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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

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

X: Rossmann-like
H: Tryptophan synthase beta subunit-like PLP-dependent enzymes
T: Tryptophan synthase beta subunit-like PLP-dependent enzymes
F: PALP

PF00291 CL0063

Representatives:

e1qopB1[B:2-200] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPTOPHAN SYNTHASE BETA CHAIN ; ligands: PLP ; X-RAY DIFFRACTION 1.400Å

e1qopB2[B:201-391] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPTOPHAN SYNTHASE BETA CHAIN ; ligands: NA,PLP ; X-RAY DIFFRACTION 1.400Å

e1ve1A1[A:1-147] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

O-ACETYLSERINE SULFHYDRYLASE ; ligands: PLP ; X-RAY DIFFRACTION 1.45Å

e1ve1A2[A:148-302] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

O-ACETYLSERINE SULFHYDRYLASE ; ligands: PLP ; X-RAY DIFFRACTION 1.45Å

e1v71A1[A:6-161] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL PROTEIN C320.14 IN CHROMOSOME III ; ligands: PLP ; X-RAY DIFFRACTION 1.7Å

e1v71A2[A:162-323] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL PROTEIN C320.14 IN CHROMOSOME III ; ligands: MG,PLP ; X-RAY DIFFRACTION 1.7Å

e1tyzA1[A:1-169] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-AMINOCYCLOPROPANE-1-CARBOXYLATE DEAMINASE ; ligands: PLP,SO4 ; X-RAY DIFFRACTION 2.0Å

e1tyzA2[A:170-338] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-AMINOCYCLOPROPANE-1-CARBOXYLATE DEAMINASE ; ligands: PLP,SO4 ; X-RAY DIFFRACTION 2.0Å

e1v7cA1[A:1-164] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

THREONINE SYNTHASE ; ligands: HEY ; X-RAY DIFFRACTION 2.0Å

e1v7cA2[A:165-351] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

THREONINE SYNTHASE ; ligands: HEY ; X-RAY DIFFRACTION 2.0Å

e1wkvA2[A:97-230] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYSTEINE SYNTHASE ; ligands: ACT,PLP ; X-RAY DIFFRACTION 2.0Å

e1wkvA3[A:231-383] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYSTEINE SYNTHASE ; ligands: PLP ; X-RAY DIFFRACTION 2.0Å

e1ve5A1[A:2-152] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

THREONINE DEAMINASE ; ligands: PLP ; X-RAY DIFFRACTION 2.15Å

e1ve5A2[A:153-311] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

THREONINE DEAMINASE ; ligands: CA,PLP ; X-RAY DIFFRACTION 2.15Å

e1vb3A2[A:85-221] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

THREONINE SYNTHASE ; ligands: KPA,SO4 ; X-RAY DIFFRACTION 2.2Å

e1e5xA2[A:131-270] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

THREONINE SYNTHASE ; X-RAY DIFFRACTION 2.25Å

e1e5xA3[A:271-486] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

THREONINE SYNTHASE ; X-RAY DIFFRACTION 2.25Å

e1j0aA1[A:1-164] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-AMINOCYCLOPROPANE-1-CARBOXYLATE DEAMINASE ; ligands: IPA,PLP,SO4 ; X-RAY DIFFRACTION 2.5Å

e1j0aA2[A:165-325] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-AMINOCYCLOPROPANE-1-CARBOXYLATE DEAMINASE ; ligands: PLP,SO4 ; X-RAY DIFFRACTION 2.5Å

e1p5jA1[A:4-142] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

L-serine dehydratase ; ligands: PLP ; X-RAY DIFFRACTION 2.5Å

e1p5jA2[A:143-322] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

L-serine dehydratase ; ligands: PLP ; X-RAY DIFFRACTION 2.5Å

e1jbqA1[A:43-231] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYSTATHIONINE BETA-SYNTHASE ; ligands: HEM,PLP ; X-RAY DIFFRACTION 2.6Å

e1jbqA2[A:232-397] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYSTATHIONINE BETA-SYNTHASE ; ligands: HEM,PLP ; X-RAY DIFFRACTION 2.6Å

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.

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