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
a+b three layersone mainly antiparallel beta-sheet layer sandwiched between two alpha-helix layers




Representatives:
e1xbiA1[A:2-116]
nonrep
Image
Pymol
Jmol Links:
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SCOP,
CATH, PubMed,
DOI
50S ribosomal protein L7Ae ; ligands: EPE ; X-RAY DIFFRACTION 1.44Å
e2bo1A1[A:1-100]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH
50S RIBOSOMAL PROTEIN L30E ; ligands: SO4 ; X-RAY DIFFRACTION 1.7Å
e2aleA1[A:1-126]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH, PubMed,
DOI
NHP2/L7AE FAMILY PROTEIN YEL026W ; ligands: MG ; X-RAY DIFFRACTION 1.8Å
e3j65H1[H:24-256]
nonrep
Image
Pymol
Jmol Links:
PDB,
SCOP,
CATH Obsolete PDB
e8cdlKK1[KK:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8cdrKK1[KK:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8cehKK1[KK:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8cf5KK1[KK:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8cg8KK1[KK:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8cgnKK1[KK:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8civKK1[KK:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8ckuKK1[KK:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8cmjKK1[KK:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8evpAG1[AG:24-253] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8evqAG1[AG:24-253] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8evrAG1[AG:24-253] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8evsAG1[AG:24-253] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8evtAG1[AG:24-253] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8ewbAG1[AG:24-253] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8ewcAG1[AG:24-253] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e5gakK1[K:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e5m1jG51[G5:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e5mc6AA1[AA:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e5tgmL81[L8:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ligands: LEU,OHX,PHE ; X-RAY DIFFRACTION 3.500Å
e5tgml81[l8:24-254] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ligands: LEU,MG,OHX,PHE ; X-RAY DIFFRACTION 3.500Å
e7of1G1[G:24-248] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7oh3G1[G:24-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7ohpG1[G:70-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7ohqG1[G:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7ohrG1[G:50-238] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7ohsG1[G:70-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7ohuG1[G:70-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7ohvG1[G:50-238] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7ohwG1[G:70-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7osaeL81[eL8:24-252] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ligands: MG ; X-RAY DIFFRACTION 3.0Å
e7osmeL81[eL8:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; X-RAY DIFFRACTION 3.0Å
e7rr5LG1[LG:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8aafp1[p:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8agtp1[p:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8agup1[p:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8agvp1[p:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8agwp1[p:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8agxp1[p:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8agzp1[p:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8bipLG1[LG:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8bjqLG1[LG:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e8esqG1[G:50-259] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8 ; ELECTRON MICROSCOPY
e8esrG1[G:50-259] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8 ; ELECTRON MICROSCOPY
e8etcG1[G:51-236] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8 ; ELECTRON MICROSCOPY
e8etiG1[G:52-237] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8 ; ELECTRON MICROSCOPY
e8eugG1[G:23-252] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8 ; ELECTRON MICROSCOPY
e8euiG1[G:23-251] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8 ; ELECTRON MICROSCOPY
e7nacG1[G:46-248] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7r6qG1[G:46-249] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7r7aG1[G:46-248] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7ug6G1[G:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7zpqBG1[BG:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7zrsBG1[BG:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7zs5BI1[BI:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY
e7zuwBG1[BG:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8 ; ELECTRON MICROSCOPY
e7zuxEG1[EG:24-256] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L8-A ; ELECTRON MICROSCOPY

Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
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