GO:0017111 ribonucleoside triphosphate phosphatase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0017111 describes the molecular function of catalyzing the hydrolysis of a ribonucleoside triphosphate (NTP) to a ribonucleoside diphosphate (NDP), a proton, and inorganic phosphate.
• This activity is synonymous with NTPase, apyrase, and nucleoside triphosphatase activity and is central to purinergic signaling and energy metabolism.
• Key genes encoding NTPases include ENTPD1 (CD39), ENTPD2, ENTPD3, NTPDase4, and ectonucleotide pyrophosphatases such as ENPP1 and ENPP3.
• NTPase activity regulates extracellular ATP and adenosine levels, thereby modulating immune cell trafficking, inflammation, and vascular tone.
• Dysregulated NTPase activity is implicated in cancer, neurodegeneration, and ischemia-reperfusion injury, making it a therapeutic target.
• CRISPR knockout, point mutation, and overexpression models are essential for dissecting the specific roles of NTPase genes in health and disease.
Description
Ribonucleoside triphosphate phosphatase activity (GO:0017111) is a fundamental molecular function that catalyzes the hydrolysis of a ribonucleoside triphosphate (NTP) into a ribonucleoside diphosphate (NDP), a proton, and inorganic phosphate. This activity is widely known as NTPase or apyrase activity and is performed by a diverse family of enzymes that regulate the concentration of extracellular nucleotides such as ATP, ADP, UTP, and UDP. These enzymes are critical for purinergic signaling, a system that controls numerous physiological processes including neurotransmission, immune responses, and vascular homeostasis. The importance of GO:0017111 extends beyond basic energy metabolism. By controlling the balance of extracellular nucleotides and nucleosides, NTPases shape the activation of purinergic receptors (P1 and P2) and influence cell fate decisions in inflammation, cancer, and tissue repair. For example, the ectonucleotidase CD39 (ENTPD1) hydrolyzes ATP and ADP to AMP, which is subsequently converted to immunosuppressive adenosine, thereby regulating T cell function and immune tolerance. Consequently, researchers studying immunology, oncology, and neuroscience frequently encounter this activity as a key node in disease pathways. Understanding the molecular mechanisms, key genes, and regulatory networks of GO:0017111 is essential for developing targeted therapies. This article provides a comprehensive overview based on authoritative QuickGO data and verified PubMed literature, covering the biological processes, cellular components, molecular mechanisms, key genes, disease associations, and cutting-edge research methods including CRISPR-based models.
ribonucleoside triphosphate phosphatase activity At A Glance
| GO ID | GO:0017111 |
|---|---|
| GO term | ribonucleoside triphosphate phosphatase activity |
| Ontology | molecular_function |
| Synonym | apyrase activity; NTPase activity; nucleoside triphosphatase activity; nucleoside triphosphate hydrolase activity |
| Major function | Hydrolysis of ribonucleoside triphosphates to ribonucleoside diphosphates and phosphate |
| Reaction | a ribonucleoside triphosphate + H2O = a ribonucleoside diphosphate + H+ + phosphate |
| Substrates | ATP, GTP, CTP, UTP and other ribonucleoside triphosphates |
| Cofactors | Typically Mg2+ or Ca2+ dependent for many NTPases |
| Localization | Membrane-bound (ecto-NTPases) and soluble (intracellular NTPases) |
What Is GO:0017111?
GO:0017111, ribonucleoside triphosphate phosphatase activity, is defined by the Gene Ontology as the catalysis of the reaction: a ribonucleoside triphosphate + H2O = a ribonucleoside diphosphate + H+ + phosphate. In other words, it is the enzymatic removal of a terminal phosphate group from a ribonucleoside triphosphate (such as ATP, GTP, CTP, or UTP), releasing a ribonucleoside diphosphate and inorganic phosphate. This activity is synonymous with NTPase, apyrase, and nucleoside triphosphatase activity and is a subset of hydrolase activities acting on acid anhydrides.
Why Is ribonucleoside triphosphate phosphatase activity Important in Cell Biology?
GO:0017111 is critically important because it governs the availability of extracellular nucleotides and nucleosides that act as signaling molecules in purinergic pathways. By hydrolyzing ATP and other NTPs, these enzymes terminate or modulate purinergic receptor activation, thereby influencing immune cell trafficking, inflammation, vascular tone, and neurotransmission. Dysregulation of NTPase activity is linked to a wide range of diseases, including cancer, neurodegeneration, and ischemia-reperfusion injury, making it a prime target for therapeutic intervention.
• Regulates extracellular ATP and adenosine levels, key to purinergic signaling.
• Controls immune cell trafficking and inflammatory responses.
• Modulates vascular tone and thrombosis through adenosine production.
• Involved in neuronal activity regulation and microglial negative feedback.
• Implicated in liver ischemia-reperfusion injury and T regulatory cell function.
• Plays a role in resolving inflammation via DNA-based nanodevices sensing purinergic signals.
• Associated with CD4+ T cell cytotoxic potential during infection.
• Provides targets for cancer immunotherapy and anti-inflammatory drugs.
• Essential for energy metabolism and nucleotide homeostasis.
• Enables research into purinergic nerve hypothesis and neurotransmission.
What Happens During ribonucleoside triphosphate phosphatase activity?
Substrate binding and recognition
In simple terms: The enzyme grabs a molecule of ATP or another similar energy-carrying molecule.
The first step in NTPase activity is the binding of a ribonucleoside triphosphate (e.g., ATP) to the enzyme's active site. This binding is often facilitated by divalent cations such as Mg2+ or Ca2+, which coordinate the phosphate groups and stabilize the substrate. The specificity for ribonucleoside triphosphates over deoxyribonucleoside triphosphates varies among different NTPases, reflecting their distinct physiological roles.
Catalytic hydrolysis
In simple terms: The enzyme cuts off a phosphate group from the molecule using water.
Once bound, the enzyme catalyzes the hydrolysis of the terminal phosphoanhydride bond, cleaving the NTP into an NDP and inorganic phosphate (Pi). This reaction releases a proton (H+) and is typically dependent on divalent metal ions for catalysis. The hydrolysis mechanism involves nucleophilic attack by a water molecule, often activated by a general base, leading to the formation of a pentavalent transition state.
Product release and signaling
In simple terms: The products are released and can act as signals or be further processed.
Following hydrolysis, the NDP and Pi are released from the active site. The NDP can be further hydrolyzed by other enzymes (e.g., CD73/5'-nucleotidase) to adenosine, a potent signaling molecule. This sequential hydrolysis is crucial for terminating ATP-mediated signaling and generating adenosine, which modulates immune responses and vascular function.
Regulation by extracellular environment
In simple terms: The activity can be turned on or off depending on the cell's surroundings.
Extracellular NTPase activity is regulated by the availability of substrates, the presence of inhibitors, and post-translational modifications. For instance, in the vascular system, shear stress and inflammatory cytokines can alter the expression and activity of ecto-NTPases such as CD39. Additionally, the activity can be modulated by interactions with other purinergic signaling components, forming a dynamic network.
Key Genes Involved in GO:0017111 ribonucleoside triphosphate phosphatase activity
The following genes encode enzymes that exhibit ribonucleoside triphosphate phosphatase activity (GO:0017111) and are central to purinergic signaling and nucleotide metabolism.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ENTPD1 (CD39) | Hydrolyzes ATP and ADP to AMP | Immune regulation, cancer immunotherapy, thrombosis |
| ENTPD2 | Hydrolyzes NTPs to NDPs | Neuronal development, cancer progression |
| ENTPD3 | Hydrolyzes UTP and ATP | Airway inflammation, taste signaling |
| ENTPD4 | Intracellular NTPase, UDPase | Golgi function, glycosylation |
| ENTPD5 | UDPase in ER | Protein folding, skeletal development |
| ENTPD6 | NTPase, UDPase | Neural development |
| ENTPD7 | UDPase | Intestinal homeostasis |
| ENTPD8 | NTPase | Liver function, metabolism |
| ENPP1 | Hydrolyzes ATP to AMP and PPi | Bone mineralization, insulin resistance |
| ENPP2 (Autotaxin) | Phosphodiesterase, NTPase | Lysophospholipid signaling, cancer |
| ENPP3 (CD203c) | NTPase, ATPase | Allergy, basophil activation |
| NTPDase1 (CD39) | ATP/ADP hydrolysis | Vascular protection, immune suppression |
| NTPDase2 | ATP hydrolysis | Neural stem cell regulation |
| NTPDase3 | ATP/ADP hydrolysis | Insulin secretion |
| NTPDase8 | ATP/ADP hydrolysis | Liver bile secretion |
| CD73 (NT5E) | 5'-nucleotidase, converts AMP to adenosine | Immunosuppression, cancer |
| Adenosine deaminase (ADA) | Converts adenosine to inosine | Immunodeficiency, purine metabolism |
How Is ribonucleoside triphosphate phosphatase activity Regulated?
