Home Help

X - Possible homology level

H - Homology level

T - Topology level

F - Family level

* - Provisional representative


Keyword search


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: omega toxin-like
H: omega toxin-related
T: omega toxin-related
F: Squash

PF00299 CL0096

Representatives:

e1lu0A1[A:1-29] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Trypsin inhibitor I ; ligands: GOL,SO4,ZN ; X-RAY DIFFRACTION 1.03Å

e2letA1[A:1-28] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

TRYPSIN INHIBITOR II ; SOLUTION NMR

e1ha9A1[A:6-34] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR II ; SOLUTION NMR

e2it8A1[A:1-29] Image Pymol Jmol Links: PDB, SCOP, CATH

TRYPSIN INHIBITOR 2 ; SOLUTION NMR

e1w7zE1[E:1-28] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR II ; ligands: NA ; X-RAY DIFFRACTION 1.67Å

e2etiA1[A:1-28] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR II ; SOLUTION NMR

e2staI1[I:501-529] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (TRYPSIN INHIBITOR) ; X-RAY DIFFRACTION 1.8Å

e2it7A1[A:1-28] Image Pymol Jmol Links: PDB, SCOP, CATH

Trypsin inhibitor 2 ; SOLUTION NMR

e1ppeI1[I:1-29] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR CMTI-I ; X-RAY DIFFRACTION 2.0Å

e1ib9A1[A:6-34] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR II ; SOLUTION NMR

e1w7zC1[C:1-28] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR II ; ligands: NA ; X-RAY DIFFRACTION 1.67Å

e1w7zH1[H:1-28] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR II ; X-RAY DIFFRACTION 1.67Å

e1w7zA1[A:1-28] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR II ; ligands: NA ; X-RAY DIFFRACTION 1.67Å

e3ctiA1[A:1-29] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR ; SOLUTION NMR

e1h9iI1[I:1-28] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR II ; X-RAY DIFFRACTION 1.900Å

e1w7zG1[G:1-28] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR II ; ligands: FMT ; X-RAY DIFFRACTION 1.67Å

e1w7zB1[B:1-28] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR II ; ligands: FMT,NA ; X-RAY DIFFRACTION 1.67Å

e1w7zF1[F:1-28] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR II ; ligands: FMT,NA ; X-RAY DIFFRACTION 1.67Å

e2ctiA1[A:1-29] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR ; SOLUTION NMR

e1f2sI1[I:301-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR A ; X-RAY DIFFRACTION 1.79Å

e2btcI1[I:501-529] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (TRYPSIN INHIBITOR) ; X-RAY DIFFRACTION 1.5Å

e1mctI1[I:1-28] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR A ; X-RAY DIFFRACTION 1.6Å

e2stbI1[I:501-529] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (TRYPSIN INHIBITOR) ; X-RAY DIFFRACTION 1.8Å

e1ctiA1[A:1-29] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR ; SOLUTION NMR

e1lu0B1[B:1-29] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Trypsin inhibitor I ; ligands: GOL,MRD,SO4,ZN ; X-RAY DIFFRACTION 1.03Å

e1w7zD1[D:1-28] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR II ; ligands: FMT,NA ; X-RAY DIFFRACTION 1.67Å

e2v1vA1[A:1-29] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR 1 ; SOLUTION NMR

e1h9hI1[I:1-28] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRYPSIN INHIBITOR II ; X-RAY DIFFRACTION 1.500Å

e2c4bA2[A:117-143] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BARNASE MCOEETI FUSION ; ligands: 2PE,EDO,SO4,UNX ; X-RAY DIFFRACTION 1.300Å

e2c4bB2[B:117-143] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BARNASE MCOEETI FUSION ; ligands: 2PE,EDO,SO4,UNX ; X-RAY DIFFRACTION 1.300Å

e1mcvI1[I:1-28] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HEI-TOE I ; X-RAY DIFFRACTION 1.8Å

e2ljsA1[A:1-30] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Trypsin inhibitor 3 ; SOLUTION NMR

e2po8A1[A:1-34] Image Pymol Jmol Links: PDB, SCOP, CATH

MCoTI-II ; SOLUTION NMR

e2m86A1[A:1-51] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MCO-PMI ; SOLUTION NMR

e4guxD1[D:1-34] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Trypsin inhibitor 2 ; X-RAY DIFFRACTION 1.80Å

e4guxE1[E:1-34] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Trypsin inhibitor 2 ; X-RAY DIFFRACTION 1.80Å

e4guxF1[F:1-34] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Trypsin inhibitor 2 ; X-RAY DIFFRACTION 1.80Å

e2m7tA1[A:1-33] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYSTINE KNOT PROTEIN 2.5D ; SOLUTION NMR

e2mt8A1[A:1-39] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MTAbl13 of grafted MCoTI-II ; SOLUTION NMR

e2n8bA1[A:1-36] Image Pymol Jmol Links: PDB, SCOP, CATH

Cysteine knot ; SOLUTION NMR

e2n8cA1[A:1-37] Image Pymol Jmol Links: PDB, SCOP, CATH

Cysteine knot ; SOLUTION NMR

e5wovA1[A:1-34] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Two inhibitor peptide topologies 2 ; SOLUTION NMR

e5wowA1[A:1-39] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Two inhibitor peptide topologies 2 ; SOLUTION NMR

e6cdxA1[A:0-36] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

cystine knot (fluoropropylated) ; X-RAY DIFFRACTION 1Å

e6cdxB1[B:1-36] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

cystine knot (fluoropropylated) ; X-RAY DIFFRACTION 1Å

e6mm4A1[A:1-33] Image Pymol Jmol Links: PDB, SCOP, CATH

Engineered Cystine Knot Protein 2.5F ; SOLUTION NMR

e6mslC1[C:2-33] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cystine Knot Protein 2.5D ; ligands: MN ; X-RAY DIFFRACTION 3.1Å

e6msuC1[C:2-33] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Engineered EETI-II 2.5F ; ligands: CL,MN ; X-RAY DIFFRACTION 3.1Å

e7fbpB1[B:1-34] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

cMCoFx1 ; X-RAY DIFFRACTION 1.99Å

e7namB1[B:1-32] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Trypsin inhibitor 2 ; X-RAY DIFFRACTION 1.600Å

e7mlaB1[B:1-34] Image Pymol Jmol Links: PDB, SCOP, CATH

MCo-52-2 ; SOLUTION NMR

e8dvmB1[B:1-30] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

E3.6 Disulfide constrained peptide ; ligands: EDO ; X-RAY DIFFRACTION 2.0Å

e8dvnB1[B:1-32] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

E3.10 Disulfide constrained peptide ; X-RAY DIFFRACTION 2.53Å

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.

T: Cyclotides

linked to omega toxin-like with lower scores

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