GO:0004089 carbonate dehydratase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0004089 (carbonate dehydratase activity) describes the reversible hydration of carbon dioxide to bicarbonate and protons, a reaction catalyzed by carbonic anhydrases.
• Carbonic anhydrases are zinc metalloenzymes that accelerate CO2 hydration by up to 10^6-fold, making them essential for pH regulation, ion transport, and metabolic flux.
• Multiple carbonic anhydrase families exist, including alpha, beta, gamma, and others, with distinct cellular localizations such as mitochondrial carbonic anhydrase.
• Dysregulation of carbonate dehydratase activity is linked to diseases including osteopetrosis, cancer, and microbial infections.
• Small-molecule activators and inhibitors of carbonic anhydrases are actively pursued as therapeutic agents.
• CRISPR-based knockout, point mutation, and knock-in models enable precise dissection of carbonic anhydrase gene function in health and disease.
Description
Carbonate dehydratase activity (GO:0004089) is a fundamental molecular function that catalyzes the reversible conversion of carbon dioxide and water to bicarbonate and protons. This reaction is central to numerous physiological processes, including respiration, pH homeostasis, and fluid secretion. The enzymes responsible, carbonic anhydrases, are ubiquitous across all domains of life and are divided into several evolutionary distinct classes, such as alpha, beta, and gamma. In humans, carbonic anhydrases are involved in diverse functions ranging from bone resorption to neuronal signaling. Researchers study this activity to understand how cells manage metabolic waste, maintain acid-base balance, and respond to environmental changes. The importance of carbonate dehydratase activity extends to clinical contexts, where its dysregulation contributes to diseases like osteopetrosis and cancer. Moreover, microbial carbonic anhydrases are potential drug targets for infections. Given its broad relevance, precise genetic tools are needed to dissect the roles of individual carbonic anhydrase genes.
carbonate dehydratase activity At A Glance
| GO ID | GO:0004089 |
|---|---|
| GO term | carbonate dehydratase activity |
| Ontology | molecular_function |
| Synonym | anhydrase activity; carbonate anhydrase activity; carbonate hydro-lyase activity; carbonate hydro-lyase (carbon-dioxide-forming); carbonic acid anhydrase activity; carbonic anhydrase A; carbonic anhydrase activity; carbonic dehydratase activity; carboxyanhydrase activity |
| Major function | Reversible hydration of carbon dioxide to bicarbonate and protons |
| Reaction | hydrogencarbonate + H+ = CO2 + H2O |
| Cofactor | Zinc (typically) |
| Localization | Cytoplasm, mitochondria, extracellular, etc. |
| EC number | 4.2.1.1 |
What Is GO:0004089?
Carbonate dehydratase activity (GO:0004089) is defined as the catalysis of the reaction: hydrogencarbonate + H+ = CO2 + H2O. In other words, it is the reversible interconversion of carbon dioxide and bicarbonate, a process that is essential for maintaining pH and ion balance in cells. This activity is synonymous with carbonic anhydrase activity, carbonate hydro-lyase activity, and several other names.
Why Is carbonate dehydratase activity Important in Cell Biology?
Carbonate dehydratase activity is crucial for life because it regulates pH, carbon dioxide transport, and ion secretion. In humans, carbonic anhydrases are involved in bone resorption, glaucoma, epilepsy, and cancer. In microbes, these enzymes support growth and virulence, making them drug targets. Understanding this activity at the molecular level informs drug design and genetic studies.
• Maintains acid-base homeostasis in tissues and cells.
• Facilitates CO2 transport in blood and respiration.
• Supports bone resorption by osteoclasts; mutations cause osteopetrosis.
• Involved in tumorigenesis and cancer cell metabolism.
• Target for diuretics, anti-glaucoma, and anti-epileptic drugs.
• Microbial carbonic anhydrases are virulence factors and drug targets.
• Mitochondrial carbonic anhydrase participates in ureagenesis and gluconeogenesis.
• Activators can enhance synaptic efficacy and memory.
• Isoform-specific functions are studied via CRISPR models.
• Enables survival of extremophiles and pathogens.
Molecular Mechanism of carbonate dehydratase activity
Substrate Binding and Zinc Coordination
In simple terms: The enzyme uses a zinc ion to grab a water molecule and make it reactive.
Carbonic anhydrases typically contain a zinc ion coordinated by three histidine residues and a water molecule. The zinc-bound hydroxide attacks CO2, converting it to bicarbonate. This mechanism is conserved across alpha, beta, and gamma classes.
