GO:0051403 stress-activated MAPK cascade: Signaling Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0051403 stress-activated MAPK cascade is a biological process that begins with activation of stress-activated MAP kinases, primarily p38 and JNK, in response to environmental stressors.
• The cascade is evolutionarily conserved from yeast to humans and controls cell survival, apoptosis, differentiation, and cytokinesis.
• Dysregulation of stress-activated MAPK signaling contributes to colorectal cancer, pulmonary fibrosis, intervertebral disc degeneration, and fungal pathogenicity.
• Key core components include MAP3Ks (e.g., ASK1, TAK1), MAP2Ks (MKK3/6, MKK4/7), and MAPKs (p38α/β/γ/δ, JNK1/2/3).
• CRISPR-based knockout, point mutation, knock-in, and overexpression models enable precise dissection of gene function within this cascade.
• Understanding this pathway offers therapeutic targets for inflammatory, fibrotic, and degenerative diseases.
Description
The stress-activated MAPK cascade (GO:0051403) is a conserved signaling module that transduces environmental and intracellular stressors into cellular responses. It is defined as a MAPK cascade that starts with the activation of a stress-activated MAP kinase cascade, encompassing the p38 and JNK families of mitogen-activated protein kinases. This pathway is distinct from classical growth factor-stimulated MAPK cascades and is typically triggered by UV radiation, oxidative stress, inflammatory cytokines, and osmotic shock. Research into this cascade has revealed its central roles in cell fate decisions, including apoptosis, survival, and differentiation, making it a focal point for understanding disease mechanisms. In colorectal cancer, dysregulated MAPK signaling, including stress-activated branches, influences tumor progression and therapeutic resistance. Similarly, in pulmonary fibrosis, stress-activated protein kinases modulate fibrotic remodeling and inflammation. The evolutionary conservation of this cascade is underscored by studies in fission yeast, where stress-activated MAPK signaling controls cytokinesis and actomyosin ring integrity. These findings highlight the broad biological significance of GO:0051403 and its potential as a target for therapeutic intervention.
stress-activated MAPK cascade At A Glance
| GO ID | GO:0051403 |
|---|---|
| GO term | stress-activated MAPK cascade |
| Ontology | biological_process |
| Synonym | MAPK11 cascade; MAPK12 cascade; MAPK13 cascade; MAPK14 cascade; SAPK cascade; stress-activated MAPKKK cascade; stress-activated MAPKKK signaling pathway; stress-activated MAPKKK signalling pathway; stress-activated MAPK signaling pathway; stress-activated MAPK signalling pathway |
| Major function | Transduces stress signals into cellular responses including apoptosis, survival, differentiation, and cytokinesis |
| Key kinases | MAP3Ks (ASK1, TAK1, MLK), MAP2Ks (MKK3/6, MKK4/7), MAPKs (p38α/β/γ/δ, JNK1/2/3) |
| Upstream activators | Environmental stressors (UV, oxidative stress, osmotic shock), inflammatory cytokines (TNF-α, IL-1) |
| Downstream targets | Transcription factors (ATF2, c-Jun, p53), cytoskeletal regulators (formin For3) |
| Disease relevance | Colorectal cancer, pulmonary fibrosis, intervertebral disc degeneration, fungal infections |
What Is GO:0051403?
GO:0051403 stress-activated MAPK cascade is a biological process defined as a MAPK cascade that starts with the activation of a stress-activated MAP kinase cascade. In simpler terms, it is a sequential series of protein phosphorylation events triggered by cellular stress, leading to the activation of stress-activated MAP kinases such as p38 and JNK, which then phosphorylate downstream targets to elicit adaptive or apoptotic responses.
Why Is stress-activated MAPK cascade Important in Cell Biology?
The stress-activated MAPK cascade is critically important because it serves as a central hub for cellular stress responses, influencing decisions between cell survival and death. Its dysregulation is implicated in a wide range of human pathologies, including cancer, fibrosis, and degenerative diseases, making it a prime target for therapeutic development. Moreover, its evolutionary conservation allows researchers to use model organisms such as fission yeast to uncover fundamental mechanisms that translate to human biology.
• Controls apoptosis and survival in response to cellular stress.
• Regulates inflammatory cytokine production and immune responses.
• Implicated in colorectal cancer progression and chemoresistance.
• Plays a key role in pulmonary fibrosis pathogenesis.
• Contributes to intervertebral disc degeneration via JNK and p38 MAPK.
• Essential for cytokinesis and actomyosin ring integrity in fission yeast.
• Modulates fungal pathogenicity and adaptation to host environments.
• Provides targets for anti-inflammatory and anti-fibrotic therapies.
• Serves as a paradigm for understanding MAPK signaling specificity.
• Enables CRISPR-based functional genomics studies of stress response networks.
What Happens During stress-activated MAPK cascade?
Stress Sensing and MAP3K Activation
In simple terms: The cell detects stress and turns on the first kinase in the chain.
The cascade is initiated when environmental stressors such as UV radiation, oxidative stress, or inflammatory cytokines trigger activation of MAP3Ks (e.g., ASK1, TAK1, MLK3). These upstream kinases are often activated through post-translational modifications or interaction with adaptor proteins. In fission yeast, stress-activated MAPK signaling is modulated by host plant phenolic acids, which cause cytoplasmic sequestration of the MAPK. This step represents the entry point of the cascade and is subject to tight regulation.
MAP2K Activation and Signal Amplification
In simple terms: The signal is passed to the next kinases, which amplify it.
Activated MAP3Ks phosphorylate and activate MAP2Ks, primarily MKK3/6 for p38 and MKK4/7 for JNK. These dual-specificity kinases then phosphorylate MAPKs on both threonine and tyrosine residues, leading to full activation. This step ensures signal amplification and integration from multiple upstream inputs.
MAPK Activation and Substrate Phosphorylation
In simple terms: The final kinases in the chain get activated and modify target proteins.
Activated p38 and JNK MAPKs phosphorylate downstream substrates, including transcription factors (ATF2, c-Jun, p53), cytoskeletal proteins, and other regulatory molecules. This leads to changes in gene expression, cell cycle progression, and cytoskeletal dynamics. For example, in fission yeast, stress-activated MAPK signaling controls actomyosin ring integrity by modulating formin For3 levels.
Cellular Responses and Feedback Regulation
In simple terms: The cell responds to the stress and the pathway is tuned down.
The ultimate outcomes of the cascade include apoptosis, survival, differentiation, or cytokinesis, depending on cell type and context. Negative feedback mechanisms, such as MAPK phosphatases and protein degradation, ensure transient signaling. In cytokinesis, stress-activated MAPK signaling negatively controls the process to prevent premature ring assembly. Dysregulation of these feedback loops can lead to pathological states.
Key Genes Involved in GO:0051403 stress-activated MAPK cascade
The following genes encode core components and regulators of the stress-activated MAPK cascade, with representative roles and research relevance.
| Gene | Major Role | Research Relevance |
|---|---|---|
| MAPK14 (p38α) | Stress-activated MAPK; phosphorylates downstream substrates | Central to inflammation, apoptosis, and cancer |
| MAPK11 (p38β) | Stress-activated MAPK; similar to p38α | Implicated in cardiac and neuronal stress responses |
| MAPK12 (p38γ) | Stress-activated MAPK; involved in differentiation | Role in muscle and cancer |
| MAPK13 (p38δ) | Stress-activated MAPK; regulates secretion | Implicated in skin and pancreatic diseases |
| MAPK8 (JNK1) | Stress-activated MAPK; regulates apoptosis | Key in neurodegeneration and cancer |
| MAPK9 (JNK2) | Stress-activated MAPK; regulates proliferation | Implicated in cancer and fibrosis |
| MAPK10 (JNK3) | Stress-activated MAPK; neuronal-specific | Role in neurodegeneration |
| MAP2K3 (MKK3) | MAP2K; activates p38 | Target for anti-inflammatory drugs |
| MAP2K6 (MKK6) | MAP2K; activates p38 | Involved in stress responses |
| MAP2K4 (MKK4) | MAP2K; activates JNK | Tumor suppressor in some cancers |
| MAP2K7 (MKK7) | MAP2K; activates JNK | Role in apoptosis and cancer |
| MAP3K5 (ASK1) | MAP3K; activates MKK4/7 and MKK3/6 | Central to oxidative stress-induced apoptosis |
| MAP3K7 (TAK1) | MAP3K; activates MKK4/7 and MKK3/6 | Key in inflammatory signaling |
| MAP3K11 (MLK3) | MAP3K; activates JNK and p38 | Implicated in cancer and neurodegeneration |
| DUSP1 (MKP-1) | MAPK phosphatase; inactivates p38 and JNK | Negative regulator; drug target |
| ATF2 | Transcription factor; substrate of p38 and JNK | Mediates stress-induced gene expression |
| JUN (c-Jun) | Transcription factor; substrate of JNK | Key in proliferation and apoptosis |
How Is stress-activated MAPK cascade Regulated?
The stress-activated MAPK cascade is tightly regulated at multiple levels. Negative feedback is mediated by MAPK phosphatases (e.g., DUSP1) that dephosphorylate p38 and JNK. Scaffold proteins such as JIP1 and KSR organize the kinase modules to ensure signaling specificity. In fission yeast, stress-activated MAPK signaling is negatively controlled during cytokinesis to prevent premature actomyosin ring assembly. Additionally, cytoplasmic sequestration of MAPK by host plant phenolic acids represents a regulatory mechanism in fungal pathogens. Cross-talk with other pathways, including the classical ERK cascade, further modulates the output.
stress-activated MAPK cascade and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| MAPK14 | Colorectal cancer, pulmonary fibrosis | Knockout and point-mutation cell lines; xenograft models |
| MAPK8 | Intervertebral disc degeneration, neurodegeneration | Knockout mice; primary disc cells |
| MAP2K4 | Colorectal cancer (tumor suppressor) | Knockout and knock-in models |
| MAP3K5 | Oxidative stress-related diseases | Overexpression and knockout cell lines |
| DUSP1 | Inflammatory diseases, cancer | Overexpression and knockout models |
Colorectal Cancer
Dysregulated MAPK signaling, including stress-activated branches, is frequently observed in colorectal cancer. The p38 and JNK pathways can promote tumor progression or apoptosis depending on context, and their modulation influences chemoresistance. Targeting these kinases is being explored as a therapeutic strategy.
Pulmonary Fibrosis
Stress-activated protein kinases, particularly p38 and JNK, play pathophysiological roles in pulmonary fibrosis by promoting fibroblast proliferation and extracellular matrix deposition. Inhibition of these kinases reduces fibrotic remodeling in preclinical models.
Intervertebral Disc Degeneration
JNK and p38 MAPK are activated in intervertebral disc degeneration, contributing to matrix degradation, inflammation, and cell death. Targeting these pathways may slow degeneration and alleviate pain.
Fungal Pathogenesis
Stress-activated MAPK signaling is essential for human fungal pathogens to adapt to host environments and cause disease. In plant pathogens, host phenolic acids can sequester the MAPK to attenuate virulence. Understanding these mechanisms may lead to novel antifungal strategies.
From stress-activated MAPK cascade-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of MAPK14 affect stress-induced apoptosis? | CRISPR knockout of MAPK14 in HeLa or HEK293 cells |
| Does a specific phosphorylation site on p38 regulate substrate specificity? | Point mutation (e.g., T180A/Y182F) knock-in |
| How does a disease-associated mutation in MAP2K4 alter signaling? | Knock-in of mutant allele in colorectal cancer cell lines |
| Where is p38 localized during stress? | Tagged knock-in (e.g., GFP-p38) for live imaging |
| Does overexpression of DUSP1 suppress JNK activation? | Overexpression of DUSP1 in stress-treated cells |
| What genes are essential for stress-activated MAPK cascade? | Genome-wide CRISPR library screening |
How to Study the stress-activated MAPK cascade Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Phosphoproteomics | Global phosphorylation changes | Identify substrates of p38/JNK |
| RNA-seq | Transcriptional profiles | Measure downstream gene expression |
| Live-cell imaging | Protein localization and dynamics | Visualize MAPK translocation |
| CRISPR screening | Gene essentiality and modifiers | Discover regulators of the cascade |
| Western blotting | Protein expression and phosphorylation | Validate activation status |
| Immunoprecipitation | Protein-protein interactions | Identify complex components |
| Kinase activity assay | Enzymatic activity | Measure MAPK activity |
| Flow cytometry | Apoptosis and cell cycle | Assess cellular outcomes |
Phosphoproteomics
Phosphoproteomics enables global identification of substrates and activation loop phosphorylation events in the stress-activated MAPK cascade. By comparing stressed versus unstressed cells, researchers can map dynamic phosphorylation changes.
RNA Sequencing (RNA-seq)
RNA-seq measures transcriptional changes downstream of stress-activated MAPK activation, revealing target genes and pathways. It is often used after knockout or overexpression of cascade components.
Live-Cell Imaging
Live-cell imaging with fluorescently tagged MAPKs or substrates allows real-time visualization of cascade dynamics, including nuclear translocation and cytoskeletal regulation.
CRISPR Screening
Genome-wide CRISPR knockout or activation screens can identify genes that modulate stress-activated MAPK signaling, uncovering novel regulators and therapeutic targets.
How CRISPR Can Be Used to Study GO:0051403 stress-activated MAPK cascade
Knockout
CRISPR knockout of core cascade genes (e.g., MAPK14, MAPK8) ablates signaling and reveals their requirement for stress responses. This approach is used to study loss-of-function phenotypes in cancer and fibrosis models.
Point Mutation
Point mutations can be introduced to mimic or abolish phosphorylation sites (e.g., T180A/Y182F in p38), enabling precise dissection of activation mechanisms and substrate specificity.
Knock-in
Knock-in of disease-associated mutations or tagged alleles (e.g., GFP-p38) allows tracking of protein localization and function in live cells, as well as modeling of human genetic variants.
Overexpression
Overexpression of wild-type or constitutively active kinases (e.g., MKK6EE) or phosphatases (e.g., DUSP1) can amplify or suppress the cascade, facilitating gain-of-function studies.
How EDITGENE Supports stress-activated MAPK cascade Research
Researchers studying stress-activated MAPK cascade-related genes often need to determine whether a candidate gene is causally involved in stress responses, disease progression, or drug resistance. EDITGENE provides a comprehensive suite of CRISPR-based services to accelerate this functional validation.
Contact EDITGENE today to design your custom CRISPR model for stress-activated MAPK cascade research.
Related Products
| Product name | Cat.No. | Species | Gene ID | |
|---|---|---|---|---|
| MAP3K7 Knockout HEK293 Cell Line | EDJ-KQ142 | Human | 6885 | Details Get a Quote |
| MAPK8 Knockout HEK293 Cell Line | EDJ-KQ193 | Human | 5599 | Details Get a Quote |
| TAOK2 Knockout HEK293 Cell Line | EDJ-KQ238 | Human | 9344 | Details Get a Quote |
| MAPK1 Knockout HEK293 Cell Line | EDJ-KQ390 | Human | 5594 | Details Get a Quote |
| MAPK3 Knockout HEK293 Cell Line | EDJ-KQ391 | Human | 5595 | Details Get a Quote |
| IKBKB Knockout HEK293 Cell Line | EDJ-KQ566 | Human | 3551 | Details Get a Quote |
| MAP2K7 Knockout HEK293 Cell Line | EDJ-KQ684 | Human | 5609 | Details Get a Quote |
| MAP3K13 Knockout HEK293 Cell Line | EDJ-KQ688 | Human | 9175 | Details Get a Quote |
| MAP3K20 Knockout HEK293 Cell Line | EDJ-KQ690 | Human | 51776 | Details Get a Quote |
| MAP3K5 Knockout HEK293 Cell Line | EDJ-KQ693 | Human | 4217 | Details Get a Quote |
| MAPK11 Knockout HEK293 Cell Line | EDJ-KQ698 | Human | 5600 | Details Get a Quote |
| MAPK13 Knockout HEK293 Cell Line | EDJ-KQ699 | Human | 5603 | Details Get a Quote |
| MAPK14 Knockout HEK293 Cell Line | EDJ-KQ700 | Human | 1432 | Details Get a Quote |
| MAP2K6 Knockout HEK293 Cell Line | EDJ-KQ1353 | Human | 5608 | Details Get a Quote |
| CDK16 Knockout HEK293 Cell Line | EDJ-KQ2177 | Human | 5127 | Details Get a Quote |
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Frequently Asked Questions About stress-activated MAPK cascade
What is the stress-activated MAPK cascade?
It is a biological process (GO:0051403) where stress signals activate a kinase cascade culminating in p38 and JNK MAPK activation, leading to cellular responses.
What genes are involved in the stress-activated MAPK cascade?
Key genes include MAPK14, MAPK8, MAP2K3, MAP2K4, MAP3K5, and DUSP1, among others.
What diseases are associated with stress-activated MAPK cascade?
Colorectal cancer, pulmonary fibrosis, intervertebral disc degeneration, and fungal infections.
How is the stress-activated MAPK cascade regulated?
It is regulated by phosphatases (e.g., DUSP1), scaffold proteins, and feedback phosphorylation.
What are the downstream targets of p38 MAPK?
Transcription factors like ATF2, c-Jun, and p53, as well as cytoskeletal proteins.
What is the difference between stress-activated and classical MAPK cascades?
Stress-activated cascades respond to stressors and activate p38/JNK, while classical cascades respond to growth factors and activate ERK.
How can I study the stress-activated MAPK cascade using CRISPR?
Use knockout, point mutation, knock-in, or overexpression models to perturb specific genes and measure downstream effects.
What model organisms are used to study stress-activated MAPK cascade?
Fission yeast, human cell lines, and mouse models are commonly used.
What are the clinical implications of targeting stress-activated MAPK cascade?
Inhibitors of p38 and JNK are being explored for inflammatory and fibrotic diseases.
How does stress-activated MAPK signaling affect cytokinesis?
In fission yeast, it negatively controls cytokinesis by modulating formin For3 levels.
Conclusion
The stress-activated MAPK cascade (GO:0051403) is a fundamental signaling pathway that orchestrates cellular responses to stress, with profound implications for human health and disease. Its core components and regulatory mechanisms are conserved across species, offering diverse research opportunities. CRISPR-based functional genomics, combined with EDITGENE's specialized services, provides a powerful approach to dissect this cascade and develop targeted therapies.
References
- 1. Fang JY et al.. 2005. The MAPK signalling pathways and colorectal cancer.. Lancet Oncol 6(5):322-7 PMID: 15863380
- 2. Madrid M et al.. 2021. Negative control of cytokinesis by stress-activated MAPK signaling.. Curr Genet 67(5):715-721 PMID: 33791858
- 3. Li L et al.. 2024. Stress-Activated Protein Kinases in Intervertebral Disc Degeneration: Unraveling the Impact of JNK and p38 MAPK.. Biomolecules 14(4) PMID: 38672411
- 4. Gómez-Gil E et al.. 2020. Stress-activated MAPK signaling controls fission yeast actomyosin ring integrity by modulating formin For3 levels.. Elife 9 PMID: 32915139
- 5. Obata T et al.. 2000. MAP kinase pathways activated by stress: the p38 MAPK pathway.. Crit Care Med 28(4 Suppl):N67-77 PMID: 10807318
- 6. Kasuya Y et al.. 2021. Pathophysiological Roles of Stress-Activated Protein Kinases in Pulmonary Fibrosis.. Int J Mol Sci 22(11) PMID: 34204949
- 7. Day AM et al.. 2019. Stress-Activated Protein Kinases in Human Fungal Pathogens.. Front Cell Infect Microbiol 9:261 PMID: 31380304
- 8. Zuchman R et al.. 2025. Cytoplasmic sequestering of a fungal stress-activated MAPK in response to a host plant phenolic acid.. PLoS Pathog 21(10):e1013620 PMID: 41166398
