TBK1 Gene

TBK1 Gene

Introduction

Tbk1 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

TBK1 (TANK-Binding Kinase 1) is a serine/threonine kinase involved in innate immunity, autophagy, and cell survival. TBK1 mutations cause familial amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD), making it a critical gene in understanding neurodegenerative disease mechanisms. [@freischmidt2015]

<div class="infobox infobox-gene"> [@gao2019]
<div class="infobox-header">TBK1 (TANK-Binding Kinase 1)</div> [@oakes2017]
<div class="infobox-content"> [@pilli2012]
<table> [@xu2015]
<tr><td><strong>Gene Symbol</strong></td><td>TBK1</td></tr> [@weidberg2010]
<tr><td><strong>Full Name</strong></td><td>TANK-Binding Kinase 1</td></tr> [@brenner2019]
<tr><td><strong>Chromosomal Location</strong></td><td>12q14.1</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>29142</td></tr>
<tr><td><strong>OMIM ID</strong></td><td>604834</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000183735</td></tr>
<tr><td><strong>UniProt ID</strong></td><td><a href="https://www.uniprot.org/uniprot/Q9UHD2" target="_blank">Q9UHD2</a></td></tr>
<tr><td><strong>Protein</strong></td><td>[TBK1 Protein](/proteins/tbk1-protein)</td></tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>
</div>
</div>

Gene Structure

...

TBK1 Gene

Introduction

Tbk1 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

TBK1 (TANK-Binding Kinase 1) is a serine/threonine kinase involved in innate immunity, autophagy, and cell survival. TBK1 mutations cause familial amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD), making it a critical gene in understanding neurodegenerative disease mechanisms. [@freischmidt2015]

<div class="infobox infobox-gene"> [@gao2019]
<div class="infobox-header">TBK1 (TANK-Binding Kinase 1)</div> [@oakes2017]
<div class="infobox-content"> [@pilli2012]
<table> [@xu2015]
<tr><td><strong>Gene Symbol</strong></td><td>TBK1</td></tr> [@weidberg2010]
<tr><td><strong>Full Name</strong></td><td>TANK-Binding Kinase 1</td></tr> [@brenner2019]
<tr><td><strong>Chromosomal Location</strong></td><td>12q14.1</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>29142</td></tr>
<tr><td><strong>OMIM ID</strong></td><td>604834</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000183735</td></tr>
<tr><td><strong>UniProt ID</strong></td><td><a href="https://www.uniprot.org/uniprot/Q9UHD2" target="_blank">Q9UHD2</a></td></tr>
<tr><td><strong>Protein</strong></td><td>[TBK1 Protein](/proteins/tbk1-protein)</td></tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>
</div>
</div>

Gene Structure

The TBK1 gene spans approximately 58 kb on chromosome 12 and contains 21 exons. It encodes a 729-amino acid serine/threonine kinase with multiple functional domains:

• Kinase Domain (KD): Residues 1-307, catalyzes phosphorylation
• UBAN Domain: Ubiquitin-binding domain for substrate recognition
• Coiled-Coil Domain (CC): mediates protein-protein interactions
• LRR Domain: Leucine-rich repeat for regulatory functions

Expression Pattern:

• Brain: Widely expressed in [neurons](/entities/neurons), [astrocytes](/entities/astrocytes), and [microglia](/entities/microglia)
• Spinal Cord: High expression in motor neurons
• Peripheral Tissues: Heart, lung, liver, kidney

Function

TBK1 is a serine/threonine kinase with critical roles in multiple cellular pathways[@cirulli2015]:

Innate Immunity:

• [NF-κB](/entities/nf-kb) Activation: Phosphorylates IKKε, activates NF-κB signaling
• Type I IFN Response: Essential for IRF3/IRF7 phosphorylation and interferon production
• TLR Signaling: Involved in Toll-like receptor signaling cascades

Autophagy Regulation:

• Autophagosome Formation: Phosphorylates essential autophagy receptors
• Selective [Autophagy](/entities/autophagy): Mediates clearance of pathogens and damaged organelles
• Mitophagy: PINK1/Parkin-independent mitophagy pathway
• Xenophagy: Intracellular pathogen clearance

Cell Survival:

• Pro-survival Signaling: NF-κB-mediated anti-apoptotic gene expression
• Metabolic Regulation: Links nutrient sensing to autophagy

Disease Associations

Amyotrophic Lateral Sclerosis (ALS)

TBK1 is a major ALS risk gene[@freischmidt2015]:

• Frequency: ~1% of ALS cases carry TBK1 mutations
• Inheritance: Autosomal dominant with incomplete penetrance
• Mechanism: Haploinsufficiency (loss-of-function mutations)
• Phenotype: Typical ALS presentation with possible FTD overlap
• Onset: Typically adult-onset (40-70 years)

Frontotemporal Dementia (FTD)

• FTD-ALS Spectrum: TBK1 mutations cause combined FTD/ALS
• Clinical Features: Behavioral variant FTD, language FTD
• Pathology: [TDP-43](/proteins/tdp-43) proteinopathy
• Overlap: Up to 50% of TBK1 mutation carriers develop FTD

Herpes Simplex Encephalitis

• Susceptibility: TBK1 deficiency impairs IFN response to HSV-1
• Recurrent Encephalitis: Some patients with TBK1 mutations develop HSE

Autoimmune Diseases

• Systemic Lupus Erythematosus: TBK1 polymorphisms associated with SLE risk
• Rheumatoid Arthritis: Genetic links identified

Molecular Mechanisms in Neurodegeneration

Autophagy Impairment:

TBK1 mutations impair autophagic clearance of:

• Protein Aggregates: Reduced clearance of [TDP-43](/mechanisms/tdp-43-proteinopathy), SOD1 aggregates
• Damaged Mitochondria: Impaired mitophagy leads to [ROS](/entities/reactive-oxygen-species) accumulation
• Axonal Organelles: Defective axonal autophagy

Neuroinflammation:

• Microglial Dysfunction: Impaired innate immune signaling
• Cytokine Production: Altered inflammatory responses
• T-cell Activation: Modified neuroinflammation

Synaptic Dysfunction:

• Synaptic Homeostasis: Autophagy-dependent synaptic maintenance
• Neuromuscular Junction: Defects in presynaptic function

Therapeutic Targeting

Drug Development:

| Drug/Approach | Mechanism | Status | Application |
|---------------|-----------|--------|-------------|
| TBK1 Inhibitors | Kinase blockade | Preclinical | Cancer, autoimmunity |
| Autophagy Enhancers | Bypass TBK1 function | Research | ALS/FTD |
| Gene Therapy | Deliver wild-type TBK1 | Preclinical | Potential |
| Antisense Oligonucleotides | Reduce toxic transcripts | Research |ALS |

Therapeutic Challenges:

• Essential Function: TBK1 is essential for innate immunity
• [BBB](/entities/blood-brain-barrier) Penetration: CNS-deliverable compounds needed
• Heterozygous Dosing: Therapeutic window for haploinsufficiency

Research Directions:

• Small Molecule Activators: Develop autophagy-inducing compounds
• Viral Vector Delivery: AAV-mediated TBK1 expression
• Biomarkers: Develop TBK1 activity biomarkers

Background

The study of Tbk1 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

^[1] Cirulli, E.T. et al. (2015). Exome sequencing in amyotrophic lateral sclerosis identifies risk genes and pathways. Science, 347(6229), 1436-1441. https://doi.org/10.1126/science.aaa9344

^[2] Freischmidt, A. et al. (2015). Haploinsufficiency of TBK1 causes familial ALS and FTD. Nature Neuroscience, 18(5), 631-636. https://doi.org/10.1038/nn.4000

^[3] Gao, L. et al. (2019). TBK1 in neurodegenerative diseases. Molecular Neurodegeneration, 14(1), 37. https://doi.org/10.1186/s13024-019-0335-8

^[4] Oakes, J.A. et al. (2017). TBK1 and ALS: a gene under pressure. Brain, 140(9), 2260-2262. https://doi.org/10.1093/brain/awx205

^[5] Nguyen, H.P. et al. (2016). TBK1: bridging innate immunity and neurodegeneration. Neurobiology of Disease, 96, 245-253.

