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




Representatives:
e3mwdA2[A:246-425]
* nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
ATP-CITRATE SYNTHASE ; ligands: CIT ; X-RAY DIFFRACTION 2.1Å
e3pffA2[A:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: MG,TLA ; X-RAY DIFFRACTION 2.3Å
e3mweA2[A:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-CITRATE SYNTHASE ; ligands: MG,TLA ; X-RAY DIFFRACTION 2.2Å
e5tdeA2[A:246-431] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: 2HP,FLC,GOL,NA ; X-RAY DIFFRACTION 1.700Å
e5tdfA2[A:246-431] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: 7A3,GOL,MG ; X-RAY DIFFRACTION 1.800Å
e5tdmA1[A:246-431] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: 7A2,MG ; X-RAY DIFFRACTION 2.100Å
e5tdzA1[A:246-431] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: GOL,PO4,TLA ; X-RAY DIFFRACTION 2.000Å
e5tesA2[A:246-431] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: FLC,MG ; X-RAY DIFFRACTION 2.400Å
e5tetA2[A:246-431] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: 7A3,PO4 ; X-RAY DIFFRACTION 2.200Å
e5te1A1[A:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: 7A2,NA,PO4 ; X-RAY DIFFRACTION 2.25Å
e5te1B1[B:246-426] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: 7A2,NA,PO4 ; X-RAY DIFFRACTION 2.25Å
e5teqA1[A:246-424] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: FLC,NA,PO4 ; X-RAY DIFFRACTION 2.3Å
e5teqB4[B:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: FLC,NA,PO4 ; X-RAY DIFFRACTION 2.3Å
e6hxqB1[B:235-410] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Citryl-CoA synthetase large subunit ; ligands: FLC ; X-RAY DIFFRACTION 2.91Å
e6hxjA1[A:228-398] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate lyase beta-subunit ; ligands: COA,FLC ; X-RAY DIFFRACTION 2.58Å
e6hxiA1[A:244-419] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Citrate lyase, subunit 1 ; ligands: COA,FLC,NA ; X-RAY DIFFRACTION 2.10Å
e6hxqD2[D:235-410] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Citryl-CoA synthetase large subunit ; X-RAY DIFFRACTION 2.91Å
e6hxiC2[C:244-419] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Citrate lyase, subunit 1 ; ligands: COA,FLC,NA ; X-RAY DIFFRACTION 2.10Å
e6hxjC1[C:228-398] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate lyase beta-subunit ; ligands: FLC,TRS ; X-RAY DIFFRACTION 2.58Å
e6hxjE1[E:228-398] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate lyase beta-subunit ; ligands: COA,FLC ; X-RAY DIFFRACTION 2.58Å
e6hxjG1[G:228-398] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate lyase beta-subunit ; ligands: COA,FLC ; X-RAY DIFFRACTION 2.58Å
e6hxhA3[A:246-485] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase,Human ATP citrate lyase ; ligands: COA,FLC,MG,PO4 ; X-RAY DIFFRACTION 3.30Å
e6hxhB3[B:246-485] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase,Human ATP citrate lyase ; ligands: COA,FLC,MG,PO4 ; X-RAY DIFFRACTION 3.30Å
e6hxhC3[C:246-485] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase,Human ATP citrate lyase ; ligands: COA,FLC,MG,PO4 ; X-RAY DIFFRACTION 3.30Å
e6hxhD3[D:246-485] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase,Human ATP citrate lyase ; ligands: COA,FLC,MG,PO4 ; X-RAY DIFFRACTION 3.30Å
e6hxhE3[E:246-485] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase,Human ATP citrate lyase ; ligands: COA,FLC,MG,PO4 ; X-RAY DIFFRACTION 3.30Å
e6hxhF3[F:246-485] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase,Human ATP citrate lyase ; ligands: COA,FLC,MG,PO4 ; X-RAY DIFFRACTION 3.30Å
e6hxhG3[G:246-485] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase,Human ATP citrate lyase ; ligands: COA,FLC,MG,PO4 ; X-RAY DIFFRACTION 3.30Å
e6hxhH3[H:246-485] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase,Human ATP citrate lyase ; ligands: COA,FLC,MG,PO4 ; X-RAY DIFFRACTION 3.30Å
e6qfbA3[A:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: 2HP ; X-RAY DIFFRACTION 3.25Å
e6qfbB3[B:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: 2HP,COA,FLC,MG ; X-RAY DIFFRACTION 3.25Å
e6qfbC3[C:246-485] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; X-RAY DIFFRACTION 3.25Å
e6qfbD3[D:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: 2HP ; X-RAY DIFFRACTION 3.25Å
e6uuwA4[A:246-431] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: QHD ; ELECTRON MICROSCOPY
e6uuwB4[B:246-431] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: QHD ; ELECTRON MICROSCOPY
e6uuwC4[C:246-431] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: QHD ; ELECTRON MICROSCOPY
e6uuwD4[D:246-431] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: QHD ; ELECTRON MICROSCOPY
