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
X: Phage tail fiber protein trimerization domain
H: Phage tail fiber protein trimerization domain
T: Phage tail fiber protein trimerization domain
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:
e5jsdA2[A:395-454]
nonrep
Image
Pymol
Jmol Links:
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phiAB6 tailspike ; ligands: MLA ; X-RAY DIFFRACTION 1.480Å
e3witA1[A:561-641]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
Putative Vgr protein ; X-RAY DIFFRACTION 1.95Å
e2bsdA4[A:129-149]
* nonrep
Image
Pymol
Jmol Links:
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RECEPTOR BINDING PROTEIN ; X-RAY DIFFRACTION 2.300Å
e6orjA2[A:136-298]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH
PHIKZ164 ; ligands: CL,NA ; X-RAY DIFFRACTION 2.37Å
Domain assembly:
e4uw8A2[A:989-1264]
nonrep
Image
Pymol
Jmol Links:
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CATH, PubMed,
DOI
L-SHAPED TAIL FIBER PROTEIN , X-RAY DIFFRACTION 2.52Å
e4uw8B2[B:989-1264] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
L-SHAPED TAIL FIBER PROTEIN , X-RAY DIFFRACTION 2.52Å
e4uw8C2[C:989-1264] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
L-SHAPED TAIL FIBER PROTEIN , X-RAY DIFFRACTION 2.52Å
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