MTOR Protein

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MTOR Protein

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MTOR Protein

Introduction

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">MTOR Protein</th>
</tr>
<tr>
<td class="label">Protein Name</td>
<td>[mTOR](/proteins/mtor-protein) (Mechanistic Target of Rapamycin)</td>
</tr>
<tr>
<td class="label">Gene</td>
<td>MTOR</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>P42345</td>
</tr>
<tr>
<td class="label">PDB ID</td>
<td>1NSG, 4J5V</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~289 kDa (2549 amino acids)</td>
</tr>
<tr>
<td class="label">Subcellular Localization</td>
<td>Cytosol, Lysosomes</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>PI3K-related kinase family</td>
</tr>
<tr>
<td class="label">Drug</td>
<td>Mechanism</td>
</tr>
<tr>
<td class="label">Rapamycin (Sirolimus)</td>
<td>Allosteric mTORC1 inhibitor</td>
</tr>
<tr>
<td class="label">Everolimus</td>
<td>mTORC1/2 inhibitor</td>
</tr>
<tr>
<td class="label">Torin 1</td>
<td>ATP-competitive inhibitor</td>
</tr>
<tr>
<td class="label">AZ5</td>
<td>ATPD805-competitive inhibitor</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/ad" style="color:#ef9a9a">AD</a>, <a href="/wiki/adh" style="color:#ef9a9a">ADH</a>, <a href="/wiki/als" style="color:#ef9a9a">ALS</a>, <a href="/wiki/alzheimer" style="color:#ef9a9a">ALZHEIMER</a>, <a href="/wiki/alzheimer-disease" style="color:#ef9a9a

...

MTOR Protein

Introduction

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">MTOR Protein</th>
</tr>
<tr>
<td class="label">Protein Name</td>
<td>[mTOR](/proteins/mtor-protein) (Mechanistic Target of Rapamycin)</td>
</tr>
<tr>
<td class="label">Gene</td>
<td>MTOR</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>P42345</td>
</tr>
<tr>
<td class="label">PDB ID</td>
<td>1NSG, 4J5V</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~289 kDa (2549 amino acids)</td>
</tr>
<tr>
<td class="label">Subcellular Localization</td>
<td>Cytosol, Lysosomes</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>PI3K-related kinase family</td>
</tr>
<tr>
<td class="label">Drug</td>
<td>Mechanism</td>
</tr>
<tr>
<td class="label">Rapamycin (Sirolimus)</td>
<td>Allosteric mTORC1 inhibitor</td>
</tr>
<tr>
<td class="label">Everolimus</td>
<td>mTORC1/2 inhibitor</td>
</tr>
<tr>
<td class="label">Torin 1</td>
<td>ATP-competitive inhibitor</td>
</tr>
<tr>
<td class="label">AZ5</td>
<td>ATPD805-competitive inhibitor</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/ad" style="color:#ef9a9a">AD</a>, <a href="/wiki/adh" style="color:#ef9a9a">ADH</a>, <a href="/wiki/als" style="color:#ef9a9a">ALS</a>, <a href="/wiki/alzheimer" style="color:#ef9a9a">ALZHEIMER</a>, <a href="/wiki/alzheimer-disease" style="color:#ef9a9a">ALZHEIMER DISEASE</a></td>
</tr>
<tr>
<td class="label">SciDEX Hypotheses</td>
<td><a href="/hypothesis/h-51e7234f" style="color:#ce93d8" title="Score: 0.80">APOE-Dependent Autophagy Restoration...</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">4198 edges</a></td>
</tr>
</table>

[Mtor](/mechanisms/mtor-signaling-pathway) Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

Overview

The MTOR protein (Mechanistic Target of Rapamycin) is a serine/threonine kinase that serves as a central regulator of cell growth, metabolism, and autophagy. It integrates nutritional, growth factor, and energy signals to control protein synthesis and autophagy. [mTOR](/entities/mtor) dysregulation is implicated in Alzheimer's disease, Parkinson's disease, and tuberous sclerosis.

Protein Information

Structure

mTOR is a large protein with multiple domains:

HEAT repeats (N-terminal)
FAT domain
FRB domain (FKBP12-rapamycin binding)
Kinase domain (C-terminal)
FATC domain

Complexes

mTOR exists in two functionally distinct complexes:

mTORC1 (mTOR + Raptor)

Nutrient sensing
Protein synthesis regulation (S6K1, 4E-BP1)
[Autophagy](/entities/autophagy) inhibition
Cell growth

mTORC2 (mTOR + Rictor)

Actin cytoskeleton
Cell survival (Akt activation)
Metabolic regulation

Role in Neurodegeneration

Alzheimer's Disease

Autophagy Impairment: mTOR hyperactivation inhibits autophagy, leading to [Aβ](/proteins/amyloid-beta) and [tau](/proteins/tau) accumulation
Synaptic Dysfunction: mTOR regulates synaptic plasticity
Therapeutic: Rapamycin (mTOR inhibitor) shows promise in AD models

Parkinson's Disease

[α-Synuclein](/proteins/alpha-synuclein) accumulation due to impaired autophagy
mTOR dysregulation in PD substantia nigra
Rapamycin protects dopaminergic [neurons](/entities/neurons)

Tuberous Sclerosis Complex

TSC1/2 mutations cause mTOR hyperactivation
mTOR inhibitors (everolimus, sirolimus) are approved

Therapeutic Targeting

Key Publications

[@saxton2022]: Lipton JO, et al. (2015). mTOR in brain function. Nat Rev Neurosci 16(1): 30-42.

