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

X: Transducin (heterotrimeric G protein), gamma chain

X: Anti-sigma factor FlgM

X: Epsilon subunit of mitochondrial F1F0-ATP synthase

X: RNA polymerase sigma-54 factor N-terminal region

X: Ezh2 N-terminal domain

X: Pre-mRNA-splicing helicase BRR2 NC-clamp

X: Alpha-crystallin B chain N-terminal domain

X: Pre-mRNA-processing factor 31 C-terminal region

X: U4/U6 small nuclear ribonucleoprotein PRP3 N-terminal region

X: Baseplate wedge protein gp7 domain VI

X: Herpes DNA polymerase N-terminal domain

X: Copper resistance protein ScsC N-terminal region

X: Cell division factor MciZ

X: Proteinase A inhibitor IA3

X: Glu-tRNAGln amidotransferase C subunit

X: RelB-like

X: Intraflagellar transport protein 46 C-terminal domain

X: Intraflagellar transport protein 52 C-terminal domain

X: Exosome complex exonuclease RRP6 N-terminal domain

X: Exosome complex protein LRP1

X: Anti sigma factor NepR-related

X: Lag-3 N-terminal region

X: Adhesin P1 N-terminal domain

X: Fe-only hydrogenase smaller subunit

X: Methanol dehydrogenase subunit

X: Moesin tail domain

X: Ribosomal protein L39e

X: Mitoribosomal protein mS26

X: Mitoribosomal protein mS31

X: Mitoribosomal protein mS33

X: Mitoribosomal protein mS38

X: Mitoribosomal protein mL42

X: Mitoribosomal protein mL52

X: Mitoribosomal protein mL63

X: C-terminal helical region in 60S ribosomal protein L4 (L4p)

X: Ribosomal protein L41-A

X: NC100

X: Stathmin

X: Clathrin light chain B

X: N-terminal domain of bifunctional PutA protein

X: Stage V sporulation protein M

X: YgaP transmembrane domain

X: Nicastrin transmembrane helix

X: Photosystem II reaction centre subunit H, transmembrane region

X: Bd-type quinol oxidase transmembrane helix subunit

X: Mitochondrial complex I, B9 subunit

X: Mitochondrial complex I, AGGG subunit

X: Mitochondrial complex I, KFYI subunit

X: Mitochondrial complex I, MNLL subunit

X: Mitochondrial complex I, MWFE subunit

X: Mitochondrial complex I, SGDH subunit

X: Mitochondrial complex I, B14.5b subunit

X: Mitochondrial complex I, B16.6 subunit

X: CAA3-type cytochrome c oxidase subunit IV

X: Mitochondrial cytochrome c oxidase subunit IV

X: Mitochondrial cytochrome c oxidase subunit VIa

X: Mitochondrial cytochrome c oxidase subunit VIc

X: Mitochondrial cytochrome c oxidase subunit VIIa

X: Mitochondrial cytochrome c oxidase subunit VIIb

X: Mitochondrial cytochrome c oxidase subunit VIIc (aka VIIIa)

X: Mitochondrial cytochrome c oxidase subunit VIIIb (aka IX)

X: Bacterial aa3 type cytochrome c oxidase subunit IV

X: Bacterial ba3 type cytochrome c oxidase subunit IIa

X: cytochrome c1 transmembrane anchor

X: iron-sulfur subunit (ISP) transmembrane anchor

X: Multidrug efflux pump accessory protein AcrZ

X: Cytochrome f subunit of the cytochrome b6f complex, transmembrane anchor

X: PetG subunit of the cytochrome b6f complex

X: PetL subunit of the cytochrome b6f complex

X: PetM subunit of the cytochrome b6f complex

X: PetN subunit of the cytochrome b6f complex

X: Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)

X: Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)

X: Subunit XI (6.4 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)

X: Subunit III of photosystem I reaction centre, PsaF

X: Subunit VIII of photosystem I reaction centre, PsaI

X: Subunit IX of photosystem I reaction centre, PsaJ

X: Subunit XII of photosystem I reaction centre, PsaM

X: Subunit PsaX of photosystem I reaction centre

X: Subunit VI of Photosystem I reaction centre

X: Subunit N of Photosystem I reaction centre

X: Iron-sulfur subunit of formate dehydrogenase N, transmembrane anchor

X: Preprotein translocase SecE subunit

X: Sec-beta subunit

X: Oligosaccharyltransferase subunit ost4p

X: Photosystem II reaction center protein L, PsbL

X: Photosystem II reaction center protein J, PsbJ

X: Photosystem II 10 kDa phosphoprotein PsbH

X: Photosystem II reaction center protein T, PsbT

X: Photosystem II reaction center protein M, PsbM

X: Photosystem II reaction center protein K, PsbK

X: Photosystem II reaction center protein I, PsbI

X: Photosystem II reaction center protein ycf12

X: Photosystem II reaction center W protein, chloroplastic

X: Photosystem II PsbX protein

X: Photosystem II protein Y, psbY

X: Chlorosome Protein A

X: Cytochrome b559 subunits

X: Cytochrome c oxidase subunit II-like, transmembrane region

X: Glycophorin-A transmembrane domain

X: NADH-quinone oxidoreductase subunit A

X: NADH-quinone oxidoreductase subunit J

X: Agnoprotein

X: Viral membrane protein P3

X: Viral membrane protein P6

X: Transmembrane protein 141

X: Transmembrane protein 14A

X: HIG1 domain family member 1A

X: Interferon alpha-inducible protein 27-like protein 1

X: Intrinsic membrane protein pufX

X: F1F0 ATP synthase subunit C

H: F1F0 ATP synthase subunit C

T: F1F0 ATP synthase subunit C

F: ATP-synt_C

PF00137

Representatives:

e1c99A1[A:1-79] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEOLIPID F1FO OF ATP SYNTHASE ; SOLUTION NMR

e7ajgP1[P:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajgQ1[Q:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajgR1[R:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajgAK1[AK:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajgAL1[AL:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajgAM1[AM:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajgAN1[AN:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajgAO1[AO:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajgAP1[AP:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajgAQ1[AQ:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajgAR1[AR:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhK1[K:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhL1[L:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhM1[M:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhN1[N:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhO1[O:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhP1[P:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhQ1[Q:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhR1[R:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhAK1[AK:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhAL1[AL:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhAM1[AM:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhAN1[AN:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhAO1[AO:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhAP1[AP:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhAQ1[AQ:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajhAR1[AR:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiK1[K:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiL1[L:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiM1[M:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiN1[N:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiO1[O:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiP1[P:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiQ1[Q:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiR1[R:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiAK1[AK:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiAL1[AL:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiAM1[AM:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiAN1[AN:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiAO1[AO:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiAP1[AP:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiAQ1[AQ:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajiAR1[AR:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjK1[K:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjL1[L:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjM1[M:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjN1[N:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjO1[O:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjP1[P:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjQ1[Q:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjR1[R:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjAK1[AK:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjAL1[AL:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjAM1[AM:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjAN1[AN:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjAO1[AO:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjAP1[AP:1-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjAQ1[AQ:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e7ajjAR1[AR:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase F(0) complex subunit C2, mitochondrial ; ELECTRON MICROSCOPY

e6tmhH1[H:96-166] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI