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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

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

X: Rubredoxin-like

binds one zinc with two CxxC motifs on two beta-hairpins

X: RING/U-box-like

binds two zincs. one in the same way as rubredoxin, probably related to rubredoxin. the other in a similar way as glucocorticoid receptor

X: Glucocorticoid receptor-like

binds zinc with one beta-hairpin and one helix, the helix binds DNA

X: EGF-like
H: EGF-related
T: TNF receptor-like
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.

Representatives:

e3wvtA2[A:98-141] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ELR1 ; X-RAY DIFFRACTION 1.5Å

e1extA2[A:72-115] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR ; ligands: SO4 ; X-RAY DIFFRACTION 1.85Å

e1extB2[B:72-115] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR ; X-RAY DIFFRACTION 1.85Å

e1ft4B2[B:72-115] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SOLUBLE TUMOR NECROSIS FACTOR RECEPTOR 1 ; X-RAY DIFFRACTION 2.9Å

e1ncfB2[B:72-115] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR ; X-RAY DIFFRACTION 2.25Å

e3urfZ6[Z:61-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY MEMBER 11B ; X-RAY DIFFRACTION 2.7Å

e1tnrR1[R:72-115] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR P55 ; X-RAY DIFFRACTION

e1ncfA1[A:72-115] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR ; X-RAY DIFFRACTION 2.25Å

e3thmF2[F:90-127] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tumor necrosis factor receptor superfamily member 6 ; X-RAY DIFFRACTION 2.100Å

e3mi8D1[D:90-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY MEMBER 6B ; X-RAY DIFFRACTION 2.95Å

e1ft4A3[A:72-115] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SOLUBLE TUMOR NECROSIS FACTOR RECEPTOR 1 ; X-RAY DIFFRACTION 2.9Å

e7kp7E2[E:72-115] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tumor necrosis factor receptor superfamily member 1A ; ligands: SO4 ; X-RAY DIFFRACTION 2.650Å

e7kp7F3[F:72-115] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tumor necrosis factor receptor superfamily member 1A ; ligands: SO4 ; X-RAY DIFFRACTION 2.650Å

e7kp8F2[F:72-115] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tumor necrosis factor receptor superfamily member 1A ; X-RAY DIFFRACTION 3.150Å

e7kpbF3[F:72-115] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tumor necrosis factor receptor superfamily member 1A ; ligands: GOL ; X-RAY DIFFRACTION 3.000Å

e7kpbE2[E:72-115] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tumor necrosis factor receptor superfamily member 1A ; X-RAY DIFFRACTION 3.000Å

e1extA3[A:116-172] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR ; ligands: MG,SO4 ; X-RAY DIFFRACTION 1.85Å

e2heyR1[R:83-142] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY MEMBER 4 ; X-RAY DIFFRACTION 2.0Å

e2heyR2[R:143-166] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY MEMBER 4 ; X-RAY DIFFRACTION 2.0Å

e2heyR3[R:29-82] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY MEMBER 4 ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å

e2uwiB3[B:123-148] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CRME PROTEIN ; X-RAY DIFFRACTION 2.00Å

e3x3fA2[A:74-114] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tumor necrosis factor receptor superfamily member 10B ; X-RAY DIFFRACTION 2.1Å

e3qo4A4[A:108-145] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY MEMBER 21 ; X-RAY DIFFRACTION 2.2Å

e4yn0A4[A:187-216] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tumor necrosis factor receptor superfamily member 21 ; X-RAY DIFFRACTION 2.2Å

e1d0gR1[R:21-61] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DEATH RECEPTOR-5 ; X-RAY DIFFRACTION 2.4Å

e1d0gR3[R:102-128] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DEATH RECEPTOR-5 ; X-RAY DIFFRACTION 2.4Å

e1sg1X1[X:2-56] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY MEMBER 16 ; X-RAY DIFFRACTION 2.4Å

e1sg1X2[X:57-95] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY MEMBER 16 ; X-RAY DIFFRACTION 2.4Å

e1sg1X4[X:138-161] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY MEMBER 16 ; X-RAY DIFFRACTION 2.4Å

e6mkzB1[B:100-155] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tumor necrosis factor receptor superfamily member 9 ; X-RAY DIFFRACTION 2.624Å

e1jmaB1[B:4-59] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HERPESVIRUS ENTRY MEDIATOR ; ligands: SO4 ; X-RAY DIFFRACTION 2.65Å

e1jmaB2[B:60-105] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HERPESVIRUS ENTRY MEDIATOR ; ligands: SO4 ; X-RAY DIFFRACTION 2.65Å

e4e4dR3[R:62-84] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tumor necrosis factor receptor superfamily member 11B ; X-RAY DIFFRACTION 2.700Å

e6cprD3[D:101-158] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tumor necrosis factor receptor superfamily member 9 ; ligands: NAG ; X-RAY DIFFRACTION 2.700Å

e3mhdD5[D:91-113] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY MEMBER 6B ; X-RAY DIFFRACTION 2.9Å

e5wi8A3[A:27-62] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tumor necrosis factor receptor superfamily member 9 ; ligands: MAN,NAG ; X-RAY DIFFRACTION 2.950Å

e3alqU3[U:159-178] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY MEMBER 1B ; X-RAY DIFFRACTION 3.0Å

e5cirE3[E:129-165] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tumor necrosis factor receptor superfamily member 10A ; X-RAY DIFFRACTION 3.000Å

e4m4rA4[A:261-293] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EPHRIN TYPE-A RECEPTOR 4 ; X-RAY DIFFRACTION 3.13Å

e5ihlA4[A:162-190] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tumor necrosis factor receptor superfamily member 5 ; ligands: SO4 ; X-RAY DIFFRACTION 3.300Å

extended segmentsextended, non-globular segments, frequently bind to other proteins to form complexes