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
Representatives:
e1xiwA1[A:12-102] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
T-cell surface glycoprotein CD3 epsilon chain ; X-RAY DIFFRACTION 1.9Å
e8d7eC1[C:24-94] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ciliary neurotrophic factor receptor subunit alpha ; ELECTRON MICROSCOPY
e3r08E1[E:1-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
T-CELL SURFACE GLYCOPROTEIN CD3 EPSILON CHAIN ; X-RAY DIFFRACTION 4.1Å
e8d7hC3[C:24-94] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ciliary neurotrophic factor receptor subunit alpha ; ELECTRON MICROSCOPY
e1jbjA4[A:1-89] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CD3 Epsilon and gamma Ectodomain Fragment Complex ; SOLUTION NMR
e2mimA6[A:1-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CD3 epsilon protein,CD3 glycoprotein ; SOLUTION NMR
e8d7hG2[G:24-94] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ciliary neurotrophic factor receptor subunit alpha ; ELECTRON MICROSCOPY
e1xmwA1[A:1-91] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Chimeric CD3 mouse Epsilon and sheep Delta Ectodomain Fragment Complex ; SOLUTION NMR
e1xiwE1[E:12-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
T-cell surface glycoprotein CD3 epsilon chain ; X-RAY DIFFRACTION 1.9Å
e1sy6A2[A:118-203] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
T-cell surface glycoprotein CD3 gamma/epsilon chain ; X-RAY DIFFRACTION 2.1Å
e1f42A3[A:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
INTERLEUKIN-12 BETA CHAIN ; X-RAY DIFFRACTION 2.5Å
e1f45A3[A:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
INTERLEUKIN-12 BETA CHAIN ; X-RAY DIFFRACTION 2.8Å
e3d87B3[B:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit p40 ; X-RAY DIFFRACTION 2.90Å
e3d87D3[D:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit p40 ; X-RAY DIFFRACTION 2.90Å
e3duhA3[A:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
INTERLEUKIN-12 SUBUNIT BETA ; ligands: NAG ; X-RAY DIFFRACTION 2.3Å
e3duhB3[B:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
INTERLEUKIN-12 SUBUNIT BETA ; ligands: NAG ; X-RAY DIFFRACTION 2.3Å
e3hmxA3[A:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; X-RAY DIFFRACTION 3.000Å
e3qwrA3[A:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; X-RAY DIFFRACTION 3.250Å
e4grwB8[B:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; X-RAY DIFFRACTION 2.540Å
e4grwD2[D:1-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; X-RAY DIFFRACTION 2.540Å
e4oe8A1[A:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH
; ligands: PG4
e4og9A1[A:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH
e5mj3A2[A:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; ligands: BMA,NAG,PG4,PGE ; X-RAY DIFFRACTION 1.74Å
e5mj4A2[A:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; ligands: BMA,MAN,NAG ; X-RAY DIFFRACTION 3.4Å
e5mxaA3[A:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; ligands: BMA,MAN,NAG ; X-RAY DIFFRACTION 2.5Å
e5njdA1[A:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; ligands: NAG ; X-RAY DIFFRACTION 3.9Å
e5mzvA2[A:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; ligands: BMA,MAN,NA,NAG ; X-RAY DIFFRACTION 2.8Å
e5njdC2[C:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; ligands: NAG,SO4 ; X-RAY DIFFRACTION 3.9Å
e5njdE3[E:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; ligands: NAG ; X-RAY DIFFRACTION 3.9Å
e5njdG1[G:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; ligands: NAG ; X-RAY DIFFRACTION 3.9Å
e5njdI2[I:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; ligands: NAG,SO4 ; X-RAY DIFFRACTION 3.9Å
e5njdK3[K:23-109] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; ligands: NAG,SO4 ; X-RAY DIFFRACTION 3.9Å
e6jxrf1[f:33-124] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
e6jxre1[e:33-124] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
e6uibB1[B:0-87] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; X-RAY DIFFRACTION 2.740Å
e6wdqA1[A:21-109] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Interleukin-12 subunit beta ; ligands: NAG ; X-RAY DIFFRACTION 3.40Å
e7fjde1[e:33-124] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
e7fjdf1[f:33-124] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
e7fjee1[e:33-124] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
e7fjef1[f:33-124] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
e7fjfe1[e:33-124] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
e7fjff1[f:33-124] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
e7phrE1[E:11-102] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
e7phre1[e:11-102] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
e8es7F1[F:33-124] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
e8es7E1[E:33-124] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
e8es8F1[F:33-124] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
e8es8E1[E:33-124] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
e8es9F1[F:33-124] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
e8es9E1[E:33-124] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
T-cell surface glycoprotein CD3 epsilon chain ; ELECTRON MICROSCOPY
Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
some similarity with Ig fold
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
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