title: 5-Stabilized phosphatidylinositol 3,4,5-trisphosphate analogues bind Grp1 PH, inhibit phosphoinositide phosphatases, and block neutrophil migration.
abstract: Metabolically stabilized analogues of PtdIns(3,4,5)P3 have shown long-lived agonist activity for cellular events and selective inhibition of lipid phosphatase activity. We describe an efficient asymmetric synthesis of two 5-phosphatase-resistant analogues of PtdIns(3,4,5)P3, the 5-methylene phosphonate (MP) and 5-phosphorothioate (PT). Furthermore, we illustrate the biochemical and biological activities of five stabilized PtdIns(3,4,5)P3 analogues in four contexts. First, the relative binding affinities of the 3-MP, 3-PT, 5-MP, 5-PT, and 3,4,5-PT3 analogues to the Grp1 PH domain are shown, as determined by NMR spectroscopy. Second, the enzymology of the five analogues is explored, showing the relative efficiency of inhibition of SHIP1, SHIP2, and phosphatase and tensin homologue deleted on chromosome 10 (PTEN), as well as the greatly reduced ability of these phosphatases to process these analogues as substrates as compared to PtdIns(3,4,5)P3. Third, exogenously delivered analogues severely impair complement factor C5a-mediated polarization and migration of murine neutrophils. Finally, the new analogues show long-lived agonist activity in mimicking insulin action in sodium transport in A6 cells.
authors.affiliation: Department of Medicinal Chemistry, The University of Utah, 419 Wakara Way, Suite 205, Salt Lake City, UT 84108-1257, USA.
authors.forename: Honglu
authors.initials: H
authors.lastname: Zhang
authors.forename: Ju
authors.initials: J
authors.lastname: He
authors.forename: Tatiana G
authors.initials: TG
authors.lastname: Kutateladze
authors.forename: Takahiro
authors.initials: T
authors.lastname: Sakai
authors.forename: Takehiko
authors.initials: T
authors.lastname: Sasaki
authors.forename: Nicolas
authors.initials: N
authors.lastname: Markadieu
authors.forename: Christophe
authors.initials: C
authors.lastname: Erneux
authors.forename: Glenn D
authors.initials: GD
authors.lastname: Prestwich
mesh_terms: D000818:Animals; D002460:Cell Line; D002465:Cell Movement / Q000187:drug effects*; D006801:Humans; D000072181:Inositol Polyphosphate 5-Phosphatases; D051379:Mice; D009504:Neutrophils / Q000166:cytology / Q000187:drug effects* / Q000276:immunology; D051059:PTEN Phosphohydrolase / Q000037:antagonists & inhibitors / Q000378:metabolism; D018129:Phosphatidylinositol Phosphates / Q000737:chemistry* / Q000378:metabolism / Q000494:pharmacology; D000072183:Phosphatidylinositol-3,4,5-Trisphosphate 5-Phosphatases; D010744:Phosphoric Monoester Hydrolases / Q000037:antagonists & inhibitors / Q000378:metabolism*; D011485:Protein Binding; D017434:Protein Structure, Tertiary; D018160:Receptors, Cytoplasmic and Nuclear / Q000378:metabolism*; D014982:Xenopus laevis
chemical_list: D018129:Phosphatidylinositol Phosphates; D018160:Receptors, Cytoplasmic and Nuclear; C060974:phosphatidylinositol 3,4,5-triphosphate; C040985:phosphatidylinositol receptors; D010744:Phosphoric Monoester Hydrolases; D000072181:Inositol Polyphosphate 5-Phosphatases; D051059:PTEN Phosphohydrolase; C000606430:INPP5D protein, human; C000606433:Inpp5d protein, mouse; C000606435:Inppl1 protein, mouse; D000072183:Phosphatidylinositol-3,4,5-Trisphosphate 5-Phosphatases