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
Representatives:
e2dy1A2[A:378-454] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
ELONGATION FACTOR G ; X-RAY DIFFRACTION 1.6Å
e1n0uA2[A:482-560] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; ligands: SO1 ; X-RAY DIFFRACTION 2.12Å
e7lmxA1[A:0-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Integrin inhibitor ; X-RAY DIFFRACTION 1.8Å
e1zm9A2[A:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR 2 ; X-RAY DIFFRACTION 2.8Å
e2p8wT2[T:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; ELECTRON MICROSCOPY
e7lmxB1[B:1-73] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Integrin inhibitor ; X-RAY DIFFRACTION 1.8Å
e2p8zT2[T:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; ligands: SO1 ; ELECTRON MICROSCOPY
e7lmxC1[C:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Integrin inhibitor ; X-RAY DIFFRACTION 1.8Å
e3cb4E6[E:291-371] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GTP-BINDING PROTEIN LEPA ; X-RAY DIFFRACTION 2.8Å
e2p8yT2[T:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; ligands: SO1 ; ELECTRON MICROSCOPY
e1zm4E2[E:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR 2 ; X-RAY DIFFRACTION 2.9Å
e3cb4A1[A:287-367] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GTP-BINDING PROTEIN LEPA ; X-RAY DIFFRACTION 2.8Å
e1n0vD2[D:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; X-RAY DIFFRACTION 2.85Å
e3cb4B1[B:287-367] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GTP-BINDING PROTEIN LEPA ; X-RAY DIFFRACTION 2.8Å
e1zm3C2[C:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR 2 ; X-RAY DIFFRACTION 3.07Å
e3cb4C1[C:287-367] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GTP-BINDING PROTEIN LEPA ; X-RAY DIFFRACTION 2.8Å
e1zm2A2[A:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR 2 ; X-RAY DIFFRACTION 3.07Å
e3cb4F1[F:287-367] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GTP-BINDING PROTEIN LEPA ; X-RAY DIFFRACTION 2.8Å
e2p8xT2[T:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; ELECTRON MICROSCOPY
e3degC2[C:287-367] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GTP-binding protein lepA ; ELECTRON MICROSCOPY
e1zm3E2[E:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR 2 ; X-RAY DIFFRACTION 3.07Å
e5ganC4[C:596-674] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pre-mRNA-splicing factor SNU114 ; ELECTRON MICROSCOPY
e5gamC1[C:596-674] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pre-mRNA-splicing factor SNU114 ; ELECTRON MICROSCOPY
e1zm4A2[A:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR 2 ; X-RAY DIFFRACTION 2.9Å
e2npfA2[A:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; ligands: MOU ; X-RAY DIFFRACTION 2.9Å
e3jcmH4[H:590-674] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pre-mRNA-splicing factor SNU114 ; ELECTRON MICROSCOPY
e1u2rA2[A:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR 2 ; ligands: SO1 ; X-RAY DIFFRACTION 2.6Å
e5gm6C3[C:588-676] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pre-mRNA-splicing factor SNU114 ; ELECTRON MICROSCOPY
e5lj5C5[C:594-693] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pre-mRNA-splicing factor SNU114 ; ELECTRON MICROSCOPY
e1zm2E2[E:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR 2 ; X-RAY DIFFRACTION 3.07Å
e1zm2C2[C:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR 2 ; X-RAY DIFFRACTION 3.07Å
e5wsgC3[C:588-674] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pre-mRNA-splicing factor SNU114 ; ELECTRON MICROSCOPY
e2npfB2[B:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; ligands: MOU ; X-RAY DIFFRACTION 2.9Å
e5nrlC3[C:594-693] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pre-mRNA-splicing factor SNU114 ; ELECTRON MICROSCOPY
e1zm9E2[E:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR 2 ; X-RAY DIFFRACTION 2.8Å
e5mpsC1[C:594-693] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pre-mRNA-splicing factor SNU114 ; ELECTRON MICROSCOPY
e5mq0C3[C:594-693] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pre-mRNA-splicing factor SNU114 ; ELECTRON MICROSCOPY
e1zm4C2[C:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR 2 ; X-RAY DIFFRACTION 2.9Å
e3cb4D1[D:287-367] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GTP-BINDING PROTEIN LEPA ; X-RAY DIFFRACTION 2.8Å
e1zm9C2[C:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR 2 ; X-RAY DIFFRACTION 2.8Å
e2e1rA2[A:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; ligands: SOD ; X-RAY DIFFRACTION 3.15Å
e1zm3A2[A:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR 2 ; X-RAY DIFFRACTION 3.07Å
e1n0vC2[C:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; X-RAY DIFFRACTION 2.85Å
e3j3az4[z:498-576] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e2yweA3[A:291-373] Image Pymol Jmol Links: PDB, SCOP, CATH
GTP-binding protein lepA ; X-RAY DIFFRACTION 2.05Å
e2ywgA3[A:291-373] Image Pymol Jmol Links: PDB, SCOP, CATH
GTP-binding protein LepA ; X-RAY DIFFRACTION 2.94Å
e2ywhA3[A:291-373] Image Pymol Jmol Links: PDB, SCOP, CATH
GTP-binding protein LepA ; X-RAY DIFFRACTION 2.24Å
e3j38z8[z:466-544] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e3b78C14[C:464-542] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; X-RAY DIFFRACTION 2.500Å
e3b8hA14[A:464-542] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; X-RAY DIFFRACTION 2.500Å
e3b82A14[A:464-542] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; X-RAY DIFFRACTION 2.350Å
e3b82C14[C:464-542] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; X-RAY DIFFRACTION 2.350Å
e2zitA14[A:464-542] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; X-RAY DIFFRACTION 3.000Å
e1s1hT9[T:464-542] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e3b82E14[E:464-542] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; X-RAY DIFFRACTION 2.350Å
e3b8hC14[C:464-542] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; X-RAY DIFFRACTION 2.500Å
e3b8hE14[E:464-542] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; X-RAY DIFFRACTION 2.500Å
e2zitC14[C:464-542] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; X-RAY DIFFRACTION 3.000Å
e2zitE14[E:464-542] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; X-RAY DIFFRACTION 3.000Å
e1vx441[4:498-576] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e4w2241[4:498-576] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e4qjty4[y:293-373] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e4w2ey1[y:293-373] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
50S ribosomal protein L9, Elongation factor 4 ; X-RAY DIFFRACTION 2.890Å
e3j7p41[4:498-576] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Eukaryotic elongation factor 2 ; ELECTRON MICROSCOPY
e4v4bAT1[AT:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; ELECTRON MICROSCOPY
e4v6wAz5[Az:466-544] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; ELECTRON MICROSCOPY
e4v6xAz1[Az:498-576] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 2 ; ELECTRON MICROSCOPY
e3jb9B2[B:595-673] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Pre-mRNA-splicing factor cwf10 ; ELECTRON MICROSCOPY
e3jcrB2[B:581-659] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
hSnu114 ; ELECTRON MICROSCOPY
e5it713[1:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Eft2p ; ELECTRON MICROSCOPY
e5imqB3[B:293-373] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 4 ; ELECTRON MICROSCOPY
e5imrC4[C:293-373] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Elongation factor 4 ; ELECTRON MICROSCOPY
e5j8bz4[z:293-373] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GDPCP fused to the N-terminus of the ribosomal protein L9,Elongation factor 4 ; X-RAY DIFFRACTION 2.590Å
e5juoDC4[DC:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
yeast eEF2 ; ligands: SO1 ; ELECTRON MICROSCOPY
e5jupDC2[DC:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
yeast eEF2 ; ligands: SO1 ; ELECTRON MICROSCOPY
e5jusDC4[DC:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
yeast eEF2 ; ligands: SO1 ; ELECTRON MICROSCOPY
e5jutDC4[DC:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
yeast eEF2 ; ligands: SO1 ; ELECTRON MICROSCOPY
e5juuDC3[DC:482-560] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
yeast eEF2 ; ligands: SO1 ; ELECTRON MICROSCOPY
e5o9zB1[B:581-659] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
116 kDa U5 small nuclear ribonucleoprotein component ; ELECTRON MICROSCOPY
e2ywfA3[A:293-373] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
GTP-binding protein lepA ; X-RAY DIFFRACTION 2.24Å
e2bv3A2[A:404-415,A:435-478] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR G ; X-RAY DIFFRACTION 2.500Å
e1fnmA2[A:404-482] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR G ; X-RAY DIFFRACTION 2.8Å
e3zztA5[A:404-481] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ELONGATION FACTOR G ; X-RAY DIFFRACTION 2.95Å
Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
looks like an elaborated ferredoxin
contains a HTH motif
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