USF1 Protein

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USF1 Protein

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USF1 Protein

Introduction

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">USF1 Protein</th>
</tr>
<tr>
<td class="label">Protein Name</td>
<td>Upstream Stimulatory Factor 1</td>
</tr>
<tr>
<td class="label">Gene</td>
<td>USF1</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>P22415</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>310 amino acids</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~36 kDa</td>
</tr>
<tr>
<td class="label">Subcellular Localization</td>
<td>Nucleus</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>bHLH-LZ transcription factor</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>1q22</td>
</tr>
<tr>
<td class="label">Brain Region</td>
<td>Expression Level</td>
</tr>
<tr>
<td class="label">[Cortex](/brain-regions/cortex)</td>
<td>High</td>
</tr>
<tr>
<td class="label">[Hippocampus](/brain-regions/hippocampus)</td>
<td>High</td>
</tr>
<tr>
<td class="label">Cerebellum</td>
<td>Moderate</td>
</tr>
<tr>
<td class="label">Basal ganglia</td>
<td>Moderate</td>
</tr>
<tr>
<td class="label">Substantia nigra</td>
<td>Low-Moderate</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/ataxia" style="color:#ef9a9a">Ataxia</a>, <a href="/wiki/dystonia" style="color:#ef9a9a">Dystonia</a>, <a

...

USF1 Protein

Introduction

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">USF1 Protein</th>
</tr>
<tr>
<td class="label">Protein Name</td>
<td>Upstream Stimulatory Factor 1</td>
</tr>
<tr>
<td class="label">Gene</td>
<td>USF1</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>P22415</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>310 amino acids</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~36 kDa</td>
</tr>
<tr>
<td class="label">Subcellular Localization</td>
<td>Nucleus</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>bHLH-LZ transcription factor</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>1q22</td>
</tr>
<tr>
<td class="label">Brain Region</td>
<td>Expression Level</td>
</tr>
<tr>
<td class="label">[Cortex](/brain-regions/cortex)</td>
<td>High</td>
</tr>
<tr>
<td class="label">[Hippocampus](/brain-regions/hippocampus)</td>
<td>High</td>
</tr>
<tr>
<td class="label">Cerebellum</td>
<td>Moderate</td>
</tr>
<tr>
<td class="label">Basal ganglia</td>
<td>Moderate</td>
</tr>
<tr>
<td class="label">Substantia nigra</td>
<td>Low-Moderate</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/ataxia" style="color:#ef9a9a">Ataxia</a>, <a href="/wiki/dystonia" style="color:#ef9a9a">Dystonia</a>, <a href="/wiki/huntington" style="color:#ef9a9a">Huntington</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">20 edges</a></td>
</tr>
</table>

Usf1 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

USF1 (Upstream Stimulatory Factor 1) is a transcription factor belonging to the basic helix-loop-helix leucine zipper (bHLH-LZ) family. It plays crucial roles in regulating gene expression involved in lipid metabolism, glucose homeostasis, cell cycle progression, and stress responses. USF1 has been implicated in Alzheimer's disease, cardiovascular disease, and metabolic disorders[@viollet1996].

Protein Information

Protein Structure

USF1 contains several functional domains[@viollet1996]:

DNA-Binding Domains

Basic region: Binds to E-box DNA sequences (CANNTG)
Helix-loop-helix (HLH) domain: Mediates protein dimerization
Leucine zipper (LZ) motif: Stabilizes dimer formation

Transactivation Domain

N-terminal activation domain: Interacts with transcriptional coactivators
C-terminal regulatory region: Modulates DNA binding affinity

Biological Functions

Gene Regulation

USF1 regulates expression of genes involved in:

Lipid metabolism: Fatty acid synthesis, cholesterol homeostasis

Glucose metabolism: Gluconeogenesis, glycolysis, insulin signaling

Cell cycle: Cyclins, CDK inhibitors

Stress response: [Heat shock proteins](/entities/heat-shock-proteins), antioxidant genes

Circadian rhythm: Clock genes, metabolism genes

Dimer Formation

USF1 functions primarily as a heterodimer with USF2, but can also form homodimers:

USF1/USF2 heterodimer: Most common and biologically active form
USF1 homodimer: Alternative form with distinct target gene specificity

DNA Binding

Recognizes E-box sequences (5'-CANNTG-3')
Binds to promoter/enhancer regions of target genes
Competes with other bHLH transcription factors (Myc, Max, Clock)

Role in Neurodegenerative Diseases

Alzheimer's Disease

USF1 is implicated in Alzheimer's disease through multiple mechanisms[@liu2002]:

Amyloid metabolism: Regulates [APP](/entities/app-protein) processing and [Aβ](/proteins/amyloid-beta) production
Lipid homeostasis: Dysregulation affects neuronal lipid rafts and synaptic function
Cholesterol transport: Links to [APOE](/proteins/apoe) and lipid metabolism in AD
Neuroinflammation: Modulates inflammatory gene expression
Circadian disruption: Alters circadian clock genes in AD brain

Parkinson's Disease

Protein homeostasis: May affect [α-synuclein](/proteins/alpha-synuclein) expression
Mitochondrial function: Regulates genes involved in mitochondrial biogenesis
Oxidative stress: Controls antioxidant gene expression

Amyotrophic Lateral Sclerosis (ALS)

Stress response: Dysregulation of heat shock protein expression
Protein aggregation: May influence aggregation-prone protein clearance

Expression Pattern

Interaction Network

USF1 interacts with:

USF2: Heterodimer formation, cooperative DNA binding
CBP/p300: Transcriptional coactivators with histone acetyltransferase activity
HDAC1/2: Transcriptional repression
NRF2: Cooperates in antioxidant response
REST: Neural restrictive silencer factor
SIRT1: Deacetylase involved in metabolic regulation

Therapeutic Implications

USF1 is a potential therapeutic target for:

Metabolic disorders: Small molecules modulating USF1 activity

Neurodegeneration: Understanding its role in AD/PD pathogenesis

Cancer: Altered expression in various cancers

Key Publications

Viollet B, et al. (1996). "The transcription factor USF1 regulates gene expression." Journal of Biological Chemistry. PMID: 8621685(https://pubmed.ncbi.nlm.nih.gov/8621685/).

Liu L, et al. (2002). "USF1 and cholesterol metabolism in Alzheimer's disease." Journal of Alzheimer's Disease. PMID: 12214107(https://pubmed.ncbi.nlm.nih.gov/12214107/).

Caswell CC, et al. (2009). "The bHLH-LZ transcription factor USF1." Cellular and Molecular Life Sciences. PMID: 19151984(https://pubmed.ncbi.nlm.nih.gov/19151984/).

Background

The study of Usf1 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.

External Links

[PubMed](https://pubmed.ncbi.nlm.nih.gov/) - Biomedical literature
[Alzheimer's Disease Neuroimaging Initiative](https://adni.loni.usc.edu/) - Research data
[Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data

References

[Viollet B, et al, (1996) (1996)](https://pubmed.ncbi.nlm.nih.gov/8621685/)

[Liu L, et al, (2002) (2002)](https://pubmed.ncbi.nlm.nih.gov/12214107/)

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Related Entities

USF1PROTEIN

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📊 Evidence Profile Foundational

Evidence Balance

+0%

Certainty

50%

Debates

0

Incoming

10

Outgoing

25

0 supporting 0 contradicting 0 neutral

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📗 Cite This Artifact

USF1 Protein

USF1 Protein

Introduction

USF1 Protein

Introduction

Overview

Protein Information

Protein Structure

DNA-Binding Domains

Transactivation Domain

Biological Functions

Gene Regulation

Dimer Formation

DNA Binding

Role in Neurodegenerative Diseases

Alzheimer's Disease

Parkinson's Disease

Amyotrophic Lateral Sclerosis (ALS)

Expression Pattern

Interaction Network

Therapeutic Implications

Key Publications

See Also

Background

External Links

References

💬 Discussion