Evolutionary classification of protein domain structures
alpha arraysalpha-helix arrays with mainly perpendicular helices
alpha bundlesalpha-helix bundles with mainly parallel helices
X: Four-helical up-and-down bundle
H: alpha-catenin-related
T: alpha-catenin/vinculin
F: Vinculin
Representatives:
e1qkrA1[A:881-1061]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
VINCULIN ; ligands: SO4 ; X-RAY DIFFRACTION 1.8Å
e1t01A1[A:1-125]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
unnamed protein product ; X-RAY DIFFRACTION 2.000Å
e1t01A2[A:126-252]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
unnamed protein product ; X-RAY DIFFRACTION 2.000Å
e1h6gA1[A:377-507]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
ALPHA-1 CATENIN ; ligands: CA,CL ; X-RAY DIFFRACTION 2.200Å
e1h6gA2[A:508-631]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
ALPHA-1 CATENIN ; ligands: CA,CL,MPD ; X-RAY DIFFRACTION 2.200Å
e5h5mA1[A:270-376]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
Alpha-catenin-like protein hmp-1 ; X-RAY DIFFRACTION 2.400Å
e5h5mA2[A:377-500]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
Alpha-catenin-like protein hmp-1 ; X-RAY DIFFRACTION 2.400Å
e5h5mA3[A:501-641]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
Alpha-catenin-like protein hmp-1 ; X-RAY DIFFRACTION 2.400Å
e1dovA1[A:82-262]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
ALPHA-CATENIN ; X-RAY DIFFRACTION 3.0Å
e1st6A4[A:253-371]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
Vinculin ; X-RAY DIFFRACTION 3.10Å
e1st6A6[A:489-646]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
Vinculin ; X-RAY DIFFRACTION 3.10Å
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.
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
extended segmentsextended, non-globular segments, frequently bind to other proteins to form complexes