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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

PF00176 CL0023

Representatives:

e5hzrA1[A:458-493,A:529-790] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e5jxrA2[A:87-409] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e5jxrB2[B:87-409] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e5x0xO1[O:670-690,O:743-1003] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription regulatory protein SNF2 ; ELECTRON MICROSCOPY

e6eg2A2[A:703-955] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Maltose/maltodextrin-binding periplasmic protein,Probable global transcription activator SNF2L2 ; ligands: IPA,J7J ; X-RAY DIFFRACTION 2.98Å

e7ennK2[K:28-270] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e6iroL1[L:101-142,L:184-421] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e6irmK1[K:101-143,K:184-421] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: ADP,BEF

e6jylK1[K:101-143,K:184-421] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e7otqK2[K:42-270] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e7oo3b1[b:490-754] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA excision repair protein ERCC-6 ; ELECTRON MICROSCOPY

e7oobb1[b:490-753] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA excision repair protein ERCC-6 ; ligands: ADP,BEF,MG ; ELECTRON MICROSCOPY

e7oopb1[b:490-753] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA excision repair protein ERCC-6 ; ELECTRON MICROSCOPY

e7opcb1[b:490-753] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA excision repair protein ERCC-6 ; ELECTRON MICROSCOPY

e7opdb1[b:490-753] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA excision repair protein ERCC-6 ; ELECTRON MICROSCOPY

e1z63A2[A:432-661] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Helicase of the snf2/rad54 family ; X-RAY DIFFRACTION 3.0Å

e1z3iX2[X:92-389] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e3mwyW3[W:348-606] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e3dmqA3[A:122-425] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

; ligands: SO4

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