Structural Classification of Proteins




Class: Alpha and beta proteins (a+b)
- Mainly antiparallel beta sheets (segregated alpha and beta regions)
Lineage:
- Root: scop
- Class: Alpha and beta proteins (a+b) [53931]
Mainly antiparallel beta sheets (segregated alpha and beta regions)
Folds:
- Microbial ribonucleases [53932] (1)

single helix packs against antiparallel beta-sheet
- Lysozyme-like [53954] (1)

common alpha+beta motif for the active site region
- Cysteine proteinases [54000] (1)

consists of one alpha-helix and 4 strands of antiparallel beta-sheet and contains the catalytic triad Cys-His-Asn
- His-Me finger endonucleases [54059] (1)

core: (alpha)-beta-omega_loop-beta-alpha; embeded in larger different structures
- RNase A-like [54075] (1)

contains long curved beta-sheet and 3 helices
- EndoU-like [142876] (1)

comprises several helices and two three-stranded antiparallel beta-sheets; similar architecture to the RNase A-like fold (scop_cf 54075)
- Prion-like [54097] (1)

beta-alpha-beta-alpha(2); antiparallel beta-ribbon
- LysM domain [54105] (1)

beta-alpha(2)-beta; antiparallel strands
- Head-to-tail joining protein W, gpW [64209] (1)

alpha-beta(2)-alpha; antiparallel hairpin
- Hypothetical protein MTH677 [110782] (1)

alpha-beta(2)-alpha; 2 layers a/b; antiparallel beta-hairpin
- GTF2I-like repeat [117772] (1)

alpha(2)-beta-alpha-beta-alpha; 2 layers: a/b; antiparallel beta-ribbon
- Urease, gamma-subunit [54110] (1)

alpha(3)-beta(2); antiparallel hairpin
- IL8-like [54116] (2)

beta(3)-alpha
- DNA-binding domain [54170] (1)

beta(3)-alpha; 2 layers: alpha/beta
- Penicillin-binding protein 2x (pbp-2x), c-terminal domain [54183] (1)

alpha1-beta3; 2 layers: alpha/beta; order 132
- Dodecin subunit-like [88797] (5)

beta-alpha-beta(2); 2 layers: alpha/beta; antiparallel beta-sheet: order 132
- Ribosomal proteins S24e, L23 and L15e [54188] (1)

beta-(alpha)-beta-alpha-beta(2); 3 layers: alpha/beta/alpha; antiparallel beta-sheet: order 1243
- Ribosome binding domain-like [100965] (2)

beta-(2)-alpha(2)-beta(2); 2 layers: beta/alpha; antiparallel beta-sheet: order 1243; topological similarity to the common core of ribosomal proteins L23 and L15e
- TFB5-like [142896] (1)

beta-alpha-beta(2)-alpha; 2 layers, a/b; antiparallel sheet, order: 132; dimerises in solution (PDB 2jnj) via extended N-terminal strand
- Obg GTP-binding protein C-terminal domain [102740] (1)

beta-(2)-alpha(3)-beta(2); 2 layers: beta/alpha; mixed beta-sheet: order 1234; strands 2 and 3 a parallel to each other
- HIT-like [54196] (2)

alpha-beta(3)-alpha-beta(2); 3 layers: alpha/beta/alpha
- Secretion chaperone-like [69634] (3)

alpha-beta(3)-alpha-beta(2)-alpha; 2 layers: alpha/beta
- DNA-binding domain of intron-encoded endonucleases [64495] (1)

beta(2)-alpha(2)-beta; 2 layers; 3-stranded antiparallel beta-sheet, order 213; HTH motif; also includes the extra N-terminal, DNA minor groove-binding helix
- MotA C-terminal domain-like [69651] (1)

alpha-beta(4)-alpha-beta(2)-alpha; 2 layers: alpha/beta
- YktB/PF0168-like [142912] (1)

alpha-beta(4)-alpha-beta(2)-alpha-beta-alpha; 2 layers, a/b; antiparallel beta-sheet, order: 1234756; half-barrel shape; topological similarity to the MotA C-terminal domain-like fold (scop_cf 69651) and the Secretion chaperone-like fold (scop_cf 69634)
- Mago nashi protein [89816] (1)

beta(4)-alpha-beta(2)-alpha; 2 layers: alpha/beta; antiparallel beta-sheet, order: 651234
- WGR domain-like [142920] (1)

beta(4)-alpha-X-beta; 2 layers, a/b; antiparallel beta-sheet, order 51234; the beta-hairpin insetrion in strand 1 results in the formation of a beta-triangle structure
- Ribosomal protein S5 domain 2-like [54210] (1)

core: beta(3)-alpha-beta-alpha; 2 layers: alpha/beta; left-handed crossover
- beta-Grasp (ubiquitin-like) [54235] (13)

core: beta(2)-alpha-beta(2); mixed beta-sheet 2143
- WWE domain [117838] (1)

beta(2)-alpha-beta(4); antiparallel folded beta-sheet (half-barrel), order 216543
- FAD-linked reductases, C-terminal domain [54372] (1)

alpha+beta sandwich
- Cystatin-like [54402] (7)

Core: alpha-beta(4); helix packs against coiled antiparallel beta-sheet
- Nuclease A inhibitor (NuiA) [82601] (1)

alpha-beta-alpha-beta-alpha(2)-beta(3); antiparallel beta-sheet; order: 15432
- Colicin D/E5 nuclease domain [102823] (1)

alpha(2)-beta(4)-alpha, 2 layers: alpha/beta, antiparallel beta sheet, meander
- RelE-like [143010] (1)

beta-alpha(2)-beta(4), 2 layers; a/b, antiparallel beta-sheet; order 15432
- Hypothetical protein SAV1430 [110835] (1)

beta(3)-alpha-beta(2)-alpha; 2 layers, alpha/beta; antiparallel beta-sheet, order: 12543
- Ns1 effector domain-like [143020] (1)

beta-X-beta(5)-alpha-beta-alpha; 2 layers: a/b; bifurcated beta-sheet; order 23654[1,7]
- YbaB-like [82606] (1)

core: alpha-beta(3)-alpha, 2 layers:alpha/beta, three-stranded antiparallel beta sheet, strand order 123
- Kinetochore globular domain-like [143025] (1)

core: alpha-beta(3)-alpha; variant: alpha-beta(4)-alpha(2)
- L35p-like [143033] (1)

core: alpha-beta(3)-alpha; 2layers a/b
- Cell division protein ZapA-like [102828] (1)

core: beta(2)-alpha(2), 2 layers: alpha/beta; long C-terminal helix forms dimeric parallel and tetrameric antiparallel coiled coils
- ssDNA-binding transcriptional regulator domain [54446] (1)

helix-swapped dimer of beta(4)-alpha motifs
- Photosystem I subunit PsaD [64233] (1)

beta-BETA(2)-beta-alpha-beta(2); antiparallel sheet: order 2134 packed against helix and BETA-hairpin on the same side; irregular C-terminal tail
- MHC antigen-recognition domain [54451] (1)

dimeric
- UBC-like [54494] (1)

alpha-beta(4)-alpha(3); core: meander beta-sheet plus one helix 2
- SAND domain-like [63762] (1)

core: three short helices packed against a barrel-like beta-sheet; some similarity to the SH3-like fold
- Coronavirus NSP8-like [143075] (1)

core: alpha-beta(2)-alpha-beta(4)-alpha-beta; bifurcated barrel-like beta-sheet
- ParB/Sulfiredoxin [110848] (1)

beta*-alpha-beta(2)-alpha-beta-alpha; mixed beta sheet forms a partly open barrel: (n*=4, S*=8)
- BtrG-like [110856] (1)

beta-alpha-beta(4)-alpha-beta(2); contains beta-sheet barrel (n=5, S=8)
- BB1717-like [143080] (1)

complex fold with a bifurcated beta-sheet structure surrounded by helices; contains beta-sheet barrel, closed (n=5, S=8)
- AF0104/ALDC/Ptd012-like [117855] (1)

duplication: consists of two similar beta-alpha-beta(4) motifs
- NSFL1 (p97 ATPase) cofactor p47, SEP domain [102847] (1)

beta(3)-alpha(2)-beta; 2 layers; mixed beta-sheet, order 4123, strands 1 and 4 are parallel to each other
- TTHA1013-like [143099] (1)

beta(3)-alpha-beta; 2 layers; mixed beta-sheet, order 4123, strands 1 and 4 are parallel to each other; topological similarity to the SEP domain fold (scop_cf 102847); dimerises via the long C-terminal strand with the formation of a single beta-sheet
- Diaminopimelate epimerase-like [54505] (1)

mixed beta-sheet folds into a barrel (n=8, S=14) around the central helix
- GFP-like [54510] (1)

beta-sheet folds into a barrel (n=11, S=14) around the central helix
- Tubby C-terminal domain-like [54517] (1)

beta-sheet folds into a barrel (n=12, S=12) around the central helix
- Pili subunits [54522] (1)

contains very long N-terminal helix, which end is packed against beta-sheet
- Mitochondrial glycoprotein MAM33-like [54528] (1)

core: beta(7)-alpha(2); N- and C-terminal extensions form a coiled coil subdomain
- NAP-like [143112] (1)

core: central meander 4-stranded beta-sheet (order: 1234) transversed by a C-terminal helix
- Polo-box domain [82614] (1)

beta(6)-alpha; antiparallel beta-sheet, meander
- mRNA decapping enzyme DcpS N-terminal domain [102859] (1)

beta(3)-alpha-beta(3)-alpha; 3 layers a/b/a
- Inhibitor of vertebrate lysozyme, Ivy [89871] (1)

alpha(2)-beta(5)-alpha(2); 3 layers a/b/a; meander beta-sheet
- FKBP-like [54533] (3)

core: beta(2)-alpha-beta(2); antiparallel beta-sheet
- Ribosomal protein S16 [54564] (1)

beta(4)-alpha-beta; 2 layers: alpha/beta; mixed beta-sheet, order: 51234
- Ribosomal protein S19 [54569] (1)

alpha-beta-X-beta(2); 2 layers: alpha/beta; mixed beta-sheet, order: 123
- YefM-like [143119] (1)

core: beta-alpha(2)-beta(2)-alpha; mixed beta-sheet, order:123, strands 1 and 2 are parallel; forms compact dimer with a single beta-sheet;
- Ribosomal protein L31e [54574] (1)

beta-alpha-beta-(alpha)-beta(2); 2 layers: alpha/beta; mixed beta-sheet, order: 1342
- Allophycocyanin linker chain (domain) [54579] (1)

beta(2)-alpha-beta; 2 layers: alpha/beta
- Cdc48 domain 2-like [54584] (1)

beta-alpha-beta(3); 2 layers: alpha/beta
- Glyoxalase/Bleomycin resistance protein/Dihydroxybiphenyl dioxygenase [54592] (1)

beta-alpha-beta(3); 2 layers: alpha/beta
- Chromosomal protein MC1 [102874] (1)

beta(2)-alpha-beta(3); 2 layers: alpha/beta
- beta-hairpin-alpha-hairpin repeat [74651] (2)

multiple repeats of beta(2)-alpha(2) motif
- Proguanylin [89889] (1)

beta(2)-alpha(3)-beta; two layers: alpha/beta; antiparallel sheet: order 213
- Bacterial protein-export protein SecB [54610] (1)

beta(4)-alpha(2); two layers: alpha/beta; antiparallel sheet: order 1432
- MesJ substrate recognition domain-like [82828] (1)

beta-alpha(2)-beta(3); 2 layers: a/b; antiparallel beta-sheet, order:1432
- FYSH domain [89894] (1)

beta(2)-alpha(2)-beta(2)-alpha-beta; two layers: alpha/beta; antiparallel sheet: order 51234
- VSV matrix protein [75403] (1)

beta-alpha(2)-beta(4)-alpha-beta(2); two layers: alpha/beta; bifurcated coiled beta-sheet: order of the first 5 strands: 23154
- DNA-binding domain of Mlu1-box binding protein MBP1 [54615] (1)

beta(4)-alpha(2)-beta(2)-alpha; antiparallel sheet: order 123465
- Heme-binding protein A (HasA) [54620] (1)

beta-alpha-beta(6)-alpha(2); antiparallel sheet: order 165432
- Chalcone isomerase [54625] (1)

beta(3)-alpha(2)-beta-alpha(2)-beta3; 2 layers alpha/beta; antiparallel sheet: order 1234567
- Coproporphyrinogen III oxidase [102885] (1)

alpha-beta(6)-alpha(2)-beta-alpha(n); 3 layers alpha/beta/alpha; antiparallel sheet: order 1234567
- Hypothetical protein Ta1206 [102890] (1)

beta(4)-alpha-beta(2)-alpha(2); mixed, predominately antiparallel beta-sheet, order: 123465, strands 4 and 5 are parallel to each other
- CBS-domain [54630] (1)

core: beta-alpha-beta(4); 2 layers: alpha/beta
- Thioesterase/thiol ester dehydrase-isomerase [54636] (1)

core: beta-alpha-beta(4); 2 layers: alpha/beta
- DLC [54647] (1)

core: beta-alpha(2)-beta-X-beta(2); 2 layers: alpha/beta; antiparallel beta-sheet: order 1342
- CI-2 family of serine protease inhibitors [54653] (1)

alpha+beta sandwich; loop across free side of beta-sheet
- Integrin beta tail domain [69686] (1)

alpha-beta-loop-beta(3); loop across free side of beta-sheet
- alpha/beta-Hammerhead [54664] (5)

core: beta-BETA-alpha-beta-BETA-beta-alpha; contains a beta-hammerhead motif similar to that in barrel-sandwich hybrids
- POZ domain [54694] (1)

core: beta(2)-alpha(2)-beta(2)-alpha(2); 2 layers a/b; mixed sheet: 2143
- EF-Ts domain-like [54712] (2)

beta(2)-alpha(n)-beta; 2 layers a/b; antiparallel sheet: 123
- Fe,Mn superoxide dismutase (SOD), C-terminal domain [54718] (1)

alpha-beta(2)-alpha-beta-alpha(2); 3 strands of antiparallel sheet: 213
- ClpS-like [54735] (1)

beta-alpha(2)-beta-alpha-beta; 2 layers, alpha/beta
- Hypothetical protein MTH1880 [75411] (1)

beta-alpha-beta(2)-alpha(2); 3 layers, alpha/beta/alpha; antiparallel beta-sheet: order 123
- Ribosomal L11/L12e N-terminal domain [54746] (1)

beta-alpha(2)-beta(2); 2 layers, alpha/beta; antiparallel beta-sheet: order 123
- Anti-LPS factor/recA domain [54751] (2)

alpha-beta(3)-alpha(2); 2 layers, alpha/beta
- Signal recognition particle alu RNA binding heterodimer, SRP9/14 [54761] (1)

(beta)-alpha-beta(3)-alpha; 2 layers, alpha/beta
- dsRBD-like [54767] (5)

alpha-beta(3)-alpha; 2 layers: alpha/beta
- 2-isopropylmalate synthase LeuA, allosteric (dimerisation) domain [110920] (1)

duplication: consists of two beta(3)-alpha repeats; 3 layers, beta/alpha/beta
- SRP19 [69694] (1)

beta-alpha-beta(2)-alpha; 2 layers: alpha/beta
- SufE/NifU [82648] (1)

alpha(2)-beta(3)-alpha(3); 2 layers alpha/beta, 3-stranded antiparallel beta-sheet; order 123
- DNA-binding protein Tfx [89914] (1)

alpha(3)-beta-alpha(2)-beta(2); 2 layers alpha/beta, 3-stranded antiparallel beta-sheet; order 123
- Eukaryotic type KH-domain (KH-domain type I) [54790] (1)

beta-alpha(2)-beta(2)-alpha; 2 layers: alpha/beta
- Alpha-lytic protease prodomain-like [54805] (8)

core: alpha-beta(2)-(alpha)-beta; 2 layers: alpha/beta
- Nucleotidyltransferase [81302] (1)

core: alpha-beta-turn-beta-X-beta-(alpha); mixed beta-sheet, order of core strands: 123
- Nqo5-like [143242] (1)

core: alpha-beta(2)-alpha-beta(3); 2 layers, a/b; mixed beta-sheet, order 12534, strands 2 and 5 are parallel
- Ribosomal protein S3 C-terminal domain [54820] (1)

alpha(2)-beta(4); 2 layers: alpha/beta; antiparallel beta-sheet: order 2143
- Transcription factor NusA, N-terminal domain [69704] (1)

alpha-beta(3)-alpha-beta-alpha; bifurcated coiled beta-sheet
- Enolase N-terminal domain-like [54825] (1)

beta(3)-alpha(3); meander and up-and-down bundle
- Ribosomal protein L22 [54842] (1)

beta-alpha(3)-beta(2); 2 layers: alpha/beta; related to the enolase/MLE N-domain fold by a circular permutation
- Prokaryotic ribosomal protein L17 [64262] (1)

alpha-beta-alpha(3)-beta(2); 2 layers: alpha/beta;
- GroEL-intermediate domain like [54848] (1)

3-helical bundle packed against 3-stranded mixed beta-sheet
- PX domain [64267] (1)

beta(3)-alpha(4); meander beta-sheet packed against array of helices; contains Pro-rich stretch
- DsrC, the gamma subunit of dissimilatory sulfite reductase [69720] (1)

beta(3)-alpha(5); meander beta-sheet packed against array of helices
- DNA damage-inducible protein DinI [54856] (1)

beta-alpha-beta(2)-alpha; 2 layers: alpha/beta; mixed sheet 213; crossing loops
- HSP90 C-terminal domain [110941] (1)

alpha-beta(3)-alpha(3); 2 layers, a/b; mixed beta-sheet, order:132; crossing loops
- Ferredoxin-like [54861] (55)

alpha+beta sandwich with antiparallel beta-sheet; (beta-alpha-beta)x2
- PurS-like [109622] (1)

consists of two alpha+beta subdomains with some similarity to the ferredoxin-like fold
- Dystroglycan, domain 2 [111005] (1)