Catalytic Cycle and Proton Transfer
In simple terms: The enzyme quickly shuttles protons to regenerate the active site.
The catalytic cycle involves two steps: conversion of CO2 to bicarbonate and regeneration of the zinc-bound hydroxide via proton transfer. Proton transfer is often rate-limiting and facilitated by buffer molecules or specific residues. Some carbonic anhydrases have high catalytic rates approaching diffusion limits.
Isoform Diversity and Localization
In simple terms: Different versions of the enzyme work in different parts of the cell.
Humans have multiple carbonic anhydrase isoforms (e.g., CA I, II, III, IV, VA, VB, VI, VII, IX, XII, XIII, XIV) with distinct tissue distributions and subcellular localizations. For example, mitochondrial carbonic anhydrase (CA VA and VB) participates in ureagenesis and gluconeogenesis. Secreted CA VI is found in saliva and milk. Membrane-bound CA IV and CA IX are involved in pH regulation.
Regulation by Activators and Inhibitors
In simple terms: Small molecules can speed up or slow down the enzyme.
Carbonic anhydrase activity can be modulated by activators, which enhance catalysis, and inhibitors, such as sulfonamides, which block the active site. Activators have been proposed to enhance synaptic transmission and memory. Inhibitors are used clinically for glaucoma, edema, and epilepsy.
Bacterial and Fungal Carbonic Anhydrases
In simple terms: Microbes also use these enzymes, and they can be targeted by drugs.
Bacterial gamma-carbonic anhydrases are structurally distinct and essential for some pathogens. Fungal carbonic anhydrases, such as that from Malassezia globosa, are inhibited by plant phenols, suggesting new antifungal strategies.
Key Genes Involved in GO:0004089 carbonate dehydratase activity
The following genes encode proteins with carbonate dehydratase activity or are directly related to its function.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CA1 | Cytosolic carbonic anhydrase I | Expressed in erythrocytes; involved in CO2 transport |
| CA2 | Cytosolic carbonic anhydrase II | High activity; mutations cause osteopetrosis |
| CA3 | Cytosolic carbonic anhydrase III | Muscle-specific; antioxidant properties |
| CA4 | Membrane-bound carbonic anhydrase IV | Kidney and lung; pH regulation |
| CA5A | Mitochondrial carbonic anhydrase VA | Ureagenesis and gluconeogenesis |
| CA5B | Mitochondrial carbonic anhydrase VB | Mitochondrial metabolism |
| CA6 | Secreted carbonic anhydrase VI | Saliva and milk; taste and digestion |
| CA7 | Cytosolic carbonic anhydrase VII | Brain and salivary glands |
| CA8 | Cytosolic carbonic anhydrase VIII | Brain; may have non-catalytic functions |
| CA9 | Transmembrane carbonic anhydrase IX | Hypoxia-induced; cancer biomarker |
| CA10 | Secreted carbonic anhydrase X | Brain and kidney |
| CA11 | Secreted carbonic anhydrase XI | Brain and spinal cord |
| CA12 | Transmembrane carbonic anhydrase XII | Cancer and pH regulation |
| CA13 | Cytosolic carbonic anhydrase XIII | Widely expressed; catalytic activity |
| CA14 | Transmembrane carbonic anhydrase XIV | Brain and kidney |
| MGC1 | Beta-carbonic anhydrase in M. globosa | Fungal virulence; drug target |
| CynT | Gamma-carbonic anhydrase in bacteria | Bacterial metabolism; drug target |
How Is carbonate dehydratase activity Regulated?
Carbonic anhydrase activity is regulated at multiple levels. Transcriptionally, hypoxia-inducible factor 1 (HIF-1) induces CA9 and CA12 under low oxygen. Post-translationally, phosphorylation and glycosylation can affect activity and localization. Small-molecule activators and inhibitors provide acute regulation. In mitochondria, CA5A and CA5B are regulated by metabolic demands.
carbonate dehydratase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CA2 | Osteopetrosis | CA2 knockout mouse; patient-derived iPSCs |
| CA9 | Cancer (hypoxia) | CA9 knockout cancer cell lines; xenografts |
| CA12 | Cancer | CA12 overexpression and knockout models |
| MGC1 | Fungal infection | MGC1 knockout in Malassezia; antifungal assays |
| CA5A | Hyperammonemia | CA5A knockout mouse; mitochondrial function assays |
Osteopetrosis
Mutations in CA2 cause autosomal recessive osteopetrosis, characterized by increased bone density due to defective osteoclast function. This highlights the critical role of carbonate dehydratase activity in bone resorption.