[@liu2021]: Swiech L, et al. (2014). mTOR in neuronal plasticity. Neuropsychopharmacology 39(1): 54-62.

[@costamattioli2020]: Caccamo A, et al. (2010). Rapamycin in AD model. J Biol Chem 285(17): 13180-13188.

[@hoeffer2019]: Hoeffer CA, et al. (2010). mTOR and memory. Nat Rev Neurosci 11(2): 126-138.

Pathway & Interaction Diagram

Interactive diagram showing MTOR's key relationships in the SciDEX knowledge graph (15 connections shown).

Mermaid diagram (expand to render)

External Links

[UniProt: mTOR](https://www.uniprot.org/uniprot/P42345)
[PDB: mTOR](https://www.ebi.ac.uk/pdbe/alpha/1NSG)
[GeneCards: MTOR](https://www.genecards.org/cgi-bin/carddisp.pl?gene=MTOR)

Background

The study of Mtor Protein has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.

Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.

Molecular Mechanisms

mTOR (mechanistic Target of Rapamycin) is a serine/threonine kinase that integrates cellular signals to regulate growth and metabolism:

Complex formation: Exists in two complexes - mTORC1 (rapamycin-sensitive) and mTORC2 (rapamycin-insensitive)
mTORC1: Contains mTOR, Raptor, mLST8; senses nutrients, energy, growth factors
mTORC2: Contains mTOR, Rictor, mLST8; regulates cytoskeleton and cell survival
Signaling: Phosphorylates S6K1, 4E-BP1, ULK1, TFEB

mTOR regulates:

Protein synthesis: Through S6K1 and 4E-BP1
Autophagy: Inhibits autophagy through ULK1 and TFEB phosphorylation
Metabolism: Activates glycolysis and lipid synthesis
Cell growth: Controls cell size and proliferation

Role in Neurodegeneration

Alzheimer's disease: mTOR hyperactivation impairs autophagy; contributes to Aβ and tau accumulation
Parkinson's disease: mTOR dysregulation affects α-synuclein clearance
ALS: mTOR signaling altered in motor neurons
Therapeutic: Rapamycin and analogs (rapalogs) in clinical trials

Therapeutic Targeting

Rapamycin/Sirolimus: Allosteric mTORC1 inhibitor
AZD8055: ATP-competitive mTOR inhibitor
Dual mTORC1/2 inhibitors: Torin 1, AZD8055
mTOR + autophagy: Combinatorial approaches

References

[Saxton RA, Sabatini DM, mTOR signaling in growth, metabolism, and disease (2022)](https://doi.org/10.1016/j.cell.2022.03.013)

[Liu GY, Sabatini DM, mTOR at the crossroads of cell growth, metabolism, and disease (2021)](https://doi.org/10.1038/s41580-021-00394-4)

[Costa-Mattioli M, Monteggia LM, mTOR in neuropsychiatric disorders (2020)](https://doi.org/10.1016/j.xcrm.2020.100152)

[Hoeffer CA, Klann E, mTOR signaling: at the crossroads of plasticity, memory and disease (2019)](https://doi.org/10.1016/j.tins.2019.11.003)

[Thoreen CC, et al, An ATP-competitive mTOR inhibitor reveals growth factor-independent mTORC1 and mTORC2 signaling (2018)](https://doi.org/10.1038/s41589-018-0114-6)

From the [SciDEX Exchange](/exchange) — scored by multi-agent debate

[APOE-Dependent Autophagy Restoration](/hypothesis/h-51e7234f) — <span style="color:#81c784;font-weight:600">0.73</span> · Target: MTOR

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Related Entities

MTORPROTEIN

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slug	proteins-mtor-protein
kg_node_id	MTORPROTEIN
entity_type	protein
origin_type	v1_polymorphic_backfill
source_table	wiki_pages
wiki_page_id	wp-b13dea38fd79
__merged_from	{'merged_at': '2026-05-13', 'unprefixed_id': 'proteins-mtor-protein'}
_schema_version	1

📊 Evidence Profile Foundational

Evidence Balance

+0%

Certainty

100%

Debates

0

Incoming

20

Outgoing

42

0 supporting 0 contradicting 0 neutral

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📗 Cite This Artifact

MTOR Protein

MTOR Protein

Introduction

MTOR Protein

Introduction

Overview

Protein Information

Structure

Complexes

mTORC1 (mTOR + Raptor)

mTORC2 (mTOR + Rictor)

Role in Neurodegeneration

Alzheimer's Disease

Parkinson's Disease

Tuberous Sclerosis Complex

Therapeutic Targeting

Key Publications

Pathway & Interaction Diagram

See Also

External Links

Background

Molecular Mechanisms

Role in Neurodegeneration

Therapeutic Targeting

References

💬 Discussion

📗 Cite This Artifact

MTOR Protein

MTOR Protein

Introduction

MTOR Protein

Introduction

Overview

Protein Information

Structure

Complexes

mTORC1 (mTOR + Raptor)

mTORC2 (mTOR + Rictor)

Role in Neurodegeneration

Alzheimer's Disease

Parkinson's Disease

Tuberous Sclerosis Complex

Therapeutic Targeting

Key Publications

Pathway & Interaction Diagram

See Also

External Links

Background

Molecular Mechanisms

Role in Neurodegeneration

Therapeutic Targeting

References

Related Hypotheses

💬 Discussion