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
Refs: Structure 14, 1489-1498; Current opinion in structural biology 18, 358-365
Representatives:
e1whiA1[A:1-122] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RIBOSOMAL PROTEIN L14 ; X-RAY DIFFRACTION 1.50Å
e8brmLW1[LW:11-142] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein L23 ; ELECTRON MICROSCOPY
e8bsjLW1[LW:11-142] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein L23 ; ELECTRON MICROSCOPY
e8g5yLV1[LV:8-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L23 ; ligands: MET,MG ; ELECTRON MICROSCOPY
e8g60LV1[LV:8-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uL14 ; ligands: MET,MG,PHE ; ELECTRON MICROSCOPY
e8g61LV1[LV:8-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L23 ; ligands: MET,MG ; ELECTRON MICROSCOPY
e8glpLV1[LV:8-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L23 ; ligands: K,MET,MG ; ELECTRON MICROSCOPY
e8bqdAB1[AB:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L23-A ; ELECTRON MICROSCOPY
e8bqxAB1[AB:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L23-A ; ELECTRON MICROSCOPY
e8hfrV51[V5:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH
60S ribosomal protein L23-A ; ELECTRON MICROSCOPY
e7uooV1[V:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L23-A ; ligands: MG ; ELECTRON MICROSCOPY
e7uqbV1[V:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L23-A ; ligands: MG ; ELECTRON MICROSCOPY
e7uqzV1[V:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L23-A ; ligands: MG ; ELECTRON MICROSCOPY
e7v08V1[V:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L23-A ; ligands: MG ; ELECTRON MICROSCOPY
e8br3LV01[LV0:2-142] Image Pymol Jmol Links: PDB, SCOP, CATH
e8bsiLW1[LW:9-142] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein L23 ; ELECTRON MICROSCOPY
e8btdLW1[LW:8-142] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein L23 ; ELECTRON MICROSCOPY
e8btkBV1[BV:2-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein L23 ; ligands: MG ; ELECTRON MICROSCOPY
e8btrLW1[LW:10-142] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein L23 ; ELECTRON MICROSCOPY
e8g5zLV1[LV:1-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L23 ; ligands: K,MET,MG,PHE ; ELECTRON MICROSCOPY
e8g6jLV1[LV:1-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L23 ; ligands: K,MET,MG,PHE ; ELECTRON MICROSCOPY
e7xnxLV1[LV:10-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L23 ; ligands: MG ; ELECTRON MICROSCOPY
e7xnyLV1[LV:10-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L23 ; ligands: MG ; ELECTRON MICROSCOPY
e8i9rLV1[LV:5-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein l23-like protein ; ELECTRON MICROSCOPY
e8i9tLV1[LV:5-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein l23-like protein ; ELECTRON MICROSCOPY
e8i9vLV1[LV:5-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein l23-like protein ; ELECTRON MICROSCOPY
e8i9wLV1[LV:5-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein l23-like protein ; ELECTRON MICROSCOPY
e8i9xLV1[LV:5-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein l23-like protein ; ELECTRON MICROSCOPY
e8i9yLV1[LV:5-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein l23-like protein ; ELECTRON MICROSCOPY
e8i9zLV1[LV:5-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein l23-like protein ; ELECTRON MICROSCOPY
e8ia0LV1[LV:5-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein l23-like protein ; ELECTRON MICROSCOPY
e7z3nLV1[LV:5-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein l23-like protein ; ligands: MG ; ELECTRON MICROSCOPY
e7z3oLV1[LV:5-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein l23-like protein ; ligands: MG ; ELECTRON MICROSCOPY
e8crxj1[j:1-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
50S ribosomal protein L14 ; ELECTRON MICROSCOPY
e8cvmj1[j:1-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
50S ribosomal protein L14 ; ELECTRON MICROSCOPY
e8fr8U1[U:1-122] Image Pymol Jmol Links: PDB, SCOP, CATH
50S ribosomal protein L14 ; ELECTRON MICROSCOPY
e7xamL1[L:1-122] Image Pymol Jmol Links: PDB, SCOP, CATH
50S ribosomal protein L14 ; ELECTRON MICROSCOPY
e7y41L1[L:1-122] Image Pymol Jmol Links: PDB, SCOP, CATH
50S ribosomal protein L14 ; ELECTRON MICROSCOPY
e8buuK1[K:1-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
50S ribosomal protein L14 ; ELECTRON MICROSCOPY
e8fc11O1[1O:1-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ligands: ARG,MG,MPD ; X-RAY DIFFRACTION 2.500Å
e8t8b1O1[1O:1-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ligands: ARG,MPD ; X-RAY DIFFRACTION 2.650Å
e8fc41O1[1O:1-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ligands: ARG,MG,MPD ; X-RAY DIFFRACTION 2.450Å
e8ev61O1[1O:1-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ligands: AKN,MG ; X-RAY DIFFRACTION 2.946Å
e8cgkj1[j:1-123] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ligands: ACT ; ELECTRON MICROSCOPY
e8camj1[j:1-123] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ligands: ACT ; ELECTRON MICROSCOPY
e8cgvj1[j:1-123] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8sylM1[M:1-123] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bf7H1[H:1-123] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e7y7cj1[j:1-123] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8apoAi1[Ai:3-123] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8oirBS1[BS:31-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
39S ribosomal protein L14, mitochondrial ; ELECTRON MICROSCOPY
e7qi5L1[L:31-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
39S ribosomal protein L14, mitochondrial ; ELECTRON MICROSCOPY
e8anyL1[L:31-145] Image Pymol Jmol Links: PDB, SCOP, CATH
39S ribosomal protein L14, mitochondrial ; ELECTRON MICROSCOPY
e8azwe1[e:10-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ligands: K,MG ; ELECTRON MICROSCOPY
e8b2le31[e3:10-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L23 ; ligands: K,MG ; ELECTRON MICROSCOPY
e8eubAV1[AV:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8q5i61[6:7-137] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
; ligands: MG ; ELECTRON MICROSCOPY
e8ccsH1[H:9-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L23-A ; ligands: MG ; ELECTRON MICROSCOPY
e8p5dLV01[LV0:2-142] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bpoU21[U2:10-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ligands: MG ; ELECTRON MICROSCOPY
e8fl2LG1[LG:2-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8p2kBV1[BV:2-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein L23 ; ligands: MG,UNX ; ELECTRON MICROSCOPY
e8idte1[e:10-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bhfI11[I1:2-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ligands: MG ; ELECTRON MICROSCOPY
e8a98J1[J:11-139] Image Pymol Jmol Links: PDB, SCOP, CATH
Putative 60S ribosomal protein L23 ; ligands: MG ; ELECTRON MICROSCOPY
e8oinBS1[BS:31-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Mitochondrial ribosomal protein L14 ; ELECTRON MICROSCOPY
Previousbeta 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