beta-alpha-beta-X-beta(2)-alpha(2)-beta; antiparallel beta-sheet, order 24153; topological similarity to the ferredoxin-like fold (scop_cf 54861)
- Pseudouridine synthase [100877] (1)

consists of two alpha+beta subdomains with some similarity to the ferredoxin-like fold
- Folate-binding domain [103024] (1)

duplication: consists of two beta(2)-alpha-beta(3)-alpha subdomains swapped with the first strands
- THUMP domain [143436] (1)

contains mixed 8-stranded beta-sheet, folded into a half-barrel and covered with 4 helices on the outside; order 32148756; strands 5, 6 and 7 are parallel
- AMMECR1-like [143446] (1)

duplication; contains two beta(2)-alpha-beta(2) structural repeats, swapped with C-terminal strands; extra N-terminal helix and C-terminal strand
- YehU-like [118000] (1)

beta-alpha(2)-beta(2)-alpha; 3 layers, alpha/beta/alpha; antiparallel beta-sheet: order 123
- Hypothetical protein YwqG [103031] (1)

duplication: contains two similar beta-x-beta(4) motifs swapped with the first strands
- VC0467-like [143455] (1)

complex fold; contains bifurcated beta-sheet structure folded into pseudo barrel
- Lesion bypass DNA polymerase (Y-family), little finger domain [100878] (1)

beta-alpha-beta(2)-alpha-beta; antiparallel beta-sheet: order 1423; "reversed" ferredoxin-like topology
- ImmE5-like [143468] (1)

alpha-beta(2)-alpha-beta; 2 layers, a/b; antiparallel beta-sheet, order 213
- Ribosomal protein L30p/L7e [55128] (1)

core: beta-alpha-beta-alpha-beta; antiparallel beta-sheet: order 312; some similarity to the ferredoxin-like fold
- Chorismate lyase-like [64287] (1)

duplication of alpha(2)-beta(3) motif; antiparallel beta sheet, order 123654
- TM1622-like [143476] (1)

alpha-beta(3)-alpha-beta(4)-alpha; 3 layers, a/b/a; antiparallel beta-sheet, order: 1237654
- Probable bacterial effector-binding domain [55135] (1)

duplication of beta-alpha-beta(2) motif: antiparallel beta sheet forms barrel (n=6, S=12)
- CheC-like [103038] (1)

duplication: tandem repeat of two intertwined alpha-beta-(X)-beta(2) motifs
- LigT-like [55143] (1)

duplication of beta-alpha-beta-alpha-beta motif: antiparallel beta sheet forms barrel (n=6, S=8) similar to the barrel of prokaryotic DNA topoisomerases I and III
- Pepsin inhibitor-3 [55148] (1)

duplication of beta(3)-alpha(2) motif: meander beta sheets form barrel-like structure
- CYTH-like phosphatases [55153] (1)

duplication of beta-alpha-beta(3) motif: antiparallel beta sheet forms wide barrel (n=8, S=16) with a channel running through it
- Antiparallel beta/alpha barrel (PT-barrel) [143491] (1)

tandem repeat of five alpha(2)-beta(2) motifs; antiparallel beta-sheet barrel, closed; n=10, S=10; order 123456789A; there is a channel along the barrel axis
- eIF1-like [55158] (2)

beta(2)-alpha-beta(2)-alpha-beta; 2 layers: alpha/beta; mixed beta-sheet: order 51243
- Hedgehog/DD-peptidase [55165] (1)

alpha-beta(2)-alpha-beta(2); 2 layers: alpha/beta
- Alpha-L RNA-binding motif [55173] (1)

alpha(2)-beta(2)-loop-beta; 2 layers: alpha/beta
- RRF/tRNA synthetase additional domain-like [55185] (4)

core: alpha-beta(2)-alpha-beta(2); 2 layers: alpha/beta
- LuxS/MPP-like metallohydrolase [63410] (1)

core: beta-alpha-beta(2)-alpha(2); 2 layers: alpha/beta
- IF3-like [55199] (7)

beta-alpha-beta-alpha-beta(2); 2 layers; mixed sheet 1243, strand 4 is antiparallel to the rest
- PUG domain-like [143502] (1)

alpha(2)-beta-alpha(2)-beta(2)-alpha; cluster of helices with a small antiparallel beta-sheet on one side; order 132; topological similarity to the fold of an extended R3H domain (PDB 1whr)
- Ribosome binding protein Y (YfiA homologue) [69753] (1)

beta-alpha-beta(3)-alpha; 2 layers; mixed sheet 1234, strand 3 is antiparallel to the rest
- TolA/TonB C-terminal domain [74652] (1)

beta(2)-alpha-beta; 2 layers, alpha/beta; left-handed beta-alpha-beta unit in non-swapped monomer
- Yeast killer toxins [55220] (1)

