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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

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

e8oosG1[G:964-1160,G:1186-1211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: ADP,ALF,MG ; ELECTRON MICROSCOPY

e1z6aA2[A:432-661] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Helicase of the snf2/rad54 family ; ligands: HG,PO4 ; X-RAY DIFFRACTION 3.0Å

e1z63B2[B:432-661] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e3dmqB3[B:122-425] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: SO4

e4s20K5[K:122-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA polymerase-associated protein RapA ; X-RAY DIFFRACTION 4.7Å

e4s20L2[L:122-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA polymerase-associated protein RapA ; X-RAY DIFFRACTION 4.7Å

e5x0yO1[O:670-690,O:743-1003] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription regulatory protein SNF2 ; ELECTRON MICROSCOPY

e5vvrM2[M:229-388,M:442-578] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA repair and recombination protein RAD26 ; ELECTRON MICROSCOPY

e6bogA5[A:122-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA polymerase-associated protein RapA ; ligands: SO4 ; X-RAY DIFFRACTION 3.200Å

e6bogB4[B:122-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA polymerase-associated protein RapA ; ligands: SO4 ; X-RAY DIFFRACTION 3.200Å

e6eg3A1[A:703-955] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Maltose/maltodextrin-binding periplasmic protein,Probable global transcription activator SNF2L2 ; ligands: EOH,J7G ; X-RAY DIFFRACTION 2.84Å

e6g7eB1[B:1280-1542] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Helicase-like protein ; X-RAY DIFFRACTION 3.21Å

e6irnK1[K:184-422] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: ADP,BEF

e6k1pK1[K:184-422] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e6pwfK1[K:174-409] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

chromatin remodeling factor ISWI ; ELECTRON MICROSCOPY

e6kw3Y1[Y:392-412,Y:447-706,Y:928-974] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Nuclear protein STH1/NPS1 ; ELECTRON MICROSCOPY

e6kw4Y2[Y:392-412,Y:447-706,Y:928-974] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Nuclear protein STH1/NPS1 ; ELECTRON MICROSCOPY

e6ne3W1[W:166-405] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SWI/SNF-related matrix-associated actin-dependent regulator of chromatin subfamily A member 5 ; ligands: ADP ; ELECTRON MICROSCOPY

e6ryrW2[W:705-966] 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,MG ; ELECTRON MICROSCOPY

e6ryuW2[W:705-966] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e6ryuV2[V:705-966] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e6kw5Q2[Q:392-412,Q:447-706,Q:928-974] Image Pymol Jmol Links: PDB, SCOP, CATH

Nuclear protein STH1/NPS1 ; ELECTRON MICROSCOPY

e5z3lO1[O:670-690,O:743-1003] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription regulatory protein SNF2 ; ELECTRON MICROSCOPY

e5z3vO2[O:670-690,O:743-1003] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription regulatory protein SNF2 ; ligands: ADP,MG ; ELECTRON MICROSCOPY

e6g0lM5[M:348-606] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e7mknL1[L:122-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA polymerase-associated protein RapA ; ELECTRON MICROSCOPY

e7mkqL2[L:122-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA polymerase-associated protein RapA ; ELECTRON MICROSCOPY

e7m8eF5[F:122-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA polymerase-associated protein RapA ; ELECTRON MICROSCOPY

e7epuB2[B:16-270] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromodomain-helicase-DNA-binding protein 1-like ; ligands: ADP,MG ; X-RAY DIFFRACTION 3.500Å

e8atfG2[G:961-1211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ino80 ATPase ; ligands: ADP ; ELECTRON MICROSCOPY

e8he5O1[O:243-388,O:425-576] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8b3fb2[b:490-757] Image Pymol Jmol Links: PDB, SCOP, CATH

; ELECTRON MICROSCOPY

e8oo9G2[G:964-1160,G:1186-1211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: ADP,ALF,MG ; ELECTRON MICROSCOPY

e7ux9P1[P:200-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8b0aK1[K:42-271] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e7x3tV1[V:101-143,V:184-421] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

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