DYNC1H1 — Dynein Cytoplasmic 1 Heavy Chain 1
<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">DYNC1H1 — Dynein Cytoplasmic 1 Heavy Chain 1</th>
</tr>
<tr> [@amabile2020]
<td class="label">Symbol</td> [@orimckenney2010]
<td><strong>DYNC1H1</strong></td> [@hoang2017]
</tr> [@garrett2014]
<tr> [@qu2025]
<td class="label">Full Name</td>
<td>Dynein Cytoplasmic 1 Heavy Chain 1</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>14q32.31</td>
</tr>
<tr>
<td class="label">NCBI Gene</td>
<td><a href="https://www.ncbi.nlm.nih.gov/gene/1778" target="_blank">1778</a></td>
</tr>
<tr>
<td class="label">Ensembl</td>
<td><a href="https://ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000197958" target="_blank">ENSG00000197958</a></td>
</tr>
<tr>
<td class="label">OMIM</td>
<td><a href="https://omim.org/entry/600112" target="_blank">600112</a></td>
</tr>
<tr>
<td class="label">UniProt</td>
<td><a href="https://www.uniprot.org/uniprot/Q14204" target="_blank">Q14204</a></td>
</tr>
<tr>
<td class="label">Diseases</td>
<td>[Spinal Muscular Atrophy](/diseases/spinal-muscular-atrophy), Cortical Malformations, Charcot-Marie-Tooth Disease, Hereditary Spastic Paraplegia</td>
</tr>
<tr>
<td class="label">Expression</td>
<td>Motor neurons, Cerebral cortex, Widespread</td>
</tr>
<tr>
<th class="infobox-subheader" colspan="2">Key Mutations</th>
</tr>
<tr>
<td colspan="2" style="font-size:0.85em">H3822P<br>R3344Q<br>I584L<br>K3241T<br>T4588M</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>
DYNC1H1 — Dynein Cytoplasmic 1 Heavy Chain 1
Brain Atlas Resources
- [Allen Human Brain Atlas search: DYNC1H1](https://human.brain-map.org/search?searchText=DYNC1H1)
- [Allen Mouse Brain Atlas search: DYNC1H1](https://mouse.brain-map.org/search/index.html?query=DYNC1H1)
- [Allen Brain Map portal search: DYNC1H1](https://portal.brain-map.org/search?query=DYNC1H1)
- [BrainSpan developmental transcriptome search: DYNC1H1](https://www.brainspan.org/search/index.html?search=DYNC1H1)
Introduction
Dync1H1 — Dynein Cytoplasmic 1 Heavy Chain 1 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
DYNC1H1 (Dynein Cytoplasmic 1 Heavy Chain 1) is a large gene located on chromosome 14q32.31 that encodes the heavy chain subunit of the cytoplasmic dynein 1 motor complex—the primary motor for retrograde axonal transport along microtubules. Heterozygous mutations in DYNC1H1 cause a spectrum of autosomal dominant neurological disorders including spinal muscular atrophy with lower extremity predominance (SMA-LED), cortical malformations with intellectual disability, axonal Charcot-Marie-Tooth disease (CMT2O), and hereditary spastic paraplegia ([Harms et al., 2012](https://doi.org/10.1016/j.ajhg.2012.10.011); [Weedon et al., 2011](https://doi.org/10.1016/j.ajhg.2011.07.002)). The gene is catalogued as NCBI Gene ID [1778](https://www.ncbi.nlm.nih.gov/gene/1778) and OMIM [600112](https://omim.org/entry/600112).
Function
The Cytoplasmic Dynein Motor Complex
DYNC1H1 encodes the 532-kDa heavy chain of cytoplasmic dynein 1, the major minus-end-directed microtubule motor protein in mammalian cells. Dynein transports diverse cargo including [mitochondria](/entities/mitochondria), endosomes, lysosomes, signaling endosomes, and mRNA granules from the distal axon back toward the cell body (retrograde transport). The heavy chain contains an N-terminal tail domain (cargo binding and dynactin interaction), a linker domain, a ring of six AAA+ ATPase domains that generate force, and a microtubule-binding domain at the tip of a coiled-coil stalk ([Roberts et al., 2013](https://doi.org/10.1038/nrm3667)).
Retrograde Axonal Transport
Motor [neurons](/entities/neurons) are particularly vulnerable to dynein dysfunction due to their exceptionally long axons (up to 1 meter in humans). Dynein-mediated retrograde transport is essential for:
- Neurotrophic factor signaling: Transport of [BDNF](/proteins/bdnf)- and [GDNF](/proteins/gdnf)-containing signaling endosomes from synaptic terminals to the soma.
- Mitochondrial quality control: Transport of damaged mitochondria back to the soma for degradation.
- Autophagosome maturation: Retrograde transport of autophagosomes for lysosomal fusion.
- Injury signaling: Rapid injury signals from axon terminals to the nucleus.
Cortical Neuronal Migration
During brain development, dynein is critical for neuronal migration in the cerebral [cortex](/brain-regions/cortex). DYNC1H1 mutations that impair dynein function during development cause cortical malformations including pachygyria, polymicrogyria, and neuronal heterotopia ([Poirier et al., 2013](https://doi.org/10.1002/humu.22236)).
Brain Expression
DYNC1H1 is ubiquitously expressed, with particularly high levels in motor neurons, cerebral cortex, and developing brain. Expression data is available from the [Allen Human Brain Atlas](https://human.brain-map.org/microarray/search/show?search_term=DYNC1H1).
Disease Associations
DYNC1H1 mutations cause a clinical-phenotype continuum ([Amabile et al., 2020](https://doi.org/10.1038/s10038-020-0803-1)):
Spinal Muscular Atrophy with Lower Extremity Predominance (SMA-LED)
The most common DYNC1H1-associated phenotype. Presents with congenital or childhood-onset lower limb wasting and weakness, frequently associated with cognitive impairment. Clinical severity ranges from generalized arthrogryposis and inability to ambulate to mild lower limb weakness ([Harms et al., 2012](https://doi.org/10.1016/j.ajhg.2012.10.011)). Mutations in both the tail and motor domains of DYNC1H1 can cause SMA-LED.
Mutations affecting dynein's role in neuronal migration cause malformations of cortical development (MCD), including pachygyria, polymicrogyria, and periventricular heterotopia, often accompanied by severe intellectual disability and epilepsy ([Poirier et al., 2013](https://doi.org/10.1002/humu.22236)).
Axonal Charcot-Marie-Tooth Disease (CMT2O)
Peripheral motor and sensory neuropathy caused by DYNC1H1 mutations affecting axonal transport in peripheral nerves.
Hereditary Spastic Paraplegia (HSP)
A recent study identified a rare missense variant (p.Thr4588Met) causing autosomal dominant complex HSP in a Chinese family, expanding the clinical spectrum ([Qu et al., 2025](https://doi.org/10.1186/s12920-025-02298-y)).
Key Mutations
| Mutation | Domain | Phenotype |
|----------|--------|-----------|
| H3822P | Motor (AAA4) | SMA-LED with cognitive impairment |
| R3344Q | Motor (AAA3) | SMA-LED |
| I584L | Tail | SMA-LED; destabilizes dynein complex and decreases microtubule affinity ([Ori-McKenney et al., 2010](https://doi.org/10.1083/jcb.200908120)) |
| K3241T | Motor (AAA3) | SMA-LED with cortical malformations |
| T4588M | Motor (AAA6) | Hereditary spastic paraplegia ([Qu et al., 2025](https://doi.org/10.1186/s12920-025-02298-y)) |
Pathogenic Mechanisms
Impaired processivity: SMALED mutations compromise run lengths of processive dynein-dynactin-cargo adaptor complexes, reducing transport efficiency ([Hoang et al., 2017](https://doi.org/10.1073/pnas.1620141114)).
Disrupted complex stability: Tail domain mutations (e.g., I584L) destabilize the dynein complex and decrease microtubule affinity during ATP hydrolysis ([Ori-McKenney et al., 2010](https://doi.org/10.1083/jcb.200908120)).
Altered ERK1/2-cFos signaling: In Loa mice (a DYNC1H1 mutant model), altered transport kinetics lead to disrupted ERK1/2-cFos signaling pathways ([Garrett et al., 2014](https://doi.org/10.1007/s00018-013-1527-z)).
Dominant-negative effects: Most mutations act in a dominant-negative manner, as the heterohexameric dynein complex contains two heavy chains, and incorporation of one mutant chain can impair the entire motor.
Therapeutic Implications
- Microtubule-targeting strategies: Compounds that enhance microtubule stability may compensate for reduced dynein-microtubule affinity.
- Dynein activators: Small molecules that enhance dynein processivity.
- Gene therapy: Potential for allele-specific silencing of dominant-negative mutant alleles.
External Links
- NCBI Gene: [https://www.ncbi.nlm.nih.gov/gene/1778](https://www.ncbi.nlm.nih.gov/gene/1778)
- Ensembl: [https://ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000197958](https://ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000197958)
- OMIM: [https://omim.org/entry/600112](https://omim.org/entry/600112)
- UniProt: [https://www.uniprot.org/uniprot/Q14204](https://www.uniprot.org/uniprot/Q14204)
- Allen Human Brain Atlas: [DYNC1H1 expression](https://human.brain-map.org/microarray/search/show?search_term=DYNC1H1)
See Also
- [Genes Index](/genes)
- [SMN1 — Survival Motor Neuron 1](/proteins/smn1-protein)
- [SOD1 — Superoxide Dismutase 1](/entities/sod1)
- [Proteins Index](/proteins)
- [Amyotrophic Lateral Sclerosis](/diseases/als)
- [Spinal Muscular Atrophy](/diseases/spinal-muscular-atrophy)
Background
The study of Dync1H1 — Dynein Cytoplasmic 1 Heavy Chain 1 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
[Harms MB, et al, Mutations in the tail domain of DYNC1H1 cause dominant spinal muscular atrophy (2012)](https://doi.org/10.1016/j.ajhg.2012.10.011)
[Weedon MN, et al, Exome sequencing identifies a DYNC1H1 mutation in a large pedigree with dominant axonal Charcot-Marie-Tooth disease (2011)](https://doi.org/10.1016/j.ajhg.2011.07.002)
[Roberts AJ, et al, Functions and mechanics of dynein motor proteins (2013)](https://doi.org/10.1038/nrm3667)
[Poirier K, et al, Mutations in TUBG1, DYNC1H1, KIF5C, and KIF2A cause malformations of cortical development and microcephaly (2013)](https://doi.org/10.1002/humu.22236)
[Amabile S, et al, The clinical-phenotype continuum in DYNC1H1-related disorders (2020)](https://doi.org/10.1038/s10038-020-0803-1)
[Ori-McKenney KM, et al, A cytoplasmic dynein tail mutation impairs motor processivity (2010)](https://doi.org/10.1083/jcb.200908120)
[Hoang HT, et al, DYNC1H1 mutations associated with neurological diseases compromise processivity of dynein-dynactin-cargo adaptor complexes (2017)](https://doi.org/10.1073/pnas.1620141114)
[Garrett CA, et al, DYNC1H1 mutation alters transport kinetics and ERK1/2-cFos signalling in a mouse model of distal spinal muscular atrophy (2014)](https://doi.org/10.1007/s00018-013-1527-z)
[Qu YJ, et al, Expanding the clinical phenotype of DYNC1H1-associated mutations: a Chinese family with autosomal dominant complex hereditary spastic paraplegia (2025)](https://doi.org/10.1186/s12920-025-02298-y)