TIA1 - TIA1 Cytotoxic Granule Associated RNA Binding Protein

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gene953 wordssynced 2026-04-02

TIA1 - TIA1 Cytotoxic Granule Associated RNA Binding Protein

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">TIA1</th>
</tr>
<tr> [@baloh2017]
<td class="label">Gene Symbol</td> [@klar2013]
<td>TIA1</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>TIA1 Cytotoxic Granule Associated RNA Binding Protein</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>2p16.3</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>4678</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000173166</td>
</tr>
<tr>
<td class="label">OMIM ID</td>
<td>603518</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>P52912</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td>Amyotrophic Lateral Sclerosis (ALS), Welander Distal Myopathy</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>TIA1/TIAR family</td>
</tr>
</table>

TIA1 (TIA1 Cytotoxic Granule Associated RNA Binding Protein)

Introduction

Tia1 Tia1 Cytotoxic Granule Associated Rna Binding 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

...

TIA1 - TIA1 Cytotoxic Granule Associated RNA Binding Protein

TIA1 (TIA1 Cytotoxic Granule Associated RNA Binding Protein)

Introduction

Overview

TIA1 encodes an RNA binding protein that plays critical roles in RNA metabolism, stress granule formation, and translational regulation[@kawakami2000]. TIA1 is a key component of stress granules, cytoplasmic RNA-protein aggregates that form in response to cellular stress[@kedersha1999]. Mutations in TIA1 have been linked to amyotrophic lateral sclerosis (ALS) and related neurodegenerative disorders, highlighting the importance of RNA
homeostasis in motor neuron survival[@mackenzie2017].

TIA1 acts as a translational repressor by promoting the assembly of stress granules and sequestering specific mRNAs during cellular stress. The protein contains multiple RNA
recognition motifs (RRMs) that enable sequence-specific binding to target mRNAs[@anderson2008]. Dysregulation of TIA1 function leads to aberrant stress granule dynamics, which
is increasingly recognized as a pathological mechanism in ALS and Frontotemporal Dementia (FTD)[@baloh2017].

Function

RNA Binding and Translational Regulation

TIA1 contains three RNA recognition motifs (RRMs) that mediate sequence-specific binding to adenine- and uridine-rich elements (AU-rich elements, AREs) in the 3' untranslated regions of target mRNAs[@kawakami2000]. Through these interactions, TIA1:

Represses translation: Promotes translational silencing by recruiting translational repressor complexes

mRNA stabilization: Protects certain mRNAs from degradation

mRNA localization: Facilitates subcellular targeting of specific transcripts

Stress Granule Formation

TIA1 is a canonical stress granule marker and core component of these cytoplasmic aggregates:

Stress granules form in response to various cellular stresses including:
Oxidative stress
Heat shock
Viral infection
ER stress
Energy deprivation
Composition: mRNPs, translation initiation factors, ribosomal subunits, and RNA binding proteins including TIA1, TIAR (TIA1-like), G3BP1, and TTP
Function: Stress granules are thought to:
Protect mRNAs from degradation during stress
Promote selective translation of stress-response proteins
Serve as platforms for signaling events

Role in Neuronal Function

In [neurons](/entities/neurons), TIA1 and stress granules play important roles in:

Synaptic plasticity: Local translational regulation at synapses

Axonal transport: mRNA localization in axons

Stress response: Protection of neuronal protein homeostasis

Axon degeneration: Stress granule dynamics in injury response

Disease Associations

Amyotrophic Lateral Sclerosis (ALS)

TIA1 mutations were first linked to ALS in 2016, and subsequent studies have identified multiple pathogenic variants in patients with both familial and sporadic ALS[@mackenzie2017]. The connection between TIA1 and ALS involves several mechanisms:

Altered stress granule dynamics: ALS-associated mutations affect stress granule assembly, disassembly, and composition

Impaired RNA metabolism: Dysregulation of mRNA processing and translation

Protein homeostasis disruption: Aberrant stress granule accumulation

Cytoplasmic [TDP-43](/proteins/tdp-43) aggregates: Interaction between stress granules and [TDP-43](/mechanisms/tdp-43-proteinopathy) pathology

Frontotemporal Dementia (FTD)

TIA1 is genetically and pathologically linked to FTD, with some patients carrying both TIA1 mutations and FTD phenotypes[@baloh2017]. The overlap between ALS and FTD (ALS-FTD spectrum) suggests common mechanistic pathways involving RNA metabolism.

Welander Distal Myopathy

Recessive TIA1 mutations cause Welander distal myopathy, a late-onset muscle disorder characterized by distal limb weakness[@klar2013]. This highlights the tissue-specific effects of TIA1 dysfunction.

Therapeutic Implications

Understanding TIA1 biology in neurodegeneration opens therapeutic opportunities:

Small Molecule Approaches

Stress granule modulators: Compounds that normalize stress granule dynamics
RNA metabolism enhancers: Drugs that improve RNA processing
Protein homeostasis modulators: Interventions that enhance [autophagy](/entities/autophagy) and proteostasis

Gene Therapy

Antisense oligonucleotides: Targeting mutant TIA1 transcripts
CRISPR editing: Correcting pathogenic mutations
Gene replacement: For loss-of-function variants

Drug Repurposing

Sodium valproate: Has been shown to modulate stress granule formation
Methylene blue: Affects stress granule dynamics
Rapamycin: Modulates autophagy and stress responses

External Links

[NCBI Gene*: [TIA1](https://www.ncbi.nlm.nih.gov/gene/4678)](/institutions/nih)
[Ensembl*: [TIA1](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000173166)](/genes/ar)
[UniProt*: [P52912](https://www.uniprot.org/uniprotkb/P52912)](/entities/htt)
[OMIM*: [603518](https://www.omim.org/entry/603518)](/entities/htt)
[GeneCards*: [TIA1](https://www.genecards.org/cgi-bin/carddisp.pl?gene=TIA1)](/genes/ar)

Brain Atlas Resources

[Allen Brain Atlas](https://brain-map.org)
[Allen Human Brain Atlas: TIA1 search](https://human.brain-map.org/microarray/search/show?search_term=TIA1)
[Allen Mouse Brain Atlas: TIA1 search](https://mouse.brain-map.org/search/index.html?query=TIA1)
[Allen Cell Type Atlas](https://portal.brain-map.org/atlases-and-data/rnaseq)
[BrainSpan Developmental Transcriptome](https://www.brainspan.org)

Background

The study of Tia1 Tia1 Cytotoxic Granule Associated Rna Binding 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.

References

[Kawakami A, Tian Q, Bui K, et al, "The RNA-binding protein TIA-1 is a novel splicing regulator." RNA (2000)](https://doi.org/10.1017/S1355838200000891)

[Kedersha NL, Gupta M, Li W, et al, "RNA-binding proteins TIA-1 and TIAR link the phosphorylation of eIF-2 alpha to the assembly of mammalian stress granules." Journal of Cell Biology (1999)](https://doi.org/10.1083/jcb.147.7.1431)

[Mackenzie IR, Nicholson AM, Sarkar M, et al, "TIA1 mutations in amyotrophic lateral sclerosis and Frontotemporal Dementia promote stress granule formation and modulate RNA metabolism." Acta Neuropathologica (2017)](https://doi.org/10.1007/s00401-017-1686-8)

[Anderson P, Kedersha N, "Stress granules: The Tao of RNA triage." Trends in Biochemical Sciences (2008)](https://doi.org/10.1016/j.tibs.2007.11.005)

[Baloh RH, "TIA1 mutations in ALS and FTD: A tale of two RNA-binding proteins." Acta Neuropathologica (2017)](https://doi.org/10.1007/s00401-017-1707-8)

[Klar J, Sobol M, Melberg A, et al, "Welander distal myopathy caused by an autosomal recessive mutation in TIA1." Neurology (2013)](https://doi.org/10.1212/WNL.0b013e3182a6cbf1)

Pathway Context

Mermaid diagram (expand to render)

Pathway Diagram

The following diagram shows the key molecular relationships involving TIA1 - TIA1 Cytotoxic Granule Associated RNA Binding Protein discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

Expression Profile

Sources: [GTEx Portal v10](https://gtexportal.org/home/gene/tia1) | [Allen Brain Atlas](https://www.brain-map.org/)

GTEx Tissue Expression (median TPM)

| Rank | Tissue | Median TPM |
|------|--------|------------|
| 1 | Ovary | 112.72 |
| 2 | Cervix Endocervix | 105.17 |
| 3 | Uterus | 102.60 |
| 4 | Cervix Ectocervix | 100.31 |
| 5 | Fallopian Tube | 98.48 |
| 6 | Brain Cerebellar Hemisphere | 84.55 |
| 7 | Brain Cerebellum | 78.99 |
| 8 | Thyroid | 78.94 |
| 9 | Pituitary | 72.50 |
| 10 | Spleen | 70.32 |
| 11 | Nerve Tibial | 67.26 |
| 12 | Prostate | 65.62 |
| 13 | Vagina | 58.50 |
| 14 | Colon Sigmoid | 58.04 |
| 15 | Small Intestine Terminal Ileum | 56.27 |

Brain-Region Expression:

| Region | Median TPM |
|--------|------------|
| Brain Cerebellar Hemisphere | 84.55 |
| Brain Cerebellum | 78.99 |

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TIA1 - TIA1 Cytotoxic Granule Associated RNA Binding Protein

TIA1 - TIA1 Cytotoxic Granule Associated RNA Binding Protein

TIA1 (TIA1 Cytotoxic Granule Associated RNA Binding Protein)

Introduction

Overview

TIA1 - TIA1 Cytotoxic Granule Associated RNA Binding Protein

TIA1 (TIA1 Cytotoxic Granule Associated RNA Binding Protein)

Introduction

Overview

Function

RNA Binding and Translational Regulation

Stress Granule Formation

Role in Neuronal Function

Disease Associations

Amyotrophic Lateral Sclerosis (ALS)

Frontotemporal Dementia (FTD)

Welander Distal Myopathy

Therapeutic Implications

Small Molecule Approaches

Gene Therapy

Drug Repurposing

See Also

External Links

Brain Atlas Resources

Background

References

Pathway Context

Pathway Diagram

Expression Profile

GTEx Tissue Expression (median TPM)