title: A scalable synthesis of the IP7 isomer, 5-PP-Ins(1,2,3,4,6)P5.
abstract: The phosphorylated inositol diphosphates, including the diphosphoinositol pentakisphosphate regioisomers, play critical roles in signal transduction and cellular regulation. In particular, the IP(7) isomer 5-PP-Ins(1,2,3,4,6)P(5) is implicated in a nonenzymatic phosphate transfer converting a protein serine phosphate residue to a serine diphosphate. A scalable, practical new synthesis of 5-PP-Ins(1,2,3,4,6)P(5) is described that also allows access to a variety of IP(7) and IP(8) regioisomers. The identity of the synthetic 5-PP-Ins(1,2,3,4,6)P(5) was validated using IP6K1 to catalyze the conversion of IP(7) + ADP to ATP + IP(6).
authors.affiliation: Department of Medicinal Chemistry, The University of Utah, 419 Wakara Way, Suite 205, Salt Lake City, Utah 84108-1257, USA.
authors.forename: Honglu
authors.initials: H
authors.lastname: Zhang
authors.forename: James
authors.initials: J
authors.lastname: Thompson
authors.forename: Glenn D
authors.initials: GD
authors.lastname: Prestwich
mesh_terms: D002384:Catalysis; D007295:Inositol Phosphates / Q000138:chemical synthesis* / Q000737:chemistry / Q000378:metabolism; D015394:Molecular Structure; D013237:Stereoisomerism
chemical_list: D007295:Inositol Phosphates; C079849:1-diphosphoinositol pentakisphosphate