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X - Possible homology level

H - Homology level

T - Topology level

F - Family level

* - Provisional representative


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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

X: Immunoglobulin-like beta-sandwich
H: Immunoglobulin-related
T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like
F: Ig_5

PF16681 CL0159

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

e3d85D3[D:1-87] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-12 subunit p40 ; X-RAY DIFFRACTION 1.90Å

F: Unmapped domains

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

X: Glycosyl hydrolase domain-like

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