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X - Possible homology level

H - Homology level

T - Topology level

F - Family level

* - Provisional representative


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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

X: LuxS, MPP, ThrRS/AlaRS common domain

looks like an elaborated ferredoxin

X: ClpS-like

contains a HTH motif

X: FAD-linked reductases, C-terminal domain-like
H: FAD-linked reductases-C
T: FAD-linked reductases-C
F: GDI

PF00996 CL0063

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

F: Unmapped domains

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