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
looks like an elaborated ferredoxin
contains a HTH motif
Representatives:
e1wf3A1[A:181-298] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
GTP-binding protein ; ligands: GOL ; X-RAY DIFFRACTION 1.88Å
e1egaA1[A:183-295] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (GTP-BINDING PROTEIN ERA) ; ligands: SO4 ; X-RAY DIFFRACTION 2.4Å
e2uubC2[C:2-106] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S RIBOSOMAL PROTEIN S3 ; X-RAY DIFFRACTION 2.800Å
e1wh9A1[A:1-92] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
40S ribosomal protein S3 ; SOLUTION NMR
e3j9zSC1[SC:1-106] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e5lzcc2[c:1-106] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e5lzdc2[c:1-106] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ligands: MG ; ELECTRON MICROSCOPY
e5lzec2[c:1-106] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e5lzfc2[c:1-106] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e5me0C1[C:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6bu8C1[C:1-106] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6lkqB1[B:1-106] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; X-RAY DIFFRACTION 3.1Å
e6vu3I2[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6vyqI2[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6vyrI1[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6vysI1[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6vytI2[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6vyuI1[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6vywI1[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6vyxI2[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6vyyI1[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6vyzI2[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6vz2I2[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6vz3I1[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6vz5I1[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6vz7I2[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6vzjI2[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6x6tI1[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6x7fI1[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6x7kI2[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6x9qI1[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6xdqI1[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6xdrI1[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6xgfI2[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6xiiI2[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6xijI2[I:2-107] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6yssc2[c:1-106] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6ystc1[c:1-106] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
e6ysuc2[c:1-106] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
30S ribosomal protein S3 ; ELECTRON MICROSCOPY
PreviousPseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
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