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-W749694
    Cannflavin B
    		Inhibitor 98.36%
    Cannflavin B is a flavonoid compound that can be isolated from Cannabis sativa L. Cannflavin B is inhibitors of PGE2 release (IC50: 0.7 μM), mPGES-1 (IC50: 3.7 μM), and 5-lipoxygenase. Cannflavin B has multiple activities such as anti-inflammatory, antioxidant, anti-glycation, anti-ferroptosis, anti-tumor, and anti-Leishmania (IC50: 14 μM). Cannflavin B can also inhibit the TrkB-BDNF signaling pathway.
    Cannflavin B
  • HY-N2445
    Flavokawain C
    		Activator 99.79%
    Flavokawain C is an orally active natural chalcone. Flavokawain C inhibits the proliferation of various cancer cells. Flavokawain C upregulates GADD153 in cancer cells, inhibits the phosphorylation of Akt and JNK, suppresses early ERK phosphorylation, activates late ERK phosphorylation, activates caspase related subtypes, induces PARP-1 cleavage, causes upregulation of p21 and p27, downregulation of mutant p53 and anti-apoptotic IAP proteins, elevates intracellular ROS levels, reduces SOD activity, and induces apoptosis. Flavokawain C downregulates FABP4, induces autophagy in cancer cells, and activates the AMPK/mTOR pathway. Flavokawain C decreases the expression of glycolysis-related proteins GLUT1 and HK2, and inhibits glycolysis in nasopharyngeal carcinoma cells. Flavokawain C inhibits the activation of the EGFR/PI3K/Akt/mTOR signaling pathway and reduces the expression of HSP90B1. Flavokawain C inhibits angiogenesis by decreasing the expression of angiogenic proteins Ang-1 and VEGF in human umbilical vein endothelial cells. Flavokawain C increases γ-H2AX levels in cells, inhibits the phosphorylation of FAK, PI3K and AKT in cells, and induces DNA damage in cells. Flavokawain C exerts anti-tumor activity in multiple tumor xenograft mouse models. Flavokawain C is applicable to research related to colorectal cancer, colon adenocarcinoma, nephroblastoma, nasopharyngeal carcinoma and liver cancer.
    Flavokawain C
  • HY-16728B
    Rapastinel Trifluoroacetate
    		Activator 98.0%
    Rapastinel (GLYX-13) Trifluoroacetate is a potent NMDAR modulator capable of crossing the blood-brain barrier, and it exhibits extremely high affinity for human NMDAR (EC50=0.0017-9.9 nM). Rapastinel Trifluoroacetate enhances ERK signaling and activates the mTOR pathway, thereby upregulating the expression of BDNF and VGF, and inducing significant neuroplastic changes such as enhanced LTP and increased mature dendritic spine density in the hippocampus. Rapastinel Trifluoroacetate moderately elevates the efflux of dopamine, norepinephrine and 5-HT in the prefrontal cortex, and uniquely avoids side effects of traditional antidepressants such as dissociation, addiction or sedation. Rapastinel Trifluoroacetate is applicable to the research of major depressive disorder and hepatocellular carcinoma.
    Rapastinel Trifluoroacetate
  • HY-128333
    PI3K/mTOR Inhibitor-4
    		Inhibitor
    PI3K/mTOR Inhibitor-4 is an orally active pan-class I PI3K/mTOR inhibitor. PI3K/mTOR Inhibitor-4 has enzymatic inhibition activity for PI3Kα, PI3Kγ, PI3Kδ and mTOR with IC50 values of 0.63 nM, 22 nM, 9.2 nM and 13.85 nM, respectively. PI3K/mTOR Inhibitor-4 can be used for the research of cancer.
    PI3K/mTOR Inhibitor-4
  • HY-118712
    WYE-23
    		Inhibitor 99.24%
    WYE-23 is a mTOR inhibitor, and IC50 is 0.45 nM. It is selective to PI3Kα and IC50 is 661 nM. WYE-23 has antitumor activity.
