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
looks like an elaborated ferredoxin
contains a HTH motif
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
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