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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: SKICH

PF17751 CL0159

Representatives:

e3vvwA1[A:21-137] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Calcium-binding and coiled-coil domain-containing protein 2 ; X-RAY DIFFRACTION 2.5Å

e3vvvA1[A:21-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Calcium-binding and coiled-coil domain-containing protein 2 ; X-RAY DIFFRACTION 1.35Å

e4nlhB1[B:15-124] Image Pymol Jmol Links: PDB, SCOP, CATH

Tax1-binding protein 1 ; X-RAY DIFFRACTION 1.9Å

e4nlhA1[A:10-124] Image Pymol Jmol Links: PDB, SCOP, CATH

Tax1-binding protein 1 ; X-RAY DIFFRACTION 1.9Å

e5z7lB1[B:17-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Calcium-binding and coiled-coil domain-containing protein 2 ; ligands: GOL ; X-RAY DIFFRACTION 2.02Å

e5z7gA1[A:12-121] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tax1-binding protein 1 ; ligands: GOL ; X-RAY DIFFRACTION 2.30Å

e5z7aA1[A:18-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Calcium-binding and coiled-coil domain-containing protein 2 ; ligands: DTT,GOL,SO4 ; X-RAY DIFFRACTION 2.38Å

e5z7aB1[B:18-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Calcium-binding and coiled-coil domain-containing protein 2 ; ligands: DTT,GOL,SO4 ; X-RAY DIFFRACTION 2.38Å

e5z7lA1[A:18-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Calcium-binding and coiled-coil domain-containing protein 2 ; ligands: GOL ; X-RAY DIFFRACTION 2.02Å

e5z7gB1[B:13-121] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tax1-binding protein 1 ; ligands: GOL ; X-RAY DIFFRACTION 2.30Å

e7eaaB1[B:6-125] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Calcium-binding and coiled-coil domain-containing protein 2 ; X-RAY DIFFRACTION 2.60Å

e7eaaA1[A:7-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Calcium-binding and coiled-coil domain-containing protein 2 ; X-RAY DIFFRACTION 2.60Å

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