VPS54 Protein

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VPS54 Protein

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VPS54 Protein

Overview

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">VPS54 Protein</th>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>[Q9P291](https://www.uniprot.org/uniprot/Q9P291)</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~97 kDa</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>760 amino acids</td>
</tr>
<tr>
<td class="label">Cellular Localization</td>
<td>Golgi apparatus, Endosomes, Cytosol</td>
</tr>
<tr>
<td class="label">PDB Structures</td>
<td>None determined</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>GARP/HOPS tethering complexes</td>
</tr>
<tr>
<td class="label">Process</td>
<td>Role of VPS54</td>
</tr>
<tr>
<td class="label">Protein Trafficking</td>
<td>Cargo recognition and vesicle targeting</td>
</tr>
<tr>
<td class="label">Lysosomal Delivery</td>
<td>Directs proteins to lysosomes for degradation</td>
</tr>
<tr>
<td class="label">Autophagy</td>
<td>Autophagosome-lysosome fusion</td>
</tr>
<tr>
<td class="label">Membrane Recycling</td>
<td>Returns receptors and transporters to surface</td>
</tr>
<tr>
<td class="label">Approach</td>
<td>Rationale</td>
</tr>
<tr>
<td class="label">Autophagy Enhancement</td>
<td>Boost lysosomal clearance</td>
</tr>
<tr>
<td class="label">Trafficking Modulators</td>
<td>Improve vesicular function</td>
</tr>
<tr>
<td cl

...

VPS54 Protein

Overview

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">VPS54 Protein</th>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>[Q9P291](https://www.uniprot.org/uniprot/Q9P291)</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~97 kDa</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>760 amino acids</td>
</tr>
<tr>
<td class="label">Cellular Localization</td>
<td>Golgi apparatus, Endosomes, Cytosol</td>
</tr>
<tr>
<td class="label">PDB Structures</td>
<td>None determined</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>GARP/HOPS tethering complexes</td>
</tr>
<tr>
<td class="label">Process</td>
<td>Role of VPS54</td>
</tr>
<tr>
<td class="label">Protein Trafficking</td>
<td>Cargo recognition and vesicle targeting</td>
</tr>
<tr>
<td class="label">Lysosomal Delivery</td>
<td>Directs proteins to lysosomes for degradation</td>
</tr>
<tr>
<td class="label">Autophagy</td>
<td>Autophagosome-lysosome fusion</td>
</tr>
<tr>
<td class="label">Membrane Recycling</td>
<td>Returns receptors and transporters to surface</td>
</tr>
<tr>
<td class="label">Approach</td>
<td>Rationale</td>
</tr>
<tr>
<td class="label">Autophagy Enhancement</td>
<td>Boost lysosomal clearance</td>
</tr>
<tr>
<td class="label">Trafficking Modulators</td>
<td>Improve vesicular function</td>
</tr>
<tr>
<td class="label">Gene Therapy</td>
<td>Increase VPS54 expression</td>
</tr>
<tr>
<td class="label">Small Molecule Stabilizers</td>
<td>Stabilize GARP/HOPS</td>
</tr>
<tr>
<td class="label">Protein</td>
<td>Complex</td>
</tr>
<tr>
<td class="label">VPS52</td>
<td>GARP</td>
</tr>
<tr>
<td class="label">VPS53</td>
<td>GARP</td>
</tr>
<tr>
<td class="label">VPS51</td>
<td>GARP</td>
</tr>
<tr>
<td class="label">VPS39</td>
<td>HOPS</td>
</tr>
<tr>
<td class="label">VPS41</td>
<td>HOPS</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

VPS54 (Vacuolar Protein Sorting 54) is a key component of the GARP (Golgi-Associated Retrograde Protein) and HOPS (Homotypic fusion and Vacuolar Protein Sorting) tethering complexes. These complexes are essential for endosomal-lysosomal trafficking and Golgi function. VPS54 has been implicated in neurodegenerative diseases, particularly through its role in protein sorting and trafficking.

Structure

Domain Architecture

N-terminal region: Interaction domain for GARP/HOPS complex assembly

Central helical domain: Coiled-coil regions for protein interactions

C-terminal WD40-like repeats: Beta-propeller structure for protein binding

VPS54 C-terminal domain: Critical for complex function and localization

Complex Association

VPS54 exists in two main complexes:

GARP Complex:

VPS52, VPS53, VPS54, VPS51
Tethers retrieval vesicles from endosomes to trans-Golgi network (TGN)
Regulates retrograde trafficking

HOPS Complex:

VPS11, VPS16, VPS18, VPS33A/B, VPS39, VPS41
Mediates endosomal-lysosomal fusion
Critical for autophagy and lysosomal function

Normal Function

VPS54 plays essential roles in membrane trafficking: [@hops2020]

Vesicle Tethering

Retrograde Transport: Tethers vesicles returning from endosomes to Golgi

Endosomal Sorting: Directs cargo to lysosomal degradation pathway

Golgi Maintenance: Preserves Golgi structure and function

Autophagosome-Lysosome Fusion: HOPS role in autophagy

Cellular Processes

Tissue Expression

Ubiquitous expression, highest in brain
Neurons: High expression in synapses and cell bodies
Glia: Present in astrocytes and microglia
Important for neuronal protein homeostasis

Role in Neurodegeneration

Parkinson's Disease

VPS54 is indirectly linked to PD through its role in trafficking of PD-related proteins: [@retromer2019]

LRRK2 Trafficking: GARP complex regulates LRRK2 subcellular localization
α-Synuclein Clearance: Lysosomal trafficking important for α-syn clearance
VPS35 Interaction: VPS35 (PD gene) works with VPS54 in retromer pathway
Dopaminergic Vulnerability: Trafficking deficits may contribute to neuron death

Alzheimer's Disease

APP Trafficking: GARP regulates APP processing and amyloidogenesis
Tau Secretion: Involved in tau spreading via extracellular vesicles
Lysosomal Function: HOPS complex critical for Aβ clearance
Autophagy Impairment: Links to AD autophagy-lysosomal pathway defects

Amyotrophic Lateral Sclerosis

Protein Aggregate Clearance: Impaired lysosomal trafficking in ALS
TDP-43 Localization: GARP may regulate TDP-43 trafficking
Mitochondrial Quality Control: Autophagy defects contribute to ALS pathology

Huntington's Disease

Mutant Huntingtin: Impairs GARP/HOPS function
Autophagy Defects: Contributes to accumulation of protein aggregates
Vesicular Trafficking: Overall trafficking deficits in HD

Therapeutic Targeting

Therapeutic Strategies

Challenges

Complex biology of vesicle trafficking
Redundancy in trafficking pathways
Blood-brain barrier delivery
Specificity for neuronal vs. systemic effects

Genetics & Variants

VPS54 gene located on chromosome 2p21
Mouse model: Vps54 mutation causes neurodegeneration (vps54twy/twy mice)
Human variants: Some rare variants associated with neurological disorders
Expression studies: Altered expression in several neurodegenerative diseases

Animal Models

Vps54 mutant mice: Develop neurodegeneration phenotype
Drosophila ortholog: Validated in fly models
Zebrafish: Used for developmental studies

Interactions

Core Complex Partners

VPS35: PD gene product, functions in same pathway
LRRK2: Kinase that regulates trafficking
SNX3: Retromer component
RAB proteins: RAB6, RAB11 in vesicle targeting

Biomarkers & Research

VPS54 expression: Potential biomarker for trafficking defects
GARP function assays: Measure complex activity
Lysosomal flux: Downstream readout of function

External Links

[UniProt: Q9P291](https://www.uniprot.org/uniprot/Q9P291)
[PDB structures](https://www.rcsb.org/search?q=uniprot:Q9P291)

Cross-Links

GARP Complex
HOPS Complex
[Vesicle Trafficking](/mechanisms/vesicle-trafficking-neurodegeneration)
[Autophagy](/mechanisms/autophagy-neurodegeneration)
Lysosomal Function
[Parkinson's Disease](/diseases/parkinsons-disease)
[Alzheimer's Disease](/diseases/alzheimers-disease)
VPS54 Gene

References

[Unknown, GARP complex in neuronal function (2021) (2021)](https://doi.org/10.1016/j.tcb.2021.03.005)

[Unknown, HOPS complex in autophagy (2020) (2020)](https://doi.org/10.1080/15548627.2020.1728097)

[Unknown, Retromer pathway in Parkinson's disease (2019) (2019)](https://doi.org/10.1038/s41582-019-0223-z)

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Related Entities

VPS54PROTEIN

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slug	proteins-vps54-protein
kg_node_id	VPS54PROTEIN
entity_type	protein
origin_type	v1_polymorphic_backfill
source_table	wiki_pages
wiki_page_id	wp-aa663bc49bdf
__merged_from	{'merged_at': '2026-05-13', 'unprefixed_id': 'proteins-vps54-protein'}
_schema_version	1

📊 Evidence Profile

Evidence Balance

+0%

Certainty

45%

Debates

0

Incoming

9

Outgoing

10

0 supporting 0 contradicting 0 neutral

View full evidence profile →

Public annotations (0)Annotate on Hypothes.is →

No public annotations yet.

📗 Cite This Artifact

VPS54 Protein

VPS54 Protein

Overview

VPS54 Protein

Overview

Structure

Domain Architecture

Complex Association

Normal Function

Vesicle Tethering

Cellular Processes

Tissue Expression

Role in Neurodegeneration

Parkinson's Disease

Alzheimer's Disease

Amyotrophic Lateral Sclerosis

Huntington's Disease

Therapeutic Targeting

Therapeutic Strategies

Challenges

Genetics & Variants

Animal Models

Interactions

Core Complex Partners

Biomarkers & Research

See Also

External Links

Cross-Links

References

💬 Discussion

📗 Cite This Artifact

VPS54 Protein

VPS54 Protein

Overview

VPS54 Protein

Overview

Structure

Domain Architecture

Complex Association

Normal Function

Vesicle Tethering

Cellular Processes

Tissue Expression

Role in Neurodegeneration

Parkinson's Disease

Alzheimer's Disease

Amyotrophic Lateral Sclerosis

Huntington's Disease

Therapeutic Targeting

Therapeutic Strategies

Challenges

Genetics & Variants

Animal Models

Interactions

Core Complex Partners

Disease-Related Interactions

Biomarkers & Research

See Also

External Links

Cross-Links

References

💬 Discussion