e6poeA4[A:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6poeB4[B:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6poeC4[C:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6poeD4[D:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6pofA4[A:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6pofB4[B:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6pofC4[C:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6pofD4[D:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6ui9A4[A:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ACLY ; ligands: ACO,OAA ; ELECTRON MICROSCOPY
e6ui9B4[B:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ACLY ; ligands: OAA ; ELECTRON MICROSCOPY
e6ui9C4[C:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ACLY ; ligands: OAA ; ELECTRON MICROSCOPY
e6ui9D4[D:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ACLY ; ligands: ACO,OAA ; ELECTRON MICROSCOPY
e6uiaC4[C:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6uiaD4[D:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6uiaA4[A:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6uiaB4[B:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6uuzA4[A:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6uuzB4[B:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6uuzC4[C:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6uuzD4[D:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e6uv5A4[A:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP citrate lyase ; ligands: OAA ; ELECTRON MICROSCOPY
e6uv5B4[B:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP citrate lyase ; ligands: OAA ; ELECTRON MICROSCOPY
e6uv5C4[C:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP citrate lyase ; ligands: OAA ; ELECTRON MICROSCOPY
e6uv5D4[D:246-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP citrate lyase ; ligands: ACO,OAA ; ELECTRON MICROSCOPY
e6o0hA4[A:246-425,A:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: LBG ; ELECTRON MICROSCOPY
e6o0hB4[B:246-425,B:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: LBG ; ELECTRON MICROSCOPY
e6o0hC4[C:246-425,C:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: LBG ; ELECTRON MICROSCOPY
e6o0hD4[D:246-425,D:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: LBG ; ELECTRON MICROSCOPY
e7llaA4[A:246-425,A:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: OAA ; ELECTRON MICROSCOPY
e7lj9D4[D:246-425,D:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: OAA ; ELECTRON MICROSCOPY
e7llaB4[B:246-425,B:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: OAA ; ELECTRON MICROSCOPY
e7llaC4[C:246-425,C:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: OAA ; ELECTRON MICROSCOPY
e7llaD4[D:246-425,D:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: OAA ; ELECTRON MICROSCOPY
e7liwB4[B:246-431] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: COA,Y2A ; ELECTRON MICROSCOPY
e6znwA2[A:243-419] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Citrate lyase, subunit 1 ; ligands: FLC,MG,PO4 ; X-RAY DIFFRACTION 2.12Å
e8g1eA4[A:246-425,A:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e8g1eB4[B:246-425,B:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY
e8g1eC4[C:246-425,C:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY
e8g1eD4[D:246-425,D:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY
e8g1fA4[A:246-425,A:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY
e8g1fB4[B:246-425,B:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY
e8g1fC4[C:246-425,C:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY
e8g1fD4[D:246-425,D:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY
e8g5cA4[A:246-425,A:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY
e8g5dD4[D:246-425,D:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY
e7rigA4[A:246-425,A:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY
e7rigB4[B:246-425,B:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY
e7rigC4[C:246-425,C:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY
e7rigD4[D:246-425,D:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY
e7rkzA4[A:246-425,A:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: Q5B ; ELECTRON MICROSCOPY
e7rkzB4[B:246-425,B:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: Q5B ; ELECTRON MICROSCOPY
e7rkzC4[C:246-425,C:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e7rkzD4[D:246-425,D:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: Q5B ; ELECTRON MICROSCOPY
e7rmpA4[A:246-425,A:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY
e7rmpB4[B:246-425,B:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY
e7rmpC4[C:246-425,C:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ELECTRON MICROSCOPY
e7rmpD4[D:246-425,D:487-491] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ATP-citrate synthase ; ligands: PO4,Q5B ; ELECTRON MICROSCOPY

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