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-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-136660
    PQR626
    Inhibitor 98.05%
    PQR626, a rapamycin derivative, is a potent, selective, orally active, and brain-penetrant mTOR inhibitor, with an IC50 and Ki of 5 nM and 3.6 nM, respectively. PQR626 can be can be used for the research of neurological disorders.
    PQR626
  • HY-109179A
    Itacnosertib hydrochloride
    Inhibitor 99.43%
    Itacnosertib hydrochloride (TP-0184 hydrochloride) is the inhibitor for FLT3, ACVR1 (ALK2, IC50=8 nM) and JAK2 (IC50=8540 nM). Itacnosertib hydrochloride exhibits anti-leukemic activity.
    Itacnosertib hydrochloride
  • HY-110109
    ETP-45658
    Inhibitor 98.97%
    ETP-45658 is a potent PI3K inhibitor, with IC50s of 22.0 nM, 39.8 nM, 129.0 nM and 717.3 nM for PI3Kα, PI3Kδ, PI3Kβ and PI3Kγ, respectively. ETP-45658 also can inhibit DNA-PK (IC50=70.6 nM) and mTOR (IC50=152.0 nM). ETP-45658 can be used for the research of cancer.
    ETP-45658
  • HY-122665
    HTH-01-091
    Inhibitor 98.64%
    HTH-01-091 is a potent and selective maternal embryonic leucine zipper kinase (MELK) inhibitor, with an IC50 of 10.5 nM. HTH-01-091 also inhibits PIM1/2/3, RIPK2, DYRK3, smMLCK and CLK2. HTH-01-091 can be uesd for breast cancer research.
    HTH-01-091
  • HY-P1823
    C-Reactive Protein (CRP) (174-185)
    Modulator 99.88%
    C-Reactive Protein (CRP) is an anti-pneumococcal plasma protein that can serve as an inflammatory marker. C-Reactive protein can protect mice from pneumococcal infection by activating complement. C-Reactive protein can inhibit the activation of caspase-3/9 through the CD64/AKT/mTOR pathway, thereby promoting chemotherapy resistance in mice with tongue squamous cell carcinoma.
    C-Reactive Protein (CRP) (174-185)
  • HY-101955
    (2S,6S)-Hydroxynorketamine hydrochloride
    Activator 99.30%
    (2S,6S)-Hydroxynorketamine hydrochloride is a neurorelaxant with potential antidepressant and analgesic effects. (2S,6S)-Hydroxynorketamine hydrochloride can activate the mTOR pathway, increase the phosphorylation level of downstream targets, and antagonize α7-nicotinic acetylcholine receptor (nAChR) to exert neuroactive properties.
    (2S,6S)-Hydroxynorketamine hydrochloride
  • HY-163199
    ASCT2-IN-2
    Inhibitor 99.10%
    ASCT2-IN-2 (compound 25e) is an ASCT2 inhibitor with IC50 of 5.14 μM. ASCT2-IN-2 regulates amino acid metabolism as well as mTOR signaling and thereby induces cell apoptosis. ASCT2-IN-2 inhibits tumor growth.
    ASCT2-IN-2
  • HY-W348485
    WRX606
    Inhibitor
    WRX606 is an orally active nonrapalog inhibitor for mTOR complex 1 (mTORC1M). WRX606 inhibits the phosphorylation of mTORC1 substrate S6 kinase 1 (S6K1) (IC50 = 10 nM) and eukaryotic translation initiation factor 4E binding protein (p-4E-BP1) (IC50 = 0.27 μM) in MCF-7 cells. WRX606 suppresses tumor growth in mice without promotion of metastasis. WRX606 can be studied in research as an antitumor agent.
    WRX606
  • 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-N3307
    (+)-Medioresinol
    Agonist 98.88%
    (+)-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-162143
    SKI-349
    Inhibitor 99.58%
    SKI-349 is a dual-targeted inhibitor of sphingosine kinase 1/2 (SPHK1/2) and microtubule assembly (MDA). SKI-349 has anticancer activity. SKI-349 can inhibit the vitality, invasion, and AKT/mTOR signaling pathway of liver cells.
    SKI-349
  • HY-10219GL
    Rapamycin (GMP Like)
    Inhibitor 98.8%
    Rapamycin (Sirolimus) GMP Like is Rapamycin (HY-10219) produced by using GMP like guidelines. GMP Like small molecules works appropriately as an auxiliary reagent for cell therapy manufacture. Rapamycin is a potent and specific mTOR inhibitor.
    Rapamycin (GMP Like)
  • HY-107363
    FT-1518
    Inhibitor 98.62%
    FT-1518 is a new generation selective, potent and oral bioavailable mTORC1 and mTORC2 inhibitor, and exhibits antitumor activity.
    FT-1518
  • HY-139142
    Simufilam
    Inhibitor 98.08%
    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-124582
    NEO214
    Activator ≥98.0%
    NEO214 is an autophagy inhibitor and a covalent conjugate of the PDE4 inhibitor Rolipram (HY-16900) and perillyl alcohol (HY-N7000). It has anti-cancer activity and blood-brain barrier (BBB) permeability. Over sex. NEO214 prevents autophagy-lysosome fusion, thereby blocking autophagic flux and triggering glioma cell death. The process involves mTOR activation, andTFEB(Transcription Factor EB) aggregation. NEO214 inhibitionMacroautophagy/autophagy in glioblastoma cells has the potential to overcome chemotherapy resistance in glioblastoma.
    NEO214
  • HY-162382
    KTC1101
    Inhibitor 98.09%
    KTC1101 is an orally active pan-PI3K inhibitor. KTC1101 can inhibit the PI3K signaling pathway, reduce downstream AKT and mTOR phosphorylation, and reduces the expression of Ki67. The anti-tumor effect of KTC1101 has a dual mechanism of action: directly inhibiting tumor cell growth and dynamically enhancing immune response.
    KTC1101
  • HY-143510
    RMC-4627
    99.20%
    RMC-4627 is a selective mTORC1 inhibitor that activates 4EBP1 and inhibits tumor growth.
    RMC-4627
  • HY-13691
    MKC-1
    Inhibitor 99.78%
    MKC-1 (Ro-31-7453) is an orally active and potent cell cycle inhibitor with broad antitumor activity. MKC-1 inhibits the Akt/mTOR pathway. MKC-1 arrests cellular mitosis and induces cell apoptosis by binding to a number of different cellular proteins including tubulin and members of the importin β family.
    MKC-1
  • HY-12652
    AZD3147
    Inhibitor 99.93%
    AZD3147 is a potent, orally active, selective dual inhibitor of mTORC1 and mTORC2 with an IC50 value of 1.5 nM. AZD3147 also has a selective effect on PI3K.
    AZD3147
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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