Evolutionary classification of protein domain structures
alpha arraysalpha-helix arrays with mainly perpendicular helices
Representatives:
e2ahqA1[A:1-67] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RNA polymerase sigma factor RpoN ; SOLUTION NMR
e2o9lA2[A:1-63] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RNA polymerase sigma factor RpoN ; SOLUTION NMR
e2o8kA2[A:14-76] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RNA polymerase sigma factor RpoN ; SOLUTION NMR
e2mt3A1[A:414-474] Image Pymol Jmol Links: PDB, SCOP, CATH
RNA polymerase sigma-54 factor ; SOLUTION NMR
e5ui5I2[I:322-398] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RNA polymerase sigma factor RpoN ; X-RAY DIFFRACTION 3.400Å
e5ui5V2[V:322-397] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RNA polymerase sigma factor RpoN ; X-RAY DIFFRACTION 3.400Å
e6gh5M2[M:414-473] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RNA polymerase sigma-54 factor,RNA polymerase sigma-54 factor,RNA polymerase sigma-54 factor,RNA polymerase sigma-54 factor,RNA polymerase sigma-54 factor ; ELECTRON MICROSCOPY
e6gh6M1[M:414-473] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RNA polymerase sigma-54 factor,RNA polymerase sigma-54 factor,RNA polymerase sigma-54 factor,RNA polymerase sigma-54 factor,RNA polymerase sigma-54 factor ; ELECTRON MICROSCOPY
Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
lacks the N-terminal helix, circularly permuted wing
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
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