The activity of ribonucleoside triphosphate phosphatases is regulated at multiple levels. Transcriptional regulation controls the expression of genes such as ENTPD1 in response to inflammatory stimuli or hypoxia. Post-translational modifications, including glycosylation and phosphorylation, can modulate enzyme activity and localization. Additionally, the availability of substrates and the presence of endogenous inhibitors (e.g., ATP itself at high concentrations) provide feedback regulation. In the immune system, cytokines such as TGF-beta and IL-10 can upregulate CD39 expression, enhancing adenosine production and immunosuppression. Furthermore, the activity can be influenced by interactions with other purinergic signaling components, such as adenosine receptors, creating a complex regulatory network.
ribonucleoside triphosphate phosphatase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| ENTPD1 (CD39) | Cancer, immune evasion, thrombosis | Knockout mice, tumor xenografts |
| ENTPD2 | Neuroinflammation, cancer | Conditional knockout in microglia |
| ENPP1 | Bone mineralization disorders, insulin resistance | Point mutation knock-in mice |
| CD73 (NT5E) | Immunosuppression, cancer | Overexpression in tumor cells |
| ENTPD8 | Liver ischemia-reperfusion injury | Liver-specific knockout |
Cancer and immune evasion
NTPase activity, particularly that of CD39 (ENTPD1) and CD73, contributes to the generation of adenosine in the tumor microenvironment, which suppresses anti-tumor immune responses and promotes cancer progression. High expression of these enzymes is associated with poor prognosis in various cancers, and targeting them has emerged as a promising immunotherapeutic strategy.
Neurodegeneration and neuroinflammation
In the central nervous system, NTPase activity regulates microglial function and neuronal activity. Microglia use NTPases to hydrolyze ATP released during neuronal activity, providing negative feedback control. Dysregulation of this process is implicated in neuroinflammatory and neurodegenerative diseases, where excessive ATP signaling can exacerbate neuronal damage.
Ischemia-reperfusion injury and inflammation
During ischemia-reperfusion injury, extracellular ATP levels rise, triggering inflammation. NTPases such as CD39 hydrolyze ATP to adenosine, which protects tissues by suppressing inflammatory responses. Enhancing NTPase activity or adenosine signaling has been shown to ameliorate liver ischemia-reperfusion injury in preclinical models.
Infectious and parasitic diseases
Purinergic signaling modulated by NTPases influences the immune response to pathogens. In Trypanosoma cruzi infection, NTPase activity affects CD4+ T cell function and cytotoxic potential, highlighting its role in host-pathogen interactions. Modulating these pathways could offer new therapeutic avenues for infectious diseases.
From ribonucleoside triphosphate phosphatase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of ENTPD1 affect tumor immune surveillance? | ENTPD1 knockout mice or CRISPR KO in cancer cell lines |
| How does a point mutation in ENPP1 alter its NTPase activity? | CRISPR point mutation knock-in in cell lines |
| Can overexpression of CD39 protect against ischemia-reperfusion injury? | Transgenic overexpression or viral delivery in mice |
| What is the role of ENTPD2 in microglial negative feedback? | Conditional knockout or tagged knock-in for imaging |
| Does CD73 knockdown enhance anti-tumor immunity? | CRISPR KO in tumor cells followed by adoptive transfer |
| How does NTPase activity regulate T cell trafficking? | Knockout of ENTPD1 in T cells and adoptive transfer |
How to Study the ribonucleoside triphosphate phosphatase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Malachite green assay | Inorganic phosphate release | Kinetic analysis of purified NTPases |
| Luciferase-based ATP assay | ATP consumption | Screening for NTPase inhibitors |
| CRISPR knockout screen | Gene essentiality and pathway discovery | Identifying regulators of purinergic signaling |
| RNA-seq | Gene expression profiles | Comparing NTPase expression in disease vs. normal |
| Proteomics | Protein abundance and modifications | Mapping NTPase interactomes |
| Live-cell imaging with biosensors | Real-time ATP/adenosine dynamics | Studying purinergic signaling in immune cells |
| Flow cytometry | Cell surface expression of CD39/CD73 | Immunophenotyping in cancer |
| ELISA | Cytokine and adenosine levels | Assessing inflammation and immunosuppression |
Enzymatic activity assays
NTPase activity can be measured using colorimetric or luminescent assays that detect inorganic phosphate release (e.g., malachite green assay) or ATP consumption (e.g., luciferase-based assays). These methods are essential for characterizing the kinetic properties of wild-type and mutant enzymes.
