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




Representatives:
e1rwiA1[A:11-270]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
Serine/threonine-protein kinase pknD ; ligands: CD ; X-RAY DIFFRACTION 1.8Å
e1rwiB1[B:12-270] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Serine/threonine-protein kinase pknD ; ligands: CD ; X-RAY DIFFRACTION 1.8Å
e1rwlA1[A:11-268] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SERINE/THREONINE-PROTEIN KINASE PKND ; ligands: CD ; X-RAY DIFFRACTION 1.9Å
e3ww9A1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
pizza6 protein ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 1.33Å
e3wwaA1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza7H protein ; ligands: IPA ; X-RAY DIFFRACTION 1.988Å
e6f0qA1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6-AYW ; X-RAY DIFFRACTION 1.30Å
e6f0tA1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6-SFW ; ligands: GOL ; X-RAY DIFFRACTION 1.74Å
e6f0tB1[B:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6-SFW ; X-RAY DIFFRACTION 1.74Å
e6f0tC1[C:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6-SFW ; X-RAY DIFFRACTION 1.74Å
e6f0qB1[B:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6-AYW ; X-RAY DIFFRACTION 1.30Å
e6f0sA1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6-SYW ; X-RAY DIFFRACTION 1.5Å
e6regA1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6-S ; ligands: GOL,ZN ; X-RAY DIFFRACTION 1.30Å
e6regB1[B:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6-S ; ligands: ZN ; X-RAY DIFFRACTION 1.30Å
e6rehA1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6-S ; ligands: CU,GOL,SO4 ; X-RAY DIFFRACTION 1.73Å
e6rehB1[B:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6-S ; ligands: CU,SO4 ; X-RAY DIFFRACTION 1.73Å
e6rejA1[A:2-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6-SH ; ligands: SO4,ZN ; X-RAY DIFFRACTION 1.65Å
e6rekA1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6-SH ; ligands: CU,GOL ; X-RAY DIFFRACTION 1.10Å
e6renA1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
3fPizza6-SH ; ligands: GOL,IPA,ZN ; X-RAY DIFFRACTION 1.30Å
e6renB1[B:4-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
3fPizza6-SH ; ligands: IPA,ZN ; X-RAY DIFFRACTION 1.30Å
e6i37A1[A:9-259] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
nv1Pizza6-AYW ; ligands: SO4 ; X-RAY DIFFRACTION 1.54Å
e6i38A1[A:12-262] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
nv2Pizza6-AYW ; X-RAY DIFFRACTION 1.58Å
e6i39A1[A:24-274] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
v31Pizza6-AYW ; X-RAY DIFFRACTION 1.05Å
e6i3aA1[A:33-283] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
v22Pizza6-AYW ; ligands: BR ; X-RAY DIFFRACTION 1.45Å
e6i3bA1[A:1-252] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
cPizza6-AYW ; X-RAY DIFFRACTION 1.00Å
e6i3bB1[B:1-252] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
cPizza6-AYW ; X-RAY DIFFRACTION 1.00Å
e6qseA1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6S ; ligands: TEW ; X-RAY DIFFRACTION 1.90Å
e6qsdA1[A:1-250] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6S ; ligands: SO4 ; X-RAY DIFFRACTION 1.45Å
e6qsfA1[A:3-250] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6S ; ligands: SIW ; X-RAY DIFFRACTION 1.50Å
e6qsfB1[B:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6S ; ligands: SIW ; X-RAY DIFFRACTION 1.50Å
e6qsgA1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6S ; ligands: SIW ; X-RAY DIFFRACTION 1.15Å
