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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

X: Thioredoxin-like
H: Thioredoxin-like
T: Thioredoxin-like
F: ERp29_N

PF07912 CL0172

Representatives:

e2c0gA2[A:1024-1145] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

WINDBEUTEL PROTEIN ; X-RAY DIFFRACTION 1.750Å

e1g7eA1[A:33-154] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ENDOPLASMIC RETICULUM PROTEIN ERP29 ; SOLUTION NMR

e2c0gB2[B:1024-1145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

WINDBEUTEL PROTEIN ; ligands: CL ; X-RAY DIFFRACTION 1.750Å

e2c0fA2[A:24-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

WINDBEUTEL PROTEIN ; X-RAY DIFFRACTION 2.280Å

e2c0fB2[B:24-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

WINDBEUTEL PROTEIN ; X-RAY DIFFRACTION 2.280Å

e2c0eB2[B:24-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

WINDBEUTEL PROTEIN ; X-RAY DIFFRACTION 2.350Å

e1ovnA2[A:24-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Windbeutel ; X-RAY DIFFRACTION 1.90Å

e1ovnB2[B:24-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Windbeutel ; ligands: CS ; X-RAY DIFFRACTION 1.90Å

e2c1yA2[A:24-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

WINDBEUTEL PROTEIN ; X-RAY DIFFRACTION 2.250Å

e2c0eA2[A:24-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

WINDBEUTEL PROTEIN ; X-RAY DIFFRACTION 2.350Å

e2c1yB1[B:22-149] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

WINDBEUTEL PROTEIN ; X-RAY DIFFRACTION 2.250Å

e2qc7B2[B:33-154] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ENDOPLASMIC RETICULUM PROTEIN ERP29 ; X-RAY DIFFRACTION 2.9Å

e2qc7A3[A:33-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ENDOPLASMIC RETICULUM PROTEIN ERP29 ; X-RAY DIFFRACTION 2.9Å

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.

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