TRIM24 — Tripartite Motif Containing 24

TRIM24 — Tripartite Motif Containing 24

<div class="infobox infobox-gene">
<table>
<tr><td><strong>Gene Symbol</strong></td><td>TRIM24</td></tr>
<tr><td><strong>Full Name</strong></td><td>Tripartite Motif Containing 24</td></tr>
<tr><td><strong>Chromosome</strong></td><td>7q33</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>[8992](https://www.ncbi.nlm.nih.gov/gene/8992)</td></tr>
<tr><td><strong>OMIM</strong></td><td>603546</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000108344</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[Q9Y2X9](https://www.uniprot.org/uniprot/Q9Y2X9)</td></tr>
<tr><td><strong>Protein Size</strong></td><td>1,008 amino acids</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Various Cancers, Breast Cancer, Hepatocellular Carcinoma</td></tr>
</table>
</div>

Overview

TRIM24 — Tripartite Motif Containing 24

<div class="infobox infobox-gene">
<table>
<tr><td><strong>Gene Symbol</strong></td><td>TRIM24</td></tr>
<tr><td><strong>Full Name</strong></td><td>Tripartite Motif Containing 24</td></tr>
<tr><td><strong>Chromosome</strong></td><td>7q33</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>[8992](https://www.ncbi.nlm.nih.gov/gene/8992)</td></tr>
<tr><td><strong>OMIM</strong></td><td>603546</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000108344</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[Q9Y2X9](https://www.uniprot.org/uniprot/Q9Y2X9)</td></tr>
<tr><td><strong>Protein Size</strong></td><td>1,008 amino acids</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Various Cancers, Breast Cancer, Hepatocellular Carcinoma</td></tr>
</table>
</div>

Overview

TRIM24 (Tripartite Motif Containing 24), also known as TIF1alpha, is a transcriptional coactivator and E3 ubiquitin ligase that plays key roles in gene regulation, DNA damage response, and cellular stress responses [1](https://pubmed.ncbi.nlm.nih.gov/10925184/). TRIM24 regulates transcription by interacting with various nuclear receptors and chromatin modifiers, and is implicated in cancer development and progression.

Gene and Protein Structure

The TRIM24 gene spans approximately 25 kb on chromosome 7q33 and contains 17 exons encoding a protein of 1,008 amino acids [2](https://pubmed.ncbi.nlm.nih.gov/10644441/). The TRIM24 protein contains multiple functional domains:

• RING finger: A C3HC4 RING domain with E3 ubiquitin ligase activity
• B boxes: Two B-box domains involved in protein-protein interactions
• Coiled-coil region: Mediates homodimerization
• PHD finger: A plant homeodomain that binds histone marks
• Bromodomain: Recognizes acetyl-lysine residues on histones

Function

Transcriptional Regulation

TRIM24 functions as a coactivator for nuclear receptors including:

• Retinoic acid receptors (RARs)
• Thyroid hormone receptors (TRs)
• Estrogen receptors (ERs)
• Androgen receptors (ARs)

E3 Ubiquitin Ligase Activity

The RING domain confers E3 ubiquitin ligase activity, enabling TRIM24 to:

• Mono-ubiquitinate histone H2A
• Ubiquitinate transcription factors
• Target proteins for degradation

DNA Damage Response

TRIM24 is recruited to DNA damage sites and participates in:

• Chromatin remodeling at damage sites
• Regulation of p53 stability
• Cell cycle checkpoint control

Chromatin Recognition

The PHD and bromodomain fingers recognize:

• Unmodified histone H3 tail (PHD)
• Acetylated histone marks (bromodomain)

Expression Pattern

TRIM24 shows tissue-specific expression:

• High expression in brain, particularly in neurons
• Expression in various epithelial tissues
• Low expression in most normal adult tissues
• Overexpression in multiple cancer types

Disease Associations

Cancer

TRIM24 is frequently overexpressed in various cancers:

| Cancer Type | Role | Mechanism |
|-------------|------|-----------|
| Breast cancer | Oncogene | Promotes cell proliferation, inhibits apoptosis |
| Hepatocellular carcinoma | Oncogene | Activates Wnt/β-catenin pathway |
| Lung cancer | Prognostic marker | High expression correlates with poor survival |
| Glioma | Oncogene | Regulates stemness and invasion |

Neurodevelopmental Disorders

Rare TRIM24 variants have been associated with:

• Intellectual disability
• Developmental delay
• Autism spectrum disorders

Pathogenesis

Dysregulated Transcription

Overexpression of TRIM24 leads to:

• Aberrant activation of oncogenic genes
• Disruption of normal differentiation programs
• Resistance to cellular stress responses

Chromatin Dysregulation

Loss of proper histone modification reading leads to:

• Altered epigenetic landscape
• Dysregulated gene expression programs

Interaction with p53

TRIM24 negatively regulates p53:

• Promotes p53 degradation
• Inhibits p53 transcriptional activity
• Contributes to reduced tumor suppression

Therapeutic Approaches

Targeting TRIM24

• Small molecule inhibitors: Development of compounds that block TRIM24's transcriptional coactivator function
• E3 ligase modulators: Compounds that modulate TRIM24's ubiquitin ligase activity
• Protein degradation: PROTAC molecules that induce TRIM24 degradation

Cancer Therapy

TRIM24 expression levels serve as:

• Prognostic biomarker in some cancers
• Potential therapeutic target

Relationship to Neurodegeneration

TRIM24 research provides insights into neurodegeneration:

TRIM24 in Neurodegenerative Diseases

Alzheimer's Disease

TRIM24's chromatin regulatory functions may be relevant to AD pathogenesis:

