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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: TsaE

PF02367 CL0023

Representatives:

e1htwA1[A:1-158] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HI0065 ; ligands: ACT,ADP,MG,NA ; X-RAY DIFFRACTION 1.7Å

e1fl9B1[B:1-157] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYPOTHETICAL PROTEIN HI0065 ; ligands: HG ; X-RAY DIFFRACTION 2.5Å

e1fl9A1[A:1-157] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYPOTHETICAL PROTEIN HI0065 ; ligands: HG ; X-RAY DIFFRACTION 2.5Å

e1fl9C1[C:1-157] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYPOTHETICAL PROTEIN HI0065 ; ligands: HG ; X-RAY DIFFRACTION 2.5Å

e1htwC1[C:1-158] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HI0065 ; ligands: ADP,MG,NA ; X-RAY DIFFRACTION 1.7Å

e1htwB1[B:1-158] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HI0065 ; ligands: ADP,MG,NA ; X-RAY DIFFRACTION 1.7Å

e5mvrA1[A:-2-155] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

tRNA threonylcarbamoyladenosine biosynthesis protein TsaE ; ligands: ADP,EDO,MG ; X-RAY DIFFRACTION 1.76Å

e6fpeE1[E:1-157] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: APC,MG

e5np9A1[A:1-154] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

tRNA threonylcarbamoyladenosine biosynthesis protein TsaE ; ligands: ADP,MG ; X-RAY DIFFRACTION 2.05Å

e6fpeD1[D:1-157] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: APC,MG

e6n9aE1[E:0-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

tRNA threonylcarbamoyladenosine biosynthesis protein TsaE ; ligands: ATP,KG4,MG ; X-RAY DIFFRACTION 2.500Å

e6s84B1[B:-1-157] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATPase YjeE, predicted to have essential role in cell wall biosynthesis ; ligands: APC,LEU,MG ; X-RAY DIFFRACTION 2.890Å

e6s84E1[E:-1-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATPase YjeE, predicted to have essential role in cell wall biosynthesis ; ligands: APC,LEU,MG ; X-RAY DIFFRACTION 2.890Å

e6nakD1[D:-3-161] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TsaE ; ligands: APC,MG,TXA ; X-RAY DIFFRACTION 3.14Å

e6nakE1[E:0-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TsaE ; ligands: APC,MG,TXA ; X-RAY DIFFRACTION 3.14Å

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