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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

X: cradle loop barrel

Refs: Structure 14, 1489-1498; Current opinion in structural biology 18, 358-365

X: SH3
H: SH3
T: SH3
F: IF5A-like_N

PF21485 CL0010

Representatives:

e1x6oA2[A:19-86] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

eukaryotic initiation factor 5a ; ligands: PEG ; X-RAY DIFFRACTION 1.6Å

e1khiA2[A:27-102] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hex1 ; X-RAY DIFFRACTION 1.78Å

e1iz6A2[A:2-70] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INITIATION FACTOR 5A ; X-RAY DIFFRACTION 2.0Å

e3hksA6[A:16-80] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EUKARYOTIC TRANSLATION INITIATION FACTOR 5A-2 ; ligands: EDO ; X-RAY DIFFRACTION 2.3Å

e3hksB4[B:16-80] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EUKARYOTIC TRANSLATION INITIATION FACTOR 5A-2 ; X-RAY DIFFRACTION 2.3Å

e3cpfA3[A:15-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A-1 ; X-RAY DIFFRACTION 2.500Å

e3cpfB3[B:15-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A-1 ; X-RAY DIFFRACTION 2.500Å

e1bkbA2[A:7-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSLATION INITIATION FACTOR 5A ; X-RAY DIFFRACTION 1.75Å

e1eifA2[A:5-73] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EUKARYOTIC TRANSLATION INITIATION FACTOR 5A ; X-RAY DIFFRACTION 1.9Å

e2eifA2[A:5-73] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (EUKARYOTIC TRANSLATION INITIATION FACTOR 5A) ; X-RAY DIFFRACTION 1.8Å

e1xtdA2[A:27-94] Image Pymol Jmol Links: PDB, SCOP, CATH

EUKARYOTIC INITIATION FACTOR 5A ; X-RAY DIFFRACTION 2.7Å

e1iz6B2[B:2-70] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INITIATION FACTOR 5A ; X-RAY DIFFRACTION 2.0Å

e1iz6C2[C:2-70] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INITIATION FACTOR 5A ; X-RAY DIFFRACTION 2.0Å

e3er0A4[A:12-80] Image Pymol Jmol Links: PDB, SCOP, CATH

EUKARYOTIC TRANSLATION INITIATION FACTOR 5A-2 ; X-RAY DIFFRACTION 3.35Å

e3er0B3[B:17-84] Image Pymol Jmol Links: PDB, SCOP, CATH

EUKARYOTIC TRANSLATION INITIATION FACTOR 5A-2 ; X-RAY DIFFRACTION 3.35Å

e5hy6A2[A:16-84] Image Pymol Jmol Links: PDB, SCOP, CATH

Eukaryotic translation initiation factor 5A ; X-RAY DIFFRACTION 2.186Å

e5dc3f1[f:10-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A-1 ; X-RAY DIFFRACTION 3.250Å

e5dlqF1[F:15-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A-1 ; X-RAY DIFFRACTION 3.000Å

e5dlqE2[E:16-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A-1 ; X-RAY DIFFRACTION 3.000Å

e5datf1[f:10-84] Image Pymol Jmol Links: PDB, SCOP, CATH

Eukaryotic translation initiation factor 5A-1 ; ligands: MG ; X-RAY DIFFRACTION 3.15Å

e5dgff2[f:10-84] Image Pymol Jmol Links: PDB, SCOP, CATH

Eukaryotic translation initiation factor 5A-1 ; ligands: MG ; X-RAY DIFFRACTION 3.300Å

e5dgef1[f:10-84] Image Pymol Jmol Links: PDB, SCOP, CATH

Eukaryotic translation initiation factor 5A-1 ; X-RAY DIFFRACTION 3.450Å

e6q84C2[C:17-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A-1 ; X-RAY DIFFRACTION 3.7Å

e6q84F2[F:18-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A-1 ; X-RAY DIFFRACTION 3.7Å

e6tnueI2[eI:4-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A-1 ; ELECTRON MICROSCOPY

e7nrcLs2[Ls:4-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

eiF5A ; ELECTRON MICROSCOPY

e7n4dA2[A:16-84] Image Pymol Jmol Links: PDB, SCOP, CATH

Eukaryotic translation initiation factor 5A ; X-RAY DIFFRACTION 2.450Å

e7n4dB1[B:16-84] Image Pymol Jmol Links: PDB, SCOP, CATH

Eukaryotic translation initiation factor 5A ; X-RAY DIFFRACTION 2.450Å

e7n4dC1[C:16-84] Image Pymol Jmol Links: PDB, SCOP, CATH

Eukaryotic translation initiation factor 5A ; X-RAY DIFFRACTION 2.450Å

e7n4dD2[D:16-84] Image Pymol Jmol Links: PDB, SCOP, CATH

Eukaryotic translation initiation factor 5A ; X-RAY DIFFRACTION 2.450Å

e7rr551[5:4-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A ; ligands: ASP,MG ; ELECTRON MICROSCOPY

e7oya112[11:10-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A ; ELECTRON MICROSCOPY

e7oyc112[11:10-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A ; ELECTRON MICROSCOPY

e7oydt2[t:10-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A-1 ; ELECTRON MICROSCOPY

e8aafv1[v:16-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A-1 ; ELECTRON MICROSCOPY

e8agtv2[v:16-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A-1 ; ELECTRON MICROSCOPY

e8aguv1[v:16-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A-1 ; ELECTRON MICROSCOPY

e8agvv1[v:16-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A-1 ; ELECTRON MICROSCOPY

e8agxv2[v:16-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A-1 ; ELECTRON MICROSCOPY

e8agzv1[v:16-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A-1 ; ELECTRON MICROSCOPY

e8a0eE2[E:15-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 5A ; ELECTRON MICROSCOPY

e8g5y5A2[5A:16-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

eIF5A1 ; ligands: MET,MG ; ELECTRON MICROSCOPY

e8g5z5A1[5A:11-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

eIF5A1 ; ELECTRON MICROSCOPY

e8g615A2[5A:4-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

eIF5A1 ; ligands: MET,MG ; ELECTRON MICROSCOPY

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.

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