GO:0017017 MAP kinase tyrosine/serine/threonine phosphatase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0017017 describes the catalytic activity of dual-specificity phosphatases that remove phosphate groups from both threonine/serine and tyrosine residues on MAP kinases.
• This activity is essential for terminating or modulating MAP kinase signalling, preventing excessive or prolonged pathway activation.
• Key enzymes include DUSP family members such as PYST2 (DUSP2) and DUSP4, which are implicated in leukemia and embryonic development.
• Dysregulation of MAP kinase phosphatases is linked to cancers, including acute leukemia and PTPN11-mutant leukemia.
• Studying this activity requires combining biochemical assays, phospho-specific antibodies, and CRISPR-based gene editing to dissect substrate specificity and cellular outcomes.
• EDITGENE provides knockout, point-mutation, knock-in, overexpression cell models and CRISPR library screening to accelerate functional studies of MAP kinase phosphatases.
Description
MAP kinase tyrosine/serine/threonine phosphatase activity (GO:0017017) is a molecular function that catalyzes the removal of phosphate groups from MAP kinases on both tyrosine and threonine/serine residues. This dual-specificity activity is critical for controlling the duration and amplitude of MAP kinase signalling, which regulates cell proliferation, differentiation, stress responses, and apoptosis. Researchers study this activity to understand how cells fine-tune signalling outputs and how its dysregulation contributes to diseases such as cancer and developmental disorders. The enzymes responsible, including members of the DUSP family, are attractive targets for therapeutic intervention and for dissecting pathway crosstalk.
MAP kinase tyrosine/serine/threonine phosphatase activity At A Glance
| GO ID | GO:0017017 |
|---|---|
| GO term | MAP kinase tyrosine/serine/threonine phosphatase activity |
| Ontology | molecular_function |
| Synonym | dual-specificity MAP kinase phosphatase activity |
| Definition | Catalysis of the reaction: MAP kinase serine/threonine/tyrosine phosphate + H2O = MAP kinase serine/threonine/tyrosine + phosphate. |
| Major function | Dephosphorylation and inactivation of MAP kinases |
| Representative enzymes | DUSP family phosphatases (e.g., DUSP2/PYST2, DUSP4) |
| Cellular context | Cytoplasm and nucleus, where MAP kinases localize |
What Is GO:0017017?
This GO term describes the catalysis of the reaction: MAP kinase serine/threonine/tyrosine phosphate + H2O = MAP kinase serine/threonine/tyrosine + phosphate. In other words, it is the enzymatic activity that removes phosphate groups from both tyrosine and serine/threonine residues on MAP kinases, a property known as dual-specificity phosphatase activity.
Why Is MAP kinase tyrosine/serine/threonine phosphatase activity Important in Cell Biology?
This activity is a key negative regulator of MAP kinase signalling, which is one of the most frequently dysregulated pathways in human diseases. By dephosphorylating MAP kinases, these phosphatases set the threshold for pathway activation and prevent uncontrolled signalling that can lead to cancer, inflammatory diseases, and developmental defects. Understanding GO:0017017 is therefore essential for interpreting signalling dynamics and for designing therapies that target MAP kinase pathways.
• Controls the duration and intensity of MAP kinase signalling, influencing cell fate decisions.
• Dysregulation is associated with acute leukemia and other cancers.
• Plays a role in embryonic development, including mesendoderm formation.
• Modulates stress responses and immune signalling.
• Provides a mechanism for crosstalk between different MAP kinase pathways.
• Serves as a potential therapeutic target in PTPN11-mutant leukemia.
• Involved in osteoarthritis-related gene networks.
• Relevant to cardioprotection and ischemic preconditioning.
• Affects muscle biology and meat quality traits in livestock.
• Impacts gut health and immune responses in poultry.
What Happens During MAP kinase tyrosine/serine/threonine phosphatase activity?
Substrate recognition and binding
In simple terms: The phosphatase enzyme finds and grabs onto its target, the MAP kinase protein.
Dual-specificity MAP kinase phosphatases (MKPs) recognize MAP kinases through specific docking interactions, often involving a kinase interaction motif (KIM) in the phosphatase and a common docking (CD) domain in the MAP kinase. This binding ensures specificity and allows the phosphatase to access the phosphothreonine and phosphotyrosine residues in the activation loop of the MAP kinase.
Catalytic dephosphorylation
In simple terms: The enzyme cuts off the phosphate groups from the MAP kinase, turning it off.
The catalytic domain of the MKP contains a conserved cysteine residue that performs a nucleophilic attack on the phosphate group, forming a covalent thiol-phosphate intermediate. Hydrolysis releases the phosphate and regenerates the enzyme. MKPs can remove phosphate from both threonine/serine and tyrosine residues, a hallmark of dual-specificity phosphatases.
Inactivation of MAP kinase
In simple terms: Once the phosphates are removed, the MAP kinase can no longer send signals.
Dephosphorylation of the activation loop threonine and tyrosine residues inactivates the MAP kinase, preventing it from phosphorylating downstream substrates. This termination is crucial for resetting the signalling pathway and avoiding sustained activation that could lead to oncogenic transformation.
Subcellular localization and regulation
In simple terms: The phosphatase can be in different parts of the cell, and its location affects what it can do.
MKPs are found in both the cytoplasm and nucleus, and their subcellular localization is regulated by sequences that control nuclear import and export. For example, some MKPs shuttle between compartments in response to signalling events, allowing them to target specific pools of MAP kinases.
Key Genes Involved in GO:0017017 MAP kinase tyrosine/serine/threonine phosphatase activity
The following genes encode proteins with MAP kinase tyrosine/serine/threonine phosphatase activity or are closely associated with this function.
| Gene | Major Role | Research Relevance |
|---|---|---|
| DUSP1 | Dephosphorylates MAP kinases (ERK, JNK, p38) | Stress response, cancer, inflammation |
| DUSP2 (PYST2) | Dual-specificity phosphatase for ERK | Overexpressed in acute leukemia |
| DUSP4 | Regulates ERK and JNK | Embryonic development, cancer |
| DUSP5 | Nuclear ERK-specific phosphatase | Cell proliferation, cancer |
| DUSP6 | Cytoplasmic ERK-specific phosphatase | Development, cancer |
| DUSP7 | ERK and p38 phosphatase | Cell cycle regulation |
| DUSP8 | JNK and p38 phosphatase | Stress signalling |
| DUSP9 | ERK, JNK, p38 phosphatase | Metabolism, cancer |
| DUSP10 | JNK and p38 phosphatase | Inflammation, immunity |
| DUSP16 | JNK and p38 phosphatase | Immune responses |
| PTPN11 (SHP2) | Tyrosine phosphatase, modulates MAPK | Leukemia, Noonan syndrome |
| TNK2 (ACK1) | Tyrosine kinase, interacts with MAPK | Synthetic lethality in PTPN11-mutant leukemia |
| MAPK1 (ERK2) | Substrate of MKPs | Proliferation, differentiation |
| MAPK3 (ERK1) | Substrate of MKPs | Proliferation, differentiation |
| MAPK8 (JNK1) | Substrate of MKPs | Stress response, apoptosis |
| MAPK14 (p38α) | Substrate of MKPs | Inflammation, stress response |
How Is MAP kinase tyrosine/serine/threonine phosphatase activity Regulated?
MAP kinase tyrosine/serine/threonine phosphatase activity is regulated at multiple levels. Transcription of DUSP genes is often induced by the same MAP kinase pathways they dephosphorylate, creating a negative feedback loop. Post-translational modifications, such as phosphorylation and ubiquitination, can affect phosphatase stability and activity. Subcellular localization also controls access to substrates; for example, nuclear localization of DUSP5 allows it to target nuclear ERK. Additionally, interactions with scaffold proteins and other signalling molecules can modulate phosphatase specificity and function.
MAP kinase tyrosine/serine/threonine phosphatase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| DUSP2 (PYST2) | Acute leukemia | Knockout or overexpression in leukemia cell lines |
| PTPN11 | PTPN11-mutant leukemia | Point mutation knock-in in hematopoietic cells |
| DUSP4 | Embryonic development | Knockout zebrafish or mouse models |
| DUSP1 | Inflammation and cancer | Conditional knockout mice |
| DUSP6 | Cancer and development | Overexpression in cancer cell lines |
Acute leukemia
Overexpression of the dual-specificity MAPK phosphatase PYST2 (DUSP2) has been observed in acute leukemia, suggesting a role in leukemogenesis. In PTPN11-mutant leukemia, inhibition of TNK2 shows synthetic lethality, highlighting the importance of MAPK phosphatase pathways in this disease.
Developmental disorders
Dusp4, a MAP kinase phosphatase, is regulated by Nodal signalling and inhibits mesendoderm formation during zebrafish gastrulation, indicating a critical role in embryonic development. Dysregulation of such phosphatases could contribute to developmental abnormalities.
Osteoarthritis
A competing endogenous RNA network analysis for osteoarthritis identified MAP kinase phosphatase-related genes as potential contributors to disease pathogenesis.
Cardioprotection
Bioinformatics analysis of dexmedetomidine-induced cardioprotection in rat heart identified MAP kinase phosphatase pathways as candidate mediators of protection against ischemia-reperfusion injury.
From MAP kinase tyrosine/serine/threonine phosphatase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of DUSP2 affect leukemia cell proliferation? | DUSP2 knockout in leukemia cell lines |
| How does a specific PTPN11 mutation alter MAPK signalling? | Point mutation knock-in in HEK293 or hematopoietic cells |
| What is the effect of DUSP4 overexpression on embryonic development? | DUSP4 overexpression in zebrafish embryos |
| Can a tagged DUSP1 reveal its interaction partners? | Knock-in of FLAG-tagged DUSP1 in mammalian cells |
| Does DUSP6 depletion sensitize cancer cells to chemotherapy? | DUSP6 knockout in cancer cell lines |
| What genes are essential for MAPK phosphatase-mediated drug resistance? | CRISPR library screening in resistant cell lines |
How to Study the MAP kinase tyrosine/serine/threonine phosphatase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| In vitro phosphatase assay | Catalytic release of phosphate | Enzyme kinetics and substrate specificity |
| Phospho-specific Western blot | Phosphorylation status of MAP kinases | Signalling pathway activation |
| CRISPR knockout screen | Gene essentiality and synthetic lethality | Identifying modifiers of MAPK signalling |
| RNA-seq | Transcriptional changes | Pathway analysis after phosphatase perturbation |
| Proteomics | Protein abundance and modifications | Global effects on signalling networks |
| Immunofluorescence | Subcellular localization | Nuclear vs cytoplasmic distribution of phosphatases |
| Co-immunoprecipitation | Protein-protein interactions | Identifying MAP kinase substrates and partners |
Phosphatase activity assays
In vitro phosphatase assays using recombinant MAP kinases and phosphatases can directly measure the catalytic activity of GO:0017017. These assays often use phospho-specific substrates and detect released phosphate.
Phospho-specific Western blotting
Western blots with antibodies against phosphorylated MAP kinase residues (e.g., phospho-ERK Thr202/Tyr204) are widely used to assess the impact of phosphatase expression or inhibition on MAPK activation status.
CRISPR-based genetic screens
Genome-wide CRISPR knockout or activation screens can identify genes that modulate MAPK phosphatase activity or compensate for its loss, revealing synthetic lethal interactions.
Transcriptomics and proteomics
RNA-seq and mass spectrometry-based proteomics can uncover changes in gene expression and protein phosphorylation networks upon manipulation of MAP kinase phosphatases, providing systems-level insights.
How CRISPR Can Be Used to Study GO:0017017 MAP kinase tyrosine/serine/threonine phosphatase activity
Knockout
CRISPR knockout of MAP kinase phosphatase genes (e.g., DUSP1, DUSP2) can abolish their activity, leading to hyperactivation of MAP kinases. This approach is useful for studying the consequences of losing negative feedback and for identifying compensatory pathways.
Point Mutation
Introducing point mutations in the catalytic cysteine of MAP kinase phosphatases (e.g., DUSP2 Cys-to-Ser) can create catalytically dead enzymes, allowing researchers to separate catalytic activity from scaffolding functions.
Knock-in
Knock-in of epitope tags (e.g., FLAG, HA) or fluorescent proteins into endogenous MAP kinase phosphatase loci enables real-time tracking of protein localization and interaction without overexpression artifacts.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression of MAP kinase phosphatases can suppress MAPK signalling, mimicking conditions of phosphatase upregulation observed in diseases like leukemia.
How EDITGENE Supports MAP kinase tyrosine/serine/threonine phosphatase activity Research
Researchers studying MAP kinase tyrosine/serine/threonine phosphatase activity-related genes often need to determine whether a candidate gene is causally involved in a specific signalling outcome or disease phenotype. EDITGENE provides a comprehensive suite of CRISPR-based services to enable such functional studies with precision and reproducibility.
Contact EDITGENE today to design your custom CRISPR model for MAP kinase tyrosine/serine/threonine phosphatase activity research.
Frequently Asked Questions About MAP kinase tyrosine/serine/threonine phosphatase activity
What is MAP kinase tyrosine/serine/threonine phosphatase activity?
It is the enzymatic activity that removes phosphate groups from both tyrosine and serine/threonine residues on MAP kinases, thereby inactivating them.
What genes are involved in MAP kinase tyrosine/serine/threonine phosphatase activity?
Genes include DUSP family members such as DUSP1, DUSP2 (PYST2), DUSP4, DUSP5, DUSP6, and others, as well as PTPN11.
What is the GO ID for MAP kinase tyrosine/serine/threonine phosphatase activity?
The GO ID is GO:0017017.
How does MAP kinase phosphatase activity affect cancer?
Dysregulation can lead to sustained MAPK signalling, contributing to leukemia and other cancers; for example, PYST2 overexpression is seen in acute leukemia.
What diseases are associated with MAP kinase phosphatases?
Acute leukemia, developmental disorders, osteoarthritis, and cardiovascular conditions have been linked to altered MAP kinase phosphatase activity.
What are the synonyms for GO:0017017?
The synonym is dual-specificity MAP kinase phosphatase activity.
How can I study MAP kinase phosphatase activity in the lab?
Common methods include in vitro phosphatase assays, phospho-specific Western blots, and CRISPR-based genetic screens.
What model systems are used to study MAP kinase phosphatases?
Cell lines, zebrafish, and mouse models are commonly used, with CRISPR knockout or overexpression.
What is the role of DUSP4 in development?
DUSP4 inhibits mesendoderm formation during zebrafish gastrulation.
Can CRISPR be used to study MAP kinase phosphatases?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression are powerful approaches to dissect gene function.
Conclusion
MAP kinase tyrosine/serine/threonine phosphatase activity (GO:0017017) is a fundamental regulatory mechanism that controls the duration and strength of MAP kinase signalling. Its dysregulation is implicated in leukemia, developmental defects, and other diseases, making it a key area of research. By leveraging CRISPR-based models and multi-omics approaches, researchers can uncover new insights into this activity and its therapeutic potential.
References
- 1. Jenkins C et al.. 2018. Synthetic lethality of TNK2 inhibition in PTPN11-mutant leukemia.. Sci Signal 11(539) PMID: 30018082
- 2. Hua SL et al.. 2022. Constructing a competing endogenous RNA network for osteoarthritis.. Ann Transl Med 10(3):147 PMID: 35284549
- 3. Martín H et al.. 2005. Protein phosphatases in MAPK signalling: we keep learning from yeast.. Mol Microbiol 58(1):6-16 PMID: 16164545
- 4. Sun Y et al.. 2023. Comparative transcriptome and proteome analyses of the longissimus dorsi muscle for explaining the difference between donkey meat and other meats.. Anim Biotechnol 34(7):3085-3098 PMID: 36271875
- 5. Zhao Y et al.. 2021. Analysis of miRNA Expression in the Ileum of Broiler Chickens During Bacillus licheniformis H2 Supplementation Against Subclinical Necrotic Enteritis.. Probiotics Antimicrob Proteins 13(2):356-366 PMID: 32975724
- 6. Yoshikawa Y et al.. 2019. Identification of Candidate Genes and Pathways in Dexmedetomidine-Induced Cardioprotection in the Rat Heart by Bioinformatics Analysis.. Int J Mol Sci 20(7) PMID: 30939728
- 7. Levy-Nissenbaum O et al.. 2003. Overexpression of the dual-specificity MAPK phosphatase PYST2 in acute leukemia.. Cancer Lett 199(2):185-92 PMID: 12969791
- 8. Liu ZT et al.. 2012. [The Nodal regulated dusp4 inhibits mesendoderm formation during zebrafish gastrulation].. Yi Chuan 34(9):1153-8 PMID: 23017456
