STAM1 - Signal Transducing Adaptor Molecule 1

STAM1 — Signal Transducing Adaptor Molecule 1

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">STAM1 - Signal Transducing Adaptor Molecule 1</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>STAM1</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Signal Transducing Adaptor Molecule 1</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>10p13</td>
</tr>
<tr>
<td class="label">Protein Size</td>
<td>425 amino acids</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~56 kDa</td>
</tr>
<tr>
<td class="label">Expression</td>
<td>Ubiquitous, high in brain</td>
</tr>
<tr>
<td class="label">Gene</td>
<td>Interaction</td>
</tr>
<tr>
<td class="label">[GBA](/genes/gba)</td>
<td>Lysosomal function</td>
</tr>
<tr>
<td class="label">[LRRK2](/genes/lrrk2)</td>
<td>Endocytic trafficking</td>
</tr>
<tr>
<td class="label">[SNCA](/genes/snca)</td>
<td>Autophagy regulation</td>
</tr>
<tr>
<td class="label">[DNAJC13](/genes/dnajc13)</td>
<td>Endosomal sorting</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

Overview

STAM1 — Signal Transducing Adaptor Molecule 1

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">STAM1 - Signal Transducing Adaptor Molecule 1</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>STAM1</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Signal Transducing Adaptor Molecule 1</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>10p13</td>
</tr>
<tr>
<td class="label">Protein Size</td>
<td>425 amino acids</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~56 kDa</td>
</tr>
<tr>
<td class="label">Expression</td>
<td>Ubiquitous, high in brain</td>
</tr>
<tr>
<td class="label">Gene</td>
<td>Interaction</td>
</tr>
<tr>
<td class="label">[GBA](/genes/gba)</td>
<td>Lysosomal function</td>
</tr>
<tr>
<td class="label">[LRRK2](/genes/lrrk2)</td>
<td>Endocytic trafficking</td>
</tr>
<tr>
<td class="label">[SNCA](/genes/snca)</td>
<td>Autophagy regulation</td>
</tr>
<tr>
<td class="label">[DNAJC13](/genes/dnajc13)</td>
<td>Endosomal sorting</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

Overview

STAM1 (Signal Transducing Adaptor Molecule 1) is a key component of the endolysosomal pathway that has been recently identified as a novel [Parkinson's disease](/diseases/parkinsons-disease) therapeutic target[@stam1_pd_2024]. The gene encodes a protein involved in endosomal sorting, autophagy, and lysosomal degradation — processes critical for clearing [alpha-synuclein](/proteins/alpha-synuclein) aggregates.

Gene Information

Function

Domain Structure

STAM1 contains several functional domains:

• UIM (Ubiquitin-Interacting Motif) — binds ubiquitin-tagged proteins
• VHS domain — cargo sorting
• SH3 domain — protein-protein interactions
• ITAM motif — signaling functions

Role in Endolysosomal Pathway

STAM1 is a component of the ESCRT-0 complex:

ESCRT Complex Functions

The ESCRT (Endosomal Sorting Complex Required for Transport) machinery[@endolysosomal_pathway]:

STAM1 in Parkinson's Disease

Discovery as PD Target

Genome-wide studies identified STAM1 as a novel PD therapeutic target[@stam1_pd_2024]:

• Multi-omics evidence: Transcriptomic, proteomic, and epigenomic data
• Endolysosomal dysfunction: Implicated in PD pathogenesis
• Alpha-synuclein clearance: Critical pathway for protein aggregation

Pathogenic Mechanisms

STAM1 dysregulation contributes to PD through:

Therapeutic Potential

Targeting STAM1 offers therapeutic benefits:

• Enhance alpha-synuclein clearance — restore autophagy
• Improve endosomal function — normalize trafficking
• Reduce protein aggregation — decrease toxic species

Connection to Other PD Genes

STAM1 interacts with several known PD genes:

Clinical Relevance

Genetic Studies

• GWAS: STAM1 variants associated with PD risk
• Expression studies: Altered expression in PD brain
• Multi-omics: Integration of multiple data types

Biomarker Potential

STAM1 could serve as:

• Diagnostic marker — peripheral blood expression
• Progression marker — disease severity correlation
• Treatment response — therapeutic target engagement

Cross-Links

Related Genes

• [STAM2](/genes/stam2) — paralog with similar function
• [GBA](/genes/gba) — lysosomal glucocerebrosidase
• [LRRK2](/genes/lrrk2) — leucine-rich repeat kinase 2
• [SNCA](/genes/snca) — alpha-synuclein

Related Mechanisms

• [Endolysosomal pathway](/mechanisms/endosomal-lysosomal-pathway)
• [Autophagy in PD](/mechanisms/autophagy-parkinsons)
• [Alpha-synuclein clearance](/mechanisms/alpha-synuclein-clearance)
• [ESCRT complex](/mechanisms/esCRT-machinery)

Related Diseases

• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Dementia with Lewy Bodies](/diseases/dementia-lewy-bodies)
• [Parkinson's Disease Genetic Forms](/diseases/parkinsons-genetic-forms)

References

See Also

• [STAM2 Gene](/genes/stam2)
• [Parkinson's Disease Genes](/diseases/parkinsons-disease)
• [Endolysosomal Pathway](/mechanisms/endosomal-lysosomal-pathway)