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:
e2cl3A2[A:21-227]
* nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR 5 ; X-RAY DIFFRACTION 1.9Å
e3bapA1[A:21-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: GOL ; X-RAY DIFFRACTION 1.82Å
e3bhoA1[A:20-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: B4P ; X-RAY DIFFRACTION 1.80Å
e2j8qA1[A:22-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR 5 ; ligands: SO4 ; X-RAY DIFFRACTION 2.3Å
e2j8qB1[B:29-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR 5 ; ligands: SO4 ; X-RAY DIFFRACTION 2.3Å
e3mdgA1[A:28-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; ligands: GOL ; X-RAY DIFFRACTION 2.22Å
e3mdgB1[B:18-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; ligands: GOL ; X-RAY DIFFRACTION 2.22Å
e3mdiA1[A:29-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; ligands: GOL ; X-RAY DIFFRACTION 2.07Å
e3mdiB1[B:21-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; ligands: GOL ; X-RAY DIFFRACTION 2.07Å
e3n9uA1[A:22-227] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; ligands: GOL ; X-RAY DIFFRACTION 1.92Å
e3n9uB1[B:27-227] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; ligands: GOL ; X-RAY DIFFRACTION 1.92Å
e3p5tA1[A:34-229] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; X-RAY DIFFRACTION 2.7Å
e3p5tB1[B:34-231] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; X-RAY DIFFRACTION 2.7Å
e3p5tC1[C:34-229] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; X-RAY DIFFRACTION 2.7Å
e3p5tD1[D:34-231] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; X-RAY DIFFRACTION 2.7Å
e3p5tE1[E:34-228] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; X-RAY DIFFRACTION 2.7Å
e3p5tF1[F:34-230] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; X-RAY DIFFRACTION 2.7Å
e3p6yA1[A:34-228] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; X-RAY DIFFRACTION 2.9Å
e3p6yB1[B:34-230] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; X-RAY DIFFRACTION 2.9Å
e3p6yE1[E:34-228] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; X-RAY DIFFRACTION 2.9Å
e3p6yF1[F:34-230] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; X-RAY DIFFRACTION 2.9Å
e3p6yI1[I:34-228] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; X-RAY DIFFRACTION 2.9Å
e3p6yJ1[J:34-230] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; X-RAY DIFFRACTION 2.9Å
e3p6yM1[M:34-229] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; X-RAY DIFFRACTION 2.9Å
e3p6yN1[N:34-230] Image Pymol Jmol Links: PDB, SCOP, CATH
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 5 ; X-RAY DIFFRACTION 2.9Å
e3q2sA1[A:21-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cleavage and polyadenylation specificity factor subunit 5 ; X-RAY DIFFRACTION 2.900Å
e3q2sB1[B:21-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cleavage and polyadenylation specificity factor subunit 5 ; X-RAY DIFFRACTION 2.900Å
e3q2tA1[A:21-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cleavage and polyadenylation specificity factor subunit 5 ; X-RAY DIFFRACTION 3.060Å
e3q2tB1[B:21-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cleavage and polyadenylation specificity factor subunit 5 ; X-RAY DIFFRACTION 3.060Å
e5r64A1[A:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,M0J,ZN ; X-RAY DIFFRACTION 1.840Å
e5r64B1[B:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,ZN ; X-RAY DIFFRACTION 1.840Å
e5r65A1[A:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,K0Y,ZN ; X-RAY DIFFRACTION 2.280Å
e5r65B1[B:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,K0Y,ZN ; X-RAY DIFFRACTION 2.280Å
e5r66A1[A:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,ZN ; X-RAY DIFFRACTION 2.020Å
e5r66B1[B:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: NT7,ZN ; X-RAY DIFFRACTION 2.020Å
e5r67A1[A:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,S6V,ZN ; X-RAY DIFFRACTION 1.520Å
e5r67B1[B:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,ZN ; X-RAY DIFFRACTION 1.520Å
e5r4pA1[A:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,RVY,ZN ; X-RAY DIFFRACTION 1.780Å
e5r4pB1[B:34-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ZN ; X-RAY DIFFRACTION 1.780Å
e5r4qA1[A:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,ZN ; X-RAY DIFFRACTION 1.490Å
e5r4qB1[B:32-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: RW7,ZN ; X-RAY DIFFRACTION 1.490Å
e5r4rA1[A:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,RWA,ZN ; X-RAY DIFFRACTION 1.500Å
e5r4rB1[B:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,RWA,ZN ; X-RAY DIFFRACTION 1.500Å
e5r4sA1[A:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,RWD,ZN ; X-RAY DIFFRACTION 1.610Å
e5r4sB1[B:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,ZN ; X-RAY DIFFRACTION 1.610Å
e5r4tA1[A:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,RWG,ZN ; X-RAY DIFFRACTION 1.680Å
e5r4tB1[B:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,ZN ; X-RAY DIFFRACTION 1.680Å
e5r4uA1[A:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,RWM,ZN ; X-RAY DIFFRACTION 1.920Å
e5r4uB1[B:31-227] Image Pymol Jmol Links: PDB, SCOP, CATH
Cleavage and polyadenylation specificity factor subunit 5 ; ligands: ACT,ZN ; X-RAY DIFFRACTION 1.920Å

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