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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

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

X: P-loop domains-like
H: P-loop domains-related
T: P-loop containing nucleoside triphosphate hydrolases
F: GTP_EFTU

PF00009 CL0023

Representatives:

e2c78A3[A:9-212] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ELONGATION FACTOR TU-A ; ligands: GNP,MG,PUL ; X-RAY DIFFRACTION 1.400Å

e5h7kA1[A:6-276] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Elongation factor 2 ; ligands: GDP ; X-RAY DIFFRACTION 1.599Å

e2dy1A5[A:8-274] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

ELONGATION FACTOR G ; ligands: GTP,MG ; X-RAY DIFFRACTION 1.6Å

e1f60A3[A:2-240] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ELONGATION FACTOR EEF1A ; X-RAY DIFFRACTION 1.67Å

e1kk1A4[A:6-55,A:84-200] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

eIF2gamma ; ligands: GNP,MG ; X-RAY DIFFRACTION 1.8Å

e1g7sA3[A:1-227] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSLATION INITIATION FACTOR IF2/EIF5B ; ligands: GDP ; X-RAY DIFFRACTION 2Å

e1n0uA5[A:3-343] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Elongation factor 2 ; X-RAY DIFFRACTION 2.12Å

e2ywfA1[A:1-186] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

GTP-binding protein lepA ; ligands: GNP,MG ; X-RAY DIFFRACTION 2.24Å

e2bv3A5[A:7-41,A:61-282] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ELONGATION FACTOR G ; ligands: GNP,MG ; X-RAY DIFFRACTION 2.500Å

e5j8bz1[z:6-189] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

GDPCP fused to the N-terminus of the ribosomal protein L9,Elongation factor 4 ; ligands: GCP,MG ; X-RAY DIFFRACTION 2.590Å

e1zunB3[B:16-237] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SULFATE ADENYLATE TRANSFERASE, SUBUNIT 1/ADENYLYLSULFATE KINASE ; ligands: GDP ; X-RAY DIFFRACTION 2.7Å

e5izlA1[A:2-216] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Selenocysteine-specific elongation factor ; ligands: GCP,MG ; X-RAY DIFFRACTION 2.72Å

e4kjzC2[C:68-243] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSLATION INITIATION FACTOR IF-2 ; ligands: GDP ; X-RAY DIFFRACTION 2.8Å

e3zztA4[A:1-282] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ELONGATION FACTOR G ; X-RAY DIFFRACTION 2.95Å

e4ac9C1[C:1-179] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MJ0495-LIKE PROTEIN ; ligands: DXC,GDP,MG,SO4 ; X-RAY DIFFRACTION 3.03Å

e4zu9A1[A:1-172] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Elongation factor SelB ; ligands: CYS,GNP,MG ; X-RAY DIFFRACTION 3.19Å

e3izq11[1:161-390] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Elongation factor 1 alpha-like protein ; ELECTRON MICROSCOPY

e3jcex1[x:5-184] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Elongation factor 4 ; ligands: GNP,MG ; ELECTRON MICROSCOPY

e4upyB1[B:808-1066] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

; ligands: GNP,MG

e5anbK1[K:1-364] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ELONGATION FACTOR TU GTP-BINDING DOMAIN-CONTAINING PROTEIN 1 ; 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.

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