DES Gene

DES Gene

Overview

Des Gene plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

<div class="infobox infobox-gene">
<table>
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">Desmin</th></tr>
<tr><td><strong>Gene Symbol</strong></td><td>DES</td></tr>
<tr><td><strong>Full Name</strong></td><td>Desmin</td></tr>
<tr><td><strong>Chromosome</strong></td><td>2q35</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>1674</td></tr>
<tr><td><strong>OMIM</strong></td><td>125660</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000175084</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>P17661</td></tr>
<tr><td><strong>Protein Length</strong></td><td>470 amino acids</td></tr>
<tr><td><strong>Molecular Weight</strong></td><td>53,350 Da</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Myofibrillar Myopathy, Dilated Cardiomyopathy, Charcot-Marie-Tooth Disease, Neurodegeneration</td></tr>
</table>
</div>

Introduction

DES Gene

Overview

Des Gene plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

<div class="infobox infobox-gene">
<table>
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">Desmin</th></tr>
<tr><td><strong>Gene Symbol</strong></td><td>DES</td></tr>
<tr><td><strong>Full Name</strong></td><td>Desmin</td></tr>
<tr><td><strong>Chromosome</strong></td><td>2q35</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>1674</td></tr>
<tr><td><strong>OMIM</strong></td><td>125660</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000175084</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>P17661</td></tr>
<tr><td><strong>Protein Length</strong></td><td>470 amino acids</td></tr>
<tr><td><strong>Molecular Weight</strong></td><td>53,350 Da</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Myofibrillar Myopathy, Dilated Cardiomyopathy, Charcot-Marie-Tooth Disease, Neurodegeneration</td></tr>
</table>
</div>

Introduction

The DES gene encodes desmin, a muscle-specific type III intermediate filament protein that is a critical structural component of muscle cells[@paulin2004]. Desmin forms a continuous network throughout the muscle fiber, connecting Z-discs to the sarcolemma, mitochondria, and nuclear envelope[@capetanaki2015]. This network is essential for maintaining muscle fiber integrity, force transmission, and proper organization of the contractile apparatus[@herrmann2007].

Desmin is one of the earliest muscle-specific proteins expressed during development and is crucial for the formation and maintenance of myofibrils[@frst1989]. Beyond its structural role, desmin participates in cellular signaling, organelle positioning, and mechanotransduction[@hnia2015].

Gene Structure

The DES gene is located on chromosome 2q35 and consists of nine exons spanning approximately 8.4 kb of genomic DNA[@li1999]. The gene encodes a 470-amino acid protein with a molecular weight of approximately 53 kDa[@geisler1992]. The protein has a central alpha-helical rod domain flanked by non-helical head and tail domains, characteristic of intermediate filament proteins.

Protein Structure

Desmin exhibits the classic intermediate filament protein architecture:

• N-terminal head domain (residues 1-99): Contains phosphorylation sites and regulates filament assembly
• Central rod domain (residues 100-411): Consists of four alpha-helical segments (1A, 1B, 2A, 2B) separated by linkers, responsible for dimerization and filament assembly
• C-terminal tail domain (residues 412-470): Mediates lateral interactions between filaments and interactions with organelles

Molecular Functions

Structural Integrity

Desmin provides structural support to muscle cells through:

Signaling Functions

Desmin participates in cellular signaling pathways:

• Mechanical signaling: Acts as a mechanosensor, transducing mechanical forces into biochemical signals
• Muscle differentiation: Regulates myoblast fusion and differentiation
• Protein quality control: Coordinates with the ubiquitin-proteasome system for damaged protein clearance[@van2011]

Expression Pattern

Normal Expression

Desmin is expressed in:

• Skeletal muscle: All fiber types (Type I, IIa, IIb, IIx), with highest expression in slow-twitch fibers
• Cardiac muscle: Ventricular and atrial myocytes, conduction system cells
• Smooth muscle: Vascular smooth muscle, visceral smooth muscle
• Some glial cells: Satellite glial cells, olfactory ensheathing cells[@pekny2014]

Developmental Regulation

Desmin expression begins early in embryogenesis, with transcripts detectable in somites by embryonic day 9.5 in mice[@schaart2001]. The protein becomes organized into a network during late embryonic development as myofibrils mature.

Disease Associations

Myofibrillar Myopathy (MFM)

Myofibrillar myopathies are a group of genetically heterogeneous disorders characterized by progressive muscle weakness and myopathological features including desmin-positive aggregates[@selcen2011]. DES mutations account for approximately 20-30% of MFM cases.

| Mutation | Domain | Phenotype | Year Described |
|----------|--------|-----------|----------------|
| R350P | Tail | MFM + cardiomyopathy | 1998 |
| E413K | Tail | MFM + cardiomyopathy | 2000 |
| A360P | Rod | MFM | 2005 |
| N342I | Tail | MFM + respiratory failure | 2007 |

Pathogenic mechanisms include:

• Disrupted filament assembly and aggregation
• Impaired autophagy and protein clearance
• Mitochondrial dysfunction
• Disrupted sarcomere organization[@oliv2009]

Dilated Cardiomyopathy (DCM)

DES mutations cause approximately 1-2% of familial dilated cardiomyopathy cases[@mcnally2013]. The cardiac phenotype often precedes skeletal muscle involvement.

• Clinical features: LV dilation, systolic dysfunction, arrhythmias, heart failure
• Pathology: Myocardial fiber disarray, interstitial fibrosis, desmin-positive aggregates
• Treatment: Standard heart failure therapy, cardiac transplantation in advanced cases[@taylor2007]

Charcot-Marie-Tooth Disease (CMT)

Autosomal dominant intermediate neuropathy due to DES mutations has been described, characterized by:

• Intermediate motor nerve conduction velocities
• Mild to moderate motor weakness
• Foot deformities (pes cavus, hammertoes)
• Rare cardiomyopathy[@drew2011]

Neurological Involvement

While primarily a muscle disease, DES mutations can have neurological manifestations:

• Peripheral neuropathy: Sensorimotor axonal or intermediate neuropathy
• Respiratory failure: Due to diaphragm muscle involvement
• Dysphagia: Bulbar muscle weakness in some patients[@wang2019]

Mechanistic Pathways

Protein Aggregation Pathway

Mitochondrial Dysfunction Pathway

DES mutations lead to mitochondrial abnormalities:

• Mispositioned mitochondria
• Impaired mitochondrial dynamics (fusion/fission)
• Reduced ATP production
• Increased reactive oxygen species[@winter2014]

Animal Models

Knockout Mice

• DES null mice develop cardiomyopathy but are viable
• Skeletal muscle shows subtle ultrastructural changes
• Accelerated age-related muscle weakness[@milner1996]

Transgenic Models

• Wild-type DES overexpression rescues knockout phenotypes
• Mutant DES overexpression reproduces human disease features[@wang2001]

Therapeutic Approaches

Gene Therapy

• AAV-mediated DES delivery to restore functional protein
• CRISPR-based allele-specific editing for dominant mutations
• Antisense oligonucleotides to suppress mutant allele expression[@mofid2017]

Small Molecule Approaches

• Proteostasis modulators to enhance mutant protein clearance
• Anti-aggregation compounds
• Mitochondrial protective agents[@schoser2017]

Supportive Care

• Cardiac monitoring and management
• Physical therapy
• Respiratory support when needed

See Also

• [DES Protein](/proteins/des-protein)
• [Intermediate Filaments](/proteins/intermediate-filaments)
• [Myofibrillar Myopathy](/genes/ar)
• [Dilated Cardiomyopathy](/diseases/cardiomyopathy)
• [Charcot-Marie-Tooth Disease](/diseases/charcot-marie-tooth-disease)
• [Mitochondrial Dysfunction](/mechanisms/mitochondrial-dysfunction)
• [Muscle Proteins](/content/proteins)

External Links

• [NCBI Gene: DES](https://www.ncbi.nlm.nih.gov/gene/1674)
• [UniProt: P17661](https://www.uniprot.org/uniprot/P17661)
• [Ensembl: ENSG00000175084](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000175084)
• [OMIM: 125660](https://www.omim.org/entry/125660)

Overview

Des Gene plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

Background

The study of Des 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 DES Gene discovered through SciDEX knowledge graph analysis: