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-N2517
    Dihydroevocarpine
    Inhibitor 99.62%
    Dihydroevocarpine induces cytotoxicity in acute myeloid leukemia via suppressing the mTORC1/2 activity.
    Dihydroevocarpine
  • HY-122665A
    HTH-01-091 TFA
    Inhibitor 99.48%
    HTH-01-091 TFA is a potent and selective maternal embryonic leucine zipper kinase (MELK) inhibitor, with an IC50 of 10.5 nM. HTH-01-091 TFA also inhibits PIM1/2/3, RIPK2, DYRK3, smMLCK and CLK2. HTH-01-091 TFA can be uesd for breast cancer research.
    HTH-01-091 TFA
  • HY-156432
    ALK-IN-26
    Inhibitor 99.87%
    ALK-IN-26 is an ALK inhibitor with IC50 value of 7.0 μM for ALK tyrosine kinase. ALK-IN-26 has good pharmacokinetic properties and blood-brain barrier (BBB) permeability. ALK-IN-26 can induce apoptosis, autophagy and necrosis. ALK-IN-26 can be used in glioblastoma studies.
    ALK-IN-26
  • HY-10681R
    Gedatolisib (Standard)
    Inhibitor
    Gedatolisib (Standard) is the analytical standard of Gedatolisib. This product is intended for research and analytical applications. Gedatolisib (PKI-587) is a highly potent dual inhibitor of PI3Kα, PI3Kγ, and mTOR with IC50s of 0.4 nM, 5.4 nM and 1.6 nM, respectively. Gedatolisib is equally effective in both complexes of mTOR, mTORC1 and mTORC2.
    Gedatolisib (Standard)
  • HY-10219S1
    Rapamycin-13C,d3
    Inhibitor
    Rapamycin-13C,d3 (Sirolimus-13C,d3; AY-22989-13C,d3) is the 13C and deuterium labeled Rapamycin (HY-10219).Rapamycin is a potent and specific mTOR inhibitor with an IC50 of 0.1 nM in HEK293 cells. Rapamycin binds to FKBP12 and specifically acts as an allosteric inhibitor of mTORC1. Rapamycin is an autophagy activator, an immunosuppressant.
    Rapamycin-<sup>13</sup>C,d<sub>3</sub>
  • HY-131686
    Ganglioside GT1b
    Activator 98.0%
    Ganglioside GT1b is a member of the ganglioside family. Ganglioside GT1b acts as a protective signal against nerve injury-induced spinal synapse elimination. Ganglioside GT1b induces HA synthesis and the phosphorylation of Akt/mTOR in orbital fibroblasts. Ganglioside GT1b enhances porcine oocyte maturation and induce activation of EGFR and ERK1/2 signaling. Ganglioside GT1b is a putative host cell receptor for the Merkel cell polyomavirus. Ganglioside GT1b can be used for the researches of cancer, infection, immunology, endocrinology and neurological disease, such as Thyroid eye disease.
    Ganglioside GT1b
  • HY-U00326
    PI3Kα/mTOR-IN-1
    Inhibitor 99.30%
    PI3Kα/mTOR-IN-1 is a potent PI3Kα/mTOR dual inhibitor, with an IC50 of 7 nM for PI3Kα in a cell assay, and Kis of 10.6 nM and 12.5 nM for mTOR and PI3Kα in a cell free assay , respectively.
    PI3Kα/mTOR-IN-1
  • HY-15960
    PWT-33597 free base
    Inhibitor
    PWT-33597 (VDC-597) free base is a dual inhibitor of PI3Kα and mTOR, which can effectively block the signaling downstream of PI3K and mTOR. PWT-33597 free base is capable of inducing tumor cell apoptosis and inhibiting tumor growth. PWT-33597 free base has anti-tumor activity and can be used in the research of tumors such as renal cell carcinoma.
    PWT-33597 free base
  • HY-115507
    NMac1
    Inhibitor
    NMac1 is an orally active Nm23/NDPK activator. NMac1 directly binds to Nm23-H1 and activates the NDPK activity of recombinant Nm23-H1 with an EC50 of 10.7 uM. NMac1 induces AMPK activation and inhibits mTOR and ERK, leading to mitochondrial OXPHOS dysregulation and suppressing mitochondrial ROS production, which in turn induces mitochondrial dysfunction in MDA-MB-231 cells. NMac1 inhibits Complex I activity and suppresses changes in morphology and actin cytoskeleton organization following Rac1 activation in MDA-MB-231 cells. NMac1 inhibits tumor invasion, migration and metastasis. NMac1 is useful for studying metastatic tumors, such as breast cancer. NMac1 can be isolated from the ginger cassumunar Roxb.
    NMac1
  • HY-151137
    HSP90/mTOR-IN-1
    Inhibitor
    HSP90/mTOR-IN-1 is a potent and orally active Hsp90 and mTOR inhibitor with IC50 values of 69 nM and 29 nM, respectively. HSP90/mTOR-IN-1 suppresses the proliferation of SW780 cells through the over-activation of the PI3K/AKT/mTOR pathway. HSP90/mTOR-IN-1 induces apoptosis and autophagy via selective Hsp90 and mTOR inhibition. HSP90/mTOR-IN-1 also has considerable in vivo anti-tumor activity. HSP90/mTOR-IN-1 can be used for researching bladder cancer.
    HSP90/mTOR-IN-1
  • HY-139142A
    Simufilam dihydrochloride
    Inhibitor
    Simufilam dihydrochloride (PTI-125 dihydrochloride) is an orally active FLNA modulator. Simufilam dihydrochloride restores NMDAR signaling and Arc expression. Simufilam dihydrochloride inhibits overactive mTOR signaling by restoring the normal conformation of FLNA, improves insulin sensitivity, reduces Aβ42-induced neuroinflammation and tau protein hyperphosphorylation. Simufilam dihydrochloride can be used for research of Alzheimer's disease.
    Simufilam dihydrochloride
  • HY-112602
    PI3K/mTOR Inhibitor-1
    Inhibitor
    PI3K/mTOR Inhibitor-1 is a potent, orally bioavailable dual PI3K/mTOR inhibitor with IC50s of 20/376/204/46 nM and 186 nM for PI3Kα/PI3Kβ/PI3Kγ/PI3Kδ and mTOR, respectively. Antitumor activity.
    PI3K/mTOR Inhibitor-1
  • HY-B0725A
    Doxepin
    Doxepin inhibits reuptake of serotonin and norepinephrine as a tricyclic antidepressant. Doxepin has therapeutic effects in atopic dermatitis,chronic urticarial,can improve cognitive processes, protect central nervous system. Doxepin has also been proposed as a protective factor against oxidative stress.
    Doxepin
  • HY-B1232A
    Metyrapone Tartrate
    Modulator
    Metyrapone (Su-4885) Tartrate is a potent and orally active 11β-hydroxylase inhibitor and an autophagy activator, also inhibits the production of aldosterone. Metyrapone Tartrate inhibits synthesis of endogenous adrenal corticosteroid, decreases glucocorticoid levels, and also affects behavior and emotion. In addition, Metyrapone Tartrate increases the efficiency of autophagic process via downregulation of mTOR pathway, and interacts with Pseudomonas putida cytochrome P-450. Metyrapone Tartrate can be used for researching Cushing's syndrome and depression.
    Metyrapone Tartrate
  • HY-15960A
    PWT-33597
    Inhibitor
    PWT-33597 (VDC-597) is a dual inhibitor of PI3Kα and mTOR, which can effectively block the signaling downstream of PI3K and mTOR. PWT-33597 is capable of inducing tumor cell apoptosis and inhibiting tumor growth. PWT-33597 has anti-tumor activity and can be used in the research of tumors such as renal cell carcinoma.
    PWT-33597
  • HY-111370
    mTOR inhibitor-2
    Inhibitor
    mTOR inhibitor-2 is a highlt potent, selective and oral mTOR inhibitor with an IC50 of 7 nM. mTOR inhibitor-2 inhibits cellular phosphorylation of mTORC1 (pS6 and p4E-BP1) and mTORC2 (pAKT (S473)) substrates.
    mTOR inhibitor-2
  • HY-N0486S11
    L-Leucine-d
    Activator
    L-Leucine-d is the deuterium labeled L-Leucine. L-Leucine is an essential branched-chain amino acid (BCAA), which activates the mTOR signaling pathway.
    L-Leucine-d
  • HY-159517
    PI3K/Akt/mTOR-IN-5
    Inhibitor
    PI3K/Akt/mTOR-IN-5 (compound D3) is a derivative of Pseudolaric Acid B (HY-N6939) with anti-tumor activity. PI3K/Akt/mTOR-IN-5 inhibits excessive proliferation of tumor cells through the PI3K/AKT/mTOR and STAT3/GPX4 pathways. PI3K/Akt/mTOR-IN-5 effectively inhibits EDU positivity, reduces colony formation, places HCT-116 cells in the S phase and G2/M phase, and induces apoptosis.
    PI3K/Akt/mTOR-IN-5
  • HY-169100
    Antiproliferative agent-57
    Antiproliferative agent-57 (compound M2) is a tumor angiogenesis inhibitor. Antiproliferative agent-57 inhibits the secretion of VEGF in SiHa cells under hypoxic conditions (IC50=0.68 μM) without inducing cytotoxicity. Antiproliferative agent-57 can modulate the PI3K/AKT/mTOR and MAPK signaling pathways in tumor cells to inhibit the expression of HIF-1α and VEGF in tumor tissues.
    Antiproliferative agent-57
  • HY-147285
    PI3K/mTOR Inhibitor-9
    Inhibitor
    PI3K/mTOR Inhibitor-9 (Compound 1) is a potent mTOR and PI3K inhibitor with IC50 values of 38 nM, 6.6 μM, 6.6 μM and 0.8 μM against mTOR (phospho-S6 cellular assay), PI3Kα, PI3Kγ and PI3Kδ, respectively.
    PI3K/mTOR Inhibitor-9
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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