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:
e1d5tA1[A:292-388] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GUANINE NUCLEOTIDE DISSOCIATION INHIBITOR ; X-RAY DIFFRACTION 1.04Å
e1lv0A1[A:292-388] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RAB GDP disossociation inhibitor alpha ; X-RAY DIFFRACTION 2.00Å
e1gndA1[A:292-388] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GUANINE NUCLEOTIDE DISSOCIATION INHIBITOR ; X-RAY DIFFRACTION 1.81Å
e1ukvG2[G:302-399] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SECRETORY PATHWAY GDP DISSOCIATION INHIBITOR ; X-RAY DIFFRACTION 1.5Å
e3cphH1[H:302-399] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RAB GDP-DISSOCIATION INHIBITOR ; X-RAY DIFFRACTION 2.9Å
e3cphG1[G:302-399] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RAB GDP-DISSOCIATION INHIBITOR ; X-RAY DIFFRACTION 2.9Å
e3cpiG1[G:302-399] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Rab GDP-dissociation inhibitor ; X-RAY DIFFRACTION 2.3Å
e3cpiH2[H:302-399] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Rab GDP-dissociation inhibitor ; X-RAY DIFFRACTION 2.3Å
e3cpjG2[G:302-399] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Rab GDP-dissociation inhibitor ; X-RAY DIFFRACTION 2.35Å
e2bcgG1[G:302-399] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Secretory pathway GDP dissociation inhibitor ; X-RAY DIFFRACTION 1.48Å
e3p1wA2[A:305-401] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,
RabGDI protein ; X-RAY DIFFRACTION 1.760Å
e6c87A1[A:295-391] Image Pymol Jmol Links: PDB, SCOP, CATH
Rab GDP dissociation inhibitor alpha ; X-RAY DIFFRACTION 2.600Å
e6c87B2[B:295-391] Image Pymol Jmol Links: PDB, SCOP, CATH
Rab GDP dissociation inhibitor alpha ; X-RAY DIFFRACTION 2.600Å
e6c87C1[C:295-391] Image Pymol Jmol Links: PDB, SCOP, CATH
Rab GDP dissociation inhibitor alpha ; X-RAY DIFFRACTION 2.600Å
e6c87D1[D:295-391] Image Pymol Jmol Links: PDB, SCOP, CATH
Rab GDP dissociation inhibitor alpha ; X-RAY DIFFRACTION 2.600Å
Pseudo 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