GAIN Gene - GABA-A Receptor Associated Protein Like 2

GAIN Gene

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">GAIN Gene - GABA-A Receptor Associated Protein Like 2</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td><strong>GAIN</strong></td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>GAIN - GABA-A Receptor Associated Protein Like 2</td>
</tr>
<tr>
<td class="label">Type</td>
<td>Gene</td>
</tr>
<tr>
<td class="label">NCBI</td>
<td><a href="https://www.ncbi.nlm.nih.gov/gene/?term=GAIN" target="_blank">Search NCBI</a></td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">ALS</a>, <a href="/wiki/alzheimer" style="color:#ef9a9a">ALZHEIMER</a>, <a href="/wiki/alzheimer-disease" style="color:#ef9a9a">ALZHEIMER DISEASE</a>, <a href="/wiki/alzheimer's-disease" style="color:#ef9a9a">ALZHEIMER'S DISEASE</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">1295 edges</a></td>
</tr>
</table>

Pathway Diagram

GAIN Gene

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">GAIN Gene - GABA-A Receptor Associated Protein Like 2</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td><strong>GAIN</strong></td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>GAIN - GABA-A Receptor Associated Protein Like 2</td>
</tr>
<tr>
<td class="label">Type</td>
<td>Gene</td>
</tr>
<tr>
<td class="label">NCBI</td>
<td><a href="https://www.ncbi.nlm.nih.gov/gene/?term=GAIN" target="_blank">Search NCBI</a></td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">ALS</a>, <a href="/wiki/alzheimer" style="color:#ef9a9a">ALZHEIMER</a>, <a href="/wiki/alzheimer-disease" style="color:#ef9a9a">ALZHEIMER DISEASE</a>, <a href="/wiki/alzheimer's-disease" style="color:#ef9a9a">ALZHEIMER'S DISEASE</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">1295 edges</a></td>
</tr>
</table>

Pathway Diagram

Full Name: GABA-A Receptor Associated Protein Like 2 Gene Symbol: GAIN (formerly GABARAPL2) Gene ID: 124454 Chromosomal Location: 16p13.3

Overview

The GAIN gene encodes a protein belonging to the GABA-A receptor-associated protein (GABARAP) family. This family of proteins is primarily involved in autophagy, intracellular membrane trafficking, and receptor signaling. GAIN has been implicated in [Parkinson's disease](/diseases/parkinsons-disease) (PD) through genome-wide association studies (GWAS), making it a gene of interest in neurodegenerative disease research.

Protein Function

Autophagy Regulation

GAIN (GABARAPL2) plays a critical role in the autophagy-lysosome pathway, a cellular process responsible for degrading and recycling damaged organelles, protein aggregates, and other cellular components. Autophagy is particularly important in [neurons](/entities/neurons) due to their post-mitotic nature and high metabolic demands.

• Autophagosome Formation: GAIN is involved in the nucleation and expansion of autophagosomes, the double-membraned vesicles that engulf cellular debris for degradation
• Cargo Recognition: The protein helps recognize and package specific cargo into autophagosomes
• Fusion with Lysosomes: GAIN facilitates the fusion of autophagosomes with lysosomes to form autolysosomes

GABA-A Receptor Trafficking

As suggested by its name, GAIN was initially identified as a protein interacting with GABA-A receptors:

• Receptor Trafficking: Facilitates the transport of GABA-A receptors to the cell membrane
• Receptor Clustering: Involved in clustering GABA-A receptors at synaptic sites
• Synaptic Inhibition: Supports proper GABAergic synaptic transmission

Parkinson's Disease Association

GWAS Findings

Multiple GWAS studies have identified single nucleotide polymorphisms (SNPs) in the GAIN genomic region as associated with Parkinson's disease risk:

• The GAIN locus on chromosome 16p13.3 represents a Parkinson's disease risk locus
• Risk alleles may affect gene expression or protein function
• The association suggests a role for autophagy dysfunction in PD pathogenesis

Mechanistic Link to PD

The connection between GAIN and Parkinson's disease likely involves:

Expression Pattern

GAIN is expressed in various tissues with high expression in:

• Brain (particularly in neurons)
• Heart
• Skeletal muscle
• Testis

Related Proteins

GAIN belongs to the GABARAP family which includes:

• [GABARAP](/proteins/gabarap) - GABA-A Receptor Associated Protein
• [GABARAPL1](/proteins/gabarapl1) - GABARAP-like protein 1
• GABARAPL3 (also known as GAIN)
• GABARAPL4 - GABARAP-like protein 4

Clinical Significance

Parkinson's Disease

• GWAS-confirmed risk gene for sporadic Parkinson's disease
• May influence age of onset and disease progression
• Potential therapeutic target for modulating autophagy

Other Neurological Conditions

Dysregulation of GAIN has been implicated in:

• [Alzheimer's disease](/diseases/alzheimers-disease)
• Huntington's disease
• Amyotrophic lateral sclerosis (ALS)

Research Directions

See Also

• [Alpha-Synuclein](/proteins/alpha-synuclein) Protein that aggregates in PD
• LRRK2 - Common PD risk gene
• Parkin - Parkinson's disease gene involved in mitophagy
• Autophagy - Cellular degradation pathway
• Mechanisms of Parkinson's Disease

References

Pathway Diagram

The following diagram shows the key molecular relationships involving GAIN Gene - GABA-A Receptor Associated Protein Like 2 discovered through SciDEX knowledge graph analysis: