pi protein

Chloramphenicol (Chloromycetin) 是一种广谱抗生素，有效抑制细菌蛋白质生物合成。Chloramphenicol 主要作用于细菌 70S 核糖体的 50S 亚基，对肽基转移酶有活性，抑制肽键的形成。

The phosphatidylinositol phosphates represent a small percentage of total membrane phospholipids. However, they play a critical role in the generation and transmission of cellular signals. PtdIns-(3,4,5)-P3 can serve as an anchor for the binding of signal transduction proteins bearing pleckstrin homology (PH) domains. Centuarin α and the Akt-family of GTPase activating proteins are examples of PtdIns-(3,4,5)-P3-binding proteins. Protein-binding to PtdIns-(3,4,5)-P3 is important for cytoskeletal rearrangements and membrane trafficking. PtdIns-(3,4,5)-P3 is resistant to cleavage by PI-specific phospholipase C (PLC). Thus, it is likely to function in signal transduction as a modulator in its own right, rather than as a source of inositol tetraphosphates. For further reading on inositol phospholipids, see also references and .

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-(3,4,5)-P3, also known as PIP3, is resistant to cleavage by PI-specific phospholipase C (PLC). Thus, it is likely to function in signal transduction as a modulator in its own right, rather than as a source of inositol tetraphosphates. PIP3 can serve as an anchor for the binding of signal transduction proteins bearing pleckstrin homology (PH) domains. Protein binding to PIP3 is important for cytoskeletal rearrangement and membrane trafficking. PtdIns-(3,4,5)-P3 (1,2-dihexanoyl) is a synthetic analog of natural PIP3 with C6:0 fatty acids at the sn-1 and sn-2 positions. The compound features the same inositol and diacylglycerol (DAG) stereochemistry as that of the natural compound. The short fatty acid chains of this analog give it different physical properties from naturally-occurring PIP3, including higher solubility in aqueous media.

PI-103 是一种 PI3K 和 mTOR 抑制剂，抑制 p110α、p110β、p110δ、p110γ、mTORC1和 mTORC2，IC50分别为 8 nM、88 nM、48 nM、150 nM、20 nM 和 83 nM。它可诱导自噬，还抑制 DNA-PK，IC50为 2 nM。

PI(3,4)P2 (18:1) ammonium salt 作为一种多磷酸化磷脂酰肌醇，主要功能是激活磷脂酰肌醇 3 激酶（PI3K），由此促进AKT(蛋白激酶B)的活化，从而对细胞的代谢、生长和存活产生重要影响。此外，该化合物还参与调控细胞骨架的动态变化，进而影响细胞形态和运动。该化合物广泛应用于癌症、糖尿病和心血管疾病的发病机制研究中。