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

H: Baseplate structural protein gp6 C-terminal domain II

T: Baseplate structural protein gp6 C-terminal domain II

F: gp6_C-domII

PF21472

Representatives:

e5hx2D6[D:488-621] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e3h2tA1[A:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; X-RAY DIFFRACTION 3.20Å

e3h2tB1[B:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; X-RAY DIFFRACTION 3.20Å

e3h3wA1[A:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY 12.0Å

e3h3wB1[B:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY 12.0Å

e3h3wC1[C:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY 12.0Å

e3h3wD1[D:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY 12.0Å

e3h3wE1[E:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY 12.0Å

e3h3wF1[F:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY 12.0Å

e3h3wG1[G:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY 12.0Å

e3h3wH1[H:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY 12.0Å

e3h3wI1[I:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY 12.0Å

e3h3wJ1[J:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY 12.0Å

e3h3wK1[K:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY 12.0Å

e3h3wL1[L:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY 12.0Å

e3h3yA1[A:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY

e3h3yB1[B:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY

e3h3yC1[C:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY

e3h3yD1[D:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY

e3h3yE1[E:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY

e3h3yF1[F:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY

e3h3yG1[G:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY

e3h3yH1[H:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY

e3h3yI1[I:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY

e3h3yJ1[J:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY

e3h3yK1[K:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY

e3h3yL1[L:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate structural protein Gp6 ; ELECTRON MICROSCOPY

e5hx2E5[E:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv5A5[A:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv5B6[B:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv5X6[X:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv5Y7[Y:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv5u3[u:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv5v6[v:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv5BH5[BH:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv5BI5[BI:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv5EA6[EA:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv5EB5[EB:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv5GD5[GD:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv5GE5[GE:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv7A6[A:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv7B3[B:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv7Q1[Q:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv7R5[R:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv7g2[g:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv7h2[h:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv7w6[w:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv7x3[x:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv7BF2[BF:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv7BG5[BG:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv7EA6[EA:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

e5iv7EB3[EB:488-621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Baseplate wedge protein gp6 ; ELECTRON MICROSCOPY

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