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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: AAA_33

PF13671 CL0023

Representatives:

e1ly1A1[A:1-152] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

polynucleotide kinase ; ligands: SO4 ; X-RAY DIFFRACTION 2.00Å

e2ia5K1[K:1-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polynucleotide kinase ; ligands: SO4 ; X-RAY DIFFRACTION 2.9Å

e2ia5C1[C:1-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polynucleotide kinase ; ligands: SO4 ; X-RAY DIFFRACTION 2.9Å

e1ltqA1[A:1-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POLYNUCLEOTIDE KINASE ; ligands: ADP,DMS ; X-RAY DIFFRACTION 2.33Å

e2ia5E1[E:1-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polynucleotide kinase ; ligands: SO4 ; X-RAY DIFFRACTION 2.9Å

e2ia5G1[G:3-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polynucleotide kinase ; ligands: SO4 ; X-RAY DIFFRACTION 2.9Å

e2ia5A1[A:1-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polynucleotide kinase ; ligands: SO4 ; X-RAY DIFFRACTION 2.9Å

e2ia5B1[B:1-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polynucleotide kinase ; ligands: SO4 ; X-RAY DIFFRACTION 2.9Å

e2ia5H1[H:1-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polynucleotide kinase ; ligands: SO4 ; X-RAY DIFFRACTION 2.9Å

e1rc8A1[A:1-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POLYNUCLEOTIDE KINASE ; ligands: ADP,DMS ; X-RAY DIFFRACTION 2.75Å

e1rrcA1[A:1-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POLYNUCLEOTIDE KINASE ; ligands: ADP,CA,DMS ; X-RAY DIFFRACTION 2.46Å

e2ia5J1[J:1-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polynucleotide kinase ; ligands: SO4 ; X-RAY DIFFRACTION 2.9Å

e2ia5I1[I:1-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polynucleotide kinase ; ligands: SO4 ; X-RAY DIFFRACTION 2.9Å

e1rpzA1[A:1-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POLYNUCLEOTIDE KINASE ; ligands: ADP,DMS ; X-RAY DIFFRACTION 2.9Å

e2ia5F1[F:1-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polynucleotide kinase ; ligands: SO4 ; X-RAY DIFFRACTION 2.9Å

e2ia5L1[L:1-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polynucleotide kinase ; ligands: SO4 ; X-RAY DIFFRACTION 2.9Å

e2ia5D1[D:1-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polynucleotide kinase ; ligands: SO4 ; X-RAY DIFFRACTION 2.9Å

e1yj5B1[B:351-522] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

5' POLYNUCLEOTIDE KINASE-3' PHOSPHATASE CATALYTIC DOMAIN ; ligands: SO4 ; X-RAY DIFFRACTION 2.8Å

e2rhmA1[A:0-189] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative kinase ; ligands: CL ; X-RAY DIFFRACTION 1.70Å

e2rhmB1[B:0-187] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative kinase ; ligands: BEZ,CL,GOL ; X-RAY DIFFRACTION 1.70Å

e2rhmC1[C:0-189] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative kinase ; ligands: CL ; X-RAY DIFFRACTION 1.70Å

e2rhmD1[D:2-186] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative kinase ; ligands: BEZ,CL,GOL ; X-RAY DIFFRACTION 1.70Å

e4gp7B1[B:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Metallophosphoesterase ; ligands: ATP,CIT,MG,NA ; X-RAY DIFFRACTION 2.0Å

e4gp6B1[B:0-169] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Metallophosphoesterase ; ligands: ADP,MG ; X-RAY DIFFRACTION 2.1Å

e4gp7A1[A:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Metallophosphoesterase ; ligands: ATP,CIT,MG ; X-RAY DIFFRACTION 2.0Å

e4gp6A1[A:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Metallophosphoesterase ; ligands: ADP,MG ; X-RAY DIFFRACTION 2.1Å

e3zvlA1[A:340-522] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BIFUNCTIONAL POLYNUCLEOTIDE PHOSPHATASE/KINASE ; ligands: ACT,CL,GOL ; X-RAY DIFFRACTION 1.65Å

e3u7gA1[A:340-522] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bifunctional polynucleotide phosphatase/kinase ; ligands: GOL,PO4 ; X-RAY DIFFRACTION 2.100Å

e3zvmA1[A:340-522] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BIFUNCTIONAL POLYNUCLEOTIDE PHOSPHATASE/KINASE ; ligands: ADP,EPE,GOL,MG ; X-RAY DIFFRACTION 2.00Å

e3zvmB1[B:340-522] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BIFUNCTIONAL POLYNUCLEOTIDE PHOSPHATASE/KINASE ; ligands: ACT,ADP,EPE,GOL,MG ; X-RAY DIFFRACTION 2.00Å

e3u7eB1[B:340-522] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bifunctional polynucleotide phosphatase/kinase ; ligands: GOL ; X-RAY DIFFRACTION 1.700Å

e3u7fB1[B:340-522] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bifunctional polynucleotide phosphatase/kinase ; ligands: GOL,PO4 ; X-RAY DIFFRACTION 1.800Å

e3u7hB1[B:340-522] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bifunctional polynucleotide phosphatase/kinase ; ligands: GOL ; X-RAY DIFFRACTION 2.000Å

e3zvnA1[A:340-522] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BIFUNCTIONAL POLYNUCLEOTIDE PHOSPHATASE/KINASE ; ligands: ADP,GOL,MN ; X-RAY DIFFRACTION 2.15Å

e4jstA1[A:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METALLOPHOSPHOESTERASE ; ligands: MG,UTP ; X-RAY DIFFRACTION 2.03Å

e4jstB1[B:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METALLOPHOSPHOESTERASE ; ligands: MG,NA,UTP ; X-RAY DIFFRACTION 2.03Å

e4jsyA1[A:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METALLOPHOSPHOESTERASE ; ligands: GTP,MG ; X-RAY DIFFRACTION 2.14Å

e4jsyB1[B:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METALLOPHOSPHOESTERASE ; ligands: GTP,MG ; X-RAY DIFFRACTION 2.14Å

e4jt2A1[A:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METALLOPHOSPHOESTERASE ; ligands: CTP,MG ; X-RAY DIFFRACTION 2.49Å

e4jt2B1[B:0-169] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METALLOPHOSPHOESTERASE ; ligands: CTP,MG ; X-RAY DIFFRACTION 2.49Å

e4jt4A1[A:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METALLOPHOSPHOESTERASE ; ligands: DTP,MG ; X-RAY DIFFRACTION 2.01Å

e4jt4B1[B:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METALLOPHOSPHOESTERASE ; ligands: DTP,MG,NA ; X-RAY DIFFRACTION 2.01Å

e4mdeA1[A:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Metallophosphoesterase ; ligands: GDP,MG ; X-RAY DIFFRACTION 1.8Å

e4mdeB1[B:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Metallophosphoesterase ; ligands: GDP,MG ; X-RAY DIFFRACTION 1.8Å

e4mdfA1[A:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Metallophosphoesterase ; ligands: CIT,GTP,MG ; X-RAY DIFFRACTION 1.727Å

e4mdfB1[B:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Metallophosphoesterase ; ligands: GTP,MG ; X-RAY DIFFRACTION 1.727Å

e4qm7A1[A:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Metallophosphoesterase ; ligands: GTP,MG ; X-RAY DIFFRACTION 1.8Å

e4qm7B1[B:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Metallophosphoesterase ; ligands: GTP,MG ; X-RAY DIFFRACTION 1.8Å

e4qm6A1[A:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Metallophosphoesterase ; ligands: GTP,MG,NA,PO4 ; X-RAY DIFFRACTION 1.50Å

e4qm6B1[B:0-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Metallophosphoesterase ; ligands: GTP,MG,NA ; X-RAY DIFFRACTION 1.50Å

e4xrpA2[A:2-176] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pnkp1 ; ligands: PO4,SO4 ; X-RAY DIFFRACTION 3.3Å

e4xrpD1[D:2-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pnkp1 ; ligands: PO4 ; X-RAY DIFFRACTION 3.3Å

e4xruA2[A:4-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pnkp1 ; ligands: ATP ; X-RAY DIFFRACTION 3.400Å

e4xruD1[D:4-122,D:151-170] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pnkp1 ; ligands: ATP ; X-RAY DIFFRACTION 3.400Å

e2vliA1[A:5-176] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ANTIBIOTIC RESISTANCE PROTEIN ; ligands: CD,CL ; X-RAY DIFFRACTION 1.95Å

e2vliB1[B:4-176] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ANTIBIOTIC RESISTANCE PROTEIN ; ligands: CD,CL ; X-RAY DIFFRACTION 1.95Å

e3t61A1[A:0-188] Image Pymol Jmol Links: PDB, SCOP, CATH

GLUCONOKINASE ; ligands: PO4 ; X-RAY DIFFRACTION 2.2Å

e4eunA1[A:5-177] Image Pymol Jmol Links: PDB, SCOP, CATH

thermoresistant glucokinase ; ligands: SO4 ; X-RAY DIFFRACTION 1.600Å

e3t61B1[B:13-187] Image Pymol Jmol Links: PDB, SCOP, CATH

GLUCONOKINASE ; ligands: PO4 ; X-RAY DIFFRACTION 2.2Å

e1yj5A1[A:351-522] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

5' POLYNUCLEOTIDE KINASE-3' PHOSPHATASE CATALYTIC DOMAIN ; ligands: SO4 ; X-RAY DIFFRACTION 2.8Å

e1zp6A1[A:6-181] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

hypothetical protein Atu3015 ; ligands: SO4 ; X-RAY DIFFRACTION 3.2Å

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