beta-alpha-beta(2)-alpha-beta(2); 2 layers, alpha/beta; left-handed crossover connection
- Cell division protein MinE topological specificity domain [55228] (1)

dimer of alpha-beta(2) motifs ; 2 layers, alpha/beta
- Hypothetical protein YoaG [103062] (1)

dimer of beta(2)-alpha motifs ; 2 layers, alpha/beta; reverse MinE topology
- Nucleocapsid protein dimerization domain [103067] (1)

dimer of alpha-beta(2)-alpha motifs ; 2 layers, alpha/beta
- Cyanase C-terminal domain [55233] (1)

intertwined dimer of alpha-beta(2) motifs ; 2 layers, alpha/beta
- Multidrug efflux transporter AcrB TolC docking domain; DN and DC subdomains [82713] (1)

Intertwined pseudo hexamer of an alpha+beta motif
- RuBisCO, small subunit [55238] (1)

alpha-beta(2)-alpha-beta(2); 2 layers, alpha/beta
- DCoH-like [55247] (4)

beta(2)-alpha-beta(2)-alpha; 2 layers, alpha/beta
- TRCF domain-like [143516] (1)

beta-alpha(3)-beta(2)-alpha-beta(2)-alpha; 2 layers: alpha/beta; mixed beta sheet, order 12354, strands 1 and 2 are parallel; some topological similarity to the DCoH-like fold (scop_cf 55247)
- Hypothetical protein Yml108w [100886] (1)

beta(2)-alpha-beta(2)-alpha; 2 layers, alpha/beta; mixed beta-sheet 2143, strands 1 and 4 are parallel
- MutS N-terminal domain-like [55266] (2)

beta(2)-alpha-beta(2)-alpha-beta(2); 2 layers, alpha/beta
- GYF domain [55276] (1)

beta(2)-alpha-beta(2)-alpha; 2 layers, alpha/beta
- GTP cyclohydrolase I feedback regulatory protein, GFRP [69760] (1)

beta(2)-alpha-beta(2)-alpha-beta(2); 2 layers, alpha/beta, antiparallel beta-sheet: order 342165
- Ribosomal protein L5 [55281] (1)

beta-alpha-beta(2)-alpha-beta(3)-alpha; 2 layers, alpha/beta; antiparallel beta-sheet: order 231654
- RPB5-like RNA polymerase subunit [55286] (1)

core: beta-alpha-beta-alpha-beta(2); 2 layers, alpha/beta
- Bacillus chorismate mutase-like [55297] (7)

core: beta-alpha-beta-alpha-beta(2); mixed beta-sheet: order: 1423, strand 4 is antiparallel to the rest
- YjbQ-like [111037] (1)

beta(2)-alpha-beta(2)-alpha(2)-beta(3); contains a beta-sandwich: 7 strands in 2 sheets; trimerizes with orthogonally packed beta-sheets
- Tautomerase/MIF [55330] (1)

(beta-alpha-beta)2; 2 layers: alpha/beta; mixed beta-sheet
generally forms trimers with three closely packed beta-sheets
- FwdE/GAPDH domain-like [55346] (3)

core: alpha-beta-alpha-beta(3); mixed sheet: 2134, strand 2 is parallel to strand 1
- Hypothetical protein PF0899 [111056] (1)

alpha-beta-alpha-beta(4); 2 layers: a/b; mixed beta-sheet, order 23145, strands 1 and 3 are parallel; similar to the GAPDH C-terminal domain-like fold (scop_cf 55346)
- Major capsid protein gp5 [56562] (1)

unusual fold; contains PF0899-like core, decorated with additional structure
- MK0786-like [143559] (1)

alpha(2)-beta(4); 2 layers: a/b; antiparallel beta-sheet, order 1234 (meander)
- YkuJ-like [143566] (1)

alpha-beta(4)-alpha; 2 layers a/b; antiparallel beta-sheet, order 1234
- N domain of copper amine oxidase-like [55382] (5)

alpha-beta(5)-alpha; 2 layers: alpha/beta; meander antiparallel sheet
- Aha1/BPI domain-like [55393] (2)

core: [beta]-alpha-beta(5)-alpha; 2 layers: alpha/beta; antiparallel beta-sheet, meander
- Subtilisin inhibitor [55398] (1)

alpha+beta sandwich
- RNA bacteriophage capsid protein [55404] (1)

6-standed beta-sheet followed with 2 helices; meander
- eIF4e-like [55417] (1)

beta(2)-alpha-beta(2)-alpha-beta(2)-alpha-beta-2; 2 layers: alpha/beta; antiparallel sheet: 21356478
- CO dehydrogenase flavoprotein C-domain-like [55423] (2)

core: beta(3,4)-alpha(3); alpha+beta sandwich
- SRF-like [55454] (1)

alpha-beta(2)-alpha; dimer; 3 layers a/b/a; antiparallel beta-sheet
- Origin of replication-binding domain, RBD-like [55463] (1)

alpha-beta-alpha-beta(2)-alpha-beta-alpha-beta; 3 layers: a/b/a; antiparallel sheet 41325
- SARS receptor-binding domain-like [143586] (1)

core: 3 layers, a/b/a; antiparallel beta-sheet of 5 strands, order 13542
- Hut operon positive regulatory protein HutP [111063] (1)

alpha(2)-beta-alpha(2)-beta(3); 3 layers: a/b/a; antiparallel beta-sheet: order 1234
- Hypothetical protein yfbM [111068] (1)

beta-alpha(2)-beta-alpha(2)-beta(2)-alpha(n)-beta; 3 layers: a/b/a; antiparallel beta-sheet, order: 21543
- TTHA1528-like [143591] (1)

beta-alpha-beta(3)-alpha-beta-alpha(2)-beta; 3 layers: a/b/a; mixed beta-sheet, order: 143256, parallel strands' pairs are 1-4 and 2-5
- YojJ-like [143596] (1)

alpha-beta-X-beta-alpha-beta(2)-alpha-beta(3); 3 layers: a/b/a; 7-stranded mixed beta-sheet, order 2431567; strands 1 and 3 are parallel to each other
- STIV B116-like [143601] (1)

subunit fold consists of mixed 5-stranded beta-sheet, order:31452, strand 5 is antiparallel to the rest, with 3 helices on one side; dimerises with the formation of a single 10-stranded beta-sheet; strand 2 is in the dimer interface
- Bacillus phage protein [111073] (1)

alpa-beta(3)-alpha-beta(3)-alpha; 3 layers: b/a/b, 3-helical bundle flanked by two 3-stranded meander beta-sheets
- FMN-dependent nitroreductase-like [55468] (1)

core: (alpha-beta-alpha-beta)2; 3 layers a/b/a; antiparallel beta-sheet: 1243
- N-terminal domain of eukaryotic peptide chain release factor subunit 1, ERF1 [55480] (1)

alpha-beta-alpha(2)-beta(3)-alpha; 3 layers a/b/a; antiparallel beta-sheet: 4123
- Zincin-like [55485] (2)

contains mixed beta sheet with connection over free side of the sheet
- SH2-like [55549] (1)

3 layers: a/b/a; antiparallel beta-sheet of 5 strands is flaked by two helices
- HPr-like [55593] (2)

beta-alpha-beta(2)-alpha-beta-alpha; 2 layers: a/b; antiparallel sheet 1423
- TrkA C-terminal domain-like [116725] (1)

beta-X-beta(2)-X-beta-alpha; pseudo barrel capped by helix at one end; topological similarity to the HPr-like fold
- Hypothetical protein YjiA, C-terminal domain [90001] (1)

beta-alpha-beta(4)-alpha; 2 layers: a/b; antiparallel sheet 15234; topological similarity to the HPr-like fold
- YggU-like [69785] (1)

beta(2)-loop-alpha-beta(2)-alpha; 2 layers: a/b; antiparallel sheet 1243; some similarity to the Homing endonuclease-like fold
- Homing endonuclease-like [55603] (2)

alpha-beta(2)-alpha-beta(2)-alpha; 2 layers: a/b; antiparallel sheet 1243
- T-fold [55619] (2)

beta(2)-alpha(2)-beta(2); 2 layers: alpha/beta; antiparallel sheet 1234
tunnel-shaped: its known members form wide oligomeric barrels different sizes
- Cell cycle regulatory proteins [55636] (1)

beta(2)-alpha(2)-beta(2); 2 layers: alpha/beta; antiparallel sheet 1243
can form strand-exchange dimers
- beta-lactamase-inhibitor protein, BLIP [55647] (1)

alpha(2)-beta(4); 2 layers: alpha/beta
- Ribosomal protein L9 C-domain [55652] (1)

alpha-beta-alpha(2)-beta(2); 2 layers: alpha/beta
- L9 N-domain-like [55657] (1)

beta(2)-alpha-beta-alpha; 3 layers: alpha/beta/alpha
- Tombusvirus P19 core protein, VP19 [103144] (1)

beta(2)-alpha-beta(2)-alpha; 2 layers: alpha/beta; antiparallel sheet: order 2134
- Ribonuclease PH domain 2-like [55665] (1)

beta(2)-alpha-beta(2)-alpha; 3 layers: alpha/beta/alpha; antiparallel sheet: order 2134
- Regulatory factor Nef [55670] (1)

alpha(2)-beta(4)-alpha; 3 layers: alpha/beta/alpha
- CytB endotoxin-like [55675] (1)

core: beta-alpha(2)-beta-alpha(2)-beta(4); 3 layers: a/b/a
- Class II aaRS and biotin synthetases [55680] (1)

contains large mixed beta-sheet
- Subdomain of clathrin and coatomer appendage domain [55710] (1)

beta-alpha-beta-alpha-beta(4)-alpha; 3 layers: a/b/a; bifurcated antiparallel beta-sheet
- Sterol carrier protein, SCP [55717] (1)

alpha-beta(3)-(crossover)-beta-(alpha)-beta; 3 layers: a/b/a; antiparallel beta-sheet of 5 strands; order: 32145
- Ta1353-like [103164] (1)

core: beta-alpha-beta(2)-alpha-beta-alpha-beta; 3 layers: a/b/a; antiparallel beta-sheet of 5 strands; order: 51423;
- Mog1p/PsbP-like [55723] (1)

(beta-hairpin)-beta(3)-alpha-beta(4)-alpha; 3 layers: a/b/a; antiparallel beta-sheet of 7 strands; order: 1237654
- Acyl-CoA N-acyltransferases (Nat) [55728] (1)

3 layers: a/b/a; contains mixed beta-sheet
- Gelsolin-like [55752] (2)

3 layers: a/b/a; contains mixed beta-sheet
- PHP14-like [143723] (1)

beta(3)-alpha-beta(2)-alpha-beta; 3 layers, a/b/a; mixed beta-sheet, half-barrel, order: 132456; strands 2 and 5 are antiparallel to the rest
- Profilin-like [55769] (9)

core: 2 alpha-helices and 5-stranded antiparallel sheet: order 21543; 3 layers: alpha/beta/alpha
- Ligand-binding domain in the NO signalling and Golgi transport [111125] (1)

an N-terminal helical bundle and the C-terminal alpha-beta(2)-alpha-beta(2) subdomain enclose a ligand-binding cavity
- Phage tail protein-like [143748] (1)

alpha-beta-X-beta(2)-alpha-beta(2); 2 layers: a/b; mixed beta-sheet: order 12354, strands 1 and 2 are parallel
- PR-1-like [55796] (1)

alpha-beta-alpha-beta-alpha(2)-beta(2); 3 layers, alpha/beta/alpha; mixed sheet: order 1342
- Phoshotransferase/anion transport protein [55803] (1)

beta-alpha(2)-beta(3)-alpha(3); 3 layers, alpha/beta/alpha; mixed sheet: order 1342; loop crossing
- Nudix [55810] (1)

beta(2)-alpha-beta(3)-alpha; 3 layers: alpha/beta/alpha; mixed sheet
contains beta-grasp motif
- 5'-nucleotidase (syn. UDP-sugar hydrolase), C-terminal domain [55815] (1)

core: alpha-beta(2)-alpha-beta(2)-alpha-beta; 3 layers; mixed sheet: order 31425
- YrdC/RibB [55820] (1)

core: alpha-beta(2)-alpha-beta-alpha(2)-beta(2)-alpha-beta-alpha-beta; 3 layers; mixed twisted sheet of 7 strands; order 7126354; strands 7 and 1 are parallel to each other
- GIY-YIG endonuclease [82770] (1)

beta(2)-alpha(2)-beta-alpha-(beta); strand 4 is very short; 3 layers; antiparallel (mixed) beta-sheet; order 312(4)
- YbaK/ProRS associated domain [55825] (1)

core: alpha-beta-alpha-beta(2)-(alpha-beta)2-alpha-beta(2)-alpha-beta; 3 layers; bifurcated mixed sheet
- Thymidylate synthase/dCMP hydroxymethylase [55830] (1)

contains large mixed beta-sheet
- Thymidylate synthase-complementing protein Thy1 [69795] (1)

complex alpha+beta fold; contains antiparallel 5-stranded beta-sheet: order 12354
- N-acetylmuramoyl-L-alanine amidase-like [55845] (1)

contains mixed beta-sheet
- Cytochrome b5-like heme/steroid binding domain [55855] (1)

beta-alpha-beta(2)-alpha(1,2)-(beta)-alpha(2)-beta; 3 layers: a/b/a; antiparallel beta-sheet, order: 1532(4)
- DUSP-like [143790] (1)

alpha-beta-alpha-X-beta-alpha-beta; three-helical bundle capped at one end by antiparallel beta-sheet, order: 213
- DNA topoisomer