Cancer
CA9 and CA12 are overexpressed in many tumors and contribute to acidification of the tumor microenvironment, promoting invasion and metastasis. Inhibitors of these isoforms are being explored as anticancer agents.
Microbial Infections
Fungal carbonic anhydrases, such as that from Malassezia globosa, are essential for growth and are inhibited by plant-derived phenols. Bacterial gamma-carbonic anhydrases are also potential antibiotic targets.
Neurological Disorders
Carbonic anhydrase activators have been shown to enhance synaptic efficacy and may have therapeutic potential in cognitive disorders. CA8 mutations have been linked to cerebellar ataxia in some studies.
From carbonate dehydratase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does CA2 loss cause osteopetrosis? | CA2 knockout mouse or iPSC-derived osteoclasts |
| What is the role of CA9 in tumor growth? | CA9 knockout cancer cell lines and xenografts |
| Can CA activators enhance memory? | CA activator treatment in rodent models |
| Is CA6 required for taste? | CA6 knockout mouse |
| How does CA5A regulate ureagenesis? | CA5A knockout hepatocytes |
| What is the function of CA13? | CA13 knockout and overexpression cell lines |
How to Study the carbonate dehydratase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Wilbur-Anderson assay | CO2 hydration activity | Screening inhibitors/activators |
| Stopped-flow spectrophotometry | Catalytic rate and kinetics | Detailed enzyme kinetics |
| CRISPR knockout | Gene function loss | Phenotypic studies |
| RNA-seq | Gene expression levels | Isoform profiling |
| Western blot | Protein expression | Validation of knockout |
| X-ray crystallography | 3D structure | Drug design |
| Mass spectrometry | Post-translational modifications | Regulation studies |
Enzymatic Activity Assays
Carbonic anhydrase activity is measured using the Wilbur-Anderson assay or stopped-flow spectrophotometry, which monitor pH changes or CO2 hydration. These assays are used to screen inhibitors and activators.
Genetic Knockout and Knock-in Models
CRISPR-Cas9 is used to generate knockout cell lines and mice for carbonic anhydrase genes to study their physiological roles. Point mutations can mimic human disease alleles.
Expression Profiling
RNA-seq and qPCR are used to quantify carbonic anhydrase isoform expression across tissues and conditions. Proteomics can detect protein levels and post-translational modifications.
Structural Biology
X-ray crystallography and NMR provide atomic-level insights into carbonic anhydrase active sites and inhibitor binding. These structures guide drug design.
How CRISPR Can Be Used to Study GO:0004089 carbonate dehydratase activity
Knockout
CRISPR knockout of carbonic anhydrase genes (e.g., CA2, CA9) in cell lines and animal models reveals loss-of-function phenotypes, such as osteopetrosis or reduced tumor growth.
Point Mutation
Introducing disease-associated point mutations (e.g., in CA2) via CRISPR base editing or HDR mimics human pathology and allows study of specific catalytic residues.
Knock-in
Knock-in of tagged carbonic anhydrase (e.g., GFP or FLAG) enables live-cell imaging and proteomic analysis of localization and interactions.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression of carbonic anhydrases (e.g., CA9) models tumor hypoxia and drug resistance.
How EDITGENE Supports carbonate dehydratase activity Research
Researchers studying carbonate dehydratase activity-related genes often need to determine whether a candidate gene is causally involved in a specific phenotype, such as bone resorption or tumor growth. This requires precise genetic manipulation, which can be achieved through CRISPR-based knockout, point mutation, knock-in, or overexpression models. EDITGENE provides these services to accelerate discovery.
Contact EDITGENE today to design your custom CRISPR model for carbonate dehydratase activity research.
Related Products
| Product name | Cat.No. | Species | Gene ID | |
|---|---|---|---|---|
| CA8 Knockout HEK293 Cell Line | EDJ-KQ3502 | Human | 767 | Details Get a Quote |
| CA4 Knockout HEK293 Cell Line | EDJ-KQ4169 | Human | 762 | Details Get a Quote |
| CA5A Knockout HEK293 Cell Line | EDJ-KQ4171 | Human | 763 | Details Get a Quote |
| CA1 Knockout HEK293 Cell Line | EDJ-KQ4174 | Human | 759 | Details Get a Quote |
| CA2 Knockout HEK293 Cell Line | EDJ-KQ4175 | Human | 760 | Details Get a Quote |
| CA12 Knockout HEK293 Cell Line | EDJ-KQ4177 | Human | 771 | Details Get a Quote |
| CA10 Knockout HEK293 Cell Line | EDJ-KQ4179 | Human | 56934 | Details Get a Quote |
| CA7 Knockout HEK293 Cell Line | EDJ-KQ4180 | Human | 766 | Details Get a Quote |
| CA6 Knockout HEK293 Cell Line | EDJ-KQ4181 | Human | 765 | Details Get a Quote |
| CA11 Knockout HEK293 Cell Line | EDJ-KQ4182 | Human | 770 | Details Get a Quote |
| CA3 Knockout HEK293 Cell Line | EDJ-KQ4183 | Human | 761 | Details Get a Quote |
| CA5B Knockout HEK293 Cell Line | EDJ-KQ7342 | Human | 11238 | Details Get a Quote |
| CA14 Knockout HEK293 Cell Line | EDJ-KQ8100 | Human | 23632 | Details Get a Quote |
| CA13 Knockout HEK293 Cell Line | EDJ-KQ12702 | Human | 377677 | Details Get a Quote |
| CA9 Knockout HEK293 Cell Line | EDC07533 | Human | 768 | Details Get a Quote |
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Frequently Asked Questions About carbonate dehydratase activity
What is carbonate dehydratase activity?
It is the reversible hydration of carbon dioxide to bicarbonate and protons, catalyzed by carbonic anhydrases.
What genes are involved in carbonate dehydratase activity?
Genes include CA1, CA2, CA3, CA4, CA5A, CA5B, CA6, CA7, CA8, CA9, CA10, CA11, CA12, CA13, CA14, and microbial homologs.
What is the GO ID for carbonate dehydratase activity?
GO:0004089.
What diseases are linked to carbonate dehydratase activity?
Osteopetrosis, cancer, and microbial infections.
How is carbonate dehydratase activity measured?
Using the Wilbur-Anderson assay or stopped-flow spectrophotometry.
What are carbonic anhydrase activators?
Small molecules that enhance the catalytic activity of carbonic anhydrases, potentially improving memory.
What is the role of CA9 in cancer?
CA9 is induced by hypoxia and contributes to tumor acidosis and progression.
Can CRISPR be used to study carbonic anhydrase genes?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models are widely used.
What is the mitochondrial carbonic anhydrase?
CA5A and CA5B are mitochondrial isoforms involved in ureagenesis and gluconeogenesis.
What is the function of CA6?
CA6 is a secreted carbonic anhydrase found in saliva and milk, involved in taste and digestion.
Conclusion
Carbonate dehydratase activity (GO:0004089) is a fundamental enzymatic function with broad physiological and pathological relevance. Its study spans from basic enzymology to clinical applications in cancer, bone disease, and infections. CRISPR-based models are indispensable for dissecting the roles of individual carbonic anhydrase genes. EDITGENE offers comprehensive services to support such research, from knockout to overexpression and screening.
References
- 1. Tolar J et al.. 2004. Osteopetrosis.. N Engl J Med 351(27):2839-49 PMID: 15625335
- 2. Angeli A. 2024. Bacterial γ-carbonic anhydrases.. Enzymes 55:93-120 PMID: 39223000
- 3. Paloukopoulou C et al.. 2022. Phenols from Origanum dictamnus L. and Thymus vulgaris L. and their activity against Malassezia globosa carbonic anhydrase.. Nat Prod Res 36(6):1558-1564 PMID: 33533668
- 4. Supuran CT. 2018. Carbonic anhydrase activators.. Future Med Chem 10(5):561-573 PMID: 29478330
- 5. Deutsch HF. 1987. Carbonic anhydrases.. Int J Biochem 19(2):101-13 PMID: 3106115
- 6. Rifat T et al.. 2026. Carbonic anhydrase VI.. Enzymes 59:131-154 PMID: 42486545
- 7. Dodgson SJ et al.. 1980. Mitochondrial carbonic anhydrase.. Proc Natl Acad Sci U S A 77(9):5562-6 PMID: 6776540
- 8. Bonardi A. 2026. Carbonic anhydrase XIII.. Enzymes 59:243-270 PMID: 42486549
