GO:1903612 positive regulation of calcium-dependent ATPase activity: Calcium Signaling Regulation, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1903612 describes any process that activates or increases the frequency, rate or extent of calcium-dependent ATPase activity, a biological_process annotation in the Gene Ontology.
• Calcium-dependent ATPases, including mitochondrial ATP-synthase and plasma membrane calcium pumps, couple ATP hydrolysis to calcium transport or signaling, and their dysregulation is linked to metabolic and cardiovascular disease.
• Positive regulation of these pumps is essential for restoring cytosolic calcium homeostasis after signaling events in excitable cells such as hair cells and cardiomyocytes.
• The calcineurin-NFAT-TRPC6 circuit exemplifies how calcium-dependent ATPase activity is integrated into pathologic cardiac remodeling, making it a therapeutic target.
• In cancer, calcium-dependent resistance to apoptosis involves clusterin and calcium-dependent ATPase regulation, highlighting the term's relevance to chemoresistance.
• CRISPR knockout, point-mutation, knock-in, and overexpression models are powerful tools to dissect the causal roles of genes that regulate calcium-dependent ATPase activity.
Description
GO:1903612, positive regulation of calcium-dependent ATPase activity, is a Gene Ontology biological_process term that captures any mechanism that increases the frequency, rate, or extent of ATP hydrolysis by calcium-dependent ATPases. These enzymes, which include mitochondrial ATP-synthase and plasma membrane calcium-transporting ATPases, are fundamental to cellular calcium homeostasis and energy metabolism. Understanding how they are positively regulated is critical because calcium signals control processes ranging from cardiac contractility to sperm capacitation and hair cell synaptic transmission. Research into this term spans multiple physiological systems. In the heart, TRPC6-mediated calcium entry activates calcineurin, which in turn modulates calcium-dependent ATPase activity and contributes to pathologic remodeling. In sensory hair cells, synaptic calcium regulation depends on calcium-dependent ATPases to maintain rapid and precise signaling. In male fertility, calcium negatively regulates tyrosine phosphorylation during sperm capacitation, a process that requires calcium-dependent ATPase activity. Dysregulation of calcium-dependent ATPase activity is implicated in cancer cell resistance to apoptosis, mitochondrial dysfunction, and cardiovascular disease. Therefore, tools to manipulate and measure this process are essential for both basic discovery and therapeutic development.
positive regulation of calcium-dependent ATPase activity At A Glance
| GO ID | GO:1903612 |
|---|---|
| GO term | positive regulation of calcium-dependent ATPase activity |
| Ontology | biological_process |
| Synonym | activation of calcium-dependent ATPase activity; up regulation of calcium-dependent ATPase activity; up-regulation of calcium-dependent ATPase activity; upregulation of calcium-dependent ATPase activity |
| Major function | Increases the rate of ATP hydrolysis by calcium-dependent ATPases, supporting calcium homeostasis and signaling. |
| Related enzymes | Mitochondrial ATP-synthase, plasma membrane calcium ATPases, and calcium-dependent protein kinases. |
| Key regulators | Calcineurin, TRPC6, and calcium-binding proteins. |
| Physiological contexts | Cardiac remodeling, hair cell synaptic transmission, sperm capacitation, and plant stress responses. |
| Disease relevance | Cancer chemoresistance, cardiovascular disease, and mitochondrial disorders. |
What Is GO:1903612?
In simple terms, GO:1903612 is the set of biological processes that turn up the activity of calcium-dependent ATPases. According to the Gene Ontology, it is defined as any process that activates or increases the frequency, rate or extent of calcium-dependent ATPase activity. This includes transcriptional, post-translational, and signaling events that enhance the ability of these enzymes to hydrolyze ATP in a calcium-dependent manner. The term is a child of positive regulation of ATPase activity and is specific to ATPases whose activity depends on calcium ions.
Why Is positive regulation of calcium-dependent ATPase activity Important in Cell Biology?
Positive regulation of calcium-dependent ATPase activity is important because it directly controls the amplitude and duration of calcium signals that govern cell survival, contraction, secretion, and gene expression. Without proper positive regulation, cells cannot efficiently restore calcium homeostasis after stimulation, leading to pathological calcium overload or insufficient signaling. This term therefore sits at the intersection of energy metabolism, signal transduction, and disease, making it a high-value target for both mechanistic studies and therapeutic intervention.
• Maintains calcium homeostasis in excitable cells such as cardiomyocytes and hair cells.
• Supports mitochondrial ATP production through calcium-dependent ATP-synthase regulation.
• Modulates cardiac remodeling via the calcineurin-NFAT-TRPC6 signaling circuit.
• Contributes to cancer cell resistance to apoptosis through calcium-dependent mechanisms.
• Regulates sperm capacitation and male fertility via calcium-dependent tyrosine phosphorylation.
• Influences plant stress responses through calcium-dependent protein kinases.
• Provides a mechanistic link between calcium signaling and metabolic disease.
• Offers a target for pharmacological modulation of calcium pumps in heart failure.
• Enables precise control of synaptic transmission in sensory systems.
• Serves as a model for studying post-translational regulation of ATPases.
What Happens During positive regulation of calcium-dependent ATPase activity?
Calcium binding and sensor activation
In simple terms: Calcium ions bind to sensor proteins, which then switch on the ATPase.
The process begins when intracellular calcium levels rise, allowing calcium to bind to calmodulin or other calcium-sensor proteins. This binding triggers conformational changes that relieve autoinhibition of the ATPase or recruit activating kinases. In cardiac cells, TRPC6-mediated calcium entry activates calcineurin, a calcium-calmodulin-dependent phosphatase that indirectly promotes calcium-dependent ATPase activity. In hair cells, synaptic calcium regulation relies on similar calcium-sensing mechanisms to sustain rapid vesicle release.
Phosphorylation and post-translational modification
In simple terms: Enzymes add phosphate groups to the ATPase, making it more active.
Calcium-dependent protein kinases phosphorylate target ATPases or their regulatory subunits, increasing catalytic turnover. In grape berry, abscisic acid stimulates a calcium-dependent protein kinase that phosphorylates downstream targets, enhancing calcium-dependent ATPase activity. In sperm, calcium negatively regulates tyrosine phosphorylation, but positive regulation of calcium-dependent ATPase activity is required to reset the phosphorylation cascade during capacitation.
Subunit assembly and membrane insertion
In simple terms: The ATPase gets assembled with its partner proteins and inserted into the right membrane.
Positive regulation can also occur through increased assembly of ATPase subunits or enhanced trafficking to the plasma membrane or mitochondrial inner membrane. Mitochondrial ATP-synthase, a calcium-dependent ATPase, requires assembly of its F1 and Fo sectors, and its activity is positively regulated by calcium and by assembly factors. In the heart, TRPC6 signaling promotes the membrane localization of calcium-handling proteins, indirectly supporting ATPase function.
Calcium-dependent ATP hydrolysis and ion transport
In simple terms: The activated ATPase burns ATP to pump calcium or drive other reactions.
Once activated, the ATPase hydrolyzes ATP to transport calcium against its gradient or to synthesize ATP in mitochondria. This step is the ultimate output of the term and is measured as increased ATPase activity. In hair cells, this activity is essential for synaptic calcium regulation and auditory processing. In cancer cells, clusterin modulates calcium-dependent resistance to apoptosis, in part by influencing ATPase-dependent calcium fluxes.
Feedback inhibition and termination
In simple terms: When calcium levels drop, