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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: P-loop domains-like
H: P-loop domains-related
T: P-loop containing nucleoside triphosphate hydrolases
F: SNF2-rel_dom,Helicase_C

PF00176 PF00271

Representatives:

e5hzrA2[A:791-1009,A:1053-1128] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SNF2-family ATP dependent chromatin remodeling factor like protein ; ligands: KH2,SO4 ; X-RAY DIFFRACTION 2.3Å

e1z3iX1[X:390-735] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

similar to RAD54-like ; ligands: SO4,ZN ; X-RAY DIFFRACTION 3.000Å

e3mwyW4[W:607-922] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromo domain-containing protein 1 ; X-RAY DIFFRACTION 3.7Å

e5jxrA1[A:410-698] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromatin-remodeling complex ATPase-like protein ; X-RAY DIFFRACTION 2.4Å

e5jxrB1[B:410-698] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromatin-remodeling complex ATPase-like protein ; X-RAY DIFFRACTION 2.4Å

e5jxtE1[E:407-698] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromatin-remodeling complex ATPase-like protein ; X-RAY DIFFRACTION 3.0Å

e5jxtG1[G:407-714] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromatin-remodeling complex ATPase-like protein ; X-RAY DIFFRACTION 3.0Å

e5jxtK1[K:408-716] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromatin-remodeling complex ATPase-like protein ; X-RAY DIFFRACTION 3.0Å

e5jxtL1[L:407-717] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromatin-remodeling complex ATPase-like protein ; X-RAY DIFFRACTION 3.0Å

e5jxtI1[I:408-716] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromatin-remodeling complex ATPase-like protein ; X-RAY DIFFRACTION 3.0Å

e5jxtD1[D:407-713] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromatin-remodeling complex ATPase-like protein ; X-RAY DIFFRACTION 3.0Å

e5jxtJ1[J:408-698] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromatin-remodeling complex ATPase-like protein ; X-RAY DIFFRACTION 3.0Å

e6ryrW1[W:967-1212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromodomain-helicase-DNA-binding protein 4,Chromodomain-helicase-DNA-binding protein 4,Chromodomain-helicase-DNA-binding protein 4 ; ligands: ANP ; ELECTRON MICROSCOPY

e6ryuW1[W:967-1416] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromodomain-helicase-DNA-binding protein 4,CHD4,Chromodomain-helicase-DNA-binding protein 4 ; ligands: ANP ; ELECTRON MICROSCOPY

e6ryuV1[V:967-1416] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromodomain-helicase-DNA-binding protein 4,CHD4,Chromodomain-helicase-DNA-binding protein 4 ; ligands: ANP ; ELECTRON MICROSCOPY

e7ennK1[K:271-617] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromodomain-helicase-DNA-binding protein 1-like ; ligands: ADP,BEF ; ELECTRON MICROSCOPY

e7nkxW1[W:607-841] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromo domain-containing protein 1 ; ligands: ADP,BEF ; ELECTRON MICROSCOPY

e6iroL2[L:422-652] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ISWI chromatin-remodeling complex ATPase ISW1 ; ELECTRON MICROSCOPY

e6irmK2[K:422-657] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: ADP,BEF

e6jylK2[K:422-657] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ISWI chromatin-remodeling complex ATPase ISW1 ; ligands: ADP,BEF ; ELECTRON MICROSCOPY

e7otqK1[K:271-500] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromodomain-helicase-DNA-binding protein 1-like ; ELECTRON MICROSCOPY

e7oo3b2[b:755-1025,b:1383-1399] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA excision repair protein ERCC-6 ; ELECTRON MICROSCOPY

e5o9gW2[W:607-841,W:1006-1026] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromo domain-containing protein 1 ; ligands: ADP,BEF ; 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