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
Representatives:
e4w8vA1[A:102-340] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR system Cmr subunit Cmr6 ; X-RAY DIFFRACTION 2.15Å
e4l6uA1[A:1-200] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Putative uncharacterized protein ; X-RAY DIFFRACTION 2.5Å
e4l6uB2[B:1-198] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Putative uncharacterized protein ; X-RAY DIFFRACTION 2.5Å
e4w8zA1[A:1-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR system Cmr subunit Cmr1-1 ; X-RAY DIFFRACTION 2.7Å
e4w8vB1[B:102-339] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR system Cmr subunit Cmr6 ; X-RAY DIFFRACTION 2.15Å
e4qtsA1[A:1-262] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR type III-associated RAMP protein Csm4 ; X-RAY DIFFRACTION 3.1Å
e6ifkB1[B:2-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Type III-A CRISPR-associated RAMP protein Csm4 ; ligands: ANP ; ELECTRON MICROSCOPY
e6ifyB2[B:2-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Type III-A CRISPR-associated RAMP protein Csm4 ; ELECTRON MICROSCOPY
e6ig0B2[B:2-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Type III-A CRISPR-associated RAMP protein Csm4 ; ligands: ATP ; ELECTRON MICROSCOPY
e6ifnB1[B:2-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Type III-A CRISPR-associated RAMP protein Csm4 ; X-RAY DIFFRACTION 2.9Å
e6nudI2[I:3-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR type III-associated RAMP protein Csm4 ; ligands: ATP ; ELECTRON MICROSCOPY
e6nueI2[I:3-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR type III-associated RAMP protein Csm4 ; ligands: ATP ; ELECTRON MICROSCOPY
e6xn7B1[B:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR-associated protein Csm4 ; ELECTRON MICROSCOPY
e6xn3B1[B:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR-associated protein Csm4 ; ELECTRON MICROSCOPY
e6xn4B2[B:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR-associated protein Csm4 ; ELECTRON MICROSCOPY
e6xn5B1[B:1-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR-associated protein Csm4 ; ELECTRON MICROSCOPY
e7uzwH2[H:5-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR system Cms protein Csm4 ; ELECTRON MICROSCOPY
e7uzxH1[H:5-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR system Cms protein Csm4 ; ELECTRON MICROSCOPY
e7uzyH1[H:5-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR system Cms protein Csm4 ; ELECTRON MICROSCOPY
e7uzzH2[H:5-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR system Cms protein Csm4 ; ELECTRON MICROSCOPY
e7v00H2[H:5-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR system Cms protein Csm4 ; ligands: ATP ; ELECTRON MICROSCOPY
e7v01H1[H:5-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR system Cms protein Csm4 ; ligands: ATP ; ELECTRON MICROSCOPY
e7v02H2[H:5-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR system Cms protein Csm4 ; ELECTRON MICROSCOPY
e8do6B1[B:5-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e6ifuG1[G:2-79,G:104-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Type III-A CRISPR-associated RAMP protein Csm4 ; ELECTRON MICROSCOPY
e6ifnH1[H:3-357] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Type III-A CRISPR-associated RAMP protein Csm5 ; X-RAY DIFFRACTION 2.9Å
e6iqwF1[F:2-336,F:381-396] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csm5 ; ELECTRON MICROSCOPY
e6muuF1[F:1-397] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Uncharacterized protein Csm5 ; ELECTRON MICROSCOPY
e6ifkH1[H:3-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Type III-A CRISPR-associated RAMP protein Csm5 ; ELECTRON MICROSCOPY
e6iflH1[H:3-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Type III-A CRISPR-associated RAMP protein Csm5 ; ELECTRON MICROSCOPY
e6ifrH1[H:3-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Type III-A CRISPR-associated RAMP protein Csm5 ; ELECTRON MICROSCOPY
e6ifuH1[H:3-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Type III-A CRISPR-associated RAMP protein Csm5 ; ELECTRON MICROSCOPY
e6ifyH1[H:3-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Type III-A CRISPR-associated RAMP protein Csm5 ; ELECTRON MICROSCOPY
e6ifzH1[H:3-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Type III-A CRISPR-associated RAMP protein Csm5 ; ELECTRON MICROSCOPY
e6ig0H1[H:3-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Type III-A CRISPR-associated RAMP protein Csm5 ; ELECTRON MICROSCOPY
e6murF1[F:1-397] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Uncharacterized protein ; ELECTRON MICROSCOPY
e6musF1[F:1-397] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Uncharacterized protein Csm5 ; ELECTRON MICROSCOPY
e6mutF1[F:1-397] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Uncharacterized protein Csm5 ; ELECTRON MICROSCOPY
e6ldnA1[A:3-360,A:383-396] Image Pymol Jmol Links: PDB, SCOP, CATH
Csm5 ; X-RAY DIFFRACTION 2.6Å
e7jhye1[e:18-181,e:205-265] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csf2 (Cas7) ; ELECTRON MICROSCOPY
e7jhyd1[d:18-181,d:205-265] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csf2 (Cas7) ; ELECTRON MICROSCOPY
e7jhyc1[c:18-181,c:205-265] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csf2 (Cas7) ; ELECTRON MICROSCOPY
e7jhyf1[f:18-181,f:205-265] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csf2 (Cas7) ; ELECTRON MICROSCOPY
e7jhyb1[b:18-181,b:205-265] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csf2 (Cas7) ; ELECTRON MICROSCOPY
e7jhya1[a:18-181,a:205-265] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csf2 (Cas7) ; ELECTRON MICROSCOPY
e6xn5J1[J:110-352] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR-associated protein Csm5 ; ELECTRON MICROSCOPY
e6xn3J1[J:1-226,J:253-352] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR-associated protein Csm5 ; ELECTRON MICROSCOPY
e6xn4J1[J:1-226,J:253-352] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR-associated protein Csm5 ; ELECTRON MICROSCOPY
e6xn7J1[J:1-226,J:253-352] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR-associated protein Csm5 ; ELECTRON MICROSCOPY
e7uzzE1[E:4-333] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR system Cms protein Csm5 ; ELECTRON MICROSCOPY
e7v00E1[E:4-333] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR system Cms protein Csm5 ; ELECTRON MICROSCOPY
e7v01E1[E:4-333] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR system Cms protein Csm5 ; ELECTRON MICROSCOPY
e7v02E1[E:5-290,E:310-333] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR system Cms protein Csm5 ; ELECTRON MICROSCOPY
e8bmwL1[L:2-202] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR-associated Cas7 paralog (Type III-D) ; ELECTRON MICROSCOPY
e8bmwJ1[J:5-274] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CRISPR-associated Cas7 paralog (Type III-D) ; ELECTRON MICROSCOPY
e8do6H1[H:2-335] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
; ELECTRON MICROSCOPY
e6musE1[E:2-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Uncharacterized protein Csm4 ; ELECTRON MICROSCOPY
e6mutE1[E:2-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Uncharacterized protein Csm4 ; ELECTRON MICROSCOPY
e6muuE1[E:2-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Uncharacterized protein Csm4 ; ELECTRON MICROSCOPY
e6muaB2[B:2-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Uncharacterized protein Csm4 ; X-RAY DIFFRACTION 2.9Å
e6iqwE2[E:2-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csm4 ; ligands: ATP ; ELECTRON MICROSCOPY
e6o7eE1[E:2-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csm4 ; ligands: ANP ; ELECTRON MICROSCOPY
e6o7hE1[E:2-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csm4 ; ligands: G ; ELECTRON MICROSCOPY
e6o7iE1[E:2-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csm4 ; ELECTRON MICROSCOPY
e6o73B2[B:2-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csm4 ; X-RAY DIFFRACTION 2.85Å
e6o74B2[B:2-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csm4 ; ligands: ANP ; X-RAY DIFFRACTION 2.70Å
e6o75B1[B:2-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csm4 ; X-RAY DIFFRACTION 2.60Å
e6o78B2[B:2-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csm4 ; X-RAY DIFFRACTION 2.8Å
e6o79B2[B:2-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csm4 ; X-RAY DIFFRACTION 3.0Å
e6o7bB1[B:2-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csm4 ; X-RAY DIFFRACTION 2.40Å
e6o7dB1[B:2-205] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Csm4 ; ligands: ATP ; X-RAY DIFFRACTION 2.80Å
Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
looks like an elaborated ferredoxin
contains a HTH motif
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