• Epigenetic dysregulation: AD is associated with widespread epigenetic changes including histone modifications. TRIM24's PHD and bromodomain may read/write these modifications abnormally
• DNA damage accumulation: Neurons accumulate DNA damage with age. TRIM24's role in DNA damage response may be compromised in AD
• Transcription deficits: AD brains show reduced expression of synaptic proteins. TRIM24-mediated transcriptional regulation may contribute to these deficits [10](https://pubmed.ncbi.nlm.nih.gov/31192724/)

Parkinson's Disease

TRIM24 may contribute to PD through:

• p53 regulation: p53 dysfunction is implicated in dopaminergic neuron death. TRIM24's negative regulation of p53 may affect neuronal survival
• Oxidative stress response: TRIM24 participates in cellular stress responses relevant to PD
• Protein homeostasis: TRIM24's E3 ligase function may affect clearance of misfolded proteins [11](https://pubmed.ncbi.nlm.nih.gov/23625699/)

Amyotrophic Lateral Sclerosis

In ALS, TRIM24 may be involved through:

• Stress granules: TRIM24 localizes to stress granules, which are dysregulated in ALS
• RNA processing: Transcriptional regulation intersects with RNA metabolism defects in ALS

Clinical Genetics

Mutation Spectrum

TRIM24 variants in disease:

| Variant Type | Associated Conditions | Mechanism |
|--------------|---------------------|-----------|
| Missense | Intellectual disability | Loss of function |
| Frameshift | Cancer | Truncated protein |
| Splice site | Neurodevelopmental | Aberrant splicing |

Most pathogenic variants affect the RING domain or chromatin-reading domains.

Genetic Testing

• Indications: Family history of neurodevelopmental disorders, early-onset cancer
• Methods: Targeted panel or whole exome sequencing
• Interpretation: ACMG guidelines for variant classification

Animal Models

Mouse Models

TRIM24 knockout mice exhibit:

• Embryonic lethality
• Defects in neural tube closure
• Impaired retinoic acid signaling
• Infertility

• Learning and memory deficits
• Altered histone modification patterns
• Increased susceptibility to cancer

Zebrafish Models

Zebrafish studies reveal:

• Neural development defects
• Retinoic acid signaling disruption
• Craniofacial abnormalities

Therapeutic Approaches

Targeting TRIM24 in Disease

Small Molecule Inhibitors

Several approaches target TRIM24:

• Bromodomain inhibitors: Block acetyl-lysine recognition
• PHD domain blockers: Prevent histone binding
• RING domain inhibitors: Modulate E3 ligase activity

• PROTACs: Degrade TRIM24 using ubiquitin-proteasome system
• Molecular glues: Induce TRIM24 degradation

Cancer Therapy

TRIM24 as therapeutic target:

• Overexpression in multiple cancers makes it a candidate
• High expression correlates with poor prognosis
• Knockdown reduces proliferation in vitro [12](https://pubmed.ncbi.nlm.nih.gov/23644455/)

Neurodegeneration

TRIM24-based approaches for neurodegeneration:

• Enhancing TRIM24 function may support neuronal survival
• Modulating p53 regulation could protect neurons
• Epigenetic therapy may restore transcriptional programs [13](https://pubmed.ncbi.nlm.nih.gov/29753760/)

Research Directions

Ongoing Studies

Unanswered Questions

• How does TRIM24 coordinate transcriptional and epigenetic functions?
• What determines TRIM24's context-specific functions in different tissues?
• Can TRIM24 modulators provide benefits in neurodegeneration?

Conclusion

TRIM24 encodes a multifunctional protein with roles in transcription, chromatin regulation, and DNA damage response. Its domain architecture—combining chromatin-reading modules with enzymatic activity—makes it unique among transcriptional regulators. While primarily studied in cancer, TRIM24's functions in epigenetic regulation and DNA repair have direct relevance to neurodegenerative diseases. Understanding TRIM24 biology provides insights into broader mechanisms of transcriptional dysregulation, p53 regulation, and chromatin remodeling that underlie neurodegeneration.

Current Research and Future Directions

Novel Findings

Recent studies have uncovered additional TRIM24 functions:

• Metabolic regulation: TRIM24 influences metabolic gene expression, potentially linking nutrition to epigenetic state
• Stem cell biology: TRIM24 maintains pluripotency through transcriptional programs
• Immune function: TRIM24 regulates cytokine expression and immune cell differentiation

Therapeutic Implications

The dual role of TRIM24 in cancer and neurodegeneration presents opportunities:

• Cancer-selective targeting: Developing inhibitors that specifically affect cancer cells
• Neuroprotection: Enhancing beneficial TRIM24 functions in neurons
• Combination therapy: Targeting TRIM24 with other therapeutic modalities

Cross-Linked Mechanisms

• [Transcription Regulation](/mechanisms/transcription-regulation) — TRIM24 as coactivator
• [Ubiquitin-Proteasome System](/mechanisms/ubiquitin-proteasome-system) — E3 ligase activity
• [DNA Damage Response](/mechanisms/dna-damage-response) — DNA repair involvement
• [Chromatin Remodeling](/mechanisms/chromatin-remodeling) — Histone modification reading
• [Cancer](/diseases/cancer) — Overexpression in various cancers

Key References

External Resources

• [NCBI Gene: TRIM24](https://www.ncbi.nlm.nih.gov/gene/8992)
• [UniProt: Q9Y2X9](https://www.uniprot.org/uniprot/Q9Y2X9)
• [OMIM: 603546](https://omim.org/entry/603546)
• [COSMIC: TRIM24 in Cancer](https://cancer.sanger.ac.uk/cosmic/gene/analysis?ln=TRIM24)

Pathway Diagram

The following diagram shows the key molecular relationships involving TRIM24 — Tripartite Motif Containing 24 discovered through SciDEX knowledge graph analysis: