DLK — Dual Leucine Zipper Kinase

DLK Gene (Dual Leucine Zipper Kinase)

<div class="infobox infobox-gene">
<div class="infobox-header">Dual Leucine Zipper Kinase</div>

<div class="infobox-row">
<span class="infobox-label">Gene Symbol</span>
<span class="infobox-value">DLK</span>
</div>
<div class="infobox-row">
<span class="infobox-label">Full Name</span>
<span class="infobox-value">Dual Leucine Zipper Kinase (MAP3K12)</span>
</div>
<div class="infobox-row">
<span class="infobox-label">Chromosome</span>
<span class="infobox-value">12p13.2</span>
</div>
<div class="infobox-row">
<span class="infobox-label">NCBI Gene ID</span>
<span class="infobox-value">[7786](https://www.ncbi.nlm.nih.gov/gene/7786)</span>
</div>
<div class="infobox-row">
<span class="infobox-label">OMIM</span>
<span class="infobox-value">[604451](https://www.omim.org/entry/604451)</span>
</div>
<div class="infobox-row">
<span class="infobox-label">Ensembl ID</span>
<span class="infobox-value">[ENSG00000116809](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000116809)</span>
</div>
<div class="infobox-row">
<span class="infobox-label">UniProt ID</span>
<span class="infobox-value">[Q16568](https://www.uniprot.org/uniprot/Q16568)</span>
</div>
<div class="infobox-row">
<span class="infobox-label">Associated Diseases</span>
<span class="infobox-value">ALS, Alzheimer's Disease, peripheral neuropathy</span>
</div>
</div>

Overview

DLK Gene (Dual Leucine Zipper Kinase)

<div class="infobox infobox-gene">
<div class="infobox-header">Dual Leucine Zipper Kinase</div>

<div class="infobox-row">
<span class="infobox-label">Gene Symbol</span>
<span class="infobox-value">DLK</span>
</div>
<div class="infobox-row">
<span class="infobox-label">Full Name</span>
<span class="infobox-value">Dual Leucine Zipper Kinase (MAP3K12)</span>
</div>
<div class="infobox-row">
<span class="infobox-label">Chromosome</span>
<span class="infobox-value">12p13.2</span>
</div>
<div class="infobox-row">
<span class="infobox-label">NCBI Gene ID</span>
<span class="infobox-value">[7786](https://www.ncbi.nlm.nih.gov/gene/7786)</span>
</div>
<div class="infobox-row">
<span class="infobox-label">OMIM</span>
<span class="infobox-value">[604451](https://www.omim.org/entry/604451)</span>
</div>
<div class="infobox-row">
<span class="infobox-label">Ensembl ID</span>
<span class="infobox-value">[ENSG00000116809](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000116809)</span>
</div>
<div class="infobox-row">
<span class="infobox-label">UniProt ID</span>
<span class="infobox-value">[Q16568](https://www.uniprot.org/uniprot/Q16568)</span>
</div>
<div class="infobox-row">
<span class="infobox-label">Associated Diseases</span>
<span class="infobox-value">ALS, Alzheimer's Disease, peripheral neuropathy</span>
</div>
</div>

Overview

DLK (Dual Leucine Zipper Kinase, also known as MAP3K12) is a mitogen-activated protein kinase kinase kinase (MAP3K) that plays a critical role in [axonal injury](/mechanisms/axonal-degeneration) signaling. DLK is a key upstream activator of the [JNK pathway](/mechanisms/jnk-signaling-pathway) and has emerged as a promising therapeutic target for neurodegenerative diseases and nerve injury [@miller2009].

Function

DLK functions as a master regulator of the stress-activated protein kinase (SAPK) signaling cascade:

Axonal Injury Response

After axonal injury, DLK is rapidly activated and initiates a signaling cascade that:

Synaptic Function

DLK plays a role in synaptic plasticity and function:

• Regulates synaptic vesicle dynamics
• Modulates [axon initial segment](/cell-types/neurons) integrity
• Influences dendritic spine morphology

Apoptosis

Under pathological conditions, DLK can promote neuronal death through:

• JNK-mediated activation of pro-apoptotic proteins (BIM, BAD)
• Caspase activation
• Transcriptional regulation of cell death genes

The DLK-JNK Pathway in Neurodegeneration

Expression

DLK is predominantly expressed in:

• Motor neurons — highest expression, relevant to ALS
• Sensory neurons — dorsal root ganglia
• [Hippocampus](/brain-regions/hippocampus) — CA1 region
• Cortex — layer 5 pyramidal neurons

Disease Associations

Amyotrophic Lateral Sclerosis (ALS)

DLK is strongly implicated in ALS pathogenesis:

• Elevated activation in ALS motor neurons
• Promotes excitotoxicity and oxidative stress
• Genetic inhibition of DLK extends survival in animal models
• Small molecule DLK inhibitors in clinical development

Alzheimer's Disease

• DLK is elevated in AD brain tissue
• JNK pathway activation correlates with tau pathology
• May contribute to synaptic loss and neuronal death

Peripheral Neuropathy

• DLK mediates chemotherapy-induced peripheral neuropathy
• Involved in diabetic neuropathy
• Inhibition protects against nerve damage

Traumatic Nerve Injury

DLK is activated following nerve injury and drives Wallerian degeneration. Inhibition could potentially:

• Preserve injured axons
• Promote regeneration
• Reduce neuropathic pain

Therapeutic Implications

DLK represents a compelling therapeutic target:

Challenges

• DLK has both degenerative and regenerative roles — complete inhibition may impair nerve repair
• CNS delivery of inhibitors remains challenging
• Need to balance JNK pathway inhibition with normal cellular functions

Cross-references

• [DLK Protein](/proteins/dlk-protein)
• [JNK Signaling Pathway](/mechanisms/jnk-signaling-pathway)
• [Axonal Degeneration](/mechanisms/axonal-degeneration)
• [Wallerian Degeneration](/mechanisms/wallerian-degeneration)
• [ALS Gene](/diseases/amyotrophic-lateral-sclerosis)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Motor Neurons](/cell-types/motor-neurons)

External Links

• [NCBI Gene: DLK](https://www.ncbi.nlm.nih.gov/gene/7786)
• [UniProt: DLK](https://www.uniprot.org/uniprot/Q16568)
• [Ensembl: DLK](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000116809)

References

Pathway Diagram

The following diagram shows the key molecular relationships involving DLK — Dual Leucine Zipper Kinase discovered through SciDEX knowledge graph analysis: