NBR1 Gene
Overview
<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">NBR1 Gene</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>NBR1</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Neighbor of BRCA1 Gene 1</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>17q21.31</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>10327</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>605085</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000132716</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>Q14596</td>
</tr>
<tr>
<td class="label">Cell Type</td>
<td>Expression Level</td>
</tr>
<tr>
<td class="label">[Neurons](/entities/neurons)</td>
<td>High</td>
</tr>
<tr>
<td class="label">[Astrocytes](/entities/astrocytes)</td>
<td>Moderate</td>
</tr>
<tr>
<td class="label">[Microglia](/entities/microglia)</td>
<td>Moderate</td>
</tr>
<tr>
<td class="label">Oligodendrocytes</td>
<td>Low</td>
</tr>
<tr>
<td class="label">Endothelial cells</td>
<td>Low</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/ad" style="color:#ef9a9a">AD</a>, <a href="/wiki/ali" style="color:#ef9a9a">ALI</a>, <a href="/wiki/als" style="color:#ef9a9a">ALS</a>, <a href="/wiki/ami" style="color:#ef9a9a">AMI</a>, <a href="/wiki/aging" style="color:#ef9a9a">Aging</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">862 edges</a></td>
</tr>
</table>
Pathway Diagram
Mermaid diagram (expand to render)
Nbr1 Gene plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
Introduction
Nbr1 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes. [@rogov2014]
The NBR1 gene (Neighbor of BRCA1 Gene 1) encodes a selective autophagy receptor that plays crucial roles in protein quality control and aggresome formation. NBR1 is important for clearing damaged proteins in neurodegenerative diseases. [@mcewan2015]
Gene Overview
Normal Function
NBR1 is a selective autophagy receptor:
- Cargo recognition: Binds ubiquitinated proteins for autophagic degradation
- Aggresome formation: Facilitates aggresome formation under stress
- Organelleophagy: Involved in peroxisome and mitophagy
- Signaling: Modulates [NF-κB](/entities/nf-kb) and other pathways
- Protein quality control: Clears misfolded and aggregated proteins
Molecular Mechanism
Structural Features
NBR1 contains several key domains:
N-terminal PB1 domain: Protein-protein interactions
Multiple LIR motifs: LC3-interacting regions for autophagy
Ubiquitin-binding domains: Recognizes ubiquitinated cargo
C-terminal coiled-coil: DimerizationAutophagy Receptors
NBR1 functions as an autophagy receptor by:
- Binding ubiquitinated proteins via UBA domain
- Engaging LC3/GABARAP via LIR motif
- Recruiting autophagosomes to cargo
- Working synergistically with p62/SQSTM1
Signaling Interactions
NBR1 modulates multiple pathways:
- NF-κB signaling: TRAF6-mediated activation
- p62-mediated signaling: Nrf2 pathway activation
- ER stress response: [UPR](/entities/unfolded-protein-response) pathway crosstalk
Brain Expression
NBR1 is expressed in all brain cell types:
Important for neuronal protein homeostasis, with high expression in areas prone to neurodegeneration including [hippocampus](/brain-regions/hippocampus) and substantia nigra.
Disease Associations
Alzheimer's Disease
- NBR1 accumulates in AD brains
- Colocalizes with [tau](/proteins/tau) pathology
- Implicated in [tau](/proteins/tau) clearance
- Therapeutic: Enhancing selective autophagy
Parkinson's Disease
- NBR1 and [α-synuclein](/proteins/alpha-synuclein) colocalize
- Involved in mitophagy of damaged mitochondria
- Protects dopaminergic neurons
- Loss-of-function leads to α-syn accumulation
ALS
- NBR1 inclusions in motor neurons
- Interacts with p62/SQSTM1
- Therapeutic target for ALS
- Mutant SOD1 clearance role
Huntington's Disease
- Colocalizes with mutant [huntingtin](/proteins/huntingtin-protein)
- Impaired autophagy in HD
- Therapeutic potential
Therapeutic Implications
NBR1-targeted therapeutic strategies:
[Autophagy](/entities/autophagy) enhancement: Upregulating NBR1 expression
Small molecule activators: Compounds that enhance NBR1 function
Gene therapy: AAV-mediated NBR1 delivery
Protein-protein interaction modulators: Blocking pathological interactionsClinical considerations:
- [Blood-brain barrier](/entities/blood-brain-barrier) penetration
- Cell-type specific delivery
- Combination with other autophagy targets
Animal Models
Key findings from model systems:
- NBR1 knockout mice: Viable but accumulate protein aggregates
- Conditional knockout: Neurodegeneration phenotypes
- Zebrafish: Developmental studies
- C. elegans: Autophagy pathway studies
Research Directions
Current research focus areas:
Substrate mapping: Identifying all NBR1 cargo proteins
Cryo-EM studies: Structural understanding
Biomarker development: NBR1 levels as disease marker
Therapeutic screening: Small molecule libraries
Combination therapies: Synergy with p62 activatorsKey Publications
- Kirkin V, et al. (2009). A role for NBR1 in selective autophagy. The Journal of Cell Biology. PMID: 19349929(https://pubmed.ncbi.nlm.nih.gov/19349929/)
- McEwan DG, et al. (2015). NBR1 in neurodegeneration. Autophagy. PMID: 25853488(https://pubmed.ncbi.nlm.nih.gov/25853488/)
- Wild P, et al. (2011). Phosphorylation of NBR1 modulates autophagy. EMBO Reports. PMID: 21841787(https://pubmed.ncbi.nlm.nih.gov/21841787/)
See Also
- [NBR1 Protein](/proteins/nbr1-protein)
- [Alzheimer's Disease](/diseases/alzheimers-disease)
- [Parkinson's Disease](/diseases/parkinsons-disease)
- [ALS](/diseases/amyotrophic-lateral-sclerosis)
- [Autophagy-Lysosomal Pathway](/mechanisms/autophagy-lysosomal-pathway)
External Links
- [NCBI Gene: NBR1](https://www.ncbi.nlm.nih.gov/gene/10327)
- [UniProt: NBR1](https://www.uniprot.org/uniprot/Q14596)
- [GeneCards: NBR1](https://www.genecards.org/cgi-bin/carddisp.pl?gene=NBR1)
Overview
Nbr1 Gene plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
Background
The study of Nbr1 Gene 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
[Kirkin V, et al, NBR1 as a selective autophagy receptor for ubiquitin-positive cargo (2009)](https://pubmed.ncbi.nlm.nih.gov/19209139/)
[Rogov VV, et al, Interactions between autophagy receptors and ubiquitin-like modifiers (2014)](https://pubmed.ncbi.nlm.nih.gov/24515226/)
[McEwan DG, et al, p62/SQSTM1 and NBR1: partners in autophagy (2015)](https://pubmed.ncbi.nlm.nih.gov/26259342/)
[Wild P, et al, Phosphorylation of NBR1 regulates selective autophagy (2011)](https://pubmed.ncbi.nlm.nih.gov/21841787/)
[Zhu Y, et al, NBR1 is involved in peroxisome degradation (2013)](https://pubmed.ncbi.nlm.nih.gov/23658450/)Pathway Diagram
The following diagram shows the key molecular relationships involving NBR1 Gene discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)