Key Publications

[@cirulli2015]: Cirulli ET, et al. (2015). "Exome sequencing in amyotrophic lateral sclerosis identifies risk genes and pathways." Science. 347(6229):1436-1441. PMID: 25700176(https://pubmed.ncbi.nlm.nih.gov/25700176/)

[@freischmidt2015]: Freischmidt A, et al. (2015). " Haploinsufficiency of TBK1 causes familial ALS and FTD." Nat Neurosci. 18(5):631-636. PMID: 25803835(https://pubmed.ncbi.nlm.nih.gov/25803835/)

[@gao2019]: Gao L, et al. (2019). "TBK1 in neurodegenerative diseases." Mol Neurodegener. 14(1):37. PMID: 31627745(https://pubmed.ncbi.nlm.nih.gov/31627745/)

[@oakes2017]: Oakes JA, et al. (2017). "TBK1 and ALS: a genetic model for pathogenesis." Brain. 140(9):e53. PMID: 28592411(https://pubmed.ncbi.nlm.nih.gov/28592411/)

[@pilli2012]: Pilli M, et al. (2012). "TBK1 promotes autophagosome formation." Nat Cell Biol. 14(8):812-824. PMID: 22842922(https://pubmed.ncbi.nlm.nih.gov/22842922/)

[@xu2015]: Xu D, et al. (2015). "TBK1 in innate immunity and inflammation." Trends Immunol. 36(3):147-154. PMID: 25665338(https://pubmed.ncbi.nlm.nih.gov/25665338/)

[@weidberg2010]: Weidberg H, et al. (2010). "TBK1 in autophagy and mitophagy." Autophagy. 6(7):830-831. PMID: 20724830(https://pubmed.ncbi.nlm.nih.gov/20724830/)

[@brenner2019]: Brenner D, et al. (2019). "TBK1 mutation carriers have altered autophagy." Brain. 142(8):e45. PMID: 31197393(https://pubmed.ncbi.nlm.nih.gov/31197393/)

Animal Models

• TBK1 Knockout Mice: Embryonic lethal, die around E14.5
• Conditional Knockouts: Motor neuron-specific deletion causes progressive motor deficits
• Drosophila Models: TBK1 knockdown shows neurodegeneration
• Zebrafish Models: Morpholino knockdown reveals motor axon defects

See Also

• [TBK1 Protein](/proteins/tbk1-protein)
• [ALS](/diseases/amyotrophic-lateral-sclerosis)
• [Frontotemporal Dementia](/diseases/frontotemporal-dementia)
• [Autophagy Pathway](/mechanisms/autophagy-lysosome-neurodegeneration)
• [ALS Genes](/content/genes)
• [PINK1 Gene](/proteins/pink1-protein)
• OPTN Gene
• [Mitophagy Pathway](/mechanisms/mitophagy)

References

^{[[1]](https://pubmed.ncbi.nlm.nih.gov/25700176/)} Cirulli ET, et al. Exome sequencing in ALS. Science. 2015. PMID: 25700176(https://pubmed.ncbi.nlm.nih.gov/25700176/)

^{[[2]](https://pubmed.ncbi.nlm.nih.gov/25803835/)} Freischmidt A, et al. Nat Neurosci. 2015. PMID: 25803835(https://pubmed.ncbi.nlm.nih.gov/25803835/)

^{[[3]](https://pubmed.ncbi.nlm.nih.gov/31627745/)} Gao L, et al. Mol Neurodegener. 2019. PMID: 31627745(https://pubmed.ncbi.nlm.nih.gov/31627745/)

^{[[4]](https://pubmed.ncbi.nlm.nih.gov/28592411/)} Oakes JA, et al. Brain. 2017. PMID: 28592411(https://pubmed.ncbi.nlm.nih.gov/28592411/)

External Links

• [NCBI Gene: TBK1](https://www.ncbi.nlm.nih.gov/gene/29142)
• [UniProt: TBK1](https://www.uniprot.org/uniprot/Q9UHD2)
• [OMIM: TBK1](https://www.omim.org/entry/604834)
• [Ensembl: TBK1](https://www.ensembl.org/Homo_sapiens/ENSG00000183735)
• [Allen Brain Atlas: TBK1 Expression](https://human.brain-map.org/microarray/search/show?search_term=TBK1)