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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

X: CheC-like
H: CheC-like
T: CheC-like
F: FliM

PF02154 CL0355

Representatives:

e3sohA1[A:46-233] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein FliM ; X-RAY DIFFRACTION 3.5Å

e4fhrA1[A:45-230] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FLAGELLAR MOTOR SWITCH PROTEIN FLIM ; X-RAY DIFFRACTION 1.93Å

e2hp7A1[A:44-226] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein FliM ; X-RAY DIFFRACTION 2.000Å

e4gc8A1[A:47-230] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein ; X-RAY DIFFRACTION 2.2Å

e3sohC1[C:46-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein FliM ; X-RAY DIFFRACTION 3.5Å

e4fq0A1[A:28-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein ; X-RAY DIFFRACTION 2.8Å

e4fq0B1[B:28-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein ; X-RAY DIFFRACTION 2.8Å

e4gc8C2[C:48-230] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein ; X-RAY DIFFRACTION 2.2Å

e4gc8B3[B:48-230] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein ; X-RAY DIFFRACTION 2.2Å

e4qrmA1[A:46-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein FliM ; X-RAY DIFFRACTION 4.3Å

e4qrmC1[C:46-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein FliM ; X-RAY DIFFRACTION 4.3Å

e4qrmE1[E:46-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein FliM ; X-RAY DIFFRACTION 4.3Å

e4qrmG1[G:46-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein FliM ; X-RAY DIFFRACTION 4.3Å

e4qrmI1[I:46-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein FliM ; X-RAY DIFFRACTION 4.3Å

e4qrmK1[K:46-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein FliM ; X-RAY DIFFRACTION 4.3Å

e4qrmM1[M:46-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein FliM ; X-RAY DIFFRACTION 4.3Å

e4qrmO1[O:46-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein FliM ; X-RAY DIFFRACTION 4.3Å

e4qrmQ1[Q:46-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein FliM ; X-RAY DIFFRACTION 4.3Å

e4qrmS1[S:46-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein FliM ; X-RAY DIFFRACTION 4.3Å

e4qrmU1[U:46-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein FliM ; X-RAY DIFFRACTION 4.3Å

e5x0zE1[E:47-237] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein (FliM) ; X-RAY DIFFRACTION 2.700Å

e5x0zF1[F:48-230] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein (FliM) ; X-RAY DIFFRACTION 2.700Å

e7dm9A1[A:51-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Flagellar motor switch protein FliM ; X-RAY DIFFRACTION 1.71Å

X: MinE-like

both are dimers, but slightly different dimerization mode

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