CRISPR-based genetic screens
Genome-wide CRISPR knockout or activation screens can identify genes that regulate NTPase activity or purinergic signaling. Such screens have been used to uncover novel modulators of immune cell function and cancer cell survival.
Transcriptomics and proteomics
RNA-seq and mass spectrometry-based proteomics can profile the expression of NTPase genes and their post-translational modifications across different tissues and disease states. These approaches help identify regulatory networks and biomarkers.
Live-cell imaging and biosensors
Genetically encoded fluorescent biosensors (e.g., ATeam, GRABATP) allow real-time monitoring of ATP and adenosine dynamics in living cells and tissues. These tools are invaluable for studying the spatiotemporal regulation of NTPase activity.
How CRISPR Can Be Used to Study GO:0017111 ribonucleoside triphosphate phosphatase activity
Knockout
CRISPR knockout of NTPase genes such as ENTPD1, ENTPD2, or CD73 allows researchers to study loss-of-function phenotypes in cell lines and animal models. For example, ENTPD1 knockout mice exhibit enhanced immune responses and reduced tumor growth, demonstrating the immunosuppressive role of CD39.
Point Mutation
Introducing specific point mutations in NTPase catalytic domains via CRISPR can dissect the contribution of enzymatic activity versus non-enzymatic functions. For instance, mutating the catalytic cysteine in ENPP1 abolishes its NTPase activity, helping to separate its role in bone mineralization from other functions.
Knock-in
CRISPR knock-in of tagged versions (e.g., FLAG, GFP) of NTPases enables precise localization and interaction studies. Tagged knock-in models are particularly useful for imaging NTPase trafficking and identifying binding partners in vivo.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression of NTPases can model gain-of-function conditions observed in cancer and inflammatory diseases. Overexpressing CD39 in tumor cells, for example, increases adenosine production and suppresses anti-tumor immunity.
How EDITGENE Supports ribonucleoside triphosphate phosphatase activity Research
Researchers studying ribonucleoside triphosphate phosphatase activity-related genes often need to determine whether a candidate gene is causally involved in a specific biological process or disease. EDITGENE provides a comprehensive suite of CRISPR-based services to accelerate this discovery, from gene knockout to precise point mutations and library screening.
Contact EDITGENE today to design your custom CRISPR model for ribonucleoside triphosphate phosphatase activity research.
Related Products
| Product name | Cat.No. | Species | Gene ID | |
|---|---|---|---|---|
| RHOT2 Knockout HEK293 Cell Line | EDJ-KQ3200 | Human | 89941 | Details Get a Quote |
| ENTPD2 Knockout HEK293 Cell Line | EDJ-KQ4221 | Human | 954 | Details Get a Quote |
| ENTPD3 Knockout HEK293 Cell Line | EDJ-KQ4222 | Human | 956 | Details Get a Quote |
| ENTPD6 Knockout HEK293 Cell Line | EDJ-KQ4227 | Human | 955 | Details Get a Quote |
| SMPDL3A Knockout HEK293 Cell Line | EDJ-KQ6577 | Human | 10924 | Details Get a Quote |
| ENTPD4 Knockout HEK293 Cell Line | EDJ-KQ6647 | Human | 9583 | Details Get a Quote |
| DHX29 Knockout HEK293 Cell Line | EDJ-KQ11444 | Human | 54505 | Details Get a Quote |
| ENTPD7 Knockout HEK293 Cell Line | EDJ-KQ13292 | Human | 57089 | Details Get a Quote |
| ENTPD8 Knockout HEK293 Cell Line | EDJ-KQ13293 | Human | 377841 | Details Get a Quote |
| RHOT1 Knockout HEK293 Cell Line | EDJ-KQ15064 | Human | 55288 | Details Get a Quote |
| ENTPD1 Knockout HEK293 Cell Line | EDJ-KQ17780 | Human | 953 | Details Get a Quote |
| ENTPD4 Knockout A-549 Cell Line | EDJ-KQ30927 | Human | 9583 | Details Get a Quote |
| ENTPD4 Knockout HCT 116 Cell Line | EDJ-KQ30928 | Human | 9583 | Details Get a Quote |
| ENTPD4 Knockout HeLa Cell Line | EDJ-KQ30929 | Human | 9583 | Details Get a Quote |
| SMPDL3A Knockout A-549 Cell Line | EDJ-KQ32164 | Human | 10924 | Details Get a Quote |
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Frequently Asked Questions About ribonucleoside triphosphate phosphatase activity
What is ribonucleoside triphosphate phosphatase activity?
It is the enzymatic activity that hydrolyzes a ribonucleoside triphosphate (e.g., ATP) into a ribonucleoside diphosphate and inorganic phosphate, as defined by GO:0017111.
What genes are involved in ribonucleoside triphosphate phosphatase activity?
Key genes include ENTPD1 (CD39), ENTPD2, ENTPD3, ENPP1, ENPP3, and CD73, among others.
What is the GO ID for ribonucleoside triphosphate phosphatase activity?
The Gene Ontology ID is GO:0017111.
How is ribonucleoside triphosphate phosphatase activity regulated?
It is regulated by transcriptional control, post-translational modifications, substrate availability, and interactions with other purinergic signaling components.
What diseases are associated with NTPase activity?
Dysregulated NTPase activity is linked to cancer, neurodegeneration, ischemia-reperfusion injury, and infectious diseases.
What is the role of CD39 in the immune system?
CD39 (ENTPD1) hydrolyzes ATP and ADP to AMP, leading to adenosine production that suppresses immune responses and promotes immune tolerance.
How can I study ribonucleoside triphosphate phosphatase activity in the lab?
Common methods include enzymatic activity assays, CRISPR knockout models, RNA-seq, and live-cell imaging with biosensors.
What are the synonyms for ribonucleoside triphosphate phosphatase activity?
Synonyms include apyrase activity, NTPase activity, nucleoside triphosphatase activity, and nucleoside triphosphate hydrolase activity.
Why is NTPase activity important for neuronal function?
Microglia use NTPase activity to hydrolyze ATP released during neuronal activity, providing negative feedback control of neuronal activity.
Can CRISPR be used to study NTPase genes?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models are powerful tools to dissect the function of NTPase genes in health and disease.
Conclusion
Ribonucleoside triphosphate phosphatase activity (GO:0017111) is a fundamental enzymatic function that regulates purinergic signaling, energy metabolism, and immune responses. Its key genes, including ENTPD1, ENPP1, and CD73, are implicated in cancer, neurodegeneration, and inflammatory diseases, making them attractive therapeutic targets. Advances in CRISPR-based models and bioinformatics are accelerating our understanding of these enzymes and their roles in human health. EDITGENE provides the tools and expertise to support this research, from custom knockout cell lines to genome-wide screens.
References
- 1. Badimon A et al.. 2020. Negative feedback control of neuronal activity by microglia.. Nature 586(7829):417-423 PMID: 32999463
- 2. Dou L et al.. 2018. Extracellular ATP signaling and clinical relevance.. Clin Immunol 188:67-73 PMID: 29274390
- 3. Yegutkin GG. 2021. Adenosine metabolism in the vascular system.. Biochem Pharmacol 187:114373 PMID: 33340515
- 4. Jin H et al.. 2025. Purinergic signaling by TCRαβ(+) double-negative T regulatory cells ameliorates liver ischemia-reperfusion injury.. Sci Bull (Beijing) 70(2):241-254 PMID: 39658411
- 5. Li W et al.. 2026. A DNA-based nanodevice senses purinergic signaling and drives an immune switch for resolving inflammation.. Nat Commun 17(1) PMID: 41588001
- 6. Ferrari D et al.. 2016. Purinergic Signaling During Immune Cell Trafficking.. Trends Immunol 37(6):399-411 PMID: 27142306
- 7. Bergero G et al.. 2025. Purinergic signaling modulates CD4+ T cells with cytotoxic potential during Trypanosoma cruzi infection.. J Clin Invest 135(13) PMID: 40590226
- 8. Burnstock G. 1977. The purinergic nerve hypothesis.. Ciba Found Symp PMID: 24531
