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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: Hfq

PF17209 CL0010

Representatives:

e1kq1A1[A:6-65] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Host Factor for Q beta ; ligands: ACY ; X-RAY DIFFRACTION 1.55Å

e1u1sA1[A:6-71] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HFQ PROTEIN ; X-RAY DIFFRACTION 1.6Å

e5szdB1[B:3-72] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; ligands: CL,GAI,MPD,MRD ; X-RAY DIFFRACTION 1.49Å

e5szdC1[C:2-72] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; ligands: CL,GAI,MPD,MRD ; X-RAY DIFFRACTION 1.49Å

e5szdD1[D:4-72] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; ligands: CL,GAI,MPD,MRD ; X-RAY DIFFRACTION 1.49Å

e5szdE1[E:4-72] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; ligands: CL,GAI,MPD,MRD ; X-RAY DIFFRACTION 1.49Å

e5szdF1[F:1-72] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; ligands: CL,GAI,MRD ; X-RAY DIFFRACTION 1.49Å

e5szdG1[G:2-71] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; ligands: CL,GAI,MPD,MRD,PEG ; X-RAY DIFFRACTION 1.49Å

e5szdH1[H:2-72] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; ligands: CL,GAI,MPD,MRD ; X-RAY DIFFRACTION 1.49Å

e5szdI1[I:2-72] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; ligands: CL,GAI,MPD,MRD,PEG ; X-RAY DIFFRACTION 1.49Å

e5szdJ1[J:2-72] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; ligands: CL,GAI,MPD,MRD,PEG ; X-RAY DIFFRACTION 1.49Å

e5szdK1[K:2-72] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; ligands: CL,GAI,MPD,MRD,PEG ; X-RAY DIFFRACTION 1.49Å

e5szdL1[L:2-72] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; ligands: CL,GAI,MPD,MRD,PEG ; X-RAY DIFFRACTION 1.49Å

e6gwkB1[B:6-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkA1[A:7-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkC1[C:8-76] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkD1[D:6-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkE1[E:7-73] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkF1[F:7-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkG1[G:8-73] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkH1[H:7-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkI1[I:7-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkJ1[J:6-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkK1[K:8-67] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkL1[L:7-76] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkM1[M:8-73] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkN1[N:7-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkO1[O:7-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkP1[P:6-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkQ1[Q:7-67] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkR1[R:6-76] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkS1[S:8-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkT1[T:6-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkU1[U:8-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkV1[V:6-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkW1[W:7-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e6gwkX1[X:8-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RNA-binding protein Hfq ; X-RAY DIFFRACTION 2.15Å

e4mmlA1[A:4-70] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN HFQ ; ligands: SO4,U ; X-RAY DIFFRACTION 1.8Å

Previous
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