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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: MG2

PF01835 CL0159

Representatives:

e4u48A4[A:371-476] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative inner membrane lipoprotein ; X-RAY DIFFRACTION 2.950Å

e4a5wA2[A:122-222] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COMPLEMENT C5 ; X-RAY DIFFRACTION 3.50Å

e4acqA9[A:125-224] Image Pymol Jmol Links: PDB, SCOP, CATH

e4acqB6[B:125-224] Image Pymol Jmol Links: PDB, SCOP, CATH

e4acqD6[D:125-224] Image Pymol Jmol Links: PDB, SCOP, CATH

e3cu7A9[A:122-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Complement C5 ; X-RAY DIFFRACTION 3.1Å

e3cu7B17[B:122-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Complement C5 ; X-RAY DIFFRACTION 3.1Å

e3klsA9[A:122-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Complement C5 ; X-RAY DIFFRACTION 3.6Å

e3klsB17[B:122-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Complement C5 ; X-RAY DIFFRACTION 3.6Å

e3km9A17[A:122-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Complement C5 ; X-RAY DIFFRACTION 4.2Å

e3km9B17[B:122-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Complement C5 ; X-RAY DIFFRACTION 4.2Å

e3prxA9[A:122-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COMPLEMENT C5 ; X-RAY DIFFRACTION 4.3Å

e3prxC9[C:122-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COMPLEMENT C5 ; X-RAY DIFFRACTION 4.3Å

e4acqC3[C:125-224] Image Pymol Jmol Links: PDB, SCOP, CATH

e4d94A4[A:120-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioester-containing protein 1 ; ligands: NAG ; X-RAY DIFFRACTION 2.700Å

e4lnvA5[A:120-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioester-containing protein I ; ligands: NAG ; X-RAY DIFFRACTION 3.700Å

e4lnvC5[C:120-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioester-containing protein I ; ligands: NAG ; X-RAY DIFFRACTION 3.700Å

e2pn5A4[A:99-198] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioester-containing protein I ; ligands: NAG ; X-RAY DIFFRACTION 2.698Å

e4lnvB5[B:120-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioester-containing protein I ; X-RAY DIFFRACTION 3.700Å

e3pvmB2[B:125-218] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COBRA VENOM FACTOR ; ligands: NAG ; X-RAY DIFFRACTION 4.3Å

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