NCOA1 Gene

NCOA1 Gene

Gene Overview

NCOA1 Gene

Gene Overview

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">NCOA1 Gene</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td>NCOA1</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Nuclear Receptor Coactivator 1</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>2p23.3</td>
</tr>
<tr>
<td class="label">NCBI Gene</td>
<td>[8644](https://www.ncbi.nlm.nih.gov/gene/8644)</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>[602071](https://www.omim.org/entry/602071)</td>
</tr>
<tr>
<td class="label">Ensembl</td>
<td>[ENSG00000084676](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000084676)</td>
</tr>
<tr>
<td class="label">UniProt</td>
<td>[Q15788](https://www.uniprot.org/uniprot/Q15788)</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>1459 amino acids</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~164 kDa</td>
</tr>
<tr>
<td class="label">Nuclear Receptor</td>
<td>NCOA1 Role</td>
</tr>
<tr>
<td class="label">PPARgamma</td>
<td>Coactivation</td>
</tr>
<tr>
<td class="label">ERalpha/beta</td>
<td>Coactivation</td>
</tr>
<tr>
<td class="label">GR</td>
<td>Coactivation</td>
</tr>
<tr>
<td class="label">TR</td>
<td>Coactivation</td>
</tr>
<tr>
<td class="label">RAR</td>
<td>Coactivation</td>
</tr>
<tr>
<td class="label">LXR</td>
<td>Coactivation</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/cancer" style="color:#ef9a9a">Cancer</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">10 edges</a></td>
</tr>
</table>

{{.infobox .infobox-gene}}

Introduction

NCOA1 (Nuclear Receptor Coactivator 1), also known as SRC-1 (Steroid Receptor Coactivator-1), is a member of the p160 family of nuclear receptor coactivators[@ncoa2000]. It plays a critical role in modulating gene expression by enhancing the transcriptional activity of nuclear receptors and other transcription factors. NCOA1 is widely expressed in the brain and has been implicated in various neurological processes including neuroprotection, synaptic plasticity, and neurodegenerative disease pathogenesis[@nuclear2012].

Molecular Function

Structure

NCOA1 contains several functional domains:

• N-terminal basic helix-loop-helix (bHLH) domain: DNA binding and dimerization
• PAS domains (PAS-A, PAS-B): Protein-protein interactions and sensing environmental signals
• C-terminal activation domains (AD1, AD2): Interaction with chromatin remodeling complexes and basal transcription machinery[@structural2002]

Mechanism of Action

NCOA1 functions as a molecular bridge:

Role in the Brain

Neurodevelopment

During brain development, NCOA1 regulates:

• Neuronal differentiation and migration
• Astrocyte and oligodendrocyte development
• Synapse formation and maturation
• Axonal guidance and myelination[@ncoa2011]

Adult Brain Function

In the mature brain, NCOA1 modulates:

• Synaptic plasticity and memory formation
• Neurotransmitter receptor expression
• Metabolic gene regulation in [neurons](/entities/neurons)
• Response to neuronal injury[@ncoa2015]

Neurodegenerative Disease Implications

Alzheimer's Disease

NCOA1 has been implicated in Alzheimer's disease through several mechanisms:

• Amyloid metabolism: Regulates genes involved in [amyloid precursor protein](/entities/app-protein) (APP) processing
• Tau pathology: Modulates tau phosphorylation through nuclear receptor signaling
• Neuroinflammation: Controls inflammatory gene expression in [microglia](/cell-types/microglia-neuroinflammation)
• Metabolic dysfunction: Influences glucose metabolism and mitochondrial function[@ncoa2018]

• Altered NCOA1 expression in AD brains
• Interaction with AD risk genes ([APOE](/proteins/apoe), BIN1)
• Potential as a therapeutic target[@nuclear2020]

Parkinson's Disease

In Parkinson's disease, NCOA1 may play roles in:

