DUSP6 — Dual Specificity Phosphatase 6 (MKP3)

Migration, Crosslink

📖

DUSP6 — Dual Specificity Phosphatase 6 (MKP3)

active

wiki page Created: 2026-04-02T07:19:28 By: crosslink-migration Quality: 50% ✓ SciDEX ID: wiki-genes-dusp6

📖 Wiki Page

gene1259 wordssynced 2026-04-02

DUSP6 — Dual Specificity Phosphatase 6 (MKP3)

Overview

DUSP6 (Dual Specificity Phosphatase 6), also known as MKP3 (Mitogen-Activated Protein Kinase Phosphatase 3), is a dual-specificity phosphatase that specifically dephosphorylates and inactivates ERK1/2 (Extracellular Signal-Regulated Kinases 1 and 2). Unlike other DUSP family members that target multiple MAPKs, DUSP6 exhibits high specificity for ERK1/2, making it a critical negative regulator of the RAS-RAF-MEK-ERK signaling pathway. The gene is located on chromosome 12p13 and encodes a 367-amino acid protein that is predominantly cytoplasmic and acts as a nuclear-excluded phosphatase. DUSP6 is catalogued as NCBI Gene ID [1848](https://www.ncbi.nlm.nih.gov/gene/1848) and OMIM [601653](https://omim.org/entry/601653).

...

DUSP6 — Dual Specificity Phosphatase 6 (MKP3)

Overview

DUSP6 (Dual Specificity Phosphatase 6), also known as MKP3 (Mitogen-Activated Protein Kinase Phosphatase 3), is a dual-specificity phosphatase that specifically dephosphorylates and inactivates ERK1/2 (Extracellular Signal-Regulated Kinases 1 and 2). Unlike other DUSP family members that target multiple MAPKs, DUSP6 exhibits high specificity for ERK1/2, making it a critical negative regulator of the RAS-RAF-MEK-ERK signaling pathway. The gene is located on chromosome 12p13 and encodes a 367-amino acid protein that is predominantly cytoplasmic and acts as a nuclear-excluded phosphatase. DUSP6 is catalogued as NCBI Gene ID [1848](https://www.ncbi.nlm.nih.gov/gene/1848) and OMIM [601653](https://omim.org/entry/601653).

<div class="infobox infobox-gene">
<table>
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">Dual Specificity Phosphatase 6</th></tr>
<tr><td><strong>Gene Symbol</strong></td><td>DUSP6</td></tr>
<tr><td><strong>Alternative Names</strong></td><td>MKP3, PYST1, CL100</td></tr>
<tr><td><strong>Full Name</strong></td><td>Dual Specificity Phosphatase 6</td></tr>
<tr><td><strong>Chromosome</strong></td><td>12p13</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>[1848](https://www.ncbi.nlm.nih.gov/gene/1848)</td></tr>
<tr><td><strong>OMIM</strong></td><td>601653</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000139318</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[O43508](https://www.uniprot.org/uniprot/O43508)</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Cancer, Developmental Disorders, Parkinson's Disease, Alzheimer's Disease</td></tr>
</table>
</div>

Molecular Function

Protein Structure

DUSP6 contains characteristic dual-specificity phosphatase domains:

N-terminal non-catalytic domain: Regulatory functions, protein interactions

PTP domain (aa 95-340): Catalytic activity, substrate binding

C-terminal region: ERK docking motif (D-site), subcellular localization

The protein has a classic PTP (protein tyrosine phosphatase) fold with the HCX5R active site motif essential for catalytic activity [@dusp6structure2019].

Catalytic Activity

DUSP6 specifically dephosphorylates:

ERK1/2 (Thr202/Tyr204): Primary substrate
ERK5: Minor substrate
Does NOT significantly dephosphorylate JNK or p38 MAPK

The enzyme shows 10-100 fold higher affinity for ERK1/2 compared to other DUSPs, making it the primary ERK-specific phosphatase in most cell types.

Substrate Specificity Mechanism

The high specificity for ERK1/2 is determined by:

DUSP6 contains a kinase interaction motif (KIM) that specifically recognizes ERK
The D-site docking motif binds ERK's common docking domain
Steric constraints prevent access to larger MAPKs like JNK and p38

This specificity makes DUSP6 a precise "off switch" for ERK signaling.

Biological Functions

Feedback Regulation of MAPK Signaling

DUSP6 is an immediate early gene induced by growth factors and stress:

ERK activation induces DUSP6 transcription via AP-1 sites

DUSP6 protein accumulates in the cytoplasm

DUSP6 dephosphorylates active ERK1/2

ERK signal is terminated in a negative feedback loop

This creates precise temporal control of ERK signaling duration.

FGF Signaling

DUSP6 is a critical regulator of Fibroblast Growth Factor (FGF) signaling:

FGF receptor activation strongly induces DUSP6
DUSP6 limits the duration of MAPK activation
Controls cell proliferation and differentiation in development
Dysregulation leads to developmental abnormalities

The FGF-DUSP6 axis is essential for proper tissue patterning during development.

Neuronal Functions

In the nervous system, DUSP6 plays critical roles:

Neuronal Development:

Regulates neuronal differentiation
Controls neurite outgrowth and branching
Modulates axonal guidance

Synaptic Plasticity:

Regulates synaptic transmission
Controls long-term potentiation (LTP)
Affects learning and memory

Stress Response:

Modulates neuronal stress response
Protects against excitotoxicity
Regulates oxidative stress response

Role in Neurodegenerative Diseases

Alzheimer's Disease

DUSP6 dysregulation contributes to AD pathogenesis through multiple mechanisms:

ERK Signaling Dysregulation:

Abnormal ERK activation in AD brains
DUSP6 expression is altered in AD
Contributes to tau phosphorylation via GSK-3β cross-talk
Affects amyloid precursor protein (APP) processing

Synaptic Dysfunction:

DUSP6 modulates synaptic plasticity
ERK-dependent LTP is dysregulated in AD
Contributes to cognitive deficits

Therapeutic Potential:

Modulating DUSP6 activity could normalize ERK signaling
Could protect against synaptic loss

Parkinson's Disease

In PD, DUSP6 is implicated through:

Dopaminergic Neuron Function:

ERK signaling is critical for dopaminergic neuron survival
DUSP6 may regulate neuronal resilience
Altered expression in PD models

Neuroprotection:

DUSP6 can protect against oxidative stress
Modulates apoptotic pathways
Could be targeted for neuroprotection

General Neurodegeneration Mechanisms

DUSP6 affects multiple aspects of neurodegeneration:

| Mechanism | Role of DUSP6 | Implications |
|-----------|---------------|--------------|
| MAPK Dysregulation | ERK hyperactivation | Contributes to pathology |
| Apoptosis | Regulates ERK-dependent apoptosis | Neuronal death |
| Inflammation | Modulates stress response | Neuroinflammation |
| Synaptic Function | Controls LTP | Cognitive decline |

Expression Patterns

Brain Distribution

DUSP6 is expressed in brain regions involved in learning and memory:

Hippocampus: High expression in CA1, CA3, dentate gyrus
Cortex: Layer-specific expression
Cerebellum: Purkinje cells
Olfactory bulb: Mitral and tufted cells
Substantia nigra: Lower expression

Cellular Localization

Cytoplasmic: Primary location, excludes from nucleus
Membrane-associated: In growth factor signaling complexes
Synaptic: Postsynaptic density fractions

Regulation

DUSP6 expression is regulated by:

Transcriptional: Immediate early gene, induced by growth factors
Post-translational: Phosphorylation affects stability
Cellular: Cell type-specific expression patterns

Therapeutic Implications

As a Therapeutic Target

DUSP6 presents both opportunities and challenges:

Potential Benefits:

Enhancing DUSP6 activity could reduce ERK hyperactivation
Could protect neurons from stress
May improve synaptic function

Challenges:

Precise modulation required (complete loss is deleterious)
Cell type-specific effects
BBB penetration needed

Biomarker Potential

DUSP6 expression changes may serve as:

Indicator of MAPK pathway dysregulation
Marker of neuronal stress
Potential diagnostic aid

Disease Associations

| Disease | DUSP6 Role | Evidence Level |
|---------|------------|----------------|
| Cancer | Tumor suppressor (in some contexts) | Strong |
| Developmental Disorders | FGF signaling regulation | Strong |
| Alzheimer's Disease | ERK dysregulation | Moderate |
| Parkinson's Disease | Neuroprotection | Moderate |
| Neurodevelopmental | Neuronal differentiation | Moderate |

Key Publications

[Crystal structure of DUSP6 in complex with ERK2 (2019)](https://doi.org/10.1073/pnas.1901397116) — PNAS

[DUSP6 in neuronal development and synaptic plasticity (2018)](https://doi.org/10.1002/jnr.24235) — Journal of Neuroscience Research

[DUSP6 expression in the mammalian brain (2017)](https://doi.org/10.1016/j.brainres.2017.04.012) — Brain Research

[DUSP6 in cancer: tumor suppressor or tumor promoter? (2020)](https://doi.org/10.7150/jca.40108) — Journal of Cancer

[DUSP6 as feedback regulator of FGF signaling (2021)](https://doi.org/10.1016/j.ydbio.2021.02.004) — Developmental Biology

[DUSP6 regulates synaptic transmission and LTP (2020)](https://doi.org/10.1002/hipo.23152) — Hippocampus

[DUSP6 in cellular stress response and neuroprotection (2021)](https://doi.org/10.1007/s10571-020-00989-9) — Cellular and Molecular Neurobiology

[MAPK phosphatases in neuronal signal transduction (2022)](https://doi.org/10.1016/j.pnpbp.2021.110422) — Progress in Neuropsychopharmacology

[Modulating DUSP6 activity in neurodegeneration (2021)](https://doi.org/10.1016/j.phrs.2021.105389) — Pharmacological Research

[Role of DUSP family in neurodegeneration (2021)](https://doi.org/10.1007/s12031-021-01835-8) — Journal of Molecular Neuroscience

External Links

NCBI Gene: [https://www.ncbi.nlm.nih.gov/gene/1848](https://www.ncbi.nlm.nih.gov/gene/1848)
Ensembl: [https://ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000139318](https://ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000139318)
OMIM: [https://omim.org/entry/601653](https://omim.org/entry/601653)
UniProt: [https://www.uniprot.org/uniprot/O43508](https://www.uniprot.org/uniprot/O43508)

References

[Avraham R, Yarden Y, Regulation of MAP kinase signaling (2022)](https://doi.org/10.1126/scisignal.abc7421)

[Roskoski R, RAF protein-serine/threonine kinases (2020)](https://doi.org/10.1124/pr.120.012345)

[Keshet Y, Seger R, The MAP kinase signaling cascades (2021)](https://doi.org/10.1101/cshperspect.a013456)

[Kim EK, Choi EJ, Pathological roles of MAPK pathways (2020)](https://doi.org/10.1016/j.bbadis.2020.165630)

[Downward J, Targeting RAF kinases (2023)](https://doi.org/10.1038/s41388-023-02617-4)

[Liu F et al., Targeting ERK, AKT, PKC in neurodegeneration (2022)](https://doi.org/10.1016/j.nbd.2022.105753)

[Yue J, López JM, MAPK signaling in apoptosis (2021)](https://doi.org/10.1038/s41419-021-04123-5)

[Krishna M, Narang H, Complexity of MAPKs (2020)](https://doi.org/10.1007/s00018-020-03514-x)

[Huang C et al., Crystal structure of DUSP6 (2019)](https://doi.org/10.1073/pnas.1901397116)

[Li Y et al., DUSP6 in neuronal development (2018)](https://doi.org/10.1002/jnr.24235)

[Ma J et al., DUSP6 in the mammalian brain (2017)](https://doi.org/10.1016/j.brainres.2017.04.012)

[Sharma P et al., DUSP6 in cancer (2020)](https://doi.org/10.7150/jca.40108)

[Kim J et al., DUSP6 in FGF signaling (2021)](https://doi.org/10.1016/j.ydbio.2021.02.004)

[Wang Y et al., DUSP6 and synaptic transmission (2020)](https://doi.org/10.1002/hipo.23152)

[Liu Q et al., DUSP6 in stress response (2021)](https://doi.org/10.1007/s10571-020-00989-9)

[Zhang L et al., MAPK phosphatases in neurons (2022)](https://doi.org/10.1016/j.pnpbp.2021.110422)

[Chen Y et al., DUSP6 in hippocampus (2019)](https://doi.org/10.1101/542181)

[Park S et al., Modulating DUSP6 in neurodegeneration (2021)](https://doi.org/10.1016/j.phrs.2021.105389)

[Wu M et al., DUSP6 in neuronal differentiation (2018)](https://doi.org/10.1007/s12035-017-0700-4)

[Singh P et al., Dual specificity phosphatases (2020)](https://doi.org/10.2174/0929867326666200428090305)

Pathway Diagram

The following diagram shows the key molecular relationships involving dusp6 discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

Pathway Diagram

The following diagram shows the key molecular relationships involving DUSP6 — Dual Specificity Phosphatase 6 (MKP3) discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

📖 View canonical wiki page →

Related Entities

DUSP6

▸Metadataorigin_type: v1_polymorphic_backfill

slug	genes-dusp6
kg_node_id	DUSP6
entity_type	gene
origin_type	v1_polymorphic_backfill
source_table	wiki_pages
wiki_page_id	wp-064a165e8b0e
__merged_from	{'merged_at': '2026-05-13', 'unprefixed_id': 'genes-dusp6'}
_schema_version	1

📊 Evidence Profile

Evidence Balance

+0%

Certainty

25%

Debates

0

Incoming

5

Outgoing

25

0 supporting 0 contradicting 0 neutral

View full evidence profile →

Public annotations (0)Annotate on Hypothes.is →

No public annotations yet.

📗 Cite This Artifact

DUSP6 — Dual Specificity Phosphatase 6 (MKP3)

DUSP6 — Dual Specificity Phosphatase 6 (MKP3)

Overview

DUSP6 — Dual Specificity Phosphatase 6 (MKP3)

Overview

Molecular Function

Protein Structure

Catalytic Activity

Substrate Specificity Mechanism

Biological Functions

Feedback Regulation of MAPK Signaling

FGF Signaling

Neuronal Functions

Role in Neurodegenerative Diseases

Alzheimer's Disease

Parkinson's Disease

General Neurodegeneration Mechanisms

Expression Patterns

Brain Distribution

Cellular Localization

Regulation

Therapeutic Implications

As a Therapeutic Target

Biomarker Potential

Disease Associations

Key Publications

External Links

See Also

References

Pathway Diagram

Pathway Diagram

💬 Discussion