TIA1 - TIA1 Cytotoxic Granule Associated RNA Binding Protein

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

<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 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:

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:

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:

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

See Also

• [Genes Index](/genes)
• [Proteins Index](/proteins)
• [ALS](/diseases/amyotrophic-lateral-sclerosis)
• [Stress Granules](/mechanisms/stress-granules)
• [RNA Metabolism](/mechanisms/rna-metabolism)
• [Frontotemporal Dementia](/diseases/frontotemporal-dementia)
• [Motor Neuron Disease](/diseases/motor-neuron-disease)

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

Pathway Context

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:

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 |