DCTN1 Protein

DCTN1 Protein

Introduction

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">DCTN1 Protein</th>
</tr>
<tr>
<td class="label">Protein Name</td>
<td>Dynactin Subunit 1 (p150^Glued)</td>
</tr>
<tr>
<td class="label">Gene</td>
<td>DCTN1</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>Q14203</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>150 kDa (p150 subunit)</td>
</tr>
<tr>
<td class="label">Subcellular Localization</td>
<td>Cytoplasm, neuronal axons, growth cones</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>Dynactin complex</td>
</tr>
<tr>
<td class="label">PDB Structures</td>
<td>3K7J, 4DRW</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">ALS</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">2 edges</a></td>
</tr>
</table>

Dctn1 Protein 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

DCTN1 Protein

Introduction

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">DCTN1 Protein</th>
</tr>
<tr>
<td class="label">Protein Name</td>
<td>Dynactin Subunit 1 (p150^Glued)</td>
</tr>
<tr>
<td class="label">Gene</td>
<td>DCTN1</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>Q14203</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>150 kDa (p150 subunit)</td>
</tr>
<tr>
<td class="label">Subcellular Localization</td>
<td>Cytoplasm, neuronal axons, growth cones</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>Dynactin complex</td>
</tr>
<tr>
<td class="label">PDB Structures</td>
<td>3K7J, 4DRW</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">ALS</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">2 edges</a></td>
</tr>
</table>

Dctn1 Protein 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

DCTN1 (Dynactin Subunit 1), also known as p150^Glued, is the largest and most functionally significant subunit of the dynactin complex. The dynactin complex is essential for cytoplasmic dynein-mediated retrograde axonal transport, which is critical for neuronal survival, synaptic function, and protein homeostasis. Mutations in DCTN1 cause several neurodegenerative disorders, including familial amyotrophic lateral sclerosis (ALS), Perry syndrome, and pallidopyramidal degeneration (PDB).

Protein Information

Structure

DCTN1/p150^Glued is a 1,238 amino acid protein with several distinct domains:

• N-terminal CAP-Gly domain: Binds to microtubules and tubulin dimers
• Coiled-coil domains: Mediate protein-protein interactions within the dynactin complex
• Arginine-rich region: Involved in cargo binding
• PEST sequences: Signal for protein degradation

Normal Function

DCTN1 plays critical roles in neuronal function:

The dynactin-dynein complex is the primary motor for long-range retrograde transport in [neurons](/entities/neurons), moving cargo up to 2 μm per second.

Role in Disease

Amyotrophic Lateral Sclerosis (ALS)

DCTN1 mutations cause familial ALS with autosomal dominant inheritance:

• G59S mutation: First identified in a family with ALS and PDB[@puls2005]
• K56R mutation: Found in ALS patients with frontal lobe dysfunction[@levy2006]
• Mutations disrupt:
• Retrograde axonal transport
• Synaptic vesicle trafficking
• [Autophagy](/entities/autophagy) and protein clearance
• Mitochondrial function

Perry Syndrome

DCTN1 mutations cause an atypical parkinsonian syndrome characterized by:

• Progressive parkinsonism
• Depression and apathy
• Rapid weight loss
• Central hypoventilation
• Short disease duration (average 5 years)[@wider2010]

Pallidopyramidal Degeneration (PDB)

• Combination of parkinsonism and pyramidal signs
• Often associated with ALS features

Expression Pattern

DCTN1 is ubiquitously expressed but highest in:

• Motor neurons (spinal cord, motor cortex)
• Dopaminergic neurons (substantia nigra)
• Hippocampal pyramidal neurons
• Cerebellar Purkinje cells
• Peripheral sensory neurons

Therapeutic Targeting

Several strategies are being explored:

Animal Models

• Dctn1 G59S knock-in mice: Show transport deficits and motor neuron degeneration
• DCTN1 siRNA knockdown: Causes axonal transport defects
• Drosophila models: Recapitulate transport defects and neurodegeneration

See Also

• [ALS](/diseases/amyotrophic-lateral-sclerosis)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Perry Syndrome](/diseases/perry-syndrome)
• [Axonal Transport Pathway](/mechanisms/axonal-transport)
• [Dynein Complex](/mechanisms/axonal-transport)
• [Motor Neuron Disease](/diseases/motor-neuron-disease)

External Links

• [NCBI Gene: DCTN1](https://www.ncbi.nlm.nih.gov/gene/10521)
• [UniProt: DCTN1](https://www.uniprot.org/uniprot/Q14203)
• [OMIM: DCTN1](https://www.omim.org/entry/601143)

Background

The study of Dctn1 Protein 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 DCTN1 Protein discovered through SciDEX knowledge graph analysis: