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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

X: beta-propeller-like
H: beta-propeller
T: 7-bladed
F: WD40

PF00400 CL0186

Representatives:

e1yfqA1[A:1-342] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cell cycle arrest protein BUB3 ; ligands: ACT,CA ; X-RAY DIFFRACTION 1.1Å

e5igoC1[C:352-675] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

E3 ubiquitin-protein ligase COP1 ; X-RAY DIFFRACTION 1.597Å

e1gxrA1[A:434-770] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSDUCIN-LIKE ENHANCER PROTEIN 1 ; ligands: CA ; X-RAY DIFFRACTION 1.600Å

e1nr0A1[A:2-312] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Actin interacting protein 1 ; ligands: MN ; X-RAY DIFFRACTION 1.70Å

e1nr0A2[A:313-611] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Actin interacting protein 1 ; X-RAY DIFFRACTION 1.70Å

e5n4aA1[A:1-298] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Intraflagellar transport protein 80 ; ligands: GOL ; X-RAY DIFFRACTION 1.79Å

e1sq9A1[A:3-395] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Antiviral protein SKI8 ; ligands: SO4 ; X-RAY DIFFRACTION 1.9Å

e1k8kC1[C:2-372] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ARP2/3 COMPLEX 41 KDA SUBUNIT ; X-RAY DIFFRACTION 2.0Å

e4nsxA2[A:350-684] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

U3 small nucleolar RNA-associated protein 21 ; X-RAY DIFFRACTION 2.10Å

e5n1aB1[B:2-367] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

utp4 ; X-RAY DIFFRACTION 2.15Å

e6b3xA1[A:78-427] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cleavage stimulation factor subunit 1 ; X-RAY DIFFRACTION 2.3Å

e1erjA1[A:283-710] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTIONAL REPRESSOR TUP1 ; X-RAY DIFFRACTION 2.30Å

e1pguA2[A:327-613] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Actin interacting protein 1 ; ligands: ZN ; X-RAY DIFFRACTION 2.30Å

e3mkqA1[A:2-303] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer beta'-subunit ; X-RAY DIFFRACTION 2.5Å

e7mqaLO1[LO:2-227,LO:271-371] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Periodic tryptophan protein 2 homolog ; ELECTRON MICROSCOPY

e4x3eA1[A:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 2.0Å

e4x61B1[B:24-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.850Å

e5emjB1[B:26-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ligands: GOL ; X-RAY DIFFRACTION 2.273Å

e5fa5B1[B:21-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.340Å

e5a1uD3[D:1-302] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COATOMER SUBUNIT BETA' ; ELECTRON MICROSCOPY

e5a1vD2[D:1-302] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COATOMER SUBUNIT BETA ; ELECTRON MICROSCOPY

e5a1vU1[U:1-302] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COATOMER SUBUNIT BETA ; ELECTRON MICROSCOPY

e5a1wD3[D:1-302] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COATOMER SUBUNIT BETA' ; ELECTRON MICROSCOPY

e5a1xD2[D:1-302] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COATOMER SUBUNIT BETA' ; ELECTRON MICROSCOPY

e5a1xL1[L:1-302] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COATOMER SUBUNIT BETA' ; ELECTRON MICROSCOPY

e5a1yD2[D:1-302] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COATOMER SUBUNIT BETA' ; ELECTRON MICROSCOPY

e5a1yL3[L:1-302] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COATOMER SUBUNIT BETA' ; ELECTRON MICROSCOPY

e5a1vL1[L:1-302] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COATOMER SUBUNIT BETA ; ELECTRON MICROSCOPY

e5ij7E1[E:67-426] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 6BN ; X-RAY DIFFRACTION 2.62Å

e5ij7F1[F:67-426] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 6BN ; X-RAY DIFFRACTION 2.62Å

e2ynoA1[A:1-310] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COATOMER SUBUNIT BETA' ; X-RAY DIFFRACTION 1.8Å

e4gqbB1[B:21-329] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.06Å

e2ynoB1[B:1-310] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COATOMER SUBUNIT BETA' ; X-RAY DIFFRACTION 1.8Å

e3mkqC1[C:2-303] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer beta'-subunit ; X-RAY DIFFRACTION 2.5Å

e4x60B1[B:19-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.350Å

e4x63B1[B:20-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 3.050Å

e5emlB1[B:19-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ligands: GOL ; X-RAY DIFFRACTION 2.390Å

e3ijcA1[A:80-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: NDS ; X-RAY DIFFRACTION 1.95Å

e2ynpA1[A:1-302] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COATOMER SUBUNIT BETA' ; X-RAY DIFFRACTION 2.96Å

e5ttwA1[A:79-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: SO4,UNX ; X-RAY DIFFRACTION 1.740Å

e5u5hA1[A:79-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 7VV,GOL ; X-RAY DIFFRACTION 1.80Å

e5u5kA1[A:79-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 7VY,FMT ; X-RAY DIFFRACTION 2.33Å

e5u5tA1[A:79-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 7W7 ; X-RAY DIFFRACTION 1.6Å

e5u5tB1[B:80-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 7W7,YT3 ; X-RAY DIFFRACTION 1.6Å

e5u62A1[A:79-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 7WD,GOL,YT3 ; X-RAY DIFFRACTION 1.9Å

e5u62B1[B:80-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 7WD ; X-RAY DIFFRACTION 1.9Å

e5h13A1[A:66-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: GOL,LQA,PR ; X-RAY DIFFRACTION 1.900Å

e1pguB2[B:327-613] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Actin interacting protein 1 ; ligands: ZN ; X-RAY DIFFRACTION 2.30Å

e1pi6A2[A:327-613] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Actin interacting protein 1 ; ligands: ZN ; X-RAY DIFFRACTION 2.50Å

e5emkB1[B:16-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.520Å

e5emmB1[B:16-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.370Å

e5c9zB1[B:16-328] Image Pymol Jmol Links: PDB, SCOP, CATH

Methylosome protein 50 ; X-RAY DIFFRACTION 2.36Å

e4lg8A1[A:195-504] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pre-mRNA-processing factor 19 ; ligands: NA,UNX ; X-RAY DIFFRACTION 1.890Å

e3mkqE1[E:1-303] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer beta'-subunit ; X-RAY DIFFRACTION 2.5Å

e4j86A1[A:1-301] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer subunit beta' ; X-RAY DIFFRACTION 1.48Å

e2ynnA1[A:1-300] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COATOMER SUBUNIT BETA' ; ligands: SO4 ; X-RAY DIFFRACTION 1.78Å

e4j77A1[A:1-300] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer subunit beta' ; X-RAY DIFFRACTION 1.756Å

e4j78A1[A:1-300] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer subunit beta' ; X-RAY DIFFRACTION 1.478Å

e4j79A1[A:1-300] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer subunit beta' ; X-RAY DIFFRACTION 1.559Å

e4j81A1[A:1-300] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer subunit beta' ; X-RAY DIFFRACTION 1.74Å

e4j81B1[B:1-300] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer subunit beta' ; X-RAY DIFFRACTION 1.74Å

e4j82A1[A:1-300] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer subunit beta' ; X-RAY DIFFRACTION 1.461Å

e4j84A1[A:1-300] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer subunit beta' ; X-RAY DIFFRACTION 1.47Å

e4j86B1[B:1-300] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer subunit beta' ; X-RAY DIFFRACTION 1.48Å

e4j77B1[B:1-299] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer subunit beta' ; X-RAY DIFFRACTION 1.756Å

e4j82B1[B:1-299] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer subunit beta' ; X-RAY DIFFRACTION 1.461Å

e4j73A1[A:1-295] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer subunit beta' ; X-RAY DIFFRACTION 1.439Å

e4j84B1[B:1-295] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Coatomer subunit beta' ; X-RAY DIFFRACTION 1.47Å

e3jpxA1[A:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POLYCOMB PROTEIN EED ; X-RAY DIFFRACTION 2.05Å

e3iiwA1[A:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 1.80Å

e3jzgA1[A:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POLYCOMB PROTEIN EED ; X-RAY DIFFRACTION 2.1Å

e3jzhA1[A:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POLYCOMB PROTEIN EED ; X-RAY DIFFRACTION 2.05Å

e3jznA1[A:82-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 2.6Å

e5ij8E1[E:68-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 6BN ; X-RAY DIFFRACTION 2.98Å

e5hynB1[B:77-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 2.94Å

e5hynG1[G:77-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 2.94Å

e5hynL1[L:77-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 2.94Å

e5hynR1[R:77-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 2.94Å

e5h15A1[A:78-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: LQD ; X-RAY DIFFRACTION 2.270Å

e5h19A1[A:78-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: LQF ; X-RAY DIFFRACTION 1.90Å

e5gsaA1[A:78-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 73K ; X-RAY DIFFRACTION 2.4900Å

e5gsaB1[B:78-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 73K ; X-RAY DIFFRACTION 2.4900Å

e5ls6B1[B:77-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 74D ; X-RAY DIFFRACTION 3.47Å

e5ls6E1[E:77-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 74D ; X-RAY DIFFRACTION 3.47Å

e5ls6H1[H:77-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 74D ; X-RAY DIFFRACTION 3.47Å

e5ls6K1[K:77-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 74D ; X-RAY DIFFRACTION 3.47Å

e5u69A1[A:82-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: LQD ; X-RAY DIFFRACTION 1.28Å

e5u6dA1[A:82-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 7XG ; X-RAY DIFFRACTION 1.64Å

e5u8aA1[A:82-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 82D ; X-RAY DIFFRACTION 1.45Å

e5u8fA1[A:82-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 82G ; X-RAY DIFFRACTION 1.343Å

e5ttwC1[C:77-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: SO4,UNX ; X-RAY DIFFRACTION 1.740Å

e5wukA1[A:76-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 73K,GOL ; X-RAY DIFFRACTION 2.03Å

e5wp3A1[A:77-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: UNX ; X-RAY DIFFRACTION 2.500Å

e3k26A1[A:80-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POLYCOMB PROTEIN EED ; X-RAY DIFFRACTION 1.58Å

e3k27A1[A:80-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POLYCOMB PROTEIN EED ; X-RAY DIFFRACTION 1.76Å

e2qxvA1[A:81-432] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Embryonic ectoderm development ; X-RAY DIFFRACTION 1.82Å

e5ij8F1[F:68-426] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 6BN ; X-RAY DIFFRACTION 2.98Å

e3odtA1[A:0-296] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein DOA1 ; ligands: CA ; X-RAY DIFFRACTION 1.35Å

e3odtB1[B:0-295] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein DOA1 ; ligands: CA,MES ; X-RAY DIFFRACTION 1.35Å

e3iiyA1[A:77-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 2.65Å

e3ij0A1[A:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 2.45Å

e3ij1A1[A:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 2.10Å

e5k0mA1[A:82-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 6PU ; X-RAY DIFFRACTION 1.828Å

e5h14A1[A:76-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: GOL,LQB ; X-RAY DIFFRACTION 1.900Å

e5h14B1[B:77-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: GOL,LQB ; X-RAY DIFFRACTION 1.900Å

e5h15B1[B:77-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: LQD ; X-RAY DIFFRACTION 2.270Å

e5h17A1[A:77-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: LQE ; X-RAY DIFFRACTION 2.20Å

e5h24A1[A:77-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: LQG ; X-RAY DIFFRACTION 2.500Å

e5h24B1[B:77-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: LQG ; X-RAY DIFFRACTION 2.500Å

e5h25A1[A:77-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: LQH ; X-RAY DIFFRACTION 2.880Å

e5h25B1[B:77-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: LQH ; X-RAY DIFFRACTION 2.880Å

e6ckcB1[B:21-329] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.8Å

e6exnJ1[J:110-451] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pre-mRNA-splicing factor PRP46 ; ELECTRON MICROSCOPY

e6c23L1[L:80-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ELECTRON MICROSCOPY

e4w2rF1[F:68-426] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 2.81Å

e6b3wE1[E:68-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 3.05Å

e4w2rE1[E:68-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 2.81Å

e6b3wF1[F:68-426] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 3.05Å

e6c24L1[L:80-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ELECTRON MICROSCOPY

e5wg6B1[B:81-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 3.90Å

e6chgA1[A:16-326] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

KLLA0E24487p ; ligands: SAM ; X-RAY DIFFRACTION 2.985Å

e5wg6D1[D:83-104,D:139-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 3.90Å

e6fcvB1[B:1-365] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA excision repair protein ERCC-8 ; X-RAY DIFFRACTION 2.9Å

e6j6gO1[O:95-451] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pre-mRNA-splicing factor PRP46 ; ELECTRON MICROSCOPY

e6j6hO1[O:95-451] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pre-mRNA-splicing factor PRP46 ; ELECTRON MICROSCOPY

e6j6nO1[O:95-451] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pre-mRNA-splicing factor PRP46 ; ELECTRON MICROSCOPY

e6j6qO1[O:95-451] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pre-mRNA-splicing factor PRP46 ; ELECTRON MICROSCOPY

e6k1sB1[B:21-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ligands: EDO ; X-RAY DIFFRACTION 2.600Å

e6sfbB1[B:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: GOL,L9K ; X-RAY DIFFRACTION 1.5Å

e6sfbA1[A:82-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: L9K ; X-RAY DIFFRACTION 1.5Å

e6sfcA1[A:82-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: CA,L9W ; X-RAY DIFFRACTION 2.0Å

e6sfcB1[B:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: L9T ; X-RAY DIFFRACTION 2.0Å

e6ugmK1[K:16-326] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Swd3 ; ELECTRON MICROSCOPY

e6uh5K1[K:16-326] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Swd3 ; ELECTRON MICROSCOPY

e6venM1[M:1-422] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COMPASS component SWD1 ; ELECTRON MICROSCOPY

e6rllB1[B:21-329] Image Pymol Jmol Links: PDB, SCOP, CATH

Methylosome protein 50 ; X-RAY DIFFRACTION 2.22Å

e6u4yE1[E:76-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 2.9Å

e6u4yF1[F:77-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 2.9Å

e6u4yD1[D:76-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 2.9Å

e6w7fA1[A:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: GOL,Q3D ; X-RAY DIFFRACTION 2.2Å

e6w7gA1[A:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: FMT,NA,Q3A ; X-RAY DIFFRACTION 1.85Å

e6uxxB1[B:19-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.69Å

e6rlqB1[B:21-329] Image Pymol Jmol Links: PDB, SCOP, CATH

Methylosome protein 50 ; X-RAY DIFFRACTION 2.53Å

e6v0oB1[B:21-329] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.86Å

e6uxyB1[B:19-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.35Å

e6v0nB1[B:23-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.11Å

e6lqsB11[B1:343-646,B1:675-734] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Periodic tryptophan protein 2 ; ELECTRON MICROSCOPY

e6lqtB11[B1:343-646,B1:675-734] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Periodic tryptophan protein 2 ; ELECTRON MICROSCOPY

e6zwmC1[C:8-326] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Target of rapamycin complex subunit LST8 ; ELECTRON MICROSCOPY

e6zwmD1[D:8-326] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Target of rapamycin complex subunit LST8 ; ELECTRON MICROSCOPY

e6zwoD1[D:8-326] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Target of rapamycin complex subunit LST8 ; ELECTRON MICROSCOPY

e7ksoB1[B:76-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ELECTRON MICROSCOPY

e7ksrB1[B:76-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ELECTRON MICROSCOPY

e7ktpB1[B:76-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ELECTRON MICROSCOPY

e6ughB1[B:23-329] Image Pymol Jmol Links: PDB, SCOP, CATH

Methylosome protein 50 ; ELECTRON MICROSCOPY

e6v0pB1[B:27-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 1.88Å

e6wkrL1[L:80-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ELECTRON MICROSCOPY

e7kljA1[A:1330-1654] Image Pymol Jmol Links: PDB, SCOP, CATH

Isoform 2 of Kinesin-like protein KIF21A ; ligands: EDO,UNX ; X-RAY DIFFRACTION 1.520Å

e7m05B1[B:23-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ELECTRON MICROSCOPY

e7l1gB1[B:18-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ligands: EDO ; X-RAY DIFFRACTION 2.4600Å

e7kicB1[B:18-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ligands: EDO ; X-RAY DIFFRACTION 2.43Å

e7kxtA1[A:77-441] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: UNX,XB7 ; X-RAY DIFFRACTION 2.150Å

e7kibB1[B:19-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ligands: EDO ; X-RAY DIFFRACTION 2.52Å

e7m05D1[D:23-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ELECTRON MICROSCOPY

e7m05F1[F:23-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ELECTRON MICROSCOPY

e7m05H1[H:23-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ELECTRON MICROSCOPY

e7kidB1[B:18-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.50Å

e7kxtB1[B:80-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: UNX,XB7 ; X-RAY DIFFRACTION 2.150Å

e6yviB1[B:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: PV5 ; X-RAY DIFFRACTION 2.26Å

e6v3xA1[A:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 1.70Å

e6yviA1[A:82-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: CA,L9W ; X-RAY DIFFRACTION 2.26Å

e6yvjA1[A:82-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: L9W ; X-RAY DIFFRACTION 1.840Å

e6v3yA1[A:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; X-RAY DIFFRACTION 1.63Å

e6yvjB1[B:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: EJR,GOL ; X-RAY DIFFRACTION 1.840Å

e6lo2A1[A:77-440] Image Pymol Jmol Links: PDB, SCOP, CATH

Polycomb protein EED ; ligands: EJU ; X-RAY DIFFRACTION 2.210Å

e6lo2B1[B:77-440] Image Pymol Jmol Links: PDB, SCOP, CATH

Polycomb protein EED ; ligands: EJU ; X-RAY DIFFRACTION 2.210Å

e7p3cA1[A:82-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: L9W ; X-RAY DIFFRACTION 1.610Å

e7p3gA1[A:82-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: L9W ; X-RAY DIFFRACTION 2.390Å

e7p3gB1[B:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 52R ; X-RAY DIFFRACTION 2.390Å

e7p3jA1[A:82-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: L9W,MG ; X-RAY DIFFRACTION 1.930Å

e7p3jB1[B:81-439] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: 54N ; X-RAY DIFFRACTION 1.930Å

e7ooba1[a:1-365] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA excision repair protein ERCC-8 ; ELECTRON MICROSCOPY

e7s1rB1[B:19-329] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.0Å

e7s0uB1[B:27-329] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.01Å

e7s1qB1[B:23-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.75Å

e7s1sB1[B:19-329] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.6Å

e7serB1[B:19-329] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.14Å

e7sesB1[B:19-329] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.5Å

e7oo3a1[a:1-365] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA excision repair protein ERCC-8 ; ELECTRON MICROSCOPY

e7oopa1[a:1-365] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA excision repair protein ERCC-8 ; ELECTRON MICROSCOPY

e7opca1[a:1-365] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA excision repair protein ERCC-8 ; ELECTRON MICROSCOPY

e7opda1[a:1-365] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA excision repair protein ERCC-8 ; ELECTRON MICROSCOPY

e7s1pB1[B:27-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.2Å

e7bo7BBB1[BBB:19-329] Image Pymol Jmol Links: PDB, SCOP, CATH

Methylosome protein 50 ; X-RAY DIFFRACTION 2.83Å

e7uohB1[B:19-329] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.7Å

e7u30B1[B:18-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ligands: EDO ; X-RAY DIFFRACTION 2.6Å

e8d41A1[A:-6-300] Image Pymol Jmol Links: PDB, SCOP, CATH

Coatomer subunit beta' ; ligands: GOL,Q93,UNX ; X-RAY DIFFRACTION 2.000Å

e8d41B1[B:2-300] Image Pymol Jmol Links: PDB, SCOP, CATH

Coatomer subunit beta' ; ligands: Q93 ; X-RAY DIFFRACTION 2.000Å

e7qjgA1[A:77-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: CL,EKR ; X-RAY DIFFRACTION 1.800Å

e7qjgB1[B:77-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: CL,EKR ; X-RAY DIFFRACTION 1.800Å

e7qjuA1[A:77-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: CL,EKF ; X-RAY DIFFRACTION 1.800Å

e7qjuB1[B:77-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: CL,EKF ; X-RAY DIFFRACTION 1.800Å

e7qk4A1[A:78-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Polycomb protein EED ; ligands: CL,EJR ; X-RAY DIFFRACTION 1.602Å

e7uy1B1[B:20-329] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.660Å

e8csgB1[B:27-329] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.480Å

e7uyfB1[B:25-329] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.820Å

e8ctbB1[B:24-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; X-RAY DIFFRACTION 2.61Å

e7tzoC1[C:8-326] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Target of rapamycin complex subunit LST8 ; ELECTRON MICROSCOPY

e7tzoD1[D:8-326] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Target of rapamycin complex subunit LST8 ; ELECTRON MICROSCOPY

e7zupB1[B:19-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ligands: GOL ; X-RAY DIFFRACTION 1.97Å

e7zuqB1[B:19-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ligands: GOL ; X-RAY DIFFRACTION 2.48Å

e7zuuB1[B:19-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ligands: GOL ; X-RAY DIFFRACTION 2.09Å

e7zuyB1[B:19-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ligands: GOL ; X-RAY DIFFRACTION 1.97Å

e7zv2B1[B:19-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methylosome protein 50 ; ligands: GOL ; X-RAY DIFFRACTION 2.01Å

Next

e2ovrB1[B:2365-2706] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

F-box/WD repeat protein 7 ; ligands: SO4 ; X-RAY DIFFRACTION 2.50Å

e5i2tA1[A:344-620,A:678-707] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Periodic tryptophan protein 2 ; X-RAY DIFFRACTION 2.54Å

e5i2tA2[A:4-343] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Periodic tryptophan protein 2 ; ligands: SO4 ; X-RAY DIFFRACTION 2.54Å

e1nexB1[B:370-744] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CDC4 protein ; X-RAY DIFFRACTION 2.7Å

e1p22A1[A:253-545] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

F-BOX/WD-REPEAT PROTEIN 1A ; X-RAY DIFFRACTION 2.95Å

e3sfzA5[A:605-916] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

APOPTOTIC PEPTIDASE ACTIVATING FACTOR 1 ; ligands: GBL ; X-RAY DIFFRACTION 3.0Å

e5k1cC1[C:1-318,C:363-394,C:509-568] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

WD repeat-containing protein 20 ; ligands: TAM ; X-RAY DIFFRACTION 3.0Å

e1vyhC1[C:92-408] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PLATELET-ACTIVATING FACTOR ACETYLHYDROLASE IB ALPHA SUBUNIT ; X-RAY DIFFRACTION 3.4Å

e5cvoA1[A:27-360] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

WD repeat-containing protein 48 ; X-RAY DIFFRACTION 3.880Å

e3jroA1[A:8-296] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fusion Protein of Protein Transport Protein SEC13 and Nucleoporin NUP145 ; X-RAY DIFFRACTION 4.0Å

e4yczA1[A:19-303] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fusion Protein of Sec13 and Nup145C ; X-RAY DIFFRACTION 4.10Å

e1tbgA1[A:1-340] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSDUCIN ; X-RAY DIFFRACTION

e4ui9R1[R:172-474] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FIZZY-RELATED PROTEIN HOMOLOG ; ELECTRON MICROSCOPY

e5a9q21[2:9-326] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NUCLEOPORIN NUP37 ; ELECTRON MICROSCOPY

e5ch1A1[A:6-356,A:507-557] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e5h64B3[B:778-1251] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Regulatory-associated protein of mTOR ; ELECTRON MICROSCOPY

e5mpso1[o:155-454] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pre-mRNA-processing factor 17 ; ELECTRON MICROSCOPY

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.

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