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

mTOR

Mammalian target of Rapamycin

mTOR (mammalian target of Rapamycin) is a protein that in humans is encoded by the mTOR gene. mTOR is a serine/threonine protein kinase that regulates cell growth, cell proliferation, cell motility, cell survival, protein synthesis, and transcription. mTOR belongs to the phosphatidylinositol 3-kinase-related kinase protein family. mTOR integrates the input from upstream pathways, including growth factors and amino acids. mTOR also senses cellular nutrient, oxygen, and energy levels. The mTOR pathway is dysregulated in human diseases, such as diabetes, obesity, depression, and certain cancers. Rapamycin inhibits mTOR by associating with its intracellular receptor FKBP12. The FKBP12-rapamycin complex binds directly to the FKBP12-Rapamycin Binding (FRB) domain of mTOR, inhibiting its activity.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-N0486S8
    L-Leucine-13C6,15N
    Activator 99.90%
    L-Leucine-13C6,15N is the 13C- and 15N-labeled L-Leucine. L-Leucine is an essential branched-chain amino acid (BCAA), which activates the mTOR signaling pathway.
    L-Leucine-<sup>13</sup>C<sub>6</sub>,<sup>15</sup>N
  • HY-N0107
    Cyclovirobuxine D
    Inhibitor 99.70%
    Cyclovirobuxine D (CVB-D) is the main active component of the traditional Chinese medicine Buxus microphylla. Cyclovirobuxine D induces autophagy and attenuates the phosphorylation of Akt and mTOR. Cyclovirobuxine D inhibits cell proliferation of gastric cancer cells through suppression of cell cycle progression and inducement of mitochondria-mediated apoptosis. Cyclovirobuxine D is beneficial for heart failure induced by myocardial infarction.
    Cyclovirobuxine D
  • HY-B0319
    Tioconazole
    Inhibitor 99.90%
    Tioconazole (UK-20349) is a broad-spectrum antifungal imidazole derivative. Tioconazole inhibits several dermatophytes and yeasts, with MIC50 values of less than 3.12 mg/L and 9 mg/L, respectively. Additionally, Tioconazole exhibits anti-parasitic activity. Tioconazole exerts anticancer activity by inhibiting the PI3K/AKT/mTOR signaling pathway and blocking autophagy. Tioconazole is applicable for research in the fields of anti-infection and anticancer therapy.
    Tioconazole
  • HY-Y0252R
    L-Proline (Standard)
    Activator
    L-Proline (Standard) is the analytical standard of L-Proline. This product is intended for research and analytical applications. L-Proline is one of the twenty amino acids used in living organisms as the building blocks of proteins.
    L-Proline (Standard)
  • HY-16962A
    CC-115 hydrochloride
    Inhibitor 98.03%
    CC-115 hydrochloride is a potent and dual DNA-PK and mTOR kinase inhibitor with IC50s of 13 nM and 21 nM, respectively. CC-115 blocks both mTORC1 and mTORC2 signaling.
    CC-115 hydrochloride
  • HY-13334
    BGT226 maleate
    Inhibitor 99.92%
    BGT226 (NVP-BGT226 maleate) is a PI3K (with IC50s of 4 nM, 63 nM and 38 nM for PI3Kα, PI3Kβ and PI3Kγ) /mTOR dual inhibitor which displays potent growth-inhibitory activity against human head and neck cancer cells.
    BGT226 maleate
  • HY-139142B
    Simufilam hydrochloride
    Inhibitor 99.85%
    Simufilam hydrochloride (PTI-125 hydrochloride) is an orally active FLNA modulator. Simufilam hydrochloride restores NMDAR signaling and Arc expression. Simufilam hydrochloride inhibits overactive mTOR signaling by restoring the normal conformation of FLNA, improves insulin sensitivity, reduces Aβ42-induced neuroinflammation and tau protein hyperphosphorylation. Simufilam hydrochloride can be used for research of Alzheimer's disease.
    Simufilam hydrochloride
  • HY-N6950
    Hederacolchiside A1
    Modulator 99.0%
    Hederacolchiside A1, isolated from Pulsatilla chinensis, suppresses proliferation of tumor cells by inducing apoptosis through modulating PI3K/Akt/mTOR signaling pathway. Hederacolchiside A1 has antischistosomal activity, affecting parasite viability both in vivo and in vitro.
    Hederacolchiside A1
  • HY-128932
    Cefminox sodium
    99.83%
    Cefminox sodium (MT-141) is a semisynthetic cephamycin, which exhibits antibacterial activity. Cefminox sodium is a broad-spectrum, bactericidal cephalosporin antibiotic. Cefminox sodium also acts as a dual agonist of prostacyclin receptor (IP) and PPARγ. Cefminox sodium upregulates cAMP production and PTEN expression and inhibits Akt/mTOR signaling. Cefminox sodium also prevents pulmonary arterial hypertension in rat model.
    Cefminox sodium
  • HY-100222
    CZ415
    Inhibitor 98.39%
    CZ415 is a potent and highly selective mTOR inhibitor with a pIC50 of 8.07. CZ415 inhibits mTORC1 and mTORC2 protein complex.
    CZ415
  • HY-156671
    RMC-4998
    Inhibitor 99.31%
    RMC-4998 is an orally active inhibitor targeting the active or GTP-bound state of the KRASG12C mutant. RMC-4998 can form a ternary complex with intracellular CYPA and the activated KRASG12C mutant, with an IC50 value of 28 nM. RMC-4998 can inhibit ERK signaling in KRASG12C mutant cancer cells and induce apoptosis. RMC-4998 can be used for tumor research.
    RMC-4998
  • HY-100398
    PF-04979064
    Inhibitor 99.93%
    PF-04979064 is a potent and selective PI3K/mTOR dual kinase inhibitor with Kis of 0.13 nM and 1.42 nM for PI3Kα and mTOR, respectively.
    PF-04979064
  • HY-N0486S2
    L-Leucine-13C6
    Activator 99.64%
    Leucine-13C6 is the 13C-labeled L-Leucine. L-Leucine is an essential branched-chain amino acid (BCAA), which activates the mTOR signaling pathway.
    L-Leucine-<sup>13</sup>C<sub>6</sub>
  • HY-N0910
    Notoginsenoside Ft1
    Inhibitor 98.0%
    NotoginsenosideFt1 is a saponin found in Panax notoginseng. Notoginsenoside Ft1 inhibits the PI3K/AKT/mTOR signaling pathway, activates the p38 MAPK and ERK1/2 signaling pathways, and increases the proportion of CD8+ T cells, thereby inducing apoptosis and lysosomal cell death in various cancer cells, and promoting angiogenesis. Notoginsenoside Ft1 causes vasodilation by activating glucocorticoid receptors (GR) and estrogen receptor beta (ERβ) in endothelial cells. Notoginsenoside Ft1 increases intracellular Ca2+ accumulation, reduces cAMP levels by activating a signaling network mediated through P2Y12 receptors, and promotes platelet aggregation, thereby exerting a procoagulant effect. Notoginsenoside Ft1 inhibits ferroptosis (ferroptosis) in renal tubular epithelial cells by activating the TGR5 receptor, thereby demonstrating a renal protective effect. Notoginsenoside Ft1 acts as a TGR5 agonist and an FXR antagonist to combat obesity and insulin resistance.
    Notoginsenoside Ft1
  • HY-N0735
    Phellodendrine chloride
    Agonist 99.79%
    Phellodendrine chloride is an orally active plant alkaloid. Phellodendrine chloride inhibits the proliferation of KRAS-mutated pancreatic cancer cells by suppressing macropinocytosis and glutamine metabolism, inducing ROS accumulation and mitochondrial apoptosis. Phellodendrine chloride promotes autophagy by activating the AMPK/mTOR pathway, alleviating intestinal damage in ulcerative colitis. Phellodendrine chloride can alleviate gouty arthritis by inhibiting the IL-6/STAT3 signaling pathway. Phellodendrine chloride suppresses allergic reactions by altering the conformation of MRGPRB3/MRGPRX2 protein, thereby inhibiting the activation of PKC and subsequent downstream MAPK and NF-κB signaling. Phellodendrine chloride inhibits the AKT/NF-κB pathway and down-regulates the expression of COX-2, thereby protecting zebrafish embryos from oxidative stress. Phellodendrine chloride has an anti-major depressive disorder (MDD) effect by down-regulating CHRM1, HTR1A, and the PI3K/Akt signaling pathway.
    Phellodendrine chloride
  • HY-N0885
    Telocinobufagin
    Inhibitor 99.93%
    Telocinobufagin (Telobufotoxin; Telocinobufogenin) is an orally active bufadienolide with potential anti-tumor effects. Telocinobufagin exerts its anti-cancer effects on non-small cell carcinoma, osteosarcoma, thyroid cancer, breast cancer and head and neck squamous cell carcinoma by inhibiting the STAT3, JAK2/STAT3, LARP1-mTOR, PI3K/Akt/Snail and PLK1 pathways, and can also induce tumor cell apoptosis. Telocinobufagin enhances the Th1 immune response and protects against Salmonella typhimurium infection. Telocinobufagin has a strong cardiac-stimulating effect by inhibiting the activity of Na+/K+-ATPase, and it can promote renal fibrosis. Telocinobufagin demonstrates non-opioid analgesic effects in various acute pain models.
    Telocinobufagin
  • HY-10115A
    PI-103 Hydrochloride
    Inhibitor 98.55%
    PI-103 Hydrochloride is a dual PI3K and mTOR inhibitor with IC50s of 8 nM, 88 nM, 48 nM, 150 nM, 20 nM, and 83 nM for p110α, p110β, p110δ, p110γ, mTORC1, and mTORC2. PI-103 Hydrochloride also inhibits DNA-PK with an IC50 of 2 nM. PI-103 Hydrochloride induces autophagy.
    PI-103 Hydrochloride
  • HY-10811
    GNE-493
    Inhibitor 99.81%
    GNE-493 is a potent, selective, and orally available dual pan-PI3-kinase/mTOR inhibitor with IC50s of 3.4 nM, 12 nM, 16 nM, 16 nM and 32 nM for PI3Kα, PI3Kβ, PI3Kδ, PI3Kγ and mTOR.
    GNE-493
  • HY-W016412
    Coenzyme Q0
    Inhibitor 99.79%
    Coenzyme Q0 (CoQ0) is a potent, oral active ubiquinone compound can be derived from Antrodia cinnamomea. Coenzyme Q0 induces apoptosis and autophagy, suppresses of HER-2/AKT/mTOR signaling to potentiate the apoptosis and autophagy mechanisms. Coenzyme Q0 regulates NFκB/AP-1 activation and enhances Nrf2 stabilization in attenuation of inflammation and redox imbalance. Coenzyme Q0 has anti-angiogenic activity through downregulation of MMP-9/NF-κB and upregulation of HO-1 signaling.
    Coenzyme Q0
  • HY-N0656A
    (+)-Usnic acid
    Inhibitor 99.63%
    (+)-Usnic acid is isolated from isolated from lichens, binds at the ATP-binding pocket of mTOR, and inhibits mTORC1/2 activity. (+)-Usnic acid inhibits the phosphorylation of mTOR downstream effectors: Akt (Ser473), 4EBP1, S6K, induces autophay, with anti-cancer and anti-inflammatory activity. (+)-Usnic acid possesses antimicrobial activity against a number of planktonic gram-positive bacteria, including Staphylococcus aureus, Enterococcus faecalis, and Enterococcus faecium.
    (+)-Usnic acid
Cat. No. Product Name / Synonyms Application Reactivity

The mammalian target of rapamycin (mTOR) signaling pathway integrates both intracellular and extracellular signals and serves as a central regulator of cell metabolism, growth, proliferation and survival[1]. mTOR is the catalytic subunit of two distinct complexes called mTORC1 and mTORC2. mTORC1 comprises DEPTOR, PRAS40, RAPTOR, mLST8, mTOR, whereas mTORC2 comprises DEPTOR, mLST8, PROTOR, RICTOR, mSIN1, mTOR[2]. Rapamycin binds to FKBP12 and inhibits mTORC1 by disrupting the interaction between mTOR and RAPTOR. mTORC1 negatively regulates autophagy through multiple inputs, including inhibitory phosphorylation of ULK1 and TFEB. mTORC1 promotes protein synthesis through activation of the translation initiation promoter S6K and through inhibition of the inhibitory mRNA cap binding 4E-BP1, and regulates glycolysis through HIF-1α. It promotes de novo lipid synthesis through the SREBP transcription factors. mTORC2 inhibits FOXO1,3 through SGK and Akt, which can lead to increased longevity. The complex also regulates actin cytoskeleton assembly through PKC and Rho kinase[3]

 

Growth factors: Growth factors can signal to mTORC1 through both PI3K-Akt and Ras-Raf-MEK-ERK axis. For example, ERK and RSK phosphorylate TSC2, and inhibit it.

 

Insulin Receptor: The activated insulin receptor recruits intracellular adaptor protein IRS1. Phosphorylation of these 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 and triggers the Akt-dependent multisite phosphorylation of TSC2. TSC is a heterotrimeric complex comprised of TSC1, TSC2, and TBC1D7, and functions as a GTPase activating protein (GAP) for the small GTPase Rheb, which directly binds and activates mTORC1. mTORC2 primarily functions as an effector of insulin/PI3K signaling. 

 

Wnt: The Wnt pathway activates mTORC1. Glycogen synthase kinase 3β (GSK-3β) acts as a negative regulator of mTORC1 by phosphorylating TSC2. mTORC2 is activated by Wnt in a manner dependent on the small GTPase RAC1[4].

 

Amino acids: mTORC1 senses both lysosomal and cytosolic amino acids through distinct mechanisms. Amino acids induce the movement of mTORC1 to lysosomal membranes, where the Rag proteins reside. A complex named Ragulator, interact with the Rag GTPases, recruits them to lysosomes through a mechanism dependent on the lysosomal v-ATPase, and is essential for mTORC1 activation. In turn, lysosomal recruitment enables mTORC1 to interact with GTP-bound RHEB, the end point of growth factor. Cytosolic leucine and arginine signal to mTORC1 through a distinct pathway comprised of the GATOR1 and GATOR2 complexes.    

 

Stresses: mTORC1 responds to intracellular and environmental stresses that are incompatible with growth such as low ATP levels, hypoxia, or DNA damage. A reduction in cellular energy charge, for example during glucose deprivation, activates the stress responsive metabolic regulator AMPK, which inhibits mTORC1 both indirectly, through phosphorylation and activation of TSC2, as well as directly through the phosphorylation of RAPTOR. Sestrin1/2 are two transcriptional targets of p53 that are implicated in the DNA damage response, and they potently activate AMPK, thus mediating the p53-dependent suppression of mTOR activity upon DNA damage. During hypoxia, mitochondrial respiration is impaired, leading to low ATP levels and activation of AMPK. Hypoxia also affects mTORC1 in AMPK-independent ways by inducing the expression of REDD1, the protein products of which then suppress mTORC1 by promoting the assembly of TSC1-TSC2[2].

 

Reference:

[1]. Laplante M, et al.mTOR signaling at a glance.J Cell Sci. 2009 Oct 15;122(Pt 20):3589-94. 
[2]. Zoncu R, et al. mTOR: from growth signal integration to cancer, diabetes and ageing.Nat Rev Mol Cell Biol. 2011 Jan;12(1):21-35. 
[3]. Johnson SC, et al. mTOR is a key modulator of ageing and age-related disease.Nature. 2013 Jan 17;493(7432):338-45.
[4]. Shimobayashi M, et al. Making new contacts: the mTOR network in metabolism and signalling crosstalk.Nat Rev Mol Cell Biol. 2014 Mar;15(3):155-62.

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