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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

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

X: LuxS, MPP, ThrRS/AlaRS common domain

looks like an elaborated ferredoxin

X: ClpS-like

contains a HTH motif

X: RelE-like
H: RelE-like
T: RelE-like
F: YoeB_toxin

PF06769 CL0136

Representatives:

e2a6sA1[A:1-83] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Toxin yoeB ; ligands: IPA ; X-RAY DIFFRACTION 1.77Å

e7v5yE1[E:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative mRNA interferase YoeB ; X-RAY DIFFRACTION 2.25Å

e7v5yF1[F:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative mRNA interferase YoeB ; X-RAY DIFFRACTION 2.25Å

e7v5zC1[C:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative mRNA interferase YoeB ; X-RAY DIFFRACTION 1.99Å

e7v5zD1[D:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative mRNA interferase YoeB ; X-RAY DIFFRACTION 1.99Å

e7v6wF1[F:1-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative mRNA interferase YoeB ; X-RAY DIFFRACTION 2.55Å

e7v6wE1[E:0-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative mRNA interferase YoeB ; X-RAY DIFFRACTION 2.55Å

e7v6wM1[M:1-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative mRNA interferase YoeB ; X-RAY DIFFRACTION 2.55Å

e7v6wN1[N:1-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative mRNA interferase YoeB ; X-RAY DIFFRACTION 2.55Å

e2a6rC1[C:1-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Toxin yoeB ; X-RAY DIFFRACTION 2.05Å

e2a6rD1[D:1-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Toxin yoeB ; X-RAY DIFFRACTION 2.05Å

e2a6rF1[F:1-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Toxin yoeB ; X-RAY DIFFRACTION 2.05Å

e2a6sD1[D:1-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Toxin yoeB ; ligands: IPA ; X-RAY DIFFRACTION 1.77Å

e2a6sC1[C:1-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Toxin yoeB ; ligands: IPA ; X-RAY DIFFRACTION 1.77Å

e2a6sB1[B:1-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Toxin yoeB ; ligands: IPA ; X-RAY DIFFRACTION 1.77Å

e2a6rB1[B:1-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Toxin yoeB ; X-RAY DIFFRACTION 2.05Å

e2a6rE1[E:1-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Toxin yoeB ; X-RAY DIFFRACTION 2.05Å

e2a6rA1[A:1-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Toxin yoeB ; X-RAY DIFFRACTION 2.05Å

e2a6qE1[E:1-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Toxin yoeB ; X-RAY DIFFRACTION 2.03Å

e2a6qF1[F:1-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Toxin yoeB ; X-RAY DIFFRACTION 2.03Å

e3oeiC1[C:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RelK (Toxin Rv3358) ; ligands: FLC ; X-RAY DIFFRACTION 2.1450Å

e3oeiD1[D:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RelK (Toxin Rv3358) ; X-RAY DIFFRACTION 2.1450Å

e3oeiG1[G:3-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RelK (Toxin Rv3358) ; X-RAY DIFFRACTION 2.1450Å

e3oeiH1[H:1-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RelK (Toxin Rv3358) ; X-RAY DIFFRACTION 2.1450Å

e3oeiK1[K:2-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RelK (Toxin Rv3358) ; ligands: FLC ; X-RAY DIFFRACTION 2.1450Å

e3oeiL1[L:2-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RelK (Toxin Rv3358) ; X-RAY DIFFRACTION 2.1450Å

e3oeiO1[O:3-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RelK (Toxin Rv3358) ; X-RAY DIFFRACTION 2.1450Å

e3oeiP1[P:2-85] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RelK (Toxin Rv3358) ; X-RAY DIFFRACTION 2.1450Å

e4bybY1[Y:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4bybZ1[Z:101-184] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4bydY1[Y:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4bydZ1[Z:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4v8xAY1[AY:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TOXIN OF THE YOEB-YEFM TOXIN-ANTITOXIN SYSTEM ; X-RAY DIFFRACTION 3.35Å

e4v8xAZ1[AZ:101-184] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TOXIN OF THE YOEB-YEFM TOXIN-ANTITOXIN SYSTEM ; X-RAY DIFFRACTION 3.35Å

e4v8xCY1[CY:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TOXIN OF THE YOEB-YEFM TOXIN-ANTITOXIN SYSTEM ; X-RAY DIFFRACTION 3.35Å

e4v8xCZ1[CZ:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TOXIN OF THE YOEB-YEFM TOXIN-ANTITOXIN SYSTEM ; X-RAY DIFFRACTION 3.35Å

e6ny6Y1[Y:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Toxin YoeB ; X-RAY DIFFRACTION 3.74Å

e6ny6Z1[Z:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Toxin YoeB ; X-RAY DIFFRACTION 3.74Å

e6otrQY1[QY:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Addiction module toxin, Txe/YoeB family ; ligands: A3P ; X-RAY DIFFRACTION 3.120Å

e6otrQZ1[QZ:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Addiction module toxin, Txe/YoeB family ; X-RAY DIFFRACTION 3.120Å

e6otrXY1[XY:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Addiction module toxin, Txe/YoeB family ; ligands: A3P ; X-RAY DIFFRACTION 3.120Å

e6otrXZ1[XZ:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Addiction module toxin, Txe/YoeB family ; X-RAY DIFFRACTION 3.120Å

e6oxaQY1[QY:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Addiction module toxin, Txe/YoeB family ; X-RAY DIFFRACTION 3.200Å

e6oxaQZ1[QZ:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Addiction module toxin, Txe/YoeB family ; X-RAY DIFFRACTION 3.200Å

e6oxaXY1[XY:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Addiction module toxin, Txe/YoeB family ; X-RAY DIFFRACTION 3.200Å

e6oxaXZ1[XZ:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Addiction module toxin, Txe/YoeB family ; X-RAY DIFFRACTION 3.200Å

e6oxiQY1[QY:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Addiction module toxin, Txe/YoeB family ; X-RAY DIFFRACTION 3.500Å

e6oxiQZ1[QZ:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Addiction module toxin, Txe/YoeB family ; X-RAY DIFFRACTION 3.500Å

e6oxiXY1[XY:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Addiction module toxin, Txe/YoeB family ; X-RAY DIFFRACTION 3.500Å

e6oxiXZ1[XZ:1-84] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Addiction module toxin, Txe/YoeB family ; X-RAY DIFFRACTION 3.500Å

e6n90A1[A:1-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Uncharacterized protein ; X-RAY DIFFRACTION 1.700Å

e6n90B1[B:1-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Uncharacterized protein ; ligands: TEW ; X-RAY DIFFRACTION 1.700Å

e7bwfA1[A:2-88] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

Addiction module antitoxin RelB ; X-RAY DIFFRACTION 1.7Å

e7bwfC1[C:2-88] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

Addiction module antitoxin RelB ; X-RAY DIFFRACTION 1.7Å

e6l8eE1[E:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

YoeB toxin ; X-RAY DIFFRACTION 2.35Å

e6l8eF1[F:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

YoeB toxin ; X-RAY DIFFRACTION 2.35Å

e6l8eM1[M:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

YoeB toxin ; X-RAY DIFFRACTION 2.35Å

e6l8eN1[N:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

YoeB toxin ; X-RAY DIFFRACTION 2.35Å

e6l8fD1[D:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

YoeB ; X-RAY DIFFRACTION 2.40Å

e6l8fC1[C:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

YoeB ; X-RAY DIFFRACTION 2.40Å

e6l8fH1[H:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

YoeB ; X-RAY DIFFRACTION 2.40Å

e6l8fG1[G:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

YoeB ; X-RAY DIFFRACTION 2.40Å

e7cuaA1[A:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

YoeB ; X-RAY DIFFRACTION 1.80Å

e7cuaC1[C:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

YoeB ; ligands: SO4 ; X-RAY DIFFRACTION 1.80Å

e7cuaB1[B:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

YoeB ; ligands: SO4 ; X-RAY DIFFRACTION 1.80Å

e6l8gB1[B:2-88] Image Pymol Jmol Links: PDB, SCOP, CATH

YoeB ; X-RAY DIFFRACTION 1.0Å

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.

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