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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: alpha/beta-Hydrolases
H: alpha/beta-Hydrolases
T: alpha/beta-Hydrolases
F: Arb2

PF09757

Representatives:

e5ikkA2[A:420-680] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase clr3 ; ligands: EDO,MG,NO3,SO4 ; X-RAY DIFFRACTION 2.40Å

e5j8jA1[A:450-698] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; X-RAY DIFFRACTION 2.7Å

e6z6fA1[A:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; ELECTRON MICROSCOPY

e6z6fB2[B:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; ELECTRON MICROSCOPY

e6z6hA1[A:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; ELECTRON MICROSCOPY

e6z6hF1[F:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; ELECTRON MICROSCOPY

e6z6oA1[A:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; ELECTRON MICROSCOPY

e6z6oE1[E:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; ELECTRON MICROSCOPY

e6z6oI1[I:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; ELECTRON MICROSCOPY

e6z6oM1[M:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; ELECTRON MICROSCOPY

e6z6oB2[B:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; ELECTRON MICROSCOPY

e6z6oF2[F:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; ELECTRON MICROSCOPY

e6z6oJ1[J:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; ELECTRON MICROSCOPY

e6z6oN2[N:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; ELECTRON MICROSCOPY

e6z6pK2[K:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; ELECTRON MICROSCOPY

e6z6pL2[L:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; ELECTRON MICROSCOPY

e6z6hB1[B:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; ELECTRON MICROSCOPY

e6z6hG2[G:433-700] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone deacetylase HDA1 ; 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.

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