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




Representatives:
e1ik9A4[A:118-211]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
DNA REPAIR PROTEIN XRCC4 ; X-RAY DIFFRACTION 2.30Å
e5wlzB2[B:118-1739] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4,Myosin-7 ; X-RAY DIFFRACTION 3.5Å
e8bh3H2[H:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bh3P1[P:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bh3Q2[Q:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bhvK2[K:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bhvL1[L:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bhvN2[N:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bhvO1[O:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bhyG2[G:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bhyH1[H:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bhyP2[P:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bhyQ3[Q:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8botL3[L:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8botN2[N:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8botO1[O:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8ezaG1[G:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8ezaO2[O:118-201,O:267-278] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8ezaP1[P:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8ezbF2[F:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8ezbG3[G:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8ezbO1[O:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8ezbP3[P:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e1fu1A3[A:118-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA REPAIR PROTEIN XRCC4 ; ligands: ACY ; X-RAY DIFFRACTION 2.6Å
e1fu1B3[B:518-603] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA REPAIR PROTEIN XRCC4 ; X-RAY DIFFRACTION 2.6Å
e3ii6A3[A:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 2.29Å
e3ii6B3[B:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 2.29Å
e3ii6C3[C:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 2.29Å
e3ii6D3[D:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 2.29Å
e1ik9B3[B:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA REPAIR PROTEIN XRCC4 ; X-RAY DIFFRACTION 2.30Å
e6aboA3[A:118-213] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 2.65Å
e7lt3F2[F:117-201,F:267-278] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; ELECTRON MICROSCOPY
e7lsyF2[F:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; ELECTRON MICROSCOPY
e7lsyG1[G:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; ELECTRON MICROSCOPY
e7lsyO1[O:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; ELECTRON MICROSCOPY
e7lsyP3[P:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; ELECTRON MICROSCOPY
e7lt3G2[G:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; ELECTRON MICROSCOPY
e7lt3O1[O:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; ELECTRON MICROSCOPY
e7lt3P2[P:118-201,P:267-278] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; ELECTRON MICROSCOPY
e7nfcK1[K:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; ELECTRON MICROSCOPY
e7nfcL1[L:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; ELECTRON MICROSCOPY
e7nfcN1[N:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; ELECTRON MICROSCOPY
e7nfcO1[O:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; ELECTRON MICROSCOPY
e7nfeH1[H:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; ELECTRON MICROSCOPY
e7nfeI1[I:118-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; ELECTRON MICROSCOPY
e8bh3G2[G:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8ezaF2[F:117-201,F:267-278] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8botK1[K:117-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e3sr2B1[B:118-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA REPAIR PROTEIN XRCC4 ; X-RAY DIFFRACTION 3.97Å
e3sr2E1[E:118-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA REPAIR PROTEIN XRCC4 ; X-RAY DIFFRACTION 3.97Å
e3sr2F3[F:118-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA REPAIR PROTEIN XRCC4 ; X-RAY DIFFRACTION 3.97Å
e3rwrA1[A:118-147] Image Pymol Jmol Links: PDB, SCOP, CATH
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 3.9Å
e4xa4A1[A:117-1580] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Xrcc4-MYH7(1551-1609) chimera protein ; X-RAY DIFFRACTION 2.327Å
e4xa4B2[B:118-1580] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Xrcc4-MYH7(1551-1609) chimera protein ; X-RAY DIFFRACTION 2.327Å
e3w03C1[C:118-164] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA REPAIR PROTEIN XRCC4 ; X-RAY DIFFRACTION 8.49Å
e3w03D2[D:118-164] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA REPAIR PROTEIN XRCC4 ; X-RAY DIFFRACTION 8.49Å
e3sr2A2[A:118-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA REPAIR PROTEIN XRCC4 ; X-RAY DIFFRACTION 3.97Å
e3rwrB1[B:618-657] Image Pymol Jmol Links: PDB, SCOP, CATH
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 3.9Å
e3rwrF1[F:118-157] Image Pymol Jmol Links: PDB, SCOP, CATH
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 3.9Å
e3rwrG3[G:618-657] Image Pymol Jmol Links: PDB, SCOP, CATH
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 3.9Å
e3rwrJ2[J:118-157] Image Pymol Jmol Links: PDB, SCOP, CATH
DNA repair protein XRCC4 ; ligands: TBR ; X-RAY DIFFRACTION 3.9Å
e3rwrK3[K:618-657] Image Pymol Jmol Links: PDB, SCOP, CATH
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 3.9Å
e3rwrN2[N:118-157] Image Pymol Jmol Links: PDB, SCOP, CATH
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 3.9Å
e3rwrP3[P:618-657] Image Pymol Jmol Links: PDB, SCOP, CATH
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 3.9Å
e3rwrR1[R:118-157] Image Pymol Jmol Links: PDB, SCOP, CATH
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 3.9Å
e3rwrV1[V:618-657] Image Pymol Jmol Links: PDB, SCOP, CATH
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 3.9Å
e3rwrU3[U:118-157] Image Pymol Jmol Links: PDB, SCOP, CATH
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 3.9Å
e3rwrY3[Y:618-657] Image Pymol Jmol Links: PDB, SCOP, CATH
DNA repair protein XRCC4 ; ligands: TBR ; X-RAY DIFFRACTION 3.9Å
e3q4fC3[C:118-157] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 5.5Å
e3q4fD1[D:118-157] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 5.5Å
e3q4fG1[G:118-157] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 5.5Å
e3q4fH1[H:118-157] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4 ; X-RAY DIFFRACTION 5.5Å
e7m3pB1[B:118-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Xrcc4-Spc110p(164-207) ; X-RAY DIFFRACTION 2.0Å
e7m3pA2[A:117-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Xrcc4-Spc110p(164-207) ; X-RAY DIFFRACTION 2.0Å
e5cj4B2[B:117-1580] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Xrcc4-MYH7-(1562-1622) chimera protein ; X-RAY DIFFRACTION 3.1Å
e5cj4C3[C:117-1580] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Xrcc4-MYH7-(1562-1622) chimera protein ; X-RAY DIFFRACTION 3.1Å
e5cj4A1[A:118-1580] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Xrcc4-MYH7-(1562-1622) chimera protein ; X-RAY DIFFRACTION 3.1Å
e5cj4D1[D:118-1580] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Xrcc4-MYH7-(1562-1622) chimera protein ; X-RAY DIFFRACTION 3.1Å
e3mudA2[A:118-284] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4,Tropomyosin alpha-1 chain ; X-RAY DIFFRACTION 2.2Å
e3mudB1[B:118-283] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA repair protein XRCC4,Tropomyosin alpha-1 chain ; ligands: SO4 ; X-RAY DIFFRACTION 2.2Å
e5cj0A2[A:117-1689] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Xrcc4-MYH7-(1631-1692) chimera protein ; X-RAY DIFFRACTION 2.27Å
e5cj0B2[B:118-1689] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Xrcc4-MYH7-(1631-1692) chimera protein ; X-RAY DIFFRACTION 2.27Å
e5chxA2[A:118-1654] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Xrcc4-MYH7-1590-1657 ; X-RAY DIFFRACTION 2.1Å

Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
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
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