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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

X: Spectrin repeat-like
H: S-component of energy-coupling factor (ECF) transporters
T: S-component of energy-coupling factor (ECF) transporters
F: ECF_trnsprt

PF12822 CL0315

Representatives:

e3p5nA1[A:10-188] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Riboflavin uptake protein ; ligands: RBF ; X-RAY DIFFRACTION 3.600Å

e8bmqC1[C:10-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e3p5nB1[B:10-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Riboflavin uptake protein ; ligands: RBF ; X-RAY DIFFRACTION 3.600Å

e4huqS1[S:10-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Uncharacterized protein ; X-RAY DIFFRACTION 3.00Å

e4rfsS1[S:3-200] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Substrate binding pritein S ; X-RAY DIFFRACTION 3.25Å

e4z7fA1[A:7-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Folate ECF transporter ; ligands: FOL ; X-RAY DIFFRACTION 3.1940Å

e4z7fB1[B:6-176] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Folate ECF transporter ; ligands: FOL ; X-RAY DIFFRACTION 3.1940Å

e4z7fC1[C:7-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Folate ECF transporter ; ligands: FOL ; X-RAY DIFFRACTION 3.1940Å

e4z7fD1[D:6-176] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Folate ECF transporter ; ligands: FOL ; X-RAY DIFFRACTION 3.1940Å

e4z7fE1[E:10-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Folate ECF transporter ; ligands: FOL ; X-RAY DIFFRACTION 3.1940Å

e4z7fF1[F:7-171] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Folate ECF transporter ; ligands: FOL ; X-RAY DIFFRACTION 3.1940Å

e5d0yA1[A:13-167] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Conserved hypothetical membrane protein ; ligands: FOL ; X-RAY DIFFRACTION 3Å

e5d0yB1[B:13-167] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Conserved hypothetical membrane protein ; ligands: FOL ; X-RAY DIFFRACTION 3Å

e5d3mC1[C:8-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

S-component for folate ; X-RAY DIFFRACTION 3.3Å

e5d3mG1[G:8-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

S-component for folate ; X-RAY DIFFRACTION 3.3Å

e5d7tC1[C:9-173] Image Pymol Jmol Links: PDB, SCOP, CATH

e5d7tG1[G:9-173] Image Pymol Jmol Links: PDB, SCOP, CATH

e5jszC1[C:9-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Conserved hypothetical membrane protein ; X-RAY DIFFRACTION 3Å

e5jszG1[G:9-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Conserved hypothetical membrane protein ; X-RAY DIFFRACTION 3Å

e5kbwA1[A:2-171] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Riboflavin transporter RibU ; ligands: RBF ; X-RAY DIFFRACTION 2.60Å

e5kbwB1[B:2-172] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Riboflavin transporter RibU ; ligands: RBF ; X-RAY DIFFRACTION 2.60Å

e5kc0A1[A:2-167] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Riboflavin transporter RibU ; ligands: BNG,RBF ; X-RAY DIFFRACTION 3.2Å

e5kc4A1[A:2-167] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Riboflavin transporter RibU ; ligands: BNG,RBF ; X-RAY DIFFRACTION 3.40Å

e5kc4E1[E:2-167] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Riboflavin transporter RibU ; ligands: BNG,RBF ; X-RAY DIFFRACTION 3.40Å

e6zg3C1[C:1-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Conserved hypothetical membrane protein ; ligands: CIT,LMT,PEG ; X-RAY DIFFRACTION 2.8Å

e6zg3H1[H:1-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Conserved hypothetical membrane protein ; ligands: CIT,LMT ; X-RAY DIFFRACTION 2.8Å

e7nntC1[C:10-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Folate family ECF transporter S component ; ELECTRON MICROSCOPY

e7nnuC1[C:10-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Conserved hypothetical membrane protein ; ELECTRON MICROSCOPY

e8bmpC1[C:10-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: ATP ; ELECTRON MICROSCOPY

e6fnpA1[A:7-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Membrane protein ; X-RAY DIFFRACTION 3.4Å

e6fnpE1[E:8-157] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Membrane protein ; X-RAY DIFFRACTION 3.4Å

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

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