ptdins(4,5)p2

GSK-A1 是 III 型磷脂酰肌醇 4-激酶 PI4KA 选择性抑制剂，pIC50为 8.5-9.8，抑制 PtdIns(4,5)P2 再合成，IC50约为 3 nM。GSK-A1有效降低 PtdIns(4)P 的水平，而对 PtdIns(4,5)P2 没影响。GSK-A1在抗丙型肝炎病毒方面有研究的潜力。

Phosphatidylinositol-(4,5)-P2(1,2-dipalmitoyl), a synthetic analog of natural phosphatidylinositol (PtdIns) with C16:0 fatty acids at the sn-1 and sn-2 positions, maintains the inositol and diacylglycerol (DAG) stereochemistry of its natural counterpart. Although phosphatidylinositol phosphates constitute a minor fraction of total membrane phospholipids, they are pivotal in initiating and propagating cellular signals. This compound mirrors the activity of the natural phosphatidylinositol produced by PtdIns-4-phosphate 5-kinase's action on PtdIns-(4)-P1. Its hydrolysis by phosphoinositide (PI)-specific phospholipase C yields inositol triphosphate (IP3) and DAG, crucial secondary messengers in a complex signal transduction pathway.

PtdIns-(4,5)-P2 (1,2-dihexanoyl) (sodium salt) 是一种天然 PtdIns 的合成类似物，具有在 sn-1 和 sn-2 位置的 C6:0 脂肪酸。

The phosphatidylinositol (PtdIns) phosphates represent a small percentage of total membrane phospholipids. However, they play a critical role in the generation and transmission of cellular signals. PtdIns-(1,2-dioctanoyl) is a synthetic analog of natural phosphatidylinositol (PtdIns) containing C8:0 fatty acids at the sn-1 and sn-2 positions. The compound features the same inositol and diacyl glycerol (DAG) stereochemistry as that of the natural compound. The short fatty acid chains of this analog, compared to naturally-occurring PtdIns, gives it different physical properties including high solubility in aqueous media. PtdIns are phosphorylated to mono- (PtdIns-P; PIP), di- (PtdIns-P2; PIP2), and triphosphates (PtdIns-P3; PIP3). Hydrolysis of PtdIns-(4,5)-P2 by phosphoinositide (PI)-specific phospholipase C generates inositol triphosphate (IP3) and DAG which are key second messengers in an intricate biochemical signal transduction cascade.

The phosphatidylinositol (PtdIns) phosphates represent a small percentage of total membrane phospholipids. However, they play a critical role in the generation and transmission of cellular signals. PtdIns-(4)-P1 (1,2-dioctanoyl) is a synthetic analog of natural phosphatidylinositol (PtdIns) featuring C8:0 fatty acids at the sn-1 and sn-2 positions. The compound contains the same inositol and diacylglycerol (DAG) stereochemistry as the natural compound. PtdIns-(4)-P1 can be phosphorylated to di- (PtdIns-P2; PIP2) and triphosphates (PtdIns-P3; PIP3). Hydrolysis of PtdIns-(4,5)-P2 by phosphoinositide (PI)-specific phospholipase C generates inositol triphosphate (IP3) and DAG which are key second messengers in an intricate biochemical signal transduction cascade.

DPPI-5-P (ammonium) (PtdIns-(5)-P1) 可磷酸化生成二磷酸酯如 PtdIns-(4,5)-P2。同时，DPPI-5-P (ammonium) 可被磷脂酰肌醇 (PI) 特异性磷脂酶C (PLC) 裂解，产生肌醇三磷酸酯。