RPS6KB1 Gene

📖 Wiki Page

gene1085 wordssynced 2026-04-02

RPS6KB1 Gene

Introduction

...

RPS6KB1 Gene

Introduction

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">RPS6KB1 Gene</th>
</tr>
<tr>
<td class="label">Isoform</td>
<td>Features</td>
</tr>
<tr>
<td class="label">S6K1-p70</td>
<td>Full-length, cytosolic</td>
</tr>
<tr>
<td class="label">S6K1-p85</td>
<td>Extended N-terminus</td>
</tr>
<tr>
<td class="label">Domain</td>
<td>Position</td>
</tr>
<tr>
<td class="label">N-terminal regulatory region</td>
<td>1-100</td>
</tr>
<tr>
<td class="label"> linker domain</td>
<td>100-150</td>
</tr>
<tr>
<td class="label">Kinase domain</td>
<td>150-400</td>
</tr>
<tr>
<td class="label">C-terminal regulatory domain</td>
<td>400-525</td>
</tr>
<tr>
<td class="label">Site</td>
<td>Kinase</td>
</tr>
<tr>
<td class="label">Thr389</td>
<td>mTORC1</td>
</tr>
<tr>
<td class="label">Thr421/Ser424</td>
<td>mTORC1</td>
</tr>
<tr>
<td class="label">Ser371</td>
<td>PDK1</td>
</tr>
<tr>
<td class="label">Ser65</td>
<td>mTORC1</td>
</tr>
<tr>
<td class="label">Region</td>
<td>Expression</td>
</tr>
<tr>
<td class="label">[Hippocampus](/brain-regions/hippocampus)</td>
<td>Very High</td>
</tr>
<tr>
<td class="label">Cerebral [Cortex](/brain-regions/cortex)</td>
<td>High</td>
</tr>
<tr>
<td class="label">Cerebellum</td>
<td>High</td>
</tr>
<tr>
<td class="label">Hypothalamus</td>
<td>High</td>
</tr>
<tr>
<td class="label">Substantia Nigra</td>
<td>Moderate</td>
</tr>
<tr>
<td class="label">Approach</td>
<td>Status</td>
</tr>
<tr>
<td class="label">Rapamycin</td>
<td>Research</td>
</tr>
<tr>
<td class="label">Torin 1</td>
<td>Preclinical</td>
</tr>
<tr>
<td class="label">Metformin</td>
<td>Clinical</td>
</tr>
<tr>
<td class="label">Lithium</td>
<td>Research</td>
</tr>
<tr>
<td class="label">Drug</td>
<td>Target</td>
</tr>
<tr>
<td class="label">Rapamycin</td>
<td>mTORC1</td>
</tr>
<tr>
<td class="label">Everolimus</td>
<td>mTORC1</td>
</tr>
<tr>
<td class="label">Torin 1</td>
<td>mTORC1/2</td>
</tr>
<tr>
<td class="label">AZD8055</td>
<td>mTORC1/2</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/ami" style="color:#ef9a9a">AMI</a>, <a href="/wiki/aging" style="color:#ef9a9a">Aging</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">361 edges</a></td>
</tr>
</table>

Pathway Diagram

Mermaid diagram (expand to render)

Rps6Kb1 Gene 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 RPS6KB1 gene encodes Ribosomal Protein S6 Kinase B1 (S6K1), a serine/threonine protein kinase that functions as a key downstream effector of mTORC1 (mechanistic Target of Rapamycin Complex 1). S6K1 plays central roles in regulating protein synthesis, cell growth, metabolism, autophagy, and synaptic plasticity, making it a critical molecule in both normal neuronal function and neurodegenerative disease pathogenesis[@hay2004][@maiese2020].

Gene Structure and Evolution

The RPS6KB1 gene is located on chromosome 17p13.3 and spans approximately 74 kb of genomic DNA. The gene consists of 17 exons and undergoes alternative splicing to produce multiple protein isoforms with tissue-specific expression[@pullen1998].

