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

X: ISP domain

X: avirulence protein AvrPiz-t homologs

X: N-utilization substance G protein NusG, insert domain

X: Fas apoptotic inhibitory molecule

X: N-terminal domain in envelope glycoprotein E2

X: C-terminal region of envelope glycoprotein E2

X: beta sandwich domain in acetophenone carboxylase (Apc) alpha subunit

X: Composite domain of metallo-dependent hydrolases

X: EscU C-terminal domain-like

X: HSP20-like

X: alpha-Amylase inhibitor tendamistat

X: BTV NS2-like ssRNA-binding domain (N-terminal half of Pfam 04514)

X: Neurophysin II

X: Agglutinin HPA-like

X: jelly-roll

H: Concanavalin A-like

H: Nucleoplasmin-like/VP (viral coat and capsid proteins)

H: Polyhedrin

H: Jelly-roll domain in distal tail protein (Dit)-like proteins

H: TNF-like

H: Acetamidase/Formamidase-like

H: Spermadhesin, CUB domain

H: Latrophilin 1 gal_lectin domain

H: Viral protein domain

H: Calcium-mediated lectin

H: Hypothetical protein TM1070

H: Olfactory marker protein

H: C-terminal domain of mullusc hemocyanin

H: Domain I of tail sheath protein Gp18

H: Lipase/lipooxygenase domain (PLAT/LH2 domain)

H: ER-derived vesicles protein Erv41p lumenal domain

H: Thiamin pyrophosphokinase, substrate-binding domain

H: Double-stranded beta-helix

H: Calcium ATPase, transduction domain A

H: Trp RNA-binding attenuation protein (TRAP)

H: Smp-1-like

H: Jelly-roll domain in membrane penetration protein mu1

H: VPA0735-like

H: Jelly-roll domain in cysteine protease

H: Jelly-roll domain in ADAMTS13

H: DUF1989 family protein

H: Jelly-roll domain in outer capsid glycoprotein VP7

H: Jelly-roll domain in Adenovirus penton base protein

H: Jelly-roll domain in peptidase M60 family

H: Camelysin metallo-endopeptidase-like

H: Galactose-binding domain-like

T: Galactose-binding domain-like

F: Sad1_UNC

F: CE2_N

F: SGBP_B_XBD

F: Ephrin_lbd

F: BcsB

F: NPCBM

F: PepX_C

F: Malectin_like

F: GxDLY

F: CBM_26

F: BPA_C

F: TcA_TcB_BD

Representatives:

e4o9yA5[A:2328-2516] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; X-RAY DIFFRACTION 3.5020Å

e4o9yB2[B:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; X-RAY DIFFRACTION 3.5020Å

e4o9yC3[C:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; X-RAY DIFFRACTION 3.5020Å

e4o9yD2[D:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; X-RAY DIFFRACTION 3.5020Å

e4o9yE2[E:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; X-RAY DIFFRACTION 3.5020Å

e4o9yF4[F:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; X-RAY DIFFRACTION 3.5020Å

e4o9yG4[G:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; X-RAY DIFFRACTION 3.5020Å

e4o9yH3[H:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; X-RAY DIFFRACTION 3.5020Å

e4o9yI8[I:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; X-RAY DIFFRACTION 3.5020Å

e4o9yJ7[J:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; X-RAY DIFFRACTION 3.5020Å

e6h6fA3[A:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e6h6fB6[B:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e6h6fC4[C:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e6h6fD5[D:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e6h6fE4[E:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e6rw6A1[A:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e6rw6B1[B:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e6rw6C1[C:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e6rw6D5[D:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e6rw6E8[E:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e6rw9A4[A:2293-2469] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Insecticidal toxin protein TcdA4 ; ELECTRON MICROSCOPY

e6rw9B4[B:2293-2469] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Insecticidal toxin protein TcdA4 ; ELECTRON MICROSCOPY

e6rw9C4[C:2293-2469] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Insecticidal toxin protein TcdA4 ; ELECTRON MICROSCOPY

e6rw9D4[D:2293-2469] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Insecticidal toxin protein TcdA4 ; ELECTRON MICROSCOPY

e6rw9E4[E:2293-2469] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Insecticidal toxin protein TcdA4 ; ELECTRON MICROSCOPY

e6rwaA5[A:2198-2381] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA4 ; ELECTRON MICROSCOPY

e6rwaB5[B:2198-2381] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA4 ; ELECTRON MICROSCOPY

e6rwaC5[C:2198-2381] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA4 ; ELECTRON MICROSCOPY

e6rwaD5[D:2198-2381] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA4 ; ELECTRON MICROSCOPY

e6rwaE5[E:2198-2381] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA4 ; ELECTRON MICROSCOPY

e6h6eA6[A:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e6h6eB1[B:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e6h6eC5[C:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e6h6eD6[D:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e6h6eE2[E:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e5lkiB3[B:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e5lkiC3[C:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e5lkiA4[A:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e5lkiD4[D:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e5lkiE4[E:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TcdA1 ; ELECTRON MICROSCOPY

e6l7eA5[A:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH

TcdA1 ; ELECTRON MICROSCOPY

e6l7eB1[B:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH

TcdA1 ; ELECTRON MICROSCOPY

e6l7eC5[C:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH

TcdA1 ; ELECTRON MICROSCOPY

e6l7eD1[D:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH

TcdA1 ; ELECTRON MICROSCOPY

e6l7eE1[E:2328-2516] Image Pymol Jmol Links: PDB, SCOP, CATH

TcdA1 ; ELECTRON MICROSCOPY

e6l7iA1[A:2327-2516] Image Pymol Jmol Links: PDB, SCOP, CATH

TcdA1 ; ELECTRON MICROSCOPY

e6l7iB1[B:2327-2516] Image Pymol Jmol Links: PDB, SCOP, CATH

TcdA1 ; ELECTRON MICROSCOPY

e6l7iC1[C:2327-2516] Image Pymol Jmol Links: PDB, SCOP, CATH

TcdA1 ; ELECTRON MICROSCOPY

e6l7iD1[D:2327-2516] Image Pymol Jmol Links: PDB, SCOP, CATH

TcdA1 ; ELECTRON MICROSCOPY

e6l7iE1[E:2327-2516] Image Pymol Jmol Links: PDB, SCOP, CATH

TcdA1 ; ELECTRON MICROSCOPY

e6rw8A3[A:2344-2523] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

A component of insecticidal toxin complex (Tc) ; ELECTRON MICROSCOPY

e6rw8B3[B:2344-2523] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

A component of insecticidal toxin complex (Tc) ; ELECTRON MICROSCOPY

e6rw8C3[C:2344-2523] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

A component of insecticidal toxin complex (Tc) ; ELECTRON MICROSCOPY

e6rw8D3[D:2344-2523] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

A component of insecticidal toxin complex (Tc) ; ELECTRON MICROSCOPY

e6rw8E3[E:2344-2523] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

A component of insecticidal toxin complex (Tc) ; ELECTRON MICROSCOPY

e6yewA3[A:2293-2469] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Insecticidal toxin protein ; ELECTRON MICROSCOPY

e6yewB3[B:2293-2469] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Insecticidal toxin protein ; ELECTRON MICROSCOPY

e6yewC3[C:2293-2469] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Insecticidal toxin protein ; ELECTRON MICROSCOPY

e6yewD3[D:2293-2469] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Insecticidal toxin protein ; ELECTRON MICROSCOPY

e6yewE3[E:2293-2469] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Insecticidal toxin protein ; ELECTRON MICROSCOPY

e6yeyA3[A:2344-2523] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

A component of insecticidal toxin complex (Tc) ; ELECTRON MICROSCOPY

e6yeyB3[B:2344-2523] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

A component of insecticidal toxin complex (Tc) ; ELECTRON MICROSCOPY

e6yeyC3[C:2344-2523] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

A component of insecticidal toxin complex (Tc) ; ELECTRON MICROSCOPY

e6yeyD3[D:2344-2523] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

A component of insecticidal toxin complex (Tc) ; ELECTRON MICROSCOPY

e6yeyE3[E:2344-2523] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

A component of insecticidal toxin complex (Tc) ; ELECTRON MICROSCOPY

F: BgaA-like_CBM

F: CBM-like_2

F: Glyco_hydro_2_N

F: Bac_rhamnosid

F: Bac_rhamnosid_N

F: CBM_35

F: Reelin_subrepeat-B

F: Calpain_III

F: P_proprotein

F: CBM_6

F: CBM_17_28

F: CBM_11

F: Allantoicase

F: PITH

F: 7TMR-DISMED2

F: CIA30

F: PINIT

F: DUF4465

F: DUF5077

F: GH115_C

F: Cry1Ac_D5

F: DUF5625

F: LAMININ_IV_B

F: AGA-YXIM_GBD

F: BetaGal_ABD2

F: Malectin

F: GOLD_2

F: CBM65_1

F: BetaGal_ABD_1

F: Laminin_B

F: EMP24_GP25L

F: XRCC1_N

F: CBM_4_9

F: ANAPC10

F: CBM_15

F: PPC

F: FBA

F: YpM

F: CBM-like

F: DUF5000

F: CBM60

F: GalBD_like

F: Lectin_like

F: Mann_GBD_bact

F: TPPII_GBD

F: Cry1Ac_dom-VII

F: GH101_dom-5

F: RhaB_D2

F: CBM30

F: PCMD

F: F5_F8_type_C

F: Clenterotox

F: BetaGal_gal-bd

F: Endotoxin_C

F: PAW

F: FlhE

F: NADase_NGA

F: PA-IL

F: Lyase_N

F: CBM27

F: Arabino_trans_C

F: Thioredoxin_10

F: Glft2_N

F: Glyco_hydro_78_N

F: Glce_b_sandwich

F: CFA20_dom

F: CBM77

F: DUF5620

F: DUF6805

F: PirA-like

F: G7C_GBD

F: DUF6947

F: Cbm74

F: F5_F8_type_C_2

F: CBM_4_9_1

F: Glyco_hydro_2_N2

F: Ape1_N

F: CatAgl_D1

F: HpiC1-like

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.

H: Histone H3 binding protein ORF158L

H: Jelly-roll domain in Zinc finger protein ZPR1

H: MopE

H: Jelly-roll domain in minor capsid protein

H: Protein CLP1 jelly-roll domain

H: hypothetical protein lpg0956 N-terminal domain

H: TerD

H: DUF4425

H: Soluble domain of MmpS4

H: PHR domain

H: Protein Hikeshi jelly-roll domain

H: ssRNA positive-strand viruses coat protein P (projecting) domain

H: Major structural protein 1 jelly-roll domain

H: Carbohydrate-binding module 64 (CBM64)

H: PTX/LNS-Like (PLL) domain

H: Surface adhesin CshA non-repetitive domain 2

H: TssK C-terminal domain

X: putative carbohydrate-binding module of GH2

X: Flagellar hook-associated protein 1 beta-sandwich domains

X: gp11/flagellar cap protein FliD insertion domain

X: Apc (acetophenone carboxylase) beta subunit C-terminal domain

X: beta-sandwich domain in YqeH GTPase

X: Putative transcription regulator R01717-related

X: Amiloride-sensitive cation channel 2

X: Major vault protein (MVP) structural repeat domain

X: Head-binding domain of phage P22 tailspike protein

X: Putative tailspike protein Orf210 N-terminal domain

X: Tail sheath protein beta-sandwich domain

X: 26S proteasome subunit Rpn2 C-terminal domain

X: beta sandwich domain in YacF-like proteins

X: Ecotin, trypsin inhibitor

X: Soluble secreted chemokine inhibitor, VCCI

X: hypothetical protein BT_3535

X: N-terminal domain of BT_2081-like

X: C protein alpha-antigen beta-sandwich domain

X: Baseplate structural protein gp6 C-terminal domain II

X: Immunoglobulin-like beta-sandwich

X: Mucin-like region of HAP2

X: N-terminal half of TgpA periplasmic domain

X: Starch specific carbohydrate-binding modules

X: Insertion domain in tetravirus coat protein

X: hypothetical protein BA_2335

X: Lactococcin 972

X: Arginine methyltransferase oligomerization subdomain

X: Cupredoxin-like

X: WSSV envelope protein-like

X: Baculovirus p35 protein-related

X: Ig-like domain in anthrax protective antigen

X: N-terminal beta-sandwich domain in anthrax protective antigen

X: Middle beta-sandwich domain in anthrax protective antigen

X: N-terminal domain in a putative lipoprotein BACOVA_00967

X: C-terminal domain in a putative lipoprotein BACOVA_00967

X: Cellulose-binding protein CttA N-terminal domain

X: Ig-like domain in putative lipoprotein BF3042-related proteins

X: Domain in virus attachment proteins

X: VP4 membrane interaction domain

X: Mucin-binding protein domain

X: C-terminal domain of envelope glycoprotein H

X: Glycosyl hydrolase domain-like

some similarity with Ig fold

X: Putative glucosidase YicI, C-terminal domain

X: Putative anti-sigma factor BDI_1681 N-terminal domain

X: Immunomodulator A46 N-terminal domain

X: TraO N-terminal domain

X: Beta-galactosidase LacA, domain 3

X: Lactophage receptor-binding protein N-terminal domain-like

X: gamma-Crystallin-like

X: C-terminal domain of viral protein A26

X: Ice-binding adhesin

X: Third domain in metalloprotease StcE

X: Herpesvirus nuclear egress complex subunit M50 N-terminal domain

X: SMAD/FHA domain

X: Heme-binding protein HmuY-related

X: NAD kinase beta sandwich domain-like

X: Epsilon subunit of F1F0-ATP synthase-N

X: CPE0013-like

X: Penicillin-binding protein associated domain

X: E2 regulatory, transactivation domain

X: Flagellar hook protein flgE D2 domain-like

X: Flagellar hook subunit protein FlgE beta sandwich domain

X: HSP40/DnaJ peptide-binding domain

X: DNA-entry nuclease inhibitor

X: Heat shock protein 70kD (HSP70), peptide-binding domain

X: gp9 N-terminal domain-like

X: gp9 C-terminal domain-like

X: Hypothetical Protein lmo2686

X: ENV polyprotein, receptor-binding domain

X: C-terminal domain in YerB-like proteins

X: Nascent polypeptide-associated complex (NAC) dimerization domain

X: A putative surface protein

X: P2X purinoceptor

X: Atg29-Atg31

X: Surface cell antigen (sca) N-terminal domain

X: Uncharacterized protein BAS0735

X: SARAF luminal domain

X: Piezo CTL2 domain

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

special