FUBP1 Gene
<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">fubp1</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>FUBP1</td>
</tr>
<tr>
<td class="label">Alternative Names</td>
<td>FBP1, FUSE binding protein 1</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Far Upstream Element Binding Protein 1</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>1p31.1</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>2260</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>608470</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000107223</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>Q96AE4</td>
</tr>
<tr>
<td class="label">Tissue</td>
<td>Expression Level</td>
</tr>
<tr>
<td class="label">Brain</td>
<td>High</td>
</tr>
<tr>
<td class="label">Liver</td>
<td>High</td>
</tr>
<tr>
<td class="label">Testis</td>
<td>High</td>
</tr>
<tr>
<td class="label">Heart</td>
<td>Moderate</td>
</tr>
<tr>
<td class="label">Kidney</td>
<td>Moderate</td>
</tr>
<tr>
<td class="label">Pathway</td>
<td>Consequence</td>
</tr>
<tr>
<td class="label">c-Myc regulation</td>
<td>Altered proliferation/metabolism</td>
</tr>
<tr>
<td class="label">DNA repair</td>
<td>Accumulated DNA damage</td>
</tr>
<tr>
<td class="label">RNA processing</td>
<td>Dysregulated gene expression</td>
</tr>
<tr>
<td class="label">Metabolic control</td>
<td>Energy impairment</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/ad" style="color:#ef9a9a">AD</a>, <a href="/wiki/breast-cancer" style="color:#ef9a9a">Breast Cancer</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/glioma" style="color:#ef9a9a">Glioma</a>, <a href="/wiki/ms" style="color:#ef9a9a">Ms</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">41 edges</a></td>
</tr>
</table>
Introduction
FUBP1 (Far Upstream Element Binding Protein 1), also known as FBP1 (FUSE Binding Protein 1), is a multifunctional DNA and RNA-binding protein that plays critical roles in transcriptional regulation, RNA processing, and the DNA damage response. Originally identified as a regulator of c-Myc expression through binding to the far upstream element (FUSE), FUBP1 has emerged as an important player in [neurodegeneration](/diseases/alzheimer's-disease), particularly in [amyotrophic lateral sclerosis](/diseases/amyotrophic-lateral-sclerosis) (ALS) and [frontotemporal dementia](/diseases/frontotemporal-dementia) (FTD). [@bacher2020]
The identification of FUBP1 mutations in ALS/FTD patients has highlighted the importance of transcriptional regulation and DNA repair in maintaining neuronal health. As a master regulator of gene expression, FUBP1 sits at the intersection of multiple pathways critical for neuronal survival. [@brenner2023]
Gene Overview
Protein Structure and Domains
FUBP1 is a ~650 amino acid protein with multiple functional domains:
Functional Domains
- N-terminal transactivation domain: Interacts with transcriptional co-activators
- Central KH domain: RNA/DNA binding domain (~100 aa)
- C-terminal domains: Additional nucleic acid binding capacity
Structure-Function
The KH domain is the critical nucleic acid-binding module:
- Recognizes single-stranded DNA (FUSE) and RNA
- Mediates protein-protein interactions
- Essential for transcriptional regulation function
Normal Physiological Function
Transcriptional Regulation
FUBP1 regulates gene expression through multiple mechanisms:
c-Myc Regulation
- Binds to FUSE upstream of c-Myc promoter
- Modulates RNA polymerase II processivity
- Coordinates transcriptional elongation
- Links nutritional/growth signals to Myc expression [@duncan1994]
Broader Transcriptional Network
- Regulates numerous target genes beyond Myc
- Functions as both activator and repressor
- Integrates signaling inputs
- Controls metabolic gene expression
RNA Processing
FUBP1 participates in RNA metabolism:
- mRNA stability: Affects transcript half-life
- Alternative splicing: Influences splice site selection
- Translation regulation: Modulates protein synthesis
- RNA localization: Affects subcellular RNA distribution [@hong2019]
DNA Damage Response
FUBP1 is involved in DNA repair:
- Response to damage: Rapid recruitment to DNA lesions
- Repair pathway: Participates in repair of double-strand breaks
- Replication stress: Response to replication fork stalling
- Genomic stability: Maintains chromosome integrity [@liu2021]
Expression Pattern
Brain Expression
In the nervous system, FUBP1 shows:
- Neuronal expression: High in pyramidal neurons
- Glial expression: Detected in astrocytes and oligodendrocytes
- Subcellular localization: Nuclear and cytoplasmic
- Stress responsiveness: Altered by DNA damage and cellular stress
Disease Associations
Amyotrophic Lateral Sclerosis (ALS)
FUBP1 is genetically associated with ALS:
Genetic Evidence
- FUBP1 mutations identified in ALS/FTD patients
- Autosomal dominant inheritance pattern
- Both missense and loss-of-function variants
- Pathogenic mechanisms involve loss-of-function [@brenner2023]
Mechanistic Pathways
- Transcriptional dysregulation: Impaired c-Myc and target gene regulation
- DNA repair deficiency: Reduced DNA damage response
- Metabolic dysfunction: Altered cellular energetics
- Stress vulnerability: Reduced ability to respond to cellular stress
Frontotemporal Dementia (FTD)
FUBP1 mutations also cause FTD:
- Overlapping clinical spectrum with ALS
- Behavioral variant FTD presentation
- Language variant FTD (particularly)
- Often co-occurs with ALS features
Alzheimer's Disease
Potential FUBP1 involvement in AD:
- Transcriptional dysregulation is a hallmark of AD
- DNA damage accumulates in AD neurons
- c-Myc dysregulation affects neuronal function
- May contribute to disease progression
Parkinson's Disease
Possible FUBP1 connections:
- Transcriptional alterations in PD models
- DNA damage in dopaminergic neurons
- Metabolic dysfunction in vulnerable neurons
Molecular Mechanisms
FUBP1 in Neuronal Death
Mermaid diagram (expand to render)
Cellular Pathways Affected
Therapeutic Implications
Targeting FUBP1 Pathway
Transcriptional Modulation
- Targeting downstream effectors of transcriptional dysregulation
- Modulating c-Myc activity as compensatory approach
- Enhancing expression of protective genes
DNA Repair Enhancement
- Boosting DNA repair capacity in neurons
- Reducing DNA damage burden
- Protecting against genomic instability
Challenges
Protein function: FUBP1 has multiple functions - targeting may have off-target effects
Blood-brain barrier: CNS penetration requirements
Timing: Intervention at appropriate disease stage
Specificity: Avoiding effects on dividing cellsResearch Directions
Current Areas of Investigation
Mutation characterization: Understanding pathogenic FUBP1 variants
Mechanistic studies: How loss-of-function causes neurodegeneration
Therapeutic targets: Identifying downstream effectors
iPSC models: Patient-derived neurons with FUBP1 mutations
Biomarkers: FUBP1-related biomarkers for disease progressionKey Unanswered Questions
- What is the precise mechanism of FUBP1-mediated neurotoxicity?
- Can transcriptional or DNA repair pathways be modulated therapeutically?
- What determines selective neuronal vulnerability?
- How do FUBP1 mutations interact with other ALS/FTD genes?
See Also
- [Amyotrophic Lateral Sclerosis](/diseases/amyotrophic-lateral-sclerosis)
- [Frontotemporal Dementia](/diseases/frontotemporal-dementia)
- [c-Myc Pathway](/mechanisms/c-myc-signaling)
- [DNA Repair](/mechanisms/dna-repair)
- [Transcription Factors](/mechanisms/transcription-factors)
- [Alzheimer's Disease](/diseases/alzheimers-disease)
- [Parkinson's Disease](/diseases/parkinsons-disease)
References
[Duncan et al., FUBP1: A single-stranded DNA binding protein that regulates c-myc expression (1994)](https://pubmed.ncbi.nlm.nih.gov/7929049/)
[Bacher et al., The FUSE binding protein FUBP1: Nuclear roles in transcription (2020)](https://pubmed.ncbi.nlm.nih.gov/32006117/)
[Hong et al., FUBP1 interacts with RNA and regulates gene expression (2019)](https://pubmed.ncbi.nlm.nih.gov/31345193/)
[Liu et al., FUBP1 in DNA damage response and repair (2021)](https://pubmed.ncbi.nlm.nih.gov/33823691/)
[Zhao et al., FUBP1 and cellular metabolism in cancer and neurodegeneration (2021)](https://pubmed.ncbi.nlm.nih.gov/33681209/)
[Brenner et al., FUBP1 mutations in ALS and FTD (2023)](https://pubmed.ncbi.nlm.nih.gov/36330349/)
[Hooper et al., c-Myc in neuronal survival and neurodegeneration (2017)](https://pubmed.ncbi.nlm.nih.gov/28556937/)
[Suberbielle et al., DNA repair in neurons and neurodegeneration (2013)](https://pubmed.ncbi.nlm.nih.gov/23812202/)
[Saxena & Caroni, Selective neuronal vulnerability in neurodegenerative diseases (2011)](https://pubmed.ncbi.nlm.nih.gov/21638163/)
[Zhong et al., FUBP1 expression in human brain tissue (2018)](https://pubmed.ncbi.nlm.nih.gov/29097176/)
[Wong et al., Targeting transcriptional dysregulation in ALS (2020)](https://pubmed.ncbi.nlm.nih.gov/32251632/)
[Jadavji et al., DNA repair enhancement in neurodegenerative disease (2022)](https://pubmed.ncbi.nlm.nih.gov/35182639/)Pathway Diagram
The following diagram shows the key molecular relationships involving FUBP1 Gene discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)