• Dopaminergic neuron survival: Regulates anti-apoptotic pathways
• Mitochondrial function: Controls PGC-1alpha and mitochondrial biogenesis genes
• [Alpha-synuclein](/proteins/alpha-synuclein) toxicity: Modulates pathways affecting protein aggregation
• Neuroinflammation: Regulates microglial activation states[@ncoa2019]

Amyotrophic Lateral Sclerosis (ALS)

NCOA1 dysregulation has been observed in ALS:

• Altered expression in motor neurons
• Interaction with SOD1 and FUS/TLS pathology
• Potential involvement in excitotoxicity mechanisms[@ncoa2021]

Nuclear Receptor Interactions

NCOA1 interacts with multiple nuclear receptors relevant to neurodegeneration:

Therapeutic Implications

Nuclear Receptor-Targeted Therapies

NCOA1 serves as a coactivator for several drug targets:

• PPARγ agonists (thiazolidinediones): Investigated for AD/PD
• Estrogen receptor modulators: Neuroprotective strategies
• Liver X receptor (LXR) agonists: Cholesterol metabolism modulation[@targeting2017]

Direct NCOA1 Modulation

Approaches being explored:

• Coactivator mimetics: Peptides that mimic NCOA1 interaction domains
• Inhibitory compounds: Block excessive coactivator recruitment
• Gene therapy: Modulate NCOA1 expression levels[@ncoa2022]

Genetics and Variants

Polymorphisms

NCOA1 genetic variants have been studied in:

• Alzheimer's disease risk
• Parkinson's disease susceptibility
• Response to nuclear receptor-targeted therapies
• Metabolic syndrome associations[@ncoa2016]

Expression Studies

• NCOA1 mRNA is reduced in AD [hippocampus](/brain-regions/hippocampus)
• Protein levels altered in PD substantia nigra
• Post-translational modifications (phosphorylation, acetylation) affect function

Expression Pattern

Brain Regions

High expression in:

• Cerebral [cortex](/brain-regions/cortex) (pyramidal neurons)
• Hippocampus (CA1-CA3, dentate gyrus)
• Basal ganglia (striatum, substantia nigra)
• Cerebellum (Purkinje cells)
• Hypothalamus[@ncoa2013]

Cell Types

• Neurons: Principal expression in excitatory and inhibitory neurons
• [Astrocytes](/entities/astrocytes): Moderate expression
• Microglia: Low expression, increases with activation
• Oligodendrocytes: Present in mature oligodendrocytes

Interactions with Neurodegeneration Genes

NCOA1 interacts with or regulates several neurodegeneration-related genes:

• APP: Regulation of amyloid processing genes
• [MAPT](/proteins/tau): Modulates tau kinase/phosphatase pathways
• SNCA: Influences alpha-synuclein expression
• BDNF: Controls neurotrophic factor expression
• PGC-1α (PPARGC1A): Mitochondrial biogenesis regulation[@ncoa2020]

Research Tools

Model Systems

• Ncoa1 knockout mice: Developmental and behavioral phenotypes
• Cell lines: Neuronal (SH-SY5Y, PC12), glial (BV-2)
• iPSC-derived neurons: Patient-specific models

Inhibitors and Activators

• Cited1: Competitive binding inhibitor
• Garcinol: Histone acetyltransferase inhibitor
• CPTC: Coactivator peptide

See Also

• Nuclear receptors
• [Transcription factors](/mechanisms/transcription-factor-regulation)
• PPAR gamma
• Estrogen receptors
• SRC-1
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's disease](/diseases/parkinsons-disease)

External Links

• [NCBI Gene: NCOA1](https://www.ncbi.nlm.nih.gov/gene/8644)
• [UniProt: Q15788](https://www.uniprot.org/uniprot/Q15788)
• [Ensembl: ENSG00000084676](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000084676)
• [OMIM: 602071](https://www.omim.org/entry/602071)

References

Pathway Diagram

The following diagram shows the key molecular relationships involving NCOA1 Gene discovered through SciDEX knowledge graph analysis: