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:
e2pv2A1[A:172-274]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
Chaperone surA ; X-RAY DIFFRACTION 1.300Å
e1pinA2[A:45-163]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE ; ligands: 1PG,ALA,PRO,SO4 ; X-RAY DIFFRACTION 1.35Å
e1j6yA1[A:1-120] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
peptidyl-prolyl cis-trans isomerase ; SOLUTION NMR
e1nmwA1[A:50-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE NIMA-INTERACTING 1 ; ligands: SO4 ; SOLUTION NMR
e2q5aA2[A:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE NIMA-INTERACTING 1 ; ligands: 16P ; X-RAY DIFFRACTION 1.5Å
e2itkA2[A:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE NIMA-INTERACTING 1 ; ligands: PE4 ; X-RAY DIFFRACTION 1.45Å
e2xp3A2[A:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE NIMA-INTERACTING 1 ; ligands: 12P,B21 ; X-RAY DIFFRACTION 2.00Å
e3tczA2[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: PE4,R2Z ; X-RAY DIFFRACTION 2.1Å
e3tc5A1[A:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 3T5,P6G ; X-RAY DIFFRACTION 1.4Å
e2zqtA2[A:45-163] Image Pymol Jmol Links: PDB, SCOP, CATH
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 1PG,SO4 ; X-RAY DIFFRACTION 1.46Å
e2zquA2[A:45-163] Image Pymol Jmol Links: PDB, SCOP, CATH
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: SO4 ; X-RAY DIFFRACTION 2.5Å
e2zqvA2[A:45-163] Image Pymol Jmol Links: PDB, SCOP, CATH
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 1PG,SO4 ; X-RAY DIFFRACTION 2.498Å
e2zr4A2[A:45-163] Image Pymol Jmol Links: PDB, SCOP, CATH
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 1PG,SO4 ; X-RAY DIFFRACTION 1.8Å
e2zr5A2[A:45-163] Image Pymol Jmol Links: PDB, SCOP, CATH
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 1PG,SO4 ; X-RAY DIFFRACTION 2.6Å
e3ik8A1[A:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; X-RAY DIFFRACTION 1.85Å
e3ik8B1[B:54-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; X-RAY DIFFRACTION 1.85Å
e3ikdA1[A:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: J9Z ; X-RAY DIFFRACTION 2.0Å
e3ikdB1[B:54-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: J9Z ; X-RAY DIFFRACTION 2.0Å
e3ikgA1[A:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: J8Z ; X-RAY DIFFRACTION 1.86Å
e3ikgB1[B:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: J8Z ; X-RAY DIFFRACTION 1.86Å
e3kacA1[A:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 4BX ; X-RAY DIFFRACTION 1.90Å
e3kacB1[B:49-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 4BX ; X-RAY DIFFRACTION 1.90Å
e3jyjA1[A:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: JZI ; X-RAY DIFFRACTION 1.87Å
e3jyjB1[B:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: JZI ; X-RAY DIFFRACTION 1.87Å
e3i6cA1[A:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: GIA ; X-RAY DIFFRACTION 1.30Å
e3i6cB1[B:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: GIA ; X-RAY DIFFRACTION 1.30Å
e3kabA1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 12P,4BL,SO4 ; X-RAY DIFFRACTION 2.19Å
e3kadA1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 12P,4C0 ; X-RAY DIFFRACTION 1.90Å
e3kafA1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 4D9 ; X-RAY DIFFRACTION 2.30Å
e3kagA1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 12P,4D7 ; X-RAY DIFFRACTION 1.90Å
e3kahA1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 12P,4DH ; X-RAY DIFFRACTION 2.30Å
e3kaiA1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 12P,4FI ; X-RAY DIFFRACTION 1.90Å
e3kceA1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 12P,4BY ; X-RAY DIFFRACTION 1.90Å
e3odkA1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: ODK,PE4 ; X-RAY DIFFRACTION 2.30Å
e2xp4A1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE NIMA-INTERACTING 1 ; ligands: 12P,G14 ; X-RAY DIFFRACTION 1.80Å
e2xp5A1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE NIMA-INTERACTING 1 ; ligands: 12P,4FF ; X-RAY DIFFRACTION 1.90Å
e2xp6A1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE NIMA-INTERACTING 1 ; ligands: 12P,4G2 ; X-RAY DIFFRACTION 1.90Å
e2xp7A1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE NIMA-INTERACTING 1 ; ligands: 12P,4F8 ; X-RAY DIFFRACTION 2.00Å
e2xp8A1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE NIMA-INTERACTING 1 ; ligands: 12P,4FY ; X-RAY DIFFRACTION 2.10Å
e2xp9A1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE NIMA-INTERACTING 1 ; ligands: 12P,4G8 ; X-RAY DIFFRACTION 1.90Å
e2xpaA1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE NIMA-INTERACTING 1 ; ligands: 12P,4G5 ; X-RAY DIFFRACTION 1.90Å
e2xpbA1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE NIMA-INTERACTING 1 ; ligands: 12P,4GE ; X-RAY DIFFRACTION 2.00Å
e3oobA1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: KDH,PE4,SO4 ; X-RAY DIFFRACTION 1.900Å
e2lj4A1[A:4-118] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase/rotamase, putative ; SOLUTION NMR
e3tdbA2[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 3TB,PE4 ; X-RAY DIFFRACTION 2.26Å
e3ntpA1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: PE8,RZD ; X-RAY DIFFRACTION 1.76Å
e1nmvA1[A:40-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; SOLUTION NMR
e2f21A1[A:40-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 1PE ; X-RAY DIFFRACTION 1.5Å
e1f8aB1[B:44-167] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE NIMA-INTERACTING 1 ; X-RAY DIFFRACTION 1.84Å
e1yw5A3[A:63-177] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
peptidyl prolyl cis/trans isomerase ; X-RAY DIFFRACTION 1.6Å
e4tyoA1[A:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 39X,GOL ; X-RAY DIFFRACTION 1.750Å
e4tyoB1[B:49-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 39X,GOL ; X-RAY DIFFRACTION 1.750Å
e3wh0A1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: DTT,O4B,SO4 ; X-RAY DIFFRACTION 1.6Å
e2rucA1[A:1-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; SOLUTION NMR
e4tnsA1[A:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 3KV ; X-RAY DIFFRACTION 1.33Å
e4u84A2[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 15P ; X-RAY DIFFRACTION 1.78Å
e4u85A1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 15P ; X-RAY DIFFRACTION 1.7Å
e4u86A1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 1PG ; X-RAY DIFFRACTION 1.6Å
e4tnsB1[B:50-163] Image Pymol Jmol Links: PDB, SCOP, CATH
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; X-RAY DIFFRACTION 1.33Å
e2ruqA1[A:1-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; SOLUTION NMR
e2rurA1[A:1-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; SOLUTION NMR
e2zr6A2[A:40-163] Image Pymol Jmol Links: PDB, SCOP, CATH
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 1PG,SO4 ; X-RAY DIFFRACTION 3.2Å
e1zcnA1[A:40-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: 1PE,PO4 ; X-RAY DIFFRACTION 1.9Å
e5ez1A2[A:153-257] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Putative peptidyl-prolyl cis-trans isomerase HP_0175 ; ligands: ICB ; X-RAY DIFFRACTION 2.4Å
e5ez1B1[B:153-257] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Putative peptidyl-prolyl cis-trans isomerase HP_0175 ; ligands: ICB ; X-RAY DIFFRACTION 2.4Å
e5tvlA1[A:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH
Foldase protein PrsA ; ligands: CL,SO4 ; X-RAY DIFFRACTION 2.45Å
e5tvlB2[B:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH
Foldase protein PrsA ; ligands: SO4 ; X-RAY DIFFRACTION 2.45Å
e5tvlC1[C:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH
Foldase protein PrsA ; ligands: CL ; X-RAY DIFFRACTION 2.45Å
e5tvlD2[D:119-219] Image Pymol Jmol Links: PDB, SCOP, CATH
Foldase protein PrsA ; X-RAY DIFFRACTION 2.45Å
e5uy9A1[A:29-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; ligands: PE4,SO4 ; X-RAY DIFFRACTION 1.85Å
e5gphA1[A:1-117] Image Pymol Jmol Links: PDB, SCOP, CATH
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; SOLUTION NMR
e7sa5A1[A:45-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 ; SOLUTION NMR

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