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
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




Representatives:
e2iubA1[A:286-349]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
DIVALENT CATION TRANSPORT-RELATED PROTEIN ; X-RAY DIFFRACTION 2.9Å
e8ip4A2[A:331-401] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ligands: CL,MG ; ELECTRON MICROSCOPY
e8tupA2[A:331-400] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
; ligands: MG ; ELECTRON MICROSCOPY
e2hn2B1[B:2286-2349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein corA ; X-RAY DIFFRACTION 3.700Å
e2iubE1[E:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIVALENT CATION TRANSPORT-RELATED PROTEIN ; X-RAY DIFFRACTION 2.9Å
e2iubG1[G:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIVALENT CATION TRANSPORT-RELATED PROTEIN ; X-RAY DIFFRACTION 2.9Å
e2bbjA1[A:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIVALENT CATION TRANSPORT-RELATED PROTEIN ; X-RAY DIFFRACTION 3.9Å
e2iubB1[B:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIVALENT CATION TRANSPORT-RELATED PROTEIN ; X-RAY DIFFRACTION 2.9Å
e2iubJ1[J:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIVALENT CATION TRANSPORT-RELATED PROTEIN ; X-RAY DIFFRACTION 2.9Å
e2iubC1[C:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIVALENT CATION TRANSPORT-RELATED PROTEIN ; X-RAY DIFFRACTION 2.9Å
e2bbjB1[B:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIVALENT CATION TRANSPORT-RELATED PROTEIN ; X-RAY DIFFRACTION 3.9Å
e2bbjE1[E:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIVALENT CATION TRANSPORT-RELATED PROTEIN ; X-RAY DIFFRACTION 3.9Å
e2hn2C1[C:3286-3349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein corA ; X-RAY DIFFRACTION 3.700Å
e2hn2E1[E:5286-5349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein corA ; X-RAY DIFFRACTION 3.700Å
e2iubF1[F:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIVALENT CATION TRANSPORT-RELATED PROTEIN ; X-RAY DIFFRACTION 2.9Å
e2hn2A1[A:1286-1349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein corA ; X-RAY DIFFRACTION 3.700Å
e2iubH1[H:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIVALENT CATION TRANSPORT-RELATED PROTEIN ; X-RAY DIFFRACTION 2.9Å
e2iubI1[I:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIVALENT CATION TRANSPORT-RELATED PROTEIN ; X-RAY DIFFRACTION 2.9Å
e2hn2D1[D:4286-4349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein corA ; X-RAY DIFFRACTION 3.700Å
e2bbjF1[F:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIVALENT CATION TRANSPORT-RELATED PROTEIN ; X-RAY DIFFRACTION 3.9Å
e2bbjD1[D:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIVALENT CATION TRANSPORT-RELATED PROTEIN ; X-RAY DIFFRACTION 3.9Å
e4eebB2[B:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MAGNESIUM TRANSPORT PROTEIN CORA ; X-RAY DIFFRACTION 3.8Å
e4i0uB1[B:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: LMT,MG ; X-RAY DIFFRACTION 2.7Å
e2iubD4[D:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DIVALENT CATION TRANSPORT-RELATED PROTEIN ; X-RAY DIFFRACTION 2.9Å
e4i0uF6[F:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; X-RAY DIFFRACTION 2.7Å
e4i0uA6[A:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: LMT ; X-RAY DIFFRACTION 2.7Å
e4i0uG6[G:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: PEG ; X-RAY DIFFRACTION 2.7Å
e4i0uJ6[J:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: MG ; X-RAY DIFFRACTION 2.7Å
e4i0uC6[C:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: MG ; X-RAY DIFFRACTION 2.7Å
e4i0uI6[I:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: MG ; X-RAY DIFFRACTION 2.7Å
e4i0uE6[E:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: MG,PEG,PG0 ; X-RAY DIFFRACTION 2.7Å
e4i0uD6[D:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: MG ; X-RAY DIFFRACTION 2.7Å
e4i0uH6[H:286-348] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: MG,PEG ; X-RAY DIFFRACTION 2.7Å
e4eedA8[A:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; X-RAY DIFFRACTION 3.92Å
e4eebE8[E:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MAGNESIUM TRANSPORT PROTEIN CORA ; ligands: CS ; X-RAY DIFFRACTION 3.8Å
e4eebD8[D:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MAGNESIUM TRANSPORT PROTEIN CORA ; X-RAY DIFFRACTION 3.8Å
e4eebC8[C:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MAGNESIUM TRANSPORT PROTEIN CORA ; X-RAY DIFFRACTION 3.8Å
e4eedE8[E:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: MG ; X-RAY DIFFRACTION 3.92Å
e4eebA6[A:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MAGNESIUM TRANSPORT PROTEIN CORA ; ligands: CS ; X-RAY DIFFRACTION 3.8Å
e4eedB4[B:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; X-RAY DIFFRACTION 3.92Å
e4eedD4[D:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: MG ; X-RAY DIFFRACTION 3.92Å
e4eedC4[C:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; X-RAY DIFFRACTION 3.92Å
e4ev6A5[A:252-317] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MAGNESIUM TRANSPORT PROTEIN CORA ; ligands: UMQ ; X-RAY DIFFRACTION 3.2Å
e4ev6B5[B:252-317] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MAGNESIUM TRANSPORT PROTEIN CORA ; ligands: MG,UMQ ; X-RAY DIFFRACTION 3.2Å
e4ev6C5[C:252-317] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MAGNESIUM TRANSPORT PROTEIN CORA ; ligands: MG,UMQ ; X-RAY DIFFRACTION 3.2Å
e4ev6D5[D:252-317] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MAGNESIUM TRANSPORT PROTEIN CORA ; ligands: UMQ ; X-RAY DIFFRACTION 3.2Å
e4ev6E5[E:252-317] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MAGNESIUM TRANSPORT PROTEIN CORA ; ligands: UMQ ; X-RAY DIFFRACTION 3.2Å
e4cy4A2[A:252-317] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MAGNESIUM TRANSPORT PROTEIN CORA ; ELECTRON MICROSCOPY
e4cy4B1[B:252-317] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MAGNESIUM TRANSPORT PROTEIN CORA ; ELECTRON MICROSCOPY
e4cy4C2[C:252-317] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MAGNESIUM TRANSPORT PROTEIN CORA ; ELECTRON MICROSCOPY
e4cy4D2[D:252-317] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MAGNESIUM TRANSPORT PROTEIN CORA ; ELECTRON MICROSCOPY
e4cy4E2[E:252-317] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MAGNESIUM TRANSPORT PROTEIN CORA ; ELECTRON MICROSCOPY
e3jcgA2[A:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ELECTRON MICROSCOPY
e3jcgD2[D:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ELECTRON MICROSCOPY
e3jchA2[A:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ELECTRON MICROSCOPY
e3jchD1[D:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ELECTRON MICROSCOPY
e3jcfA1[A:286-351] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: MG ; ELECTRON MICROSCOPY
e3jcfB1[B:286-351] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: MG ; ELECTRON MICROSCOPY
e3jcfC2[C:286-351] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: MG ; ELECTRON MICROSCOPY
e3jcfD2[D:286-351] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: MG ; ELECTRON MICROSCOPY
e3jcfE1[E:286-351] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ligands: MG ; ELECTRON MICROSCOPY
e3jcgB2[B:286-347] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ELECTRON MICROSCOPY
e3jcgC2[C:286-348] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ELECTRON MICROSCOPY
e3jcgE1[E:286-347] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ELECTRON MICROSCOPY
e3jchB2[B:286-347] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ELECTRON MICROSCOPY
e3jchC1[C:286-348] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ELECTRON MICROSCOPY
e3jchE2[E:286-347] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Magnesium transport protein CorA ; ELECTRON MICROSCOPY
e5jrwA1[A:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH
Cobalt/magnesium transport protein CorA ; ligands: MG ; X-RAY DIFFRACTION 3.3Å
e5jrwB2[B:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH
Cobalt/magnesium transport protein CorA ; ligands: MG ; X-RAY DIFFRACTION 3.3Å
e5jrwD2[D:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH
Cobalt/magnesium transport protein CorA ; X-RAY DIFFRACTION 3.3Å
e5jrwE1[E:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH
Cobalt/magnesium transport protein CorA ; ligands: MG ; X-RAY DIFFRACTION 3.3Å
e5jtgE1[E:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH
Cobalt/magnesium transport protein CorA ; ligands: MG ; X-RAY DIFFRACTION 3.05Å
e5jtgB2[B:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH
Cobalt/magnesium transport protein CorA ; X-RAY DIFFRACTION 3.05Å
e5jrwC1[C:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH
Cobalt/magnesium transport protein CorA ; ligands: MG ; X-RAY DIFFRACTION 3.3Å
e5jtgA2[A:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH
Cobalt/magnesium transport protein CorA ; X-RAY DIFFRACTION 3.05Å
e5jtgC2[C:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH
Cobalt/magnesium transport protein CorA ; X-RAY DIFFRACTION 3.05Å
e5jtgD1[D:286-349] Image Pymol Jmol Links: PDB, SCOP, CATH
Cobalt/magnesium transport protein CorA ; X-RAY DIFFRACTION 3.05Å
e5n9yA2[A:262-327] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Zinc transport protein ZntB ; ELECTRON MICROSCOPY
e5n9yB2[B:262-327] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Zinc transport protein ZntB ; ELECTRON MICROSCOPY
e5n9yC2[C:262-327] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Zinc transport protein ZntB ; ELECTRON MICROSCOPY
e5n9yD2[D:262-327] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Zinc transport protein ZntB ; ELECTRON MICROSCOPY
e5n9yE1[E:262-327] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Zinc transport protein ZntB ; ELECTRON MICROSCOPY
e7nh9A2[A:267-331] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CmaX protein ; ELECTRON MICROSCOPY
e7nh9B2[B:267-331] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CmaX protein ; ELECTRON MICROSCOPY
e7nh9C2[C:267-331] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CmaX protein ; ELECTRON MICROSCOPY
e7nh9D2[D:267-331] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CmaX protein ; ELECTRON MICROSCOPY
e7nh9E2[E:267-331] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CmaX protein ; ELECTRON MICROSCOPY

Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.