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:
e1ad2A2[A:68-159] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RIBOSOMAL PROTEIN L1 ; ligands: MRD,SO4 ; X-RAY DIFFRACTION 1.8Å
e1i2aA2[A:53-148] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
50S RIBOSOMAL PROTEIN L1P ; X-RAY DIFFRACTION 1.825Å
e4d5yu1[u:52-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S RIBOSOMAL PROTEIN UL1 ; ELECTRON MICROSCOPY
e4d67u1[u:52-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S RIBOSOMAL PROTEIN L10A ; ELECTRON MICROSCOPY
e3jctK2[K:106-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e6tb3BT2[BT:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e6y6xLz2[Lz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e6z6lLz2[Lz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e6zmeLz1[Lz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e6zmiLz1[Lz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e6ylgo2[o:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e6ylxK1[K:106-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e6ke6RI1[RI:64-178] Image Pymol Jmol Links: PDB, SCOP, CATH
Ribosome biogenesis protein UTP30 ; ELECTRON MICROSCOPY
e6xiqL11[L1:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RPL1A isoform 1 ; ELECTRON MICROSCOPY
e6ylho1[o:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e6m62K1[K:106-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e6ylyK2[K:239-366] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e6lqmA2[A:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e6lsrA1[A:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e6lu8A2[A:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e6z6mLz1[Lz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e6z6nLz2[Lz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e6zm7Lz2[Lz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e6zmoLz2[Lz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e6oigz1[z:252-347] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e6wooq1[q:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH
uL1 ; ELECTRON MICROSCOPY
e7btbK2[K:106-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e6lqpRI1[RI:64-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome biogenesis protein UTP30 ; ELECTRON MICROSCOPY
e6lquRI2[RI:64-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome biogenesis protein UTP30 ; ELECTRON MICROSCOPY
e6zqaUZ1[UZ:64-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome biogenesis protein UTP30 ; ELECTRON MICROSCOPY
e6zqbUZ2[UZ:64-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome biogenesis protein UTP30 ; ELECTRON MICROSCOPY
e6zqcUZ1[UZ:64-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome biogenesis protein UTP30 ; ELECTRON MICROSCOPY
e7ajtUZ2[UZ:64-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome biogenesis protein UTP30 ; ELECTRON MICROSCOPY
e7a01422[42:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein ; ELECTRON MICROSCOPY
e6zvk421[42:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein ; ELECTRON MICROSCOPY
e7o7yBv2[Bv:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein uL1 ; ELECTRON MICROSCOPY
e7nwgw31[w3:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein ; ELECTRON MICROSCOPY
e7o7zBv1[Bv:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein uL1 ; ELECTRON MICROSCOPY
e7o80Bv2[Bv:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein ; ELECTRON MICROSCOPY
e7o81Bv2[Bv:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein uL1 ; ELECTRON MICROSCOPY
e6xu6Cz2[Cz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a-2 ; ELECTRON MICROSCOPY
e6xu7Cz2[Cz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a-2 ; ELECTRON MICROSCOPY
e6xu8Cz2[Cz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a-2 ; ELECTRON MICROSCOPY
e7d5sRI2[RI:62-185] Image Pymol Jmol Links: PDB, SCOP, CATH
Ribosome biogenesis protein UTP30 ; ELECTRON MICROSCOPY
e7ls1L12[L1:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e7ls2L12[L1:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e7ohpK2[K:105-232] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e7ohqK2[K:105-232] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e7ohxK1[K:106-232] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e7ohsK2[K:106-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e7ohrK2[K:106-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e7ohvK2[K:106-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e7ohwK2[K:106-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e7oydx1[x:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein uL1 ; ELECTRON MICROSCOPY
e7zjxLx1[Lx:58-114,Lx:139-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein ; ELECTRON MICROSCOPY
e7sukSN1[SN:64-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosome biogenesis protein UTP30 ; ELECTRON MICROSCOPY
e7zw0LB2[LB:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e8aafw1[w:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e8agtw1[w:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e8aguw1[w:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e8agvw1[w:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e8agww2[w:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e8agxw1[w:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e8agzw2[w:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e7naca1[a:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein ; ELECTRON MICROSCOPY
e7r7aa1[a:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein ; ELECTRON MICROSCOPY
e7r7ca1[a:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e7u0hK2[K:106-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e7qggCz1[Cz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e7zjwLx2[Lx:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein uL1 ; ELECTRON MICROSCOPY
e8br8Ln1[Ln:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein L10a ; ELECTRON MICROSCOPY
e8brmLn2[Ln:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein L10a ; ELECTRON MICROSCOPY
e8bsiLn1[Ln:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein L10a ; ELECTRON MICROSCOPY
e8bsjLn2[Ln:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein L10a ; ELECTRON MICROSCOPY
e8btdLn2[Ln:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein L10a ; ELECTRON MICROSCOPY
e8btrLn2[Ln:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein L10a ; ELECTRON MICROSCOPY
e8btkBv2[Bv:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein uL1 ; ELECTRON MICROSCOPY
e8g5yLz2[Lz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e8g5zLz1[Lz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uL1 ; ligands: MET,MG,PHE ; ELECTRON MICROSCOPY
e8g60Lz2[Lz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
uL1 ; ELECTRON MICROSCOPY
e8g61Lz2[Lz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e8g6jLz2[Lz:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L10a ; ELECTRON MICROSCOPY
e8bqdBT2[BT:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e8bqxBT2[BT:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e8hfrAs2[As:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH
YEAST 60S ribosomal protein L1-A ; ELECTRON MICROSCOPY
e8e5tK2[K:106-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e8i9rLq1[Lq:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein ; ELECTRON MICROSCOPY
e8i9tLq1[Lq:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein ; ELECTRON MICROSCOPY
e8i9vLq2[Lq:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein ; ELECTRON MICROSCOPY
e8i9wLq1[Lq:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein ; ELECTRON MICROSCOPY
e8i9xLq1[Lq:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein ; ELECTRON MICROSCOPY
e8i9yLq1[Lq:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein ; ELECTRON MICROSCOPY
e8i9zLq2[Lq:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein ; ELECTRON MICROSCOPY
e8ia0Lq1[Lq:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein ; ELECTRON MICROSCOPY
e7uooK1[K:106-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e7uqbK1[K:106-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e7uqzK2[K:106-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e7v08K2[K:106-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Proteasome-interacting protein CIC1 ; ELECTRON MICROSCOPY
e8hkuAL1P1[AL1P:61-156] Image Pymol Jmol Links: PDB, SCOP, CATH
; ELECTRON MICROSCOPY
e8hkyAL1P1[AL1P:61-156] Image Pymol Jmol Links: PDB, SCOP, CATH
; ELECTRON MICROSCOPY
e8hl2AL1P1[AL1P:61-156] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
50S ribosomal protein L1 ; ELECTRON MICROSCOPY
e8hl5AL1P1[AL1P:61-156] Image Pymol Jmol Links: PDB, SCOP, CATH
; ELECTRON MICROSCOPY
e8fl2BB2[BB:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8p2kBv1[Bv:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ribosomal protein uL1 ; ELECTRON MICROSCOPY
e8idyt2[t:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8bhfl11[l1:58-153] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8eubE1[E:57-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e8fkpSL1[SL:88-184] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
; ELECTRON MICROSCOPY
e8ineu1[u:88-184] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
Pseudo 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