1. Signaling Pathways
  2. Cell Cycle/DNA Damage
    PI3K/Akt/mTOR
  3. DNA-PK

DNA-PK (DNA依赖蛋白激酶)

DNA-PK (DNA-dependent protein kinase) is a nuclear serine/threonine protein kinase composed of a large catalytic subunit (DNA-PKcs) and a heterodimeric DNA-targeting subunit Ku. DNA-PK is a major component of the nonhomologous end-joining (NHEJ) pathway of DNA double-strand breaks repair. DNA-PK specifically requires association with DNA for its kinase activity, plays important roles in the regulation of different DNA transactions, including transcription, replication and DNA repair, as well as in the maintenance of telomeres.

The assembly of DNA-PK at DSB ends serves as a platform to recruit Artemis, DNA ligase IV and other NHEJ factors that are involved in end-processing and ligation. Within the DNA-PK complex, Ku proteins confer high affinity to DSB ends, and function as early sensors. The subsequent recruitment of DNA-PKcs to DSBs via the Ku proteins triggers the activation of DNA-PKcs, a member of the phosphatidylinositol 3-kinase-related kinase (PIKK) family. Upon activation, DNA-PKcs phosphorylates a number of substrates, including H2AX, XRCC4, Artemis and most importantly, DNA-PKcs itself. Autophosphorylation of DNA-PKcs occurs at numerous Ser/Thr residues throughout the kinase, and has been shown to mediate NHEJ.

DNA-PK 相关产品 (6):

目录号 产品名 作用方式 纯度
  • HY-10108
    LY294002 Inhibitor ≥98.0%
    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 是一种自噬 (autophagy) 和凋亡 (apoptosis) 激活剂。
  • HY-10115
    PI-103 Inhibitor 99.86%
    PI-103 是一种有效的 PI3K mTOR 抑制剂,抑制 p110αp110βp110δp110γmTORC1mTORC2IC50 分别为 8 nM,88 nM,48 nM,150 nM,20 nM 和 83 nM。PI-103 还抑制 DNA-PK,IC50 为 2 nM。PI-103 诱导自噬 (autophagy)
  • HY-101667
    LTURM34 Inhibitor 99.24%
    LTURM34 是一种特异的 DNA-PK 抑制剂 (IC50=34 nM)。与 PI3K 相比,LTURM34 对 DNA-PK 的选择性高 170 倍。LTURM34 在多种肿瘤细胞系中显示出有效的抗增殖活性。
  • HY-19977
    YU238259 Inhibitor 99.57%
    YU238259 是一种同源依赖性 DNA 修复 (HDR) 抑制剂,可用于癌症研究。
  • HY-19341
    Compound 401 Inhibitor 99.97%
    Compound 401 是一种合成的 DNA-PK (IC50=0.28 μM) 抑制剂,在体外也靶向作用于 mTOR,但对 PI3K 没有抑制效果。
  • HY-100706
    AMA-37 Inhibitor ≥99.0%
    AMA-37 是Arylmorpholine 的类似物,是ATP 竞争性的DNA-PK 抑制剂,其IC50 值分别为0.27 μM (DNA-PK)、32 μM (p110α)、3.7 μM (p110β)、and 22 μM (p110γ)。
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