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
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
Representatives:
e1vi6A1[A:5-197] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2P ; ligands: NA ; X-RAY DIFFRACTION 1.85Å
e4z8c1b1[1b:7-237] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ligands: MG ; X-RAY DIFFRACTION 2.800Å
e7u2j1b1[1b:7-127,1b:157-237] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ligands: MG ; X-RAY DIFFRACTION 2.550Å
e7u2j2b1[2b:7-127,2b:157-237] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; X-RAY DIFFRACTION 2.550Å
e8a22Bb1[Bb:3-268] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uS2m ; ELECTRON MICROSCOPY
e8apnBb1[Bb:3-268] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uS2m ; ELECTRON MICROSCOPY
e8aknC1[C:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e8am9C1[C:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e8ayeB1[B:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e8b0xB1[B:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e8b7yD1[D:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e8eiuB1[B:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e8ekcb1[b:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e7m5dg1[g:3-227] Image Pymol Jmol Links: PDB, SCOP, CATH
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e7q4kAB1[AB:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e8fonQB1[QB:6-240] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; X-RAY DIFFRACTION 3.500Å
e8buub1[b:1-226] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e8a3lB1[B:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e8fizAJ1[AJ:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e8g6wB1[B:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e7uvvb1[b:4-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e7uvwb1[b:4-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e7uvxb1[b:4-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e7uvyb1[b:4-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e7uvzb1[b:4-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e7uw1b1[b:4-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e7ztaS0211[S021:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ligands: CYS,GLN,ZN ; ELECTRON MICROSCOPY
e8fomQB1[QB:4-240] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; X-RAY DIFFRACTION 3.400Å
e8fomXB1[XB:4-240] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; X-RAY DIFFRACTION 3.400Å
e8fonXB1[XB:5-240] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; X-RAY DIFFRACTION 3.500Å
e8crxB1[B:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e8cwoB1[B:1-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e8fr8u1[u:1-228] Image Pymol Jmol Links: PDB, SCOP, CATH
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e8bh6b1[b:6-229] Image Pymol Jmol Links: PDB, SCOP, CATH
; ELECTRON MICROSCOPY
e8cazB1[B:5-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8cgjB1[B:5-117,B:142-226] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e8ftoB1[B:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8sylb1[b:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bf7f1[f:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8eytB1[B:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e7y7cB1[B:4-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8cf1B1[B:90-117,B:138-181] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S2 ; ELECTRON MICROSCOPY
e8apoBb1[Bb:3-268] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
PreviousPseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
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