e6qshA1[A:3-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pizza6S ; ligands: JGH ; X-RAY DIFFRACTION 2.5Å
e6reiA1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH
Pizza6-S ; ligands: CD,CL,GOL ; X-RAY DIFFRACTION 1.50Å
e6reiB1[B:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH
Pizza6-S ; ligands: CD,CL,GOL ; X-RAY DIFFRACTION 1.50Å
e6relA1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH
Pizza6-SH ; ligands: CD,CL ; X-RAY DIFFRACTION 1.08Å
e6relB1[B:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH
Pizza6-SH ; ligands: CD,CL ; X-RAY DIFFRACTION 1.08Å
e6remA1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH
Pizza6-SH ; ligands: SO4 ; X-RAY DIFFRACTION 1.60Å
e6reoA1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH
3fPizza6-SH ; ligands: SO4 ; X-RAY DIFFRACTION 1.50Å
e6rlhA1[A:4-251] Image Pymol Jmol Links: PDB, SCOP, CATH
3fPizza6-SH ; X-RAY DIFFRACTION 1.50Å
e6rliA1[A:2-251] Image Pymol Jmol Links: PDB, SCOP, CATH
3fPizza6-SH ; X-RAY DIFFRACTION 1.15Å
e7ov7A1[A:1-250] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Pizza6-S ; ligands: CU,K,PW9 ; X-RAY DIFFRACTION 1.80Å
e7ov7B1[B:3-251] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
Pizza6-S ; ligands: CU,PW9 ; X-RAY DIFFRACTION 1.80Å
e7zcjA1[A:2-252] Image Pymol Jmol Links: PDB, SCOP, CATH
Pizza6-TNH-TSH ; ligands: SIW ; X-RAY DIFFRACTION 1.560Å
e7zphA1[A:4-251] Image Pymol Jmol Links: PDB, SCOP, CATH
Pizza6-TNK-RSH ; ligands: SIW ; X-RAY DIFFRACTION 1.660Å
e7zpwA1[A:2-252] Image Pymol Jmol Links: PDB, SCOP, CATH
Pizza6-TSK-TSH ; ligands: SIW ; X-RAY DIFFRACTION 1.800Å
e7zpwD1[D:2-252] Image Pymol Jmol Links: PDB, SCOP, CATH
Pizza6-TSK-TSH ; ligands: SIW ; X-RAY DIFFRACTION 1.800Å
e7zpzA1[A:5-254] Image Pymol Jmol Links: PDB, SCOP, CATH
Pizza6-TSR-TSH ; ligands: SIW ; X-RAY DIFFRACTION 1.570Å
e7zq2A1[A:1-251] Image Pymol Jmol Links: PDB, SCOP, CATH
Pizza6-RSH-TSH ; ligands: SIW ; X-RAY DIFFRACTION 1.600Å
e7zqgA1[A:2-251] Image Pymol Jmol Links: PDB, SCOP, CATH
Pizza6-KSH-TSH ; ligands: SIW ; X-RAY DIFFRACTION 1.800Å
e3fw0A1[A:492-820] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-glycine alpha-amidating monooxygenase ; ligands: CA,HG,HH3 ; X-RAY DIFFRACTION 2.50Å
e3fvzA2[A:492-820] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDYL-GLYCINE ALPHA-AMIDATING MONOOXYGENASE ; ligands: ACT,CA,FE,GOL,ZN ; X-RAY DIFFRACTION 2.35Å
e6gc1C2[C:219-572] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
NHL repeat-containing protein 2 ; X-RAY DIFFRACTION 2.700Å
e6g7wA1[A:219-572] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
NHL repeat-containing protein 2 ; X-RAY DIFFRACTION 1.420Å
e6gc1A1[A:219-572] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
NHL repeat-containing protein 2 ; X-RAY DIFFRACTION 2.700Å
e6gc1B1[B:219-572] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
NHL repeat-containing protein 2 ; X-RAY DIFFRACTION 2.700Å
e6gc1D2[D:219-572] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
NHL repeat-containing protein 2 ; X-RAY DIFFRACTION 2.700Å
e7djjA1[A:557-886] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Protein SUPPRESSOR OF QUENCHING 1, chloroplastic ; ligands: NA,SO4 ; X-RAY DIFFRACTION 2.69806436563Å
e7djkA1[A:563-886] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Protein SUPPRESSOR OF QUENCHING 1, chloroplastic ; ligands: CL,NA ; X-RAY DIFFRACTION 2.80Å

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