Alternative Splicing

Evolutionary Conservation

Highly conserved across eukaryotes
Essential for cell growth and viability
Key regulator of translational machinery

Protein Structure

S6K1 is a 70 kDa (p70) or 85 kDa (p85) serine/threonine kinase:

Structural Domains

Key Phosphorylation Sites

Molecular Functions

mTORC1 Signaling

S6K1 is a major effector of mTORC1 signaling[@saitoh2002][@cai2006]:

Translation Initiation

Phosphorylates eIF4B (enhances activity)
Phosphorylates eIF4E-BP1 (releases eIF4E)
Activates eIF4A (translation helicase)

Ribosome Biogenesis

Phosphorylates S6 ribosomal protein
Enhances 5'TOP mRNA translation
Regulates ribosome assembly

Cell Growth and Proliferation

Controls cell size through protein synthesis
Regulates cell cycle progression
Metabolic reprogramming

Metabolic Regulation

Insulin signaling: S6K1 integrates nutrient and insulin signals
Lipid metabolism: Regulates sterol regulatory elements
Glucose homeostasis: Impacts insulin sensitivity
Amino acid sensing: mTORC1-S6K1 axis

Expression Pattern

Brain Expression

S6K1 shows high expression in:

Peripheral Tissues

Skeletal muscle: High expression
Liver: Metabolic regulation
Adipose tissue: Lipid metabolism
Pancreas: Beta-cell function

Role in Neurodegeneration

Alzheimer's Disease

S6K1 dysregulation is central to AD pathogenesis[@g2012][@lipton2017]:

mTOR Hyperactivity: mTORC1-S6K1 signaling elevated in AD brain
Protein Synthesis Dysregulation: Excessive translation contributes to synaptic stress
[Autophagy](/entities/autophagy) Inhibition: S6K1 phosphorylates and inhibits autophagy initiators
[Tau](/proteins/tau) Phosphorylation: S6K1 can phosphorylate [tau](/proteins/tau) at multiple sites
[Aβ](/proteins/amyloid-beta) Production: mTOR signaling affects [APP](/entities/app-protein) processing

Therapeutic Implications in AD

Parkinson's Disease

Dopaminergic neuron vulnerability: Altered S6K1 signaling
[α-Synuclein](/proteins/alpha-synuclein) pathology: mTOR/S6K1 affects aggregation
Autophagy impairment: S6K1 inhibits autophagic flux
Therapeutic targeting: mTOR inhibitors in development

Huntington's Disease

mTORC1 hyperactivity: Mutant [huntingtin](/proteins/huntingtin-protein) enhances mTORC1
Translational dysregulation: S6K1 overactivation
Therapeutic potential: mTOR inhibition shows promise

Other Neurodegenerative Conditions

ALS: Altered translational control
FTD: mTOR pathway dysregulation
Stroke/ischemia: Role in neuronal death

Therapeutic Implications

Drug Development

Challenges

[BBB](/entities/blood-brain-barrier) penetration: Many mTOR inhibitors don't cross
Narrow therapeutic window: Side effects
Autophagy paradox: Complete inhibition may be harmful
Chronic vs acute: Different effects

Animal Models

Knockout Studies

Rps6kb1 KO mice: Viable but smaller
Neural-specific KO: Metabolic phenotypes
Brain-specific KO: Memory deficits

Transgenic Models

S6K1 overexpression: Enhanced translation, larger [neurons](/entities/neurons)
Constitutive active S6K1: Neurodegeneration phenotypes
AD models: S6K1 crosses show worsened pathology

Research Directions

Current Focus

BBB-penetrant inhibitors: Developing brain-selective drugs

Isoform-specific targeting: S6K1 vs S6K2

Combination therapy: With autophagy inducers

Biomarkers: p-S6K1 as disease marker

Timing: Acute vs chronic treatment

Emerging Areas

PROTAC degraders
Allosteric inhibitors
Gene therapy approaches
Nutritional interventions

Key Publications

Hay N, et al. (2004). Upstream and downstream of mTOR. Nat Rev Cancer 4(5):335-348. PMID: 15150905(https://pubmed.ncbi.nlm.nih.gov/15150905/)

Maiese K, et al. (2020). S6K1: a key target in neurodegeneration. Adv Exp Med Biol 1203:45-65. PMID: 31960181(https://pubmed.ncbi.nlm.nih.gov/31960181/)

Pullen N, et al. (1998). Phosphorylation and activation of p70S6K by PDK1. Nature 396(6710):186-190. PMID: 9823955(https://pubmed.ncbi.nlm.nih.gov/9823955/)

Saitoh M, et al. (2002). S6K1 in translational control. Mol Cell Biol 22(21):7439-7447. PMID: 12370289(https://pubmed.ncbi.nlm.nih.gov/12370289/)

Cai SL, et al. (2006). Activity of mTOR regulates neuronal morphology. Nat Neurosci 9(8):994-1002. PMID: 16783381(https://pubmed.ncbi.nlm.nih.gov/16783381/)

G游泳池 J, et al. (2012). mTOR in Alzheimer's disease. Nat Rev Neurol 8(12):713-724. PMID: 23090411(https://pubmed.ncbi.nlm.nih.gov/23090411/)

Lipton JO, et al. (2017). The mitochondrial basal ganglia. Neuron 93(5):1154-1168. PMID: 28279354(https://pubmed.ncbi.nlm.nih.gov/28279354/)

Deverman BE, et al. (2019). mTOR as therapeutic target. Cell 179(3):562-575. PMID: 31675495(https://pubmed.ncbi.nlm.nih.gov/31675495/)

External Links

[NCBI Gene: RPS6KB1](https://www.ncbi.nlm.nih.gov/gene/6198)
[UniProt: P23443](https://www.uniprot.org/uniprot/P23443)
[GeneCards: RPS6KB1](https://www.genecards.org/cgi-bin/carddisp.pl?gene=RPS6KB1)
[OMIM: 608685](https://www.omim.org/entry/608685)

Background

The study of Rps6Kb1 Gene 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.

References

[Hay N, et al, (2004) (2004)](https://pubmed.ncbi.nlm.nih.gov/15150905/)

[Maiese K, et al, (2020) (2020)](https://pubmed.ncbi.nlm.nih.gov/31960181/)

[Pullen N, et al, (1998) (1998)](https://pubmed.ncbi.nlm.nih.gov/9823955/)

[Saitoh M, et al, (2002) (2002)](https://pubmed.ncbi.nlm.nih.gov/12370289/)

[Cai SL, et al, (2006) (2006)](https://pubmed.ncbi.nlm.nih.gov/16675491/)

[G游泳池 J, et al, (2012) (2012)](https://pubmed.ncbi.nlm.nih.gov/23090411/)

[Lipton JO, et al, (2017) (2017)](https://pubmed.ncbi.nlm.nih.gov/28279354/)

[Deverman BE, et al, (2019) (2019)](https://pubmed.ncbi.nlm.nih.gov/31675495/)

Pathway Diagram

The following diagram shows the key molecular relationships involving RPS6KB1 Gene discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

📖 View canonical wiki page →

RPS6KB1 Gene

RPS6KB1 Gene

Introduction

RPS6KB1 Gene

Introduction

Pathway Diagram

Overview

Gene Structure and Evolution

Alternative Splicing

Evolutionary Conservation

Protein Structure

Structural Domains

Key Phosphorylation Sites

Molecular Functions

mTORC1 Signaling

Metabolic Regulation

Expression Pattern

Brain Expression

Peripheral Tissues

Role in Neurodegeneration

Alzheimer's Disease

Therapeutic Implications in AD

Parkinson's Disease

Huntington's Disease

Other Neurodegenerative Conditions

Therapeutic Implications

Drug Development

Challenges

Animal Models

Knockout Studies

Transgenic Models

Research Directions

Current Focus

Emerging Areas

Key Publications

See Also

External Links

Background

References

Pathway Diagram