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

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

H: Immunoglobulin-related

H: Accessory protein X4 (ORF8, ORF7a)

H: Smr-associated domain

H: C2 domain

H: Dextranase, N-terminal domain

H: Antigen MPT63/MPB63 (immunoprotective extracellular protein)

H: YajI-like

H: Urease, beta-subunit

H: Osmotin-like

H: FAH

H: TRAF domain-like

H: Fungal immunomodulatory protein, FIP

H: Nicotinic receptor ligand binding domain-like

H: Leukocidin-like

H: Ig-like domains in STT3

H: Perfringolysin O beta sandwich domain

H: N-terminal domain in A1 cistron-splicing factor AAR2

H: N-terminal domain in metallo-endopeptidase BACOVA_00663

H: Ig-like domain in tailspike protein

H: Dispersin

H: Ig-like domain in envelope glycoprotein E2

H: N-terminal Ig-like domain in baseplate protein ORF48

H: C-terminal Ig-like domain in baseplate protein ORF48

H: Ig-like domain in hypothetical protein BACOVA_03992

H: Viral chemokine binding protein m3

H: Secreted protein CofJ

H: PUD homologs

H: HCV envelope glycoprotein E2

H: Beta-galactosidase LacA beta-sandwich domain

H: Calcium-dependent cell adhesion molecule-1 C-terminal domain

H: Ig-like domain in endo-beta-N-acetylglucosaminidase F2

H: m04 immunoevasin

H: Csd4 Ig-like domain

H: CBM58

H: Hydrazine synthase alpha subunit middle domain

H: Minor structural protein 5 C-terminal Ig-like domain

H: Immunoglobulin-like domain in paramyxoviruses fusion protein

H: Baseplate wedge protein gp6 Ig-like domain

T: Baseplate wedge protein gp6 Ig-like domain

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.

Representatives:

e5hx2D2[D:171-274] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI