GO:0097533 cellular stress response to acid chemical: Cellular Defense Mechanisms, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0097533 describes how a cell changes its state or activity in response to the anion portion of a dissociated acid, not to protons.
• Acid stress triggers coordinated changes in gene expression, enzyme production, secretion, and movement to restore cellular homeostasis.
• Microbes use amino acid decarboxylation, proton pumps, and biofilm formation to survive acid stress, offering a model for conserved stress pathways.
• In mammalian cells, acid chemical stress intersects with translational control, oxidative stress, and inflammatory signaling.
• Key genes include those encoding decarboxylases, chaperones, proton transporters, and metabolic enzymes such as MPST and TAGLN2.
• CRISPR knockout, point mutation, knock-in, and overexpression models enable causal dissection of acid stress response genes.
Description
Cellular stress response to acid chemical (GO:0097533) is a biological process in which a cell alters its state or activity in response to a disturbance in homeostasis caused by the chemical structure of the anion portion of a dissociated acid, rather than by the acid acting as a proton donor. This distinction is critical because it separates anion-specific effects from general proton-mediated acidification. The term encompasses changes in movement, secretion, enzyme production, and gene expression that help the cell cope with acid chemical stress. Researchers study this process to understand how organisms from bacteria to humans survive acidic environments, and to identify vulnerabilities that can be exploited therapeutically. Acid stress responses are relevant to infectious disease, inflammatory bowel disease, cancer metabolism, and industrial biotechnology.
cellular stress response to acid chemical At A Glance
| GO ID | GO:0097533 |
|---|---|
| GO term | cellular stress response to acid chemical |
| Ontology | biological_process |
| Synonym | cellular response to acid stress; cellular stress response to acid |
| Definition | Any process that results in a change in state or activity of a cell as a result of a disturbance in cellular homeostasis caused by the chemical structure of the anion portion of a dissociated acid, rather than the acid acting as a proton donor. |
| Major function | Restoration of cellular homeostasis under acid chemical stress through changes in gene expression, enzyme production, secretion, and movement. |
| Taxonomic range | Bacteria, archaea, and eukaryotes, including human cells. |
| Related processes | Acid stress response, oxidative stress response, translational control, metabolic reprogramming. |
What Is GO:0097533?
GO:0097533 is defined as any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a disturbance in cellular homeostasis caused by the chemical structure of the anion portion of a dissociated acid, rather than the acid acting as a proton donor. The acid chemical may be in gaseous, liquid, or solid form. Synonyms include cellular response to acid stress and cellular stress response to acid.
Why Is cellular stress response to acid chemical Important in Cell Biology?
Understanding GO:0097533 is essential because acid chemical stress is a universal challenge for cells, and the anion-specific component can drive distinct adaptive programs that influence survival, virulence, and disease progression. In microbial pathogens, acid stress responses determine the ability to survive stomach acid and cause infection. In human cells, acid chemical stress contributes to inflammatory bowel disease, cancer metabolism, and cellular damage. The process also has industrial relevance, as acid stress limits microbial production of organic acids and biofuels. Studying this term helps researchers identify therapeutic targets and engineer robust cell factories.
• Acid stress response is critical for microbial survival in acidic environments such as the stomach and fermented foods.
• Anion-specific effects can modulate enzyme activity and gene expression independently of pH.
• Dysregulated acid stress responses are linked to inflammatory bowel disease and intestinal epithelial apoptosis.
• Acid chemical stress intersects with lipid metabolism and antitumour immunity in T cells.
• Understanding acid stress aids in engineering microbes for organic acid production.
• Acid stress response pathways are conserved from bacteria to humans, enabling model organism studies.
• CRISPR screening can identify genes required for acid stress survival.
• Acid stress can trigger translational reprogramming through eIF2α phosphorylation.
• Protein arginine phosphorylation is emerging as a regulatory modification in stress responses.
• Virocell metabolic reprogramming under acid stress affects host-pathogen dynamics.
What Happens During cellular stress response to acid chemical?
Anion Sensing and Signal Transduction
In simple terms: The cell detects the acid anion and turns on stress signals.
Cells sense the anion portion of dissociated acids through membrane receptors, transporters, and intracellular sensors that detect changes in anion concentration or chemical structure. This sensing triggers signal transduction cascades, including two-component systems in bacteria and kinase pathways in eukaryotes, that lead to changes in gene expression. In E. coli, the GadE regulon responds to acid stress by activating decarboxylases and antiporters. In mammalian cells, stress kinases such as JNK and p38 can be activated by acid chemical stress.
Transcriptional Reprogramming
In simple terms: The cell changes which genes are turned on or off.
Acid chemical stress induces transcriptional changes that upregulate genes involved in pH homeostasis, chaperones, and metabolic enzymes. In bacteria, alternative sigma factors such as RpoS direct RNA polymerase to stress-responsive promoters. In mammalian cells, transcription factors like NF-κB and HIF-1α can be activated, influencing inflammatory and metabolic gene expression. These transcriptional programs help restore homeostasis and protect against damage.
Translational Control
In simple terms: The cell adjusts protein production to cope with stress.
Acid chemical stress can inhibit global translation while selectively enhancing translation of stress-response proteins. This is often mediated by phosphorylation of eIF2α, which reduces initiation of cap-dependent translation but allows translation of upstream open reading frames in stress genes such as ATF4. In E. coli, acid stress can lead to ribosome hibernation and selective translation of stress proteins. This translational reprogramming is critical for survival under acid stress.
Metabolic and Enzymatic Adjustments
In simple terms: The cell changes its metabolism and enzyme activities.
Cells respond to acid chemical stress by altering metabolic fluxes and enzyme production. For example, amino acid decarboxylases consume protons and produce amines, helping to neutralize the cytoplasm. In E. coli, the GadA/GadB glutamate decarboxylase system and the AdiA arginine decarboxylase system are key acid resistance mechanisms. In mammalian cells, enzymes such as MPST (3-mercaptopyruvate sulfurtransferase) modulate oxidative stress and apoptosis under acid stress conditions.
Membrane and Transport Changes
In simple terms: The cell modifies its membrane and pumps to maintain internal balance.
Acid chemical stress induces changes in membrane composition and activity of transporters to maintain intracellular pH and ion balance. Proton pumps such as F1F0-ATPase and antiporters like GadC exchange protons or anions across the membrane. In mammalian cells, ion channels and transporters are regulated to prevent acidification-induced damage. These membrane changes are essential for survival and are often regulated post-translationally.
Key Genes Involved in GO:0097533 cellular stress response to acid chemical
The following genes and proteins are central to the cellular stress response to acid chemical, based on experimental evidence from microbial and mammalian systems.
| Gene | Major Role | Research Relevance |
|---|---|---|
| gadA | Glutamate decarboxylase; consumes protons | Acid resistance in E. coli; model for decarboxylase-based acid stress response |
| gadB | Glutamate decarboxylase isozyme | Acid resistance; redundant with gadA |
| gadC | Glutamate/GABA antiporter | Exports GABA, imports glutamate; essential for Gad system |
| adiA | Arginine decarboxylase | Arginine-dependent acid resistance |
| rpoS | Alternative sigma factor | Master regulator of general stress response including acid stress |
| hdeA | Periplasmic chaperone | Protects periplasmic proteins from acid-induced unfolding |
| hdeB | Periplasmic chaperone | Acid stress protection in periplasm |
| atpB | F1F0-ATPase subunit | Proton pumping for pH homeostasis |
| MPST | 3-mercaptopyruvate sulfurtransferase | Regulates oxidative stress and apoptosis in intestinal epithelial cells |
| TAGLN2 | Transgelin 2 | Guards T cell lipid metabolism and antitumour function under stress |
| eIF2α | Translation initiation factor | Phosphorylation inhibits global translation under stress |
| ATF4 | Transcription factor | Mediates integrated stress response; translationally upregulated |
| NF-κB | Transcription factor | Inflammatory and survival signaling under acid stress |
| HIF-1α | Hypoxia-inducible factor | Metabolic adaptation to stress |
| PrpC | Protein arginine phosphatase | Regulates stress responses via arginine phosphorylation |
| ClpP | Protease | Degrades damaged proteins under stress |
| DnaK | Chaperone | Protein folding under acid stress |
| GroEL | Chaperonin | Protein folding under acid stress |
How Is cellular stress response to acid chemical Regulated?
The cellular stress response to acid chemical is regulated at multiple levels. In bacteria, two-component systems such as PhoPQ and OmpR/EnvZ sense acid stress and activate gene expression. The alternative sigma factor RpoS controls a large regulon of stress genes. In mammalian cells, the integrated stress response (ISR) is activated by eIF2α kinases such as GCN2 and PERK, which phosphorylate eIF2α to inhibit global translation and selectively translate ATF4. Protein arginine phosphorylation is emerging as a regulatory modification that can affect protein stability and activity during stress. Additionally, metabolic regulators such as mTOR and AMPK may modulate acid stress responses by integrating nutrient and energy signals.
cellular stress response to acid chemical and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| MPST | Inflammatory bowel disease; intestinal epithelial apoptosis | Mpst knockout mice or intestinal organoids |
| TAGLN2 | Cancer; T cell antitumour immunity | Tagln2 knockout T cells in tumour models |
| gadA/gadB | Microbial acid resistance; pathogenesis | E. coli deletion mutants in acid survival assays |
| eIF2α | Neurodegeneration; integrated stress response | Knock-in mice with phospho-deficient eIF2α |
| ATF4 | Cancer; metabolic stress adaptation | ATF4 knockout cancer cell lines |
Inflammatory Bowel Disease
Acid chemical stress in the gut can damage intestinal epithelial cells and contribute to inflammatory bowel disease (IBD). MPST deficiency promotes intestinal epithelial cell apoptosis and aggravates IBD via AKT signaling. This suggests that acid stress response pathways are critical for maintaining intestinal barrier integrity and that their dysregulation can exacerbate inflammation.
Cancer and Antitumour Immunity
Acid chemical stress in the tumour microenvironment can impair T cell function. Transgelin 2 (TAGLN2) guards T cell lipid metabolism and antitumour function, and its loss leads to metabolic stress and reduced antitumour activity. This highlights how acid stress responses in immune cells can influence cancer progression and immunotherapy outcomes.
Microbial Pathogenesis
Pathogenic bacteria must survive acid stress in the stomach to cause infection. Their acid resistance mechanisms, including decarboxylases and proton pumps, are essential for virulence. Understanding these responses can inform the development of new antimicrobial strategies.
From cellular stress response to acid chemical-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X confer acid resistance? | CRISPR knockout in E. coli or mammalian cells followed by acid challenge |
| Does a specific point mutation in gene Y alter acid stress signaling? | CRISPR point mutation knock-in |
| Does overexpression of gene Z protect against acid stress? | CRISPR overexpression or lentiviral overexpression |
| What is the localization of protein W under acid stress? | Tagged knock-in with fluorescent protein |
| Which genes are essential for acid stress survival? | Genome-wide CRISPR library screening |
| How does acid stress affect translation? | Ribo-seq or polysome profiling |
How to Study the cellular stress response to acid chemical Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Global gene expression changes | Identify acid stress regulons |
| Ribo-seq | Translation efficiency and ribosome occupancy | Study translational control under acid stress |
| Proteomics | Protein abundance and modifications | Discover stress-induced proteins and PTMs |
| CRISPR knockout screening | Gene essentiality under acid stress | Identify novel acid resistance genes |
| Reporter assays | Promoter activity or protein stability | Validate stress-responsive promoters |
| Acid survival assays | Cell viability at low pH | Compare wild-type and mutant strains |
| Metabolomics | Metabolite levels | Measure decarboxylase products and metabolic shifts |
| Imaging | Protein localization and cell morphology | Visualize stress granule formation or membrane changes |
Transcriptomics and RNA-seq
RNA-seq can identify global transcriptional changes in response to acid chemical stress. In bacteria, this reveals regulons controlled by RpoS and other stress sigma factors. In mammalian cells, it highlights inflammatory and metabolic pathways. Comparing wild-type and knockout cells can pinpoint genes directly regulated by specific factors.
Proteomics and Post-translational Modifications
Mass spectrometry-based proteomics can quantify protein abundance and modifications such as phosphorylation and arginine phosphorylation under acid stress. This helps identify signaling events and damaged proteins. In E. coli, proteomics has revealed chaperone induction and metabolic enzyme changes.
Ribo-seq and Translational Profiling
Ribo-seq measures ribosome occupancy and translation efficiency, revealing selective translation of stress response genes such as ATF4 under acid stress. This method is powerful for studying translational control mechanisms.
CRISPR Screening
Genome-wide CRISPR knockout or activation screens can identify genes required for survival under acid chemical stress. These screens have been used in bacteria and mammalian cells to uncover novel acid resistance factors. Hits can be validated with individual knockouts.
How CRISPR Can Be Used to Study GO:0097533 cellular stress response to acid chemical
Knockout
CRISPR knockout is used to delete genes suspected to be involved in acid stress response, such as gadA, gadB, or MPST, to test their requirement for survival under acid chemical stress. Knockout cell lines or bacterial strains can be challenged with acid and compared to wild-type for viability, gene expression, and metabolic changes.
Point Mutation
Point mutations can be introduced to mimic or abolish phosphorylation sites, catalytic residues, or regulatory modifications in acid stress response genes. For example, mutating the catalytic cysteine of MPST or the phosphorylation site of eIF2α can reveal their functional importance. CRISPR prime editing or homology-directed repair enables precise point mutations.
Knock-in
Knock-in of reporter tags (e.g., GFP, FLAG) allows visualization and immunoprecipitation of acid stress proteins at endogenous levels. Knock-in of disease-associated alleles can model human conditions related to acid stress, such as MPST variants in IBD. This approach preserves native regulation and splicing.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression can drive high-level expression of candidate protective genes to test whether they enhance acid stress resistance. Overexpression of chaperones like HdeA or metabolic enzymes like GadA can increase survival under acid challenge. This is useful for identifying gain-of-function phenotypes.
How EDITGENE Supports cellular stress response to acid chemical Research
Researchers studying cellular stress response to acid chemical-related genes often need to determine whether a candidate gene is causally involved in acid resistance, pH homeostasis, or stress signaling. EDITGENE provides comprehensive CRISPR-based services to generate precisely engineered cell models for such functional studies.
Contact EDITGENE today to design your custom CRISPR model for cellular stress response to acid chemical research.
Frequently Asked Questions About cellular stress response to acid chemical
What is GO:0097533 cellular stress response to acid chemical?
GO:0097533 is a Gene Ontology biological process term describing how a cell changes its state or activity in response to a disturbance caused by the anion portion of a dissociated acid, rather than by protons.
What genes are involved in cellular stress response to acid chemical?
Key genes include gadA, gadB, gadC, adiA, rpoS, hdeA, hdeB, atpB in bacteria, and MPST, TAGLN2, eIF2α, ATF4 in mammalian cells.
How do cells respond to acid stress?
Cells respond by altering gene expression, enzyme production, secretion, and movement to restore homeostasis, often through decarboxylases, proton pumps, and chaperones.
What is the difference between acid stress response and acid chemical stress response?
Acid stress response can include proton-mediated effects, while acid chemical stress response specifically refers to effects of the anion portion of a dissociated acid, not the proton.
Which diseases are linked to acid chemical stress response?
Inflammatory bowel disease, cancer, and microbial infections are linked to dysregulated acid stress responses.
How can I study acid stress response using CRISPR?
CRISPR knockout, point mutation, knock-in, and overexpression models allow functional dissection of acid stress genes in bacteria and mammalian cells.
What methods are used to study cellular stress response to acid chemical?
RNA-seq, Ribo-seq, proteomics, metabolomics, CRISPR screening, and acid survival assays are commonly used.
What is the role of MPST in acid stress response?
MPST deficiency promotes intestinal epithelial cell apoptosis and aggravates inflammatory bowel disease via AKT, linking it to acid stress-related pathology.
How does TAGLN2 relate to acid stress?
TAGLN2 guards T cell lipid metabolism and antitumour function, and its loss leads to metabolic stress, highlighting its role in stress responses.
What is the integrated stress response in acid chemical stress?
The integrated stress response involves eIF2α phosphorylation, which inhibits global translation and selectively translates ATF4 to help cells survive acid stress.
Conclusion
GO:0097533 cellular stress response to acid chemical is a fundamental biological process that enables cells to cope with anion-specific acid stress. From bacterial decarboxylase systems to mammalian translational control, this response is critical for survival and has broad implications for infectious disease, inflammation, and cancer. CRISPR-based models and multi-omics methods are powerful tools to dissect the underlying mechanisms and identify therapeutic targets.
References
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- 2. Guan N et al.. 2020. Microbial response to acid stress: mechanisms and applications.. Appl Microbiol Biotechnol 104(1):51-65 PMID: 31773206
- 3. Atasoy M et al.. 2024. Methods for studying microbial acid stress responses: from molecules to populations.. FEMS Microbiol Rev 48(5) PMID: 38760882
- 4. Zhang J et al.. 2022. MPST deficiency promotes intestinal epithelial cell apoptosis and aggravates inflammatory bowel disease via AKT.. Redox Biol 56:102469 PMID: 36126419
- 5. Sawant N et al.. 2022. Overview of the Cellular Stress Responses Involved in Fatty Acid Overproduction in E. coli.. Mol Biotechnol 64(4):373-387 PMID: 34796451
- 6. Howard-Varona C et al.. 2024. Environment-specific virocell metabolic reprogramming.. ISME J 18(1) PMID: 38552150
- 7. Huang B et al.. 2021. Protein arginine phosphorylation in organisms.. Int J Biol Macromol 171:414-422 PMID: 33428953
- 8. Brostrom CO et al.. 1998. Regulation of translational initiation during cellular responses to stress.. Prog Nucleic Acid Res Mol Biol 58:79-125 PMID: 9308364
