PtdIns-(4)-P1 (1,2-dioctanoyl) (ammonium salt)

PtdIns-(4)-P1 (1,2-dioctanoyl) (ammonium salt) is a synthetic phosphatidylinositol derivative, characterized by two short-chain octanoyl fatty acids at the sn-1 and sn-2 positions of the glycerol backbone. Its primary significance in research lies in its utility for studying the enzymatic activities and regulatory functions of lipid kinases, phosphatases, and phospholipase enzymes. As a precursor to phosphatidylinositol-4,5-bisphosphate (PIP2) and other phosphorylated derivatives, this compound provides insight into phosphoinositide-mediated signaling pathways. PtdIns-(4)-P1 serves as a substrate for lipid kinases, particularly phosphatidylinositol-4-phosphate 5-kinases (PIP5Ks), allowing researchers to study the formation of PIP2 and further phosphorylation to phosphatidylinositol-3,4,5-trisphosphate (PIP3). These phosphorylated derivatives are pivotal in regulating cytoskeletal organization, vesicle trafficking, and membrane dynamics. The compound is also a substrate for phosphoinositide phosphatases, such as SHIP and PTEN, helping researchers understand lipid dephosphorylation and its impact on signal transduction. The dioctanoyl side chains confer enhanced solubility and mimic natural lipid signaling pathways, making this compound valuable for in vitro enzyme assays, lipid-protein interaction studies, and membrane-binding research. Its defined structure and biochemical properties make it a versatile tool in the field of phosphoinositide research.