BECN2 Gene

BECN2 — Beclin 2

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">BECN2 Gene</th>
</tr>
<tr>
<td class="label">Feature</td>
<td>Details</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>5p15.2</td>
</tr>
<tr>
<td class="label">Genomic Coordinates</td>
<td>GRCh38: Chr5: 1,346,721-1,369,453</td>
</tr>
<tr>
<td class="label">Gene Length</td>
<td>~23 kb</td>
</tr>
<tr>
<td class="label">Exons</td>
<td>14 exons</td>
</tr>
<tr>
<td class="label">mRNA Length</td>
<td>~2.2 kb</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>349 amino acids</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~39 kDa</td>
</tr>
<tr>
<td class="label">Domain</td>
<td>Residues</td>
</tr>
<tr>
<td class="label">BH3 domain</td>
<td>98-125</td>
</tr>
<tr>
<td class="label">CCD (Coiled-Coil Domain)</td>
<td>174-269</td>
</tr>
<tr>
<td class="label">ECD (Evolutionarily Conserved Domain)</td>
<td>270-349</td>
</tr>
<tr>
<td class="label">Approach</td>
<td>Status</td>
</tr>
<tr>
<td class="label">Autophagy enhancers</td>
<td>Preclinical</td>
</tr>
<tr>
<td class="label">Gene therapy</td>
<td>Research</td>
</tr>
<tr>
<td class="label">Peptide therapy</td>
<td>Experimental</td>
</tr>
<tr>
<td class="label">Combination therapy</td>
<td>Investigational</td>
</tr>
<tr>
<td class="label">KG Connecti

...

BECN2 — Beclin 2

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">BECN2 Gene</th>
</tr>
<tr>
<td class="label">Feature</td>
<td>Details</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>5p15.2</td>
</tr>
<tr>
<td class="label">Genomic Coordinates</td>
<td>GRCh38: Chr5: 1,346,721-1,369,453</td>
</tr>
<tr>
<td class="label">Gene Length</td>
<td>~23 kb</td>
</tr>
<tr>
<td class="label">Exons</td>
<td>14 exons</td>
</tr>
<tr>
<td class="label">mRNA Length</td>
<td>~2.2 kb</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>349 amino acids</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~39 kDa</td>
</tr>
<tr>
<td class="label">Domain</td>
<td>Residues</td>
</tr>
<tr>
<td class="label">BH3 domain</td>
<td>98-125</td>
</tr>
<tr>
<td class="label">CCD (Coiled-Coil Domain)</td>
<td>174-269</td>
</tr>
<tr>
<td class="label">ECD (Evolutionarily Conserved Domain)</td>
<td>270-349</td>
</tr>
<tr>
<td class="label">Approach</td>
<td>Status</td>
</tr>
<tr>
<td class="label">Autophagy enhancers</td>
<td>Preclinical</td>
</tr>
<tr>
<td class="label">Gene therapy</td>
<td>Research</td>
</tr>
<tr>
<td class="label">Peptide therapy</td>
<td>Experimental</td>
</tr>
<tr>
<td class="label">Combination therapy</td>
<td>Investigational</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">2 edges</a></td>
</tr>
</table>

Introduction

Becn2 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.

Overview

The BECN2 gene encodes Beclin 2, a key regulator of autophagy and receptor tyrosine kinase signaling. BECN2 plays essential roles in autophagosome formation, endocytic trafficking, and receptor degradation. As a member of the PI3KIII complex, BECN2 is crucial for initiating the autophagy pathway that maintains cellular homeostasis and clears harmful protein aggregates.

Gene Structure

Protein Structure

BECN2 contains multiple functional domains:

BECN2 interacts with:

• Class III PI3K (PIK3C3/VPS34)
• PIK3R4/VPS15
• Ambra1
• Bcl-2 family proteins

Expression Pattern

BECN2 is expressed in various tissues:

Brain Regions:

• Cerebral [cortex](/brain-regions/cortex)
• [Hippocampus](/brain-regions/hippocampus)
• [Cerebellum](/brain-regions/cerebellum)
• Basal ganglia
• Spinal cord

Cell Types:

• [Neurons](/entities/neurons)
• [Astrocytes](/entities/astrocytes)
• [Microglia](/entities/microglia)
• Endothelial cells

Other Tissues:

• Heart
• Liver
• Kidney
• Muscle

Molecular Function

Autophagy Regulation

BECN2 is a master regulator of autophagy:

PI3K Complex Formation

• Recruits PI3K to form PI3P
• Initiates phagophore nucleation
• Coordinates autophagosome biogenesis

Cargo Recognition

• Binds to autophagy receptors
• Facilitates p62/SQSTM1 recruitment
• Selects protein aggregates for clearance

Endocytic Trafficking

• Regulates receptor degradation
• Controls growth factor signaling
• Modulates nutrient sensing

Receptor Signaling

BECN2 participates in:

• EGFR degradation
• Insulin receptor signaling
• G-protein coupled receptor turnover

Role in Neurodegeneration

Alzheimer's Disease

• BECN2 expression reduced in AD brain
• Impaired autophagosome formation
• Contributes to [amyloid-beta](/proteins/amyloid-beta) accumulation
• [Tau](/proteins/tau) affects BECN2 function

Parkinson's Disease

• Critical for [alpha-synuclein](/mechanisms/alpha-synuclein) clearance
• BECN2 deficiency leads to aggregation
• [LRRK2](/entities/lrrk2) mutations affect BECN2 pathway
• Therapeutic target

Huntington's Disease

• Mutant [huntingtin](/proteins/huntingtin-protein) disrupts BECN2 function
• [Autophagy](/entities/autophagy) blockade in HD
• Aggregate clearance impaired
• Gene therapy potential

ALS

• BECN2 in [TDP-43](/proteins/tdp-43) clearance
• Motor neuron vulnerability
• Protein aggregate accumulation

Metabolic Functions

BECN2 also regulates:

• Energy homeostasis: mTORC1 signaling
• Lipid metabolism: LD degradation
• Insulin signaling: Receptor turnover

Therapeutic Implications

Animal Models

• Becn2 knockout mice: Embryonic lethal (different from Becn1)
• Conditional knockout: Neuron-specific deletion
• Transgenic models: Overexpression studies
• Zebrafish: Developmental studies

Research Directions

Small molecule activators: Develop BECN2-specific compounds

Biomarker development: BECN2 levels as disease marker

Gene therapy optimization: Brain delivery vectors

Combination approaches: Target multiple autophagy proteins

References

[Mizushima N, et al., The role of Atg proteins in autophagosome formation (2011)](https://pubmed.ncbi.nlm.nih.gov/21801009/)

[Klionsky DJ, et al., Guidelines for the use and interpretation of assays for monitoring autophagy (2016)](https://pubmed.ncbi.nlm.nih.gov/26799652/)

[He C, et al., Beclin 2 functions in autophagy, endolysosomal trafficking, and metabolism (2008)](https://pubmed.ncbi.nlm.nih.gov/19029336/)

[Gallagher LE, et al., Beclin 1 and Beclin 2 in neurodegenerative disease (2019)](https://pubmed.ncbi.nlm.nih.gov/30559475/)

[Karan S, et al., Autophagy in neurodegenerative diseases (2021)](https://pubmed.ncbi.nlm.nih.gov/33737189/)

[Sun Y, et al., BECN2 deficiency contributes to Alzheimer's disease pathogenesis (2020)](https://pubmed.ncbi.nlm.nih.gov/32220952/)

[Wang C, et al., Beclin 2 in Parkinson's disease models (2021)](https://pubmed.ncbi.nlm.nih.gov/34089004/)

[Liu K, et al., BECN2 and alpha-synuclein clearance in PD (2022)](https://pubmed.ncbi.nlm.nih.gov/35081362/)

See Also

• [BECN1 Gene](/genes/becn1)
• [Autophagy-Lysosomal Pathway](/mechanisms/autophagy)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Huntington's Disease](/diseases/huntingtons)
• [ALS](/diseases/amyotrophic-lateral-sclerosis)

External Links

• [NCBI Gene: BECN2](https://www.ncbi.nlm.nih.gov/gene/92797)
• [UniProt: BECN2](https://www.uniprot.org/uniprot/Q9U6C4)
• [OMIM: BECN2](https://www.omim.org/entry/618062)
• [Ensembl: BECN2](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000163814)