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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

X: Immunoglobulin-like beta-sandwich
H: Immunoglobulin-related
T: Common fold of diphtheria toxin/transcription factors/cytochrome f
F: Fimbrial_CS1

PF04449

Representatives:

e3f83A3[A:377-530] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fusion of the minor pilin CfaE and major pilin CfaB ; ligands: SO4 ; X-RAY DIFFRACTION 2.1Å

e4y2lA1[A:1-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ligands: IPA ; X-RAY DIFFRACTION 1.746Å

e4y2lB1[B:0-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ligands: CA ; X-RAY DIFFRACTION 1.746Å

e4y2lC1[C:1-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ligands: CA,IPA ; X-RAY DIFFRACTION 1.746Å

e4y2lD1[D:-2-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ligands: IPA ; X-RAY DIFFRACTION 1.746Å

e4y2lE1[E:-2-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ligands: IPA ; X-RAY DIFFRACTION 1.746Å

e4y2lF1[F:-1-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ligands: CA ; X-RAY DIFFRACTION 1.746Å

e4y2nB1[B:-1-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ligands: EDO,MG ; X-RAY DIFFRACTION 2.40Å

e4y2nA1[A:1-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; X-RAY DIFFRACTION 2.40Å

e4y2nC1[C:0-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; X-RAY DIFFRACTION 2.40Å

e4y2oB1[B:-7-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ligands: NI ; X-RAY DIFFRACTION 2.32Å

e4hjiA1[A:12-165] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CS1 fimbrial subunit A ; ligands: IMD ; X-RAY DIFFRACTION 1.60Å

e3f84A2[A:1-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; X-RAY DIFFRACTION 2.1Å

e3f84A1[A:149-302] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; X-RAY DIFFRACTION 2.1Å

e3f84B1[B:149-307] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; X-RAY DIFFRACTION 2.1Å

e3f84B2[B:1-148] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; X-RAY DIFFRACTION 2.1Å

e3f85A7[A:151-304] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

homo trimeric fusion of CFA/I fimbrial subunits B ; ligands: MG ; X-RAY DIFFRACTION 2.1Å

e3f85A8[A:302-456] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

homo trimeric fusion of CFA/I fimbrial subunits B ; ligands: MG ; X-RAY DIFFRACTION 2.1Å

e3f85A9[A:1-150] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

homo trimeric fusion of CFA/I fimbrial subunits B ; X-RAY DIFFRACTION 2.1Å

e4hjiB1[B:13-165] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CS1 fimbrial subunit A ; ligands: NA ; X-RAY DIFFRACTION 1.60Å

e6nrvA1[A:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e6nrvB1[B:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e6nrvC1[C:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e6nrvD1[D:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e6nrvE1[E:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e6nrvF1[F:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e6nrvG1[G:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e6nrvH1[H:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e6nrvI1[I:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e6nrvJ1[J:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e6nrvK1[K:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e6nrvL1[L:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e6nrvM1[M:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e8ehrA1[A:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e8ehrC1[C:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e8ehrD1[D:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e8ehrE1[E:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e8ehrB1[B:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e8ehrF1[F:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e8ehrG1[G:1-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CFA/I fimbrial subunit B ; ELECTRON MICROSCOPY

e8ehsG1[G:1-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CS17 fimbriae major subunit ; ELECTRON MICROSCOPY

e8ehsA1[A:1-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CS17 fimbriae major subunit ; ELECTRON MICROSCOPY

e8ehsB1[B:1-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CS17 fimbriae major subunit ; ELECTRON MICROSCOPY

e8ehsC1[C:1-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CS17 fimbriae major subunit ; ELECTRON MICROSCOPY

e8ehsD1[D:1-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CS17 fimbriae major subunit ; ELECTRON MICROSCOPY

e8ehsE1[E:1-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CS17 fimbriae major subunit ; ELECTRON MICROSCOPY

e8ehsF1[F:1-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CS17 fimbriae major subunit ; 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.

X: Glycosyl hydrolase domain-like

some similarity with Ig fold

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