    WYE-23
  • HY-137175
    TMBIM6 antagonist-1
    		Antagonist 98.92%
    TMBIM6 antagonist-1, a potential TMBIM6 antagonist, prevents TMBIM6 binding to mTORC2, decreases mTORC2 activity, and also regulates TMBIM6-leaky Ca2+.
    TMBIM6 antagonist-1
  • HY-163198
    ASCT2-IN-1
    		Inhibitor 98.21%
    ASCT2-IN-1 (compound 20k) is an ASCT2 inhibitor with IC50 values of 5.6 μM and 3.5 μM in cells A549 and HEK293, respectively. ASCT2-IN-1 induces cell apoptosis. ASCT2-IN-1 inhibits tumor growth.
    ASCT2-IN-1
  • HY-178164
    HBS-101
    		Inhibitor 99.59%
    HBS-101 is a selectively, orally active, brain-penetrant, Midkine (MDK) inhibitor (KD = 38.4 nM). HBS-101 significantly reduces cell viability, clonogenic survival, and invasiveness and increases apoptosis. HBS-101 involves suppression of the Akt/mTOR, STAT3, and NF-κB pathways. HBS-101 can be used for the study of Triple-negative breast cancer (TNBC).
    HBS-101
  • HY-109046
    Tulrampator
    		99.39%
    Tulrampator (S-47445) is an orally active selective AMPA receptor modulator. Tulrampator possesses procognitive, enhancing synaptic plasticity, anti-depressant-anxiolytic-like, procognitive and potential neuroprotective properties. Tulrampator can be used for research of alzheimer’s disease and in major depressive disorder.
    Tulrampator
  • HY-Y1177
    Diphenyl disulfide
    		Inhibitor 99.96%
    Diphenyl disulfide (Phenyl disulfide) is an organic disulfide compound. Diphenyl disulfide inhibits the PI3K/AKT/mTOR pathway, and induces ferroptosis (ferroptosis), apoptosis (apoptosis) and autophagy (autophagy) in cancer cells. Diphenyl disulfide downregulates GPX4 expression, inhibits NRF2 phosphorylation, induces lipid peroxidation, promotes xCT ubiquitination, induces proteolytic cleavage of p21 Bax into p18 Bax, and suppresses cell proliferation and viability. Diphenyl disulfide can be used in research related to melanoma and breast cancer.
    Diphenyl disulfide
  • HY-W058849
    MT 63-78
    		Inhibitor 98.11%
    MT 63-78 is a specific and potent direct AMPK activator with an EC50 of 25 μM. MT 63–78 also induces cell mitotic arrest and apoptosis. MT 63-78 blocks prostate cancer growth by inhibiting the lipogenesis and mTORC1 pathways. MT 63-78 has antitumor effects.
    MT 63-78
  • HY-157169
    IBL-302
    		Inhibitor
    IBL-302 (AMU302) is an orally available dual-signaling inhibitor of PIM and PI3K/AKT/mTOR with activity against breast cancer and neuroblastoma. IBL-302 demonstrated in vivo efficacy in a nude mouse xenograft model, inhibiting trastuzumab (HY-P9907) resistance challenges. IBL-302 also enhances the effects of common cytotoxic chemotherapy drugs cisplatin (HY-17394), doxorubicin (HY-15142A), and etoposide (HY-13629).
    IBL-302
  • HY-10218R
    Everolimus (Standard)
    		Inhibitor
    Everolimus (Standard) is the analytical standard of Everolimus. This product is intended for research and analytical applications. Everolimus (RAD001) is a Rapamycin (HY-10219) derivative and a potent, selective and orally active mTOR1 inhibitor. Everolimus binds to FKBP-12 to generate an immunosuppressive complex. Everolimus inhibits tumor cells proliferation and induces cell apoptosis and autophagy. Everolimus has potent immunosuppressive and anticancer activities.
    Everolimus (Standard)
  • 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-N3000
    6-Methoxydihydrosanguinarine
    		Inhibitor 99.88%
    6-Methoxydihydrosanguinarine is an alkaloid with activity across multiple cancer cell types. 6-Methoxydihydrosanguinarine activates IRE1/JNK signaling, blocks Akt/mTOR and PI3K/AKT/mTOR pathways, reduces expression of Cdc25C, CyclinB1, Cdc2, YAP/TAZ, Survivin, GPX4, and EGFR, upregulates IRE1 and DR5, and activates JNK and caspases. 6-Methoxydihydrosanguinarine induces apoptosis, G2/M phase arrest, DNA damage, ROS generation, lipid peroxidation, ferroptosis, autophagy, and suppresses cancer cell growth. 6-Methoxydihydrosanguinarine disruptes the biofilm formation of Candida albicans (C. albicans). 6-Methoxydihydrosanguinarine can be used for the research of non-small cell lung cancer, hepatocellular carcinoma, melanoma, colon carcinoma, ovarian cancer and breast cancer.
    6-Methoxydihydrosanguinarine
  • HY-N3307
    (+)-Medioresinol
    		Agonist 99.13%
    (+)-Medioresinol is a furofuran-type lignan with antifungal and antibacterial properties. (+)-Medioresinol synergizes with antibiotics to exert antimicrobial and antibiofilm effects. (+)-Medioresinol induces intracellular ROS accumulation and mitochondrial-mediated apoptosis in Candida albicans. (+)-Medioresinol inhibits LPS (HY-D1056)-stimulated IL-12p40 production. (+)-Medioresinol is a PGC-1α activator that protects against endothelial cell pyroptosis in ischemic stroke via the PPARα-GOT1 axis. (+)-Medioresinol can be used in research on fungal and bacterial infection, inflammation, and ischemic stroke.
    (+)-Medioresinol
  • HY-10219S
    Rapamycin-d3
    		Inhibitor
    Rapamycin-d3 (Sirolimus-d3; AY-22989-d3; NSC 226080-d3) is the deuterated-labeled Rapamycin (HY-10219). Rapamycin (Sirolimus; AY 22989) is a potent and specific blood-brain barrier-transmissible mTOR inhibitor with an IC50 of 0.1 nM in HEK293 cells. Rapamycin is a molecular glue that binds FKBP12 and mTOR proteins together, thereby inhibiting mTOR kinase activity. Rapamycin binds to FKBP12 and specifically acts as an allosteric inhibitor of mTORC1. Rapamycin is an autophagy activator, an immunosuppressant.
    Rapamycin-d<sub>3</sub>
  • HY-151622
    PI3K/mTOR Inhibitor-11
    		Inhibitor 99.65%
    PI3K/mTOR Inhibitor-11 is an orally active PI3K/mTOR inhibitor (IC50: 3.5, 4.6, and 21.3 nM for PI3Kα, PI3Kδ, and mTOR). PI3K/mTOR Inhibitor-11 regulates the PI3K/AKT/mTOR signaling pathway by inhibiting the phosphorylation of AKT and S6 proteins. PI3K/mTOR Inhibitor-11 can be used in the research of cancers.
    PI3K/mTOR Inhibitor-11
  • HY-139142
    Simufilam
    		Inhibitor 99.78%
    Simufilam (PTI-125) is an orally active FLNA modulator. Simufilam restores NMDAR signaling and Arc expression. Simufilam inhibits overactive mTOR signaling by restoring the normal conformation of FLNA, improves insulin sensitivity, reduces Aβ42-induced neuroinflammation and tau protein hyperphosphorylation. Simufilam can be used for research of Alzheimer's disease.
    Simufilam
  • HY-N4315
    Pomiferin
    		Inhibitor 98.01%
    Pomiferin (NSC 5113) acts as an potential inhibitor of HDAC, with an IC50 of 1.05 μM, and also potently inhibits mTOR (IC50, 6.2 µM).
    Pomiferin
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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