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
Representatives:
e3jsyA2[A:114-189] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acidic ribosomal protein P0 homolog ; X-RAY DIFFRACTION 1.6Å
e5darB2[B:114-124,B:169-189] Image Pymol Jmol Links: PDB, SCOP, CATH
50S ribosomal protein L10 ; X-RAY DIFFRACTION 2.9Å
e8evqV2[V:108-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8evrV1[V:108-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8evsV1[V:108-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8ewbV1[V:108-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e3jsyB2[B:114-189] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acidic ribosomal protein P0 homolog ; X-RAY DIFFRACTION 1.6Å
e3j21k4[k:110-185] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e3j44k2[k:110-185] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e4hubG1[G:112-186] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e3j61q2[q:113-185] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e3j92s1[s:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uL10 ; ELECTRON MICROSCOPY
e3izrs2[s:113-185] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e4v4nAk1[Ak:110-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
50S ribosomal protein P0/L10E ; ELECTRON MICROSCOPY
e4v6uBk1[Bk:110-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acidic ribosomal protein P0 homolog ; ELECTRON MICROSCOPY
e4v7eCq2[Cq:113-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e4v3pLs2[Ls:113-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e4v7fn1[n:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
mRNA turnover protein 4 ; ELECTRON MICROSCOPY
e3j65n2[n:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e5an9C2[C:109-181] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ACIDIC RIBOSOMAL PROTEIN P0 ; ELECTRON MICROSCOPY
e5anbC2[C:109-181] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ACIDIC RIBOSOMAL PROTEIN P0 ; ELECTRON MICROSCOPY
e5ancC1[C:109-181] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ACIDIC RIBOSOMAL PROTEIN P0 ; ELECTRON MICROSCOPY
e5fl8n2[n:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH
e3jctW2[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e5d8hB1[B:114-189] Image Pymol Jmol Links: PDB, SCOP, CATH
50S ribosomal protein L10 ; X-RAY DIFFRACTION 2.8Å
e5d6gA2[A:114-189] Image Pymol Jmol Links: PDB, SCOP, CATH
50S ribosomal protein L10 ; X-RAY DIFFRACTION 3.2Å
e5darE1[E:114-189] Image Pymol Jmol Links: PDB, SCOP, CATH
50S ribosomal protein L10 ; X-RAY DIFFRACTION 2.9Å
e5jcsn1[n:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e6em5W1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e6elzW1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e6em1W1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e6ft6W1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e6frk62[6:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6ftgs2[s:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6ftis1[s:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6ftjs1[s:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6d90s1[s:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uL10 ; ELECTRON MICROSCOPY
e6d9js2[s:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uL10 ; ELECTRON MICROSCOPY
e6gq1P01[P0:108-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6gqbP02[P0:108-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6gqvP01[P0:108-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6hcfs32[s3:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uL10 ; ELECTRON MICROSCOPY
e6hcjt31[t3:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uL10 ; ELECTRON MICROSCOPY
e6hcms32[s3:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uL10 ; ELECTRON MICROSCOPY
e6hcqt32[t3:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uL10 ; ELECTRON MICROSCOPY
e6mtds2[s:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uL10 ; ELECTRON MICROSCOPY
e6mtes2[s:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uL10 ; ELECTRON MICROSCOPY
e6gz3AK1[AK:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ribosomal protein uL10 ; ELECTRON MICROSCOPY
e6gz4AK1[AK:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ribosomal protein uL10 ; ELECTRON MICROSCOPY
e6gz5AK1[AK:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ribosomal protein uL10 ; ELECTRON MICROSCOPY
e6n8jW2[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e6n8kW2[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e6qklC2[C:109-181] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6r6ps1[s:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6r5qs1[s:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6r6gs1[s:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6r7qs1[s:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6sgcs22[s2:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uL10 ; ELECTRON MICROSCOPY
e6t59s31[s3:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uL10 ; ELECTRON MICROSCOPY
e6uz7Br1[Br:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6zm7Ls2[Ls:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6zmeLs1[Ls:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6zmiLs1[Ls:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6ylxW2[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e6zmoLs2[Ls:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6m62W2[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e6ylgW2[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e6ylhW1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e6ylyW2[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e6xiqP01[P0:108-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RPP0 isoform 1 ; ELECTRON MICROSCOPY
e7bt6W1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7btbW2[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7a01K22[K2:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e6zvkK21[K2:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e7o7yBs1[Bs:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e7nwis2[s:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e7nwgt31[t3:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e7nwhs2[s:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e7o7zBs2[Bs:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e7o80Bs1[Bs:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e7o81Bs2[Bs:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e7of1W1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7oh3W1[W:122-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7ohpW1[W:122-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7ohqW1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7ohrW1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7ohsW1[W:123-226] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7ohtW1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7ohuW1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7ohvW1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7ohwW1[W:122-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7ohyW1[W:122-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7olcLs2[Ls:108-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e7oldLs1[Ls:108-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e7z34W2[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7oyds2[s:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10E ; ELECTRON MICROSCOPY
e7nacW1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7r7aW1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7u0hW2[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7ug6W2[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e8g5zLq1[Lq:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e8g60Lq2[Lq:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uL10 ; ELECTRON MICROSCOPY
e8g6jLq2[Lq:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e8hfrWg2[Wg:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7uooW1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7uqbW1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7uqzW1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7v08W1[W:121-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome assembly factor MRT4 ; ELECTRON MICROSCOPY
e7z3nLs1[Ls:108-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e7z3oLs2[Ls:108-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e8btkBs2[Bs:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e8eubVA1[VA:108-180] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bpoq21[q2:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8p2kBs1[Bs:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S acidic ribosomal protein P0 ; ELECTRON MICROSCOPY
e8bhfe11[e1:110-182] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e4nwbA1[A:121-217] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MRNA TURNOVER PROTEIN 4 ; ligands: SO4 ; X-RAY DIFFRACTION 1.8Å
e3j16G2[G:108-180] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10 ; ELECTRON MICROSCOPY
Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
looks like an elaborated ferredoxin
contains a HTH motif
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