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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: Four-helical up-and-down bundle
H: Histidine kinase associated sensor domains
T: Histidine kinase associated sensor domains
F: 4HB_MCP_1

PF12729 CL0457

Representatives:

e5xubA1[A:57-200] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-accepting chemotaxis sensory transducer ; ligands: CIT ; X-RAY DIFFRACTION 2.50Å

e7wrmA1[A:58-200] Image Pymol Jmol Links: PDB, SCOP, CATH

Methyl-accepting chemotaxis sensory transducer ; ligands: LMR ; X-RAY DIFFRACTION 1.80Å

e7wrmB1[B:57-198] Image Pymol Jmol Links: PDB, SCOP, CATH

Methyl-accepting chemotaxis sensory transducer ; ligands: LMR ; X-RAY DIFFRACTION 1.80Å

e8bsbB1[B:27-187] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: DLY ; X-RAY DIFFRACTION 1.9Å

e8bsaA1[A:32-189] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: DAR ; X-RAY DIFFRACTION 1.9Å

e8bsaB1[B:32-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: DAR ; X-RAY DIFFRACTION 1.9Å

e8bsbA1[A:31-189] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: DLY ; X-RAY DIFFRACTION 1.9Å

e5xuaA1[A:57-198] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-accepting chemotaxis sensory transducer ; X-RAY DIFFRACTION 2.80Å

e5xuaB1[B:57-193] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-accepting chemotaxis sensory transducer ; X-RAY DIFFRACTION 2.80Å

e5xuaC1[C:57-194] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-accepting chemotaxis sensory transducer ; X-RAY DIFFRACTION 2.80Å

e5xuaD1[D:57-193] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-accepting chemotaxis sensory transducer ; X-RAY DIFFRACTION 2.80Å

e5xuaE1[E:57-193] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-accepting chemotaxis sensory transducer ; X-RAY DIFFRACTION 2.80Å

e5xuaF1[F:58-193] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-accepting chemotaxis sensory transducer ; X-RAY DIFFRACTION 2.80Å

e5xuaG1[G:57-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-accepting chemotaxis sensory transducer ; X-RAY DIFFRACTION 2.80Å

e5xuaH1[H:57-191] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-accepting chemotaxis sensory transducer ; X-RAY DIFFRACTION 2.80Å

e5xubB1[B:57-197] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-accepting chemotaxis sensory transducer ; ligands: CIT ; X-RAY DIFFRACTION 2.50Å

e6itsA1[A:53-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-accepting chemotaxis sensory transducer ; ligands: CIT ; X-RAY DIFFRACTION 2.50Å

e6itsB1[B:54-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-accepting chemotaxis sensory transducer ; ligands: CIT ; X-RAY DIFFRACTION 2.50Å

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.

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