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
Representatives:
e2e9xD2[D:166-223] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GINS complex subunit 4 ; X-RAY DIFFRACTION 1.99Å
e8q6oK2[K:164-221] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8b9bF2[F:223-294] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8b9cF1[F:223-294] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e2ehoE2[E:165-213] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GINS COMPLEX SUBUNIT 4 ; ligands: SO4 ; X-RAY DIFFRACTION 3.0Å
e2e9xH2[H:166-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GINS complex subunit 4 ; ligands: SO4 ; X-RAY DIFFRACTION 1.99Å
e2q9qB2[B:166-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GINS complex subunit 4 ; X-RAY DIFFRACTION 2.36Å
e2q9qF2[F:166-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GINS complex subunit 4 ; X-RAY DIFFRACTION 2.36Å
e2ehoI2[I:165-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GINS COMPLEX SUBUNIT 4 ; ligands: SO4 ; X-RAY DIFFRACTION 3.0Å
e6rawN1[N:176-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e6razN2[N:176-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e6raxN1[N:176-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e6rayN1[N:176-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e6xtxD1[D:166-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e6xtyD2[D:166-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e7pfoG2[G:166-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e7ploG2[G:166-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e8b9dG2[G:166-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8ouwD2[D:165-224] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8q6oQ1[Q:164-221] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e3jc5D2[D:223-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e3jc6D2[D:223-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e3jc7D2[D:223-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e5u8sD1[D:223-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e5u8tD1[D:223-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e6hv9F2[F:223-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e6ptjD2[D:223-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e6ptnd2[d:223-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e6ptnD2[D:223-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e6ptoq1[q:223-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e6ptoD1[D:223-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e6ptod2[d:223-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e6u0mD2[D:223-293] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e6sklD1[D:223-294] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e7pmkD2[D:223-294] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e7pmnD2[D:223-294] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e7qhsD2[D:223-294] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e7z13D1[D:223-294] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e7z13K2[K:223-294] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DNA replication complex GINS protein SLD5 ; ELECTRON MICROSCOPY
e8b9aF1[F:223-294] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
looks like an elaborated ferredoxin
contains a HTH motif
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