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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: Hedgehog/intein
H: Hedgehog/intein
T: AXH
F: AXH

PF08517 CL0363

Representatives:

e1oa8A1[A:562-689] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; ligands: NA ; X-RAY DIFFRACTION 1.700Å

e1oa8D1[D:562-689] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; ligands: NA ; X-RAY DIFFRACTION 1.700Å

e1oa8C1[C:562-689] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; ligands: NA ; X-RAY DIFFRACTION 1.700Å

e1oa8B1[B:562-689] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; X-RAY DIFFRACTION 1.700Å

e3qveA1[A:-1-342] Image Pymol Jmol Links: PDB, SCOP, CATH

HMG BOX-CONTAINING PROTEIN 1 ; ligands: EDO,SO4 ; X-RAY DIFFRACTION 2.04Å

e1v06A1[A:208-345] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HMG BOX-CONTAINING PROTEIN 1 ; SOLUTION NMR

e4aqpB1[B:564-689] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; ligands: NA,PEG ; X-RAY DIFFRACTION 2.45Å

e4j2lB1[B:567-689] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; X-RAY DIFFRACTION 3.15Å

e3qveB1[B:-1-342] Image Pymol Jmol Links: PDB, SCOP, CATH

HMG BOX-CONTAINING PROTEIN 1 ; ligands: EDO,SO4 ; X-RAY DIFFRACTION 2.04Å

e3qveC1[C:0-342] Image Pymol Jmol Links: PDB, SCOP, CATH

HMG BOX-CONTAINING PROTEIN 1 ; ligands: EDO,SO4 ; X-RAY DIFFRACTION 2.04Å

e4j2lA1[A:561-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; X-RAY DIFFRACTION 3.15Å

e4j2jC1[C:561-675] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; X-RAY DIFFRACTION 2.5Å

e4j2jA1[A:561-681] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; X-RAY DIFFRACTION 2.5Å

e4aptC1[C:564-688] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; X-RAY DIFFRACTION 2.5Å

e4aqpD1[D:564-688] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; ligands: NA ; X-RAY DIFFRACTION 2.45Å

e4aqpC1[C:564-689] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; ligands: NA,PEG ; X-RAY DIFFRACTION 2.45Å

e4j2jB1[B:561-678] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; X-RAY DIFFRACTION 2.5Å

e4aptD1[D:564-687] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; ligands: NA ; X-RAY DIFFRACTION 2.5Å

e4aqpA1[A:564-688] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; X-RAY DIFFRACTION 2.45Å

e4aptA1[A:564-688] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; X-RAY DIFFRACTION 2.5Å

e4aptB1[B:564-688] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; X-RAY DIFFRACTION 2.5Å

e2m41B1[B:567-689] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATAXIN-1 ; SOLUTION NMR

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