Formyltetrahydrofolate deformylase ; ligands: EDO ; X-RAY DIFFRACTION 1.95Å

e3w7bA1[A:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FORMYLTETRAHYDROFOLATE DEFORMYLASE ; X-RAY DIFFRACTION 2.71Å

e3w7bB1[B:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FORMYLTETRAHYDROFOLATE DEFORMYLASE ; X-RAY DIFFRACTION 2.71Å

e7alzA1[A:186-281] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Prephenate dehydratase ; ligands: PHE ; X-RAY DIFFRACTION 1.67Å

e7alzB1[B:186-281] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Prephenate dehydratase ; ligands: PHE ; X-RAY DIFFRACTION 1.67Å

e4go7X6[X:-17-93] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Aspartokinase ; ligands: THR ; X-RAY DIFFRACTION 2.0Å

e4go5X1[X:-17-93] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Aspartokinase ; X-RAY DIFFRACTION 2.6Å

e2qmwA1[A:185-264] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PREPHENATE DEHYDRATASE ; ligands: EDO ; X-RAY DIFFRACTION 2.3Å

e2j0wA1[A:295-385] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LYSINE-SENSITIVE ASPARTOKINASE 3 ; X-RAY DIFFRACTION 2.5Å

e3l76A2[A:259-353] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Aspartokinase ; ligands: LYS,SO4,THR ; X-RAY DIFFRACTION 2.54Å

e3l76A4[A:432-525] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Aspartokinase ; ligands: LYS,SO4,THR ; X-RAY DIFFRACTION 2.54Å

e5denD1[D:20-121] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phenylalanine-4-hydroxylase ; X-RAY DIFFRACTION 2.9Å

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.

X: LuxS, MPP, ThrRS/AlaRS common domain

looks like an elaborated ferredoxin

X: ClpS-like

contains a HTH motif

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