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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

X: cradle loop barrel

Refs: Structure 14, 1489-1498; Current opinion in structural biology 18, 358-365

X: PH domain-like
H: PH domain-like
T: PH domain-like
F: PH_14

PF17787 CL0266

Representatives:

e2zkmX1[X:11-141] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-phosphatidylinositol-4,5-bisphosphate phosphodiesterase beta-2 ; X-RAY DIFFRACTION 1.620Å

e3qr0A3[A:11-149] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHOSPHOLIPASE C-BETA (PLC-BETA) ; ligands: GOL ; X-RAY DIFFRACTION 2.0Å

e3qr1A15[A:11-149] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHOSPHOLIPASE C-BETA (PLC-BETA) ; X-RAY DIFFRACTION 3.100Å

e3qr1D12[D:12-150] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHOSPHOLIPASE C-BETA (PLC-BETA) ; X-RAY DIFFRACTION 3.100Å

e4gnkD1[D:10-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-PHOSPHATIDYLINOSITOL 4,5-BISPHOSPHATE PHOSPHODIESTERASE BETA-3 ; X-RAY DIFFRACTION 4.0Å

e4gnkB3[B:11-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-PHOSPHATIDYLINOSITOL 4,5-BISPHOSPHATE PHOSPHODIESTERASE BETA-3 ; X-RAY DIFFRACTION 4.0Å

e2fjuB6[B:11-141] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-phosphatidylinositol-4,5-bisphosphate phosphodiesterase beta 2 ; X-RAY DIFFRACTION 2.20Å

e4qj5B5[B:12-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-3 ; X-RAY DIFFRACTION 3.4Å

e4qj3B5[B:12-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-3 ; X-RAY DIFFRACTION 3.0Å

e3ohmB1[B:12-146] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: ACT

e4qj4B2[B:12-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-3 ; X-RAY DIFFRACTION 3.30Å

e7sq2B4[B:12-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-3 ; ligands: ACT ; X-RAY DIFFRACTION 2.6Å

e8emvA1[A:12-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-3 ; ELECTRON MICROSCOPY

e8emwA3[A:13-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-3 ; ELECTRON MICROSCOPY

e8emxA4[A:13-146] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-3 ; ELECTRON MICROSCOPY

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.

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

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