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
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
Representatives:
e3j7a61[6:6-48] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
40S ribosomal protein eS30 ; ELECTRON MICROSCOPY
e8br3SEE1[SEE:3-58] Image Pymol Jmol Links: PDB, SCOP, CATH
e8btkAD1[AD:77-133] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
40S ribosomal protein S30 ; ELECTRON MICROSCOPY
e8bsiSj1[Sj:1-67] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
40S ribosomal protein S30 ; ELECTRON MICROSCOPY
e8bsjSj1[Sj:1-67] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
40S ribosomal protein S30 ; ELECTRON MICROSCOPY
e8btdSj1[Sj:1-67] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein S30 ; ELECTRON MICROSCOPY
e8btrSj1[Sj:1-67] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein S30 ; ELECTRON MICROSCOPY
e7z3nSe1[Se:6-45] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
40S ribosomal protein S30 ; ELECTRON MICROSCOPY
e7z3oSe1[Se:6-45] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
40S ribosomal protein S30 ; ELECTRON MICROSCOPY
e8eubBe1[Be:2-61] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8ccs61[6:7-59] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
40S ribosomal protein S30-A ; ELECTRON MICROSCOPY
e8t4se1[e:4-59] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8ppke1[e:75-133] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Small ribosomal subunit protein eS30 ; ELECTRON MICROSCOPY
e8auvM1[M:2-60] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
eS30 (40S ribosomal protein S30) ; ELECTRON MICROSCOPY
e8b2lM11[M1:2-60] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
40S ribosomal protein S30 ; ELECTRON MICROSCOPY
e8p5dSEE1[SEE:3-58] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8p2kAD1[AD:77-133] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
40S ribosomal protein S30 ; ELECTRON MICROSCOPY
e8bhff31[f3:76-132] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8a98Se1[Se:7-65] Image Pymol Jmol Links: PDB, SCOP, CATH
40S ribosomal protein S30 ; ELECTRON MICROSCOPY
e8q5if1[f:6-61] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
; ELECTRON MICROSCOPY
e5wyjSf1[Sf:23-52] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
40S ribosomal protein S30-A ; ELECTRON MICROSCOPY
e5wykSf1[Sf:23-52] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
40S ribosomal protein S30-A ; ELECTRON MICROSCOPY
e6rm3SEE1[SEE:4-59] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
eS30 ; ELECTRON MICROSCOPY
e5xyie1[e:8-49] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
40S ribosomal protein S30 ; ELECTRON MICROSCOPY
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