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:
e2f1fA1[A:2-77] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme III small subunit ; ligands: MG ; X-RAY DIFFRACTION 1.75Å
e2pc6A1[A:2-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Probable acetolactate synthase isozyme III (Small subunit) ; ligands: CA ; X-RAY DIFFRACTION 2.500Å
e2fgcA2[A:28,A:30-104] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
acetolactate synthase, small subunit ; ligands: MG ; X-RAY DIFFRACTION 2.3Å
e2pc6B1[B:2-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Probable acetolactate synthase isozyme III (Small subunit) ; ligands: CA ; X-RAY DIFFRACTION 2.500Å
e2pc6D1[D:2-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Probable acetolactate synthase isozyme III (Small subunit) ; X-RAY DIFFRACTION 2.500Å
e2f1fB1[B:2-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme III small subunit ; X-RAY DIFFRACTION 1.75Å
e2pc6C1[C:2-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Probable acetolactate synthase isozyme III (Small subunit) ; ligands: CA ; X-RAY DIFFRACTION 2.500Å
e5yppE1[E:8-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: PEG,VAL ; X-RAY DIFFRACTION 1.9Å
e5yppA1[A:9-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: PEG,VAL ; X-RAY DIFFRACTION 1.9Å
e5yppB1[B:9-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: PEG,VAL ; X-RAY DIFFRACTION 1.9Å
e5yppC1[C:9-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: PEG,VAL ; X-RAY DIFFRACTION 1.9Å
e5yppD1[D:9-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: PEG,VAL ; X-RAY DIFFRACTION 1.9Å
e5yppF1[F:9-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: ACT,PEG,VAL ; X-RAY DIFFRACTION 1.9Å
e5ypwA1[A:9-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: VAL ; X-RAY DIFFRACTION 2.30Å
e5ypwB1[B:9-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: VAL ; X-RAY DIFFRACTION 2.30Å
e5ypwC1[C:9-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: VAL ; X-RAY DIFFRACTION 2.30Å
e5ypwD1[D:9-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: VAL ; X-RAY DIFFRACTION 2.30Å
e5ypwE1[E:9-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: VAL ; X-RAY DIFFRACTION 2.30Å
e5ypwF1[F:8-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: VAL ; X-RAY DIFFRACTION 2.30Å
e5ypwG1[G:9-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: VAL ; X-RAY DIFFRACTION 2.30Å
e5ypwH1[H:9-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: VAL ; X-RAY DIFFRACTION 2.30Å
e5ypyA1[A:8-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: VAL ; X-RAY DIFFRACTION 1.966Å
e5ypyB1[B:9-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: VAL ; X-RAY DIFFRACTION 1.966Å
e5ypyC1[C:8-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: VAL ; X-RAY DIFFRACTION 1.966Å
e5ypyD1[D:9-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: VAL ; X-RAY DIFFRACTION 1.966Å
e5yumA1[A:8-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; ligands: CO,ILE ; X-RAY DIFFRACTION 2.43Å
e6u60A2[A:296-378] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Prephenate dehydrogenase ; ligands: PO4,TYR ; X-RAY DIFFRACTION 2.100Å
e6u60B2[B:296-378] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Prephenate dehydrogenase ; ligands: PO4,TYR ; X-RAY DIFFRACTION 2.100Å
e6u9hG2[G:307-394] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ELECTRON MICROSCOPY
e6u9hK2[K:307-394] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ELECTRON MICROSCOPY
e6u9hO2[O:307-394] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ELECTRON MICROSCOPY
e6u9hS1[S:307-394] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ELECTRON MICROSCOPY
e6vz8G1[G:317-394] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ligands: VAL ; ELECTRON MICROSCOPY
e6vz8K2[K:317-394] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ligands: VAL ; ELECTRON MICROSCOPY
e6vz8O2[O:317-394] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ligands: VAL ; ELECTRON MICROSCOPY
e6vz8S2[S:317-394] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ligands: VAL ; ELECTRON MICROSCOPY
e6u9hF1[F:87-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ELECTRON MICROSCOPY
e6u9hJ2[J:87-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ELECTRON MICROSCOPY
e6u9hN1[N:87-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ELECTRON MICROSCOPY
e6u9hR2[R:87-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ELECTRON MICROSCOPY
e6vz8F2[F:83-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ligands: VAL ; ELECTRON MICROSCOPY
e6vz8J2[J:83-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ligands: VAL ; ELECTRON MICROSCOPY
e6vz8N2[N:83-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ligands: VAL ; ELECTRON MICROSCOPY
e6vz8R2[R:83-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase small subunit 2, chloroplastic ; ligands: VAL ; ELECTRON MICROSCOPY
e6lpiE1[E:7-95] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; X-RAY DIFFRACTION 2.849Å
e6lpiF1[F:8-96] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; X-RAY DIFFRACTION 2.849Å
e6lpiG1[G:8-95] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; X-RAY DIFFRACTION 2.849Å
e6lpiH1[H:8-95] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Acetolactate synthase isozyme 1 small subunit ; X-RAY DIFFRACTION 2.849Å
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