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

mTOR

Mammalian target of Rapamycin

mTOR

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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.

mTOR Isoform Specific Products:

mTOR Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • 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-17471AR
    Metformin hydrochloride (Standard)
    		Inhibitor
    Metformin hydrochloride (Standard) is the analytical standard of Metformin hydrochloride (HY-17471A). This product is intended for research and analytical applications. Metformin (1,1-Dimethylbiguanide) hydrochloride inhibits the mitochondrial respiratory chain in the liver, leading to AMPK activation and enhancing insulin sensitivity, and can be used in the study of type 2 diabetes. Metformin hydrochloride exerts central glucose-lowering effects by inhibiting Ras-related protein 1 (Rap1) in SF1 hypothalamic neurons. Metformin hydrochloride also inhibits liver oxidative stress, nitrosative stress, inflammation, and apoptosis caused by liver ischemia/reperfusion injury. In addition, Metformin hydrochloride regulates the expression of autophagy-related proteins by activating AMPK and inhibiting the mTOR signaling pathway, thereby inducing tumor cell autophagy and inhibiting the growth of renal cell carcinoma in vitro and in vivo.
    Metformin hydrochloride (Standard)
  • HY-14668
    Lomitapide mesylate
    		Inhibitor 99.61%
    Lomitapide (AEGR-733; BMS-201038) mesylate is an orally active microsomal triglyceride transfer protein (MTP) inhibitor and a selective mTORC1 inhibitor with lipid-lowering activity and BBB permeability. Lomitapide mesylate significantly reduces plasma LDL levels by blocking the assembly and secretion of very-low-density lipoprotein (VLDL). Lomitapide mesylate inhibits mTORC1 in an ATP-dependent manner, thereby inducing AMPK-independent autophagic cell death and suppressing cancer cell growth and apoptosis. Lomitapide mesylate also enhances tumor infiltration of CD8+ T cells. In addition, Lomitapide mesylate inhibits HDAC, improves endothelial function, effectively alleviates vascular inflammation and oxidative stress, and exerts neuroprotective effects in a cerebral ischemia/reperfusion injury model. Lomitapide mesylate can be used in research on related diseases such as colorectal cancer, breast cancer, melanoma, ischemic stroke, and familial hypercholesterolemia.
    Lomitapide mesylate
  • HY-N0616
    Trifolirhizin
    		Activator 98.37%
    Trifolirhizin is a pterocarpan flavonoid found in the roots of Sophora flavescens. Trifolirhizin is a tyrosinase inhibitor with an IC50 value of 506.77 μM. Trifolirhizin reduces intracellular melanin production and modulates multiple signaling pathways including NFκB-MAPK, AMPK/mTOR, PI3K/Akt, MAPK-NFATc1 and EGFR-MAPK. Trifolirhizin targets biological molecules including PTK6 and COX-2, inhibits the activities of hyaluronidase, collagenase and elastase, induces apoptosis, autophagy and cell cycle arrest, and suppresses the proliferation, migration and invasion of cancer cells. Trifolirhizin exerts diverse pharmacological effects including anti-inflammatory, anti-asthmatic, bone-protective, renoprotective, antibacterial, antifungal, hepatoprotective, antiplatelet, estrogenic and wound-healing activities. Trifolirhizin can be used to investigate a broad range of malignant, inflammatory, metabolic and infectious disorders.
    Trifolirhizin
  • HY-115449
    Chromeceptin
    		p53 Inhibitor 99.80%
    Chromeceptin (94G6) is an IGF signaling pathway inhibitor. Chromeceptin suppresses IGF2 expression at mRNA and protein levels in hepatocyte and HCC cells. Chromeceptin inhibits the phosphorylation levels of AKT and mTOR.
    Chromeceptin
  • HY-10683
    PKI-402
    		Inhibitor 99.17%
    PKI-402 is a selective, reversible, ATP-competitive inhibitor of PI3K, including PI3K-α mutants, and mTOR (IC50=2, 3, 7,14 and 16 nM for PI3Kα, mTOR, PI3Kβ, PI3Kδ and PI3Kγ).
    PKI-402
  • HY-13431
    KU-0060648
    		Inhibitor 99.87%
    KU-0060648 is a dual inhibitor of PI3K and DNA-PK with IC50s of 4 nM, 0.5 nM, 0.1 nM, 0.594 nM and 8.6 nM for PI3Kα, PI3Kβ, PI3Kγ, PI3Kδ and DNA-PK, respectively.
    KU-0060648
  • HY-N6950
    Hederacolchiside A1
    		Modulator 98.28%
    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-N0657
    Pinoresinol Diglucoside
    		99.84%
    Pinoresinol Diglucoside is an orally active lignan with multifunctional bioactivity. Pinoresinol Diglucoside interacts with targets including ALB, HIF1A, GSK3B, BCL2, MARK3, IL6, NF-κB p65, Nrf2, HO-1, and TLR4, and modulates pathways including PI3K-Akt, estrogen, MAPK, Rap1, AKT/mTOR/NF-κB, and TGF-β1/Smads. Pinoresinol Diglucoside regulates osteogenesis, bone resorption, oxidative stress, inflammation, apoptosis, ferroptosis, ferritinophagy, cardiac fibrosis, and vasorelaxation. Pinoresinol Diglucoside can be used for the research of osteoporosis, ischemia/reperfusion-induced brain injury, Alzheimer’s disease, myocardial ischemia-reperfusion injury, chondrodysplasia, diabetic cardiomyopathy, cardiac hypertrophy, hypertension, cisplatin-induced hearing loss, atherosclerotic cardiovascular diseases, and disuse osteoporosis.
    Pinoresinol Diglucoside
  • HY-10115A
    PI-103 Hydrochloride
    		Inhibitor 98.06%
    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-134904
    RMC-6272
    		Inhibitor
    RMC-6272 (RM-006) is a bi-steric mTORC1-selective inhibitor. RMC-6272 exhibits potent and selective (> 10-fold) inhibition of mTORC1 over mTORC2. RMC-6272 shows improved inhibition of mTORC1 in comparison to Rapamycin, and induces more cell death in TSC2 null tumors.
    RMC-6272
  • HY-18353
    mTOR inhibitor-3
    		Inhibitor 99.79%
    mTOR inhibitor-3 is a remarkably selective mTOR inhibitor with a Ki of 1.5 nM. mTOR inhibitor-3 suppresses mTORC1 and mTORC2 in cellular and in vivo pharmacokinetic (PK)/pharmacodynamic (PD) experiments.
    mTOR inhibitor-3
  • HY-139534
    ARI-1
    		Inhibitor 99.16%
    ARI-1 is a receptor tyrosine kinase-like orphan receptor 1 (ROR1) inhibitor. ARI-1 blocks the PI3K/AKT/mTOR signaling pathway in a ROR1-dependent manner. ARI-1 upregulates cleaved-PARP and p-P38. ARI-1 induces Apoptosis. ARI-1 has anticancer activity against non-small cell lung cancer.
    ARI-1
  • HY-N0712
    Typhaneoside
    		Activator 99.74%
    Typhaneoside is an orally active activator of PI3K/Akt/mTOR and farnesoid X receptor. Typhaneoside promotes the activation of AMPK and Caspase-3, induces apoptosis, ferroptosis, autophagy, ROS accumulation, cell cycle arrest at the G2/M phase, and reduces cancer cell viability. Typhaneoside improves glucose and lipid metabolism, alleviates inflammatory responses, oxidative stress and hepatic lipid accumulation, and exerts hepatoprotective effects. Typhaneoside can be used in research related to heart failure after myocardial infarction, acute myeloid leukemia, non-alcoholic fatty liver disease and neurological disorders.
    Typhaneoside
  • 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-16962A
    CC-115 hydrochloride
    		Inhibitor 98.01%
    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-N7400
    Phaseoloidin
    		Activator 99.92%
    Phaseoloidin is an orally active multi-target inhibitor. Phaseoloidin inhibits the activation of the NLRP3 inflammasome and blocks the caspase-11-GSDMD pyroptosis axis. Phaseoloidin reduces the expression of collagen-degrading enzymes to maintain the integrity of cartilage matrix. Phaseoloidin activates the AMPK/mTOR pathway to enhance autophagy function and reverse apoptosis resistance. Phaseoloidin inhibits the growth and development of Manduca sexta and Spodoptera littoralis larvae, thereby helping Nicotiana attenuata defend against lepidopteran herbivorous insects. Phaseoloidin can be used in research related to acute gouty arthritis and pulmonary fibrosis.
    Phaseoloidin
  • HY-N0735
    Phellodendrine chloride
    		Agonist 99.68%
    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-W130610
    Stearamide
    		Activator
    Stearamide is a primary fatty acid amide. Stearamide displays cytotoxic and ichthytoxic activity.
    Stearamide
  • HY-N2541
    Gymnemic acid I
    		Inhibitor 98.84%
    Gymnemic acid I is a bioactive triterpene saponin found in Gymnema sylvestre. Gymnemic acid I is an antisweetness inhibitor via human sweet receptor type 1 receptor 2 (T1R2) and T1R3. Gymnemic acid I is a ribosomal protein biosynthesis inhibitor. Gymnemic acid I has antidiabetic effects. Gymnema acid I induces autophagy-protected MIN-6 cells from apoptosis under high glucose stress by inhibiting the phosphorylation activity of mTOR.
    Gymnemic acid I
Cat. No. Product Name / Synonyms Application Reactivity
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Download mTOR Signaling Pathway Map.

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.

mTOR Isoform Comparison

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