ATG14 Gene

ATG14 Gene

<div class="infobox infobox-gene">
<table>
<tr><th colspan="2" style="background:#4a90d9; color:white;">ATG14 (Autophagy Related 14)</th></tr>
<tr><td><strong>Full Name</strong></td><td>Autophagy Related 14</td></tr>
<tr><td><strong>Chromosomal Location</strong></td><td>10q26.3</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>22889</td></tr>
<tr><td><strong>OMIM ID</strong></td><td>614113</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000131725</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>Q9Y5P8</td></tr>
<tr><td><strong>Protein</strong></td><td>ATG14 (Barkor)</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Alzheimer's Disease, Parkinson's Disease, Cancer</td></tr>
</table>
</div>

Pathway Diagram

ATG14 Gene

<div class="infobox infobox-gene">
<table>
<tr><th colspan="2" style="background:#4a90d9; color:white;">ATG14 (Autophagy Related 14)</th></tr>
<tr><td><strong>Full Name</strong></td><td>Autophagy Related 14</td></tr>
<tr><td><strong>Chromosomal Location</strong></td><td>10q26.3</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>22889</td></tr>
<tr><td><strong>OMIM ID</strong></td><td>614113</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000131725</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>Q9Y5P8</td></tr>
<tr><td><strong>Protein</strong></td><td>ATG14 (Barkor)</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Alzheimer's Disease, Parkinson's Disease, Cancer</td></tr>
</table>
</div>

Pathway Diagram

Overview

The ATG14 gene (also known as Barkor) encodes a key autophagy protein that plays a critical role in the initiation of autophagy, a fundamental cellular process involved in protein quality control, organelle recycling, and cellular homeostasis[@itakura2008]. ATG14 is essential for the recruitment of the autophagosomal machinery to the site of autophagosome formation and has emerged as an important therapeutic target in neurodegenerative diseases, particularly [Alzheimer's disease](/diseases/alzheimers-disease) (AD) and [Parkinson's disease](/diseases/parkinsons-disease-disease) (PD)[@matsunaga2009].

Introduction

[Autophagy](/entities/autophagy) (macroautophagy) is a highly conserved cellular degradation pathway that involves the formation of double-membraned autophagosomes that engulf cytoplasmic components and deliver them to lysosomes for degradation. The ATG14 protein is a crucial component of the autophagy initiation machinery, specifically functioning as part of the PI3K (phosphoinositide 3-kinase) complex that generates phosphatidylinositol-3-phosphate (PI3P) at the site of autophagosome nucleation[@he2010].

The ATG14 protein was originally identified as an ATG14L (ATG14-like) protein and is conserved across eukaryotes. It contains an N-terminal CATERPILLER domain, a BATS domain (Barkor/ATG14L autophagosome targeting) that binds PI3P and membranes, and a C-terminal coiled-coil domain for protein-protein interactions.

Gene Structure

Genomic Organization

• Chromosome: 10q26.3
• Exons: 12 coding exons
• Transcript length: ~4.5 kb
• Protein length: 492 amino acids

Splice Variants

• Isoform 1: Full-length (492 aa)
• Isoform 2: Alternative splicing in 5' UTR

Protein Structure

Key Domains

• CATERPILLER domain: Protein-protein interactions
• BATS domain: PI3P binding and membrane association
• Coiled-coil domain: Dimerization and complex formation
• LC3-interacting region (LIR): Autophagosomal membrane binding

Post-Translational Modifications

• Phosphorylation: Multiple serine/threonine sites
• Ubiquitination: K63-linked chains for regulation

Molecular Function

Autophagy Initiation

PI3K Complex

• ATG14: Targeting subunit
• VPS34 (PIK3C3): Catalytic subunit
• VPS15 (PIK3R4): Regulatory subunit
• Beclin 1: Scaffold for complex formation

Selective Autophagy

• Cargo Recognition: Links specific cargo to autophagic machinery
• Receptor Function: Acts as autophagy receptor
• Organelle Quality Control: Mitochondrial and ER-phagy

Expression Pattern

Brain Expression

• High expression: Cerebral [cortex](/brain-regions/cortex), [hippocampus](/brain-regions/hippocampus)
• Neuronal localization: Pre-synaptic and post-synaptic
• Glial expression: [Astrocytes](/entities/astrocytes) and [microglia](/entities/microglia)

Tissue Distribution

• Ubiquitous expression with highest levels in brain
• Moderate expression in liver and kidney
• Low expression in heart and skeletal muscle

Disease Associations

Alzheimer's Disease

• Autophagy impairment: Early defect in AD brain
• [Amyloid-beta](/proteins/amyloid-beta) clearance: ATG14-mediated degradation
• [Tau](/proteins/tau) clearance: Autophagic pathway involvement
• Synaptic autophagy: Defects in AD synapses

Parkinson's Disease

• [α-Synuclein](/proteins/alpha-synuclein) clearance: Autophagy-lysosomal pathway
• Mitophagy: Mitochondrial quality control
• [LRRK2](/entities/lrrk2) interactions: Functional connections
• [GBA1](/entities/gba) associations: Lysosomal autophagy links

Cancer

• Tumor suppression: Autophagy as tumor suppressor
• Metabolism: Autophagy in cancer cell survival
• Therapeutic targeting: ATG14 as drug target

Other Conditions

• Metabolic disorders: Autophagy in diabetes
• Aging: Declining ATG14 function with age
• Infection: Autophagy in pathogen clearance

Therapeutic Targeting

Drug Development

• Autophagy enhancers: Upregulate ATG14 function
• [mTOR](/entities/mtor) inhibitors: Rapamycin, everolimus
• AMPK activators: Activate autophagy pathway
• Small molecule modulators: Direct ATG14 targeting

Gene Therapy

• Viral vectors: AAV-mediated ATG14 delivery
• CRISPR approaches: ATG14 gene editing
• RNAi: ATG14 knockdown studies

Biomarkers

• ATG14 expression: Disease progression marker
• Autophagic flux: Functional readouts
• CSF markers: Non-invasive monitoring

Animal Models

Knockout Studies

• Mice: Embryonic lethal in complete KO
• Conditional KO: [Neuron](/entities/neurons)-specific deletion
• Phenotypes: Neurodegeneration, accumulation

Transgenic Models

• Overexpression: Enhanced autophagy
• Mutant models: Disease-associated variants

See Also

• [Autophagy](/mechanisms/autophagy-lysosomal-pathway)
• [ATG Proteins](/entities/atg-proteins)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Protein Quality Control](/mechanisms/protein-quality-control-network)mechanisms/protein-quality-control-network)
• [Mitophagy](/mechanisms/mitophagy)

External Links

• [NCBI Gene - ATG14](https://www.ncbi.nlm.nih.gov/gene/22889)
• [UniProt - ATG14](https://www.uniprot.org/uniprot/Q9Y5P8)
• [OMIM - ATG14](https://www.omim.org/entry/614113)
• [Allen Brain Atlas - ATG14 Expression](https://human.brain-map.org)

Background

The study of Atg14 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

Pathway Diagram

The following diagram shows the key molecular relationships involving ATG14 Gene discovered through SciDEX knowledge graph analysis: