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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: Periplasmic binding protein-like II
H: Periplasmic binding protein-like II
T: Periplasmic binding protein-like II
F: Phosphonate-bd

PF12974 CL0177

Representatives:

e3n5lA1[A:26-112,A:228-331] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Binding protein component of ABC phosphonate transporter ; ligands: CL,EDO,SO4,UNL ; X-RAY DIFFRACTION 1.97Å

e3n5lA2[A:113-227] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Binding protein component of ABC phosphonate transporter ; ligands: EDO,SO4,UNL ; X-RAY DIFFRACTION 1.97Å

e8ed5A2[A:129-234] Image Pymol Jmol Links: PDB, SCOP, CATH

; X-RAY DIFFRACTION 1.79Å

e8ed5A1[A:41-137,A:235-301] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: GOL ; X-RAY DIFFRACTION 1.79Å

e3n5lB1[B:113-233] Image Pymol Jmol Links: PDB, SCOP, CATH

Binding protein component of ABC phosphonate transporter ; ligands: EDO,SO4,UNL ; X-RAY DIFFRACTION 1.97Å

e5jvbB2[B:101-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phosphonate ABC transporter, periplasmic phosphonate-binding protein ; ligands: 2PO ; X-RAY DIFFRACTION 1.95Å

e5jvbA1[A:101-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phosphonate ABC transporter, periplasmic phosphonate-binding protein ; ligands: 2PO ; X-RAY DIFFRACTION 1.95Å

e5lq1A2[A:101-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phosphonate ABC transporter, periplasmic phosphonate-binding protein ; ligands: GB ; X-RAY DIFFRACTION 1.41Å

e5lq5A2[A:91-203] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative phosphonate binding protein for ABC transporter ; ligands: PO3 ; X-RAY DIFFRACTION 1.46Å

e5lv1A2[A:101-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PtxB ; ligands: 78T ; X-RAY DIFFRACTION 2.12Å

e5o2kA1[A:95-200] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Probable phosphite transport system-binding protein PtxB ; X-RAY DIFFRACTION 2.1Å

e5lq1B2[B:101-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phosphonate ABC transporter, periplasmic phosphonate-binding protein ; ligands: GB ; X-RAY DIFFRACTION 1.41Å

e5lq8A2[A:91-203] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative phosphonate binding protein for ABC transporter ; ligands: GB ; X-RAY DIFFRACTION 1.52Å

e5lv1C2[C:101-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PtxB ; ligands: 78T ; X-RAY DIFFRACTION 2.12Å

e5lv1B1[B:101-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PtxB ; ligands: 78T ; X-RAY DIFFRACTION 2.12Å

e5o2jA1[A:95-200] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Probable phosphite transport system-binding protein PtxB ; ligands: 2PO ; X-RAY DIFFRACTION 1.52Å

e5o2kD1[D:95-200] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Probable phosphite transport system-binding protein PtxB ; X-RAY DIFFRACTION 2.1Å

e5o2kB2[B:95-200] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Probable phosphite transport system-binding protein PtxB ; X-RAY DIFFRACTION 2.1Å

e5o2kC2[C:95-200] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Probable phosphite transport system-binding protein PtxB ; X-RAY DIFFRACTION 2.1Å

e5o2kE2[E:95-200] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Probable phosphite transport system-binding protein PtxB ; X-RAY DIFFRACTION 2.1Å

e5o2kF1[F:95-200] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Probable phosphite transport system-binding protein PtxB ; X-RAY DIFFRACTION 2.1Å

e5o37A2[A:95-200] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Probable phosphite transport system-binding protein PtxB ; ligands: GB ; X-RAY DIFFRACTION 1.37Å

e5ub3A2[A:115-239] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phosphate-binding protein ; ligands: CL ; X-RAY DIFFRACTION 1.9Å

e5ub4A1[A:115-239] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phosphate-binding protein ; ligands: PO4 ; X-RAY DIFFRACTION 2.09Å

e5ub4B1[B:115-239] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phosphate-binding protein ; ligands: CL,PO4 ; X-RAY DIFFRACTION 2.09Å

e5ub6A1[A:115-239] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phosphate-binding protein ; ligands: POP ; X-RAY DIFFRACTION 2.2Å

e5ub6B1[B:115-239] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phosphate-binding protein ; ligands: POP ; X-RAY DIFFRACTION 2.2Å

e5ub7A1[A:115-239] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phosphate-binding protein ; ligands: ATP ; X-RAY DIFFRACTION 2.48Å

e5ub7B2[B:115-239] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phosphate-binding protein ; ligands: ATP ; X-RAY DIFFRACTION 2.48Å

e5me4A2[A:111-203] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Probable phosphite transport system-binding protein HtxB ; ligands: HP4 ; X-RAY DIFFRACTION 1.52Å

e6eskA1[A:132-237] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; X-RAY DIFFRACTION 1.75Å

e6esvA1[A:132-237] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; ligands: PO4 ; X-RAY DIFFRACTION 1.78Å

e6eu7A1[A:132-237] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; X-RAY DIFFRACTION 3.0Å

e6eu7B1[B:132-237] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; X-RAY DIFFRACTION 3.0Å

e6eu7C1[C:132-237] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; X-RAY DIFFRACTION 3.0Å

e6eu7D2[D:132-237] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; X-RAY DIFFRACTION 3.0Å

e6eu7E2[E:132-237] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; X-RAY DIFFRACTION 3.0Å

e6eu7F1[F:132-237] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; X-RAY DIFFRACTION 3.0Å

e6emnA1[A:111-203] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Probable phosphite transport system-binding protein HtxB ; ligands: 78T,EDO ; X-RAY DIFFRACTION 1.25Å

e6ghqA2[A:111-203] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Probable phosphite transport system-binding protein HtxB ; ligands: BTB,EDO,SO4 ; X-RAY DIFFRACTION 1.53Å

e6ghtA2[A:111-203] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Probable phosphite transport system-binding protein HtxB ; ligands: ACY,HP4 ; X-RAY DIFFRACTION 1.12Å

e6xabA2[A:139-244] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ArrX ; ligands: ACT ; X-RAY DIFFRACTION 1.78Å

e6xadA1[A:139-244] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ArrX ; ligands: FMT ; X-RAY DIFFRACTION 1.89Å

e6x8wA1[A:139-244] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ArrX ; ligands: SO4 ; X-RAY DIFFRACTION 1.97Å

e6x9gA2[A:139-244] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ArrX ; ligands: MLI ; X-RAY DIFFRACTION 1.68Å

e6xl2A1[A:139-244] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ArrX ; ligands: ART ; X-RAY DIFFRACTION 1.74Å

e7l22A2[A:139-244] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ArrX ; ligands: SO4 ; X-RAY DIFFRACTION 1.92Å

e6x6bA2[A:139-244] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ArrX ; ligands: PG4,SO4 ; X-RAY DIFFRACTION 1.67Å

e7s6gA2[A:101-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phosphonate ABC type transporter/ substrate binding component ; ligands: CL,EDO,PO4 ; X-RAY DIFFRACTION 1.80Å

e7zckC1[C:89-201] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phosphonate ABC type transporter/ substrate binding component ; ligands: CL,PO4 ; X-RAY DIFFRACTION 1.80Å

e6eskA2[A:41-140,A:238-304] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; ligands: GOL ; X-RAY DIFFRACTION 1.75Å

e6esvA2[A:42-140,A:238-304] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; ligands: PO4 ; X-RAY DIFFRACTION 1.78Å

e6eu7A2[A:45-140,A:238-304] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; X-RAY DIFFRACTION 3.0Å

e6eu7B2[B:44-140,B:238-304] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; X-RAY DIFFRACTION 3.0Å

e6eu7C2[C:45-140,C:238-304] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; X-RAY DIFFRACTION 3.0Å

e6eu7D1[D:48-140,D:238-304] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; X-RAY DIFFRACTION 3.0Å

e6eu7E1[E:48-140,E:238-304] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; X-RAY DIFFRACTION 3.0Å

e6eu7F2[F:48-140,F:238-304] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative periplasmic phosphite-binding-like protein (Pbl) PtxB-like protein designated AioX ; X-RAY DIFFRACTION 3.0Å

e3qk6A1[A:5-87,A:204-312] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHND, SUBUNIT OF ALKYLPHOSPHONATE ABC TRANSPORTER ; ligands: UNL ; X-RAY DIFFRACTION 2.4Å

e3qk6A2[A:88-203] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHND, SUBUNIT OF ALKYLPHOSPHONATE ABC TRANSPORTER ; ligands: UNL ; X-RAY DIFFRACTION 2.4Å

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