1. Signaling Pathways
  2. PI3K/Akt/mTOR
  3. PI3K

PI3K (磷脂酰肌醇3-激酶)

Phosphoinositide 3-kinase

PI3K (Phosphoinositide 3-kinase), via phosphorylation of the inositol lipid phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2), forms the second messenger molecule phosphatidylinositol (3,4,5)-trisphosphate (PI(3,4,5)P3) which recruits and activates pleckstrin homology domain containing proteins, leading to downstream signalling events crucial for proliferation, survival and migration. Class I PI3K enzymes consist of four distinct catalytic isoforms, PI3Kα, PI3Kβ, PI3Kδ and PI3Kγ.

There are three major classes of PI3K enzymes, being class IA widely associated to cancer. Class IA PI3K are heterodimeric lipid kinases composed of a catalytic subunit (p110α, p110β, or p110δ; encoded by PIK3CA, PIK3CB, and PIK3CD genes, respectively) and a regulatory subunit (p85).

The PI3K pathway plays an important role in many biological processes, including cell cycle progression, cell growth, survival, actin rearrangement and migration, and intracellular vesicular transport.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-19312


    Inhibitor 99.91%
    3-Methyladenine (3-MA) 是 PI3K 的抑制剂。它通过抑制class III PI3K广泛作为自噬 (autophagy) 的抑制剂使用。
  • HY-10108
    LY294002 Inhibitor 99.95%
    LY294002 是一种广谱 PI3K 抑制剂,抑制 PI3Kα, PI3KδPI3KβIC50 分别为 0.5, 0.57, 0.97 μM。LY294002 也可抑制 CK2 的活性,IC50 为 98 nM。LY294002 是一种竞争性 DNA-PK 抑制剂,可逆结合 DNA-PK 的激酶结构域,IC50 为 1.4 μM。LY294002 是一种凋亡 (apoptosis) 激活剂。
  • HY-18085


    Inhibitor 98.06%
    Quercetin 是一种天然黄酮类化合物,可激活或抑制许多蛋白质的活性。Quercetin 可激活 SIRT1,也可抑制 PI3K,抑制 PI3KγPI3KδPI3KβIC50 分别为 2.4 μM, 3.0 μM, 5.4 μM。
  • HY-15244
    Alpelisib Inhibitor 99.95%
    Alpelisib (BYL-719) 是有效,选择性的,具有口服活性的 PI3Kα 抑制剂。Alpelisib (BYL-719) 对 PIK3CA 突变癌具有靶向性。Alpelisib (BYL-719) 抑制 p110α、p110γ、p110δ、p110β 的 IC50 分别为 5 nM,250 nM,290 nM,1200 nM。具有抗肿瘤活性。
  • HY-P0175
    740 Y-P Activator 99.67%
    740 Y-P (740YPDGFR; PDGFR 740Y-P) 是一个有效的,具有细胞渗透性的 PI3K 激活剂。740 Y-P 很容易结合含有 p85 的 N- 和 C- 末端 SH2 结构域的 GST 融合蛋白,但不能单独结合 GST。
    740 Y-P
  • HY-153306
    RLY-2608 Inhibitor 99.20%
    RLY-2608是首个PI3Ka 选择性变构抑制剂。
  • HY-19962
    Paxalisib Inhibitor 99.74%
    Paxalisib (GDC-0084) 是一种能透过血脑屏障的 PI3KmTOR 抑制剂,抑制 PI3KαPI3KβPI3KδPI3KγmTORKi 值分别为 2 nM,46 nM,3 nM,10 nM 和 70 nM。
  • HY-156406
    PITCOIN4 Inhibitor 99.97%
    PITCOIN4 是一种高选择性 II 类 < b>PI3K-C2α 抑制剂。PITCOIN4 显示出对 PI3K-C2α 纳米摩尔级别的抑制作用。
  • HY-10197


    Inhibitor 99.86%
    Wortmannin (SL-2052) 是一种有效的,不可逆的,选择性PI3K 抑制剂,IC50 值为 3 nM。Wortmannin (SL-2052) 阻断自噬 (autophagy) 形成,并有效抑制 Polo-like kinase 1 (PlK1)Plk3IC50 值分别为 5.8 和 48 nM。
  • HY-111783
    AZD-7648 Inhibitor 99.86%
    AZD-7648 是一种具有选择性的口服有效 DNA-PK 抑制剂,IC50 值为 0.6 nM, AZD-7648 诱导细胞凋亡 (apoptosis),具有抗肿瘤活性。
  • HY-70063


    Inhibitor 99.90%
    Buparlisib (BKM120; NVP-BKM120) 是一种 pan-class I PI3K 抑制剂,作用于 p110α/p110β/p110δ/p110γIC50 分别为 52 nM/166 nM/116 nM/262 nM。
  • HY-15346


    Inhibitor 99.50%
    Copanlisib (BAY 80-6946) 是一种有效的,选择性的和 ATP 竞争性的泛 I 类 PI3K 抑制剂,对 PI3KαPI3KδPI3KβPI3KγIC50 分别为 0.5 nM、0.7 nM、3.7 nM 和 6.4 nM。除 mTOR 外,Copanlisib 对其他脂质和蛋白激酶的选择性超过 2000 倍。Copanlisib 具有优异的抗肿瘤活性。
  • HY-50673
    Dactolisib Inhibitor 99.94%
    Dactolisib (BEZ235) 是一种具有口服活性的、双重的 pan-class I PI3KmTOR 抑制剂,作用于 p110α/γ/δ/βmTORIC50 分别为 4 nM/5 nM/7 nM/75 nM 和 20.7 nM。Dactolisib (BEZ235) 抑制 mTORC1mTORC2
  • HY-50094
    Pictilisib Inhibitor 99.80%
    Pictilisib (GDC-0941) 是有效的 PI3Kα 抑制剂,IC50为 3 nM;对110β (11倍) 和 p110γ (25倍) 具有适度的选择性。
  • HY-13026


    Inhibitor 99.78%
    Idelalisib (CAL-101; GS-1101) 是一种口服有效的高选择性 p110δ 抑制剂,IC50 为 2.5 nM,比 p110δ 和其他 PI3K class I 酶的选择性高 40 到 300 倍。
  • HY-101562
    Inavolisib Inhibitor 99.85%
    GDC-0077 (RG6114) 是一种有效的,口服的选择性 PI3Kα 抑制剂 (IC50=0.038 nM)。GDC-0077 (RG6114) 通过与 PI3K 的 ATP 结合位点结合而发挥其活性,从而抑制了 PIP2 到 PIP3 的磷酸化。与野生型 PI3Kα 相比,GDC-0077 (RG6114) 对突变体的选择性更高。
  • HY-12481
    SAR405 Inhibitor 98.99%
    SAR405 是首创的,选择性的,具有ATP竞争性的 PI3K III (PIK3C3) 亚型 Vps34 抑制剂 (IC50=1.2 nM; Kd =1.5 nM)。SAR405 抑制饥饿或 mTOR 抑制诱导的自噬。具有抗癌活性。
  • HY-17044
    Duvelisib Inhibitor 99.88%
    Duvelisib (IPI-145) 是一种选择性 p100δ 抑制剂,作用于 p110δ, p110γ, p110β 和 p110α,IC50 分别为 2.5 nM,27.4 nM,85 nM 和 1602 nM。
  • HY-N0728
    α-Linolenic acid


    Inhibitor 99.59%
    α-Linolenic acid 是从紫苏中分离的,人体无法合成的必需脂肪酸。α-Linolenic acid 可通过调节 PI3K/Akt 信号传导来影响血栓形成过程。α-Linolenic acid 具有抗心律失常的特性,并且与心血管疾病和癌症等有关。
    α-Linolenic acid
  • HY-100716
    Eganelisib Inhibitor 99.69%
    Eganelisib (IPI549) 是一种有效的选择性 PI3Kγ 抑制剂,IC50 为 16 nM,选择性比其他脂类和蛋白质激酶高出 100 多倍。
目录号 产品名 / 同用名 应用 反应物种

Phosphatidylinositol 3 kinases (PI3Ks) are a family of lipid kinases that integrate signals from growth factors, cytokines and other environmental cues, translating them into intracellular signals that regulate multiple signaling pathways. These pathways control many physiological functions and cellular processes, which include cell proliferation, growth, survival, motility and metabolism[1]


In the absence of activating signals, p85 interacts with p110 and inhibits p110 kinase activity. Following receptor tyrosine kinase (RTK) or G protein-coupled receptor (GPCR) activation, class I PI3Ks are recruited to the plasma membrane, where p85 inhibition of p110 is relieved and p110 phosphorylates PIP2 to generate PIP3. The activated insulin receptor recruits intracellular adaptor protein IRS1. Phosphorylation of IRS proteins on tyrosine residues by the insulin receptor initiates the recruitment and activation of PI3K. PIP3 acts as a second messenger which promotes the phosphorylation of Akt at Thr308 by PDK-1. RTK activation can also trigger Ras-Raf-MEK-ERK pathway. Activated Akt, ERK and RSK phosphorylate TSC2 at multiple sites to inhibit TSC1-TSC2-TBC1D7, which is the TSC complex that acts as a GTPase-activating protein (GAP) for the small GTPase RHEB. During inhibition of the TSC complex, GTP-loaded RHEB binds the mTOR catalytic domain to activate mTORC1. Glycogen synthase kinase 3β (GSK-3β) activates the TSC complex by phosphorylating TSC2 at Ser1379 and Ser1383. Phosphorylation of these two residues requires priming by AMPK-dependent phosphorylation of Ser1387. Wnt signaling inhibits GSK-3β and the TSC complex, and thus activates mTORC1. mTORC2 is activated by Wnt in a manner dependent on the small GTPase RAC1. Akt activation contributes to diverse cellular activities which include cell survival, growth, proliferation, angiogenesis, metabolism, and migration. Important downstream targets of Akt are GSK-3, FOXOs, BAD, AS160, eNOS, and mTOR. mTORC1 negatively regulates autophagy through multiple inputs, including inhibitory phosphorylation of ULK1, and promotes protein synthesis through activation of the translation initiation promoter S6K and through inhibition of the inhibitory mRNA cap binding 4E-BP1[1][2][3].


PI3Kδ is a heterodimeric enzyme, typically composed of a p85α regulatory subunit and a p110δ catalytic subunit. In T cells, the TCR, the costimulatory receptor ICOS and the IL-2R can activate PI3Kδ. In B cells, PI3Kδ is activated upon crosslinking of the B cell receptor (BCR). The BCR co-opts the co-receptor CD19 or the adaptor B cell associated protein (BCAP), both of which have YXXM motifs to which the p85α SH2 domains can bind. In lumphocytes, BTK and ITK contribute to the activation of PLCγ and promotes the generation of DAG and the influx of Ca2+, which in turn activate PKC and the CARMA1-, BCL 10- and MALT1 containing (CBM) complex. The resulting NF-κB inhibitor kinase (IKK) activation leads to the phosphorylation and the degradation of IκB, and to the nuclear accumulation of the p50-p65 NF-κB heterodimer. MyD88 is an adapter protein that mediates signal transduction for most TLRs and leads to activation of PI3K[4].



[1]. Thorpe LM, et al. PI3K in cancer: divergent roles of isoforms, modes of activation and therapeutic targeting.Nat Rev Cancer. 2015 Jan;15(1):7-24. 
[2]. Vanhaesebroeck B, et al. PI3K signalling: the path to discovery and understanding.Nat Rev Mol Cell Biol. 2012 Feb 23;13(3):195-203. 
[3]. Fruman DA, et al. The PI3K Pathway in Human Disease.Cell. 2017 Aug 10;170(4):605-635.
[4]. Lucas CL, et al. PI3Kδ and primary immunodeficiencies.Nat Rev Immunol. 2016 Nov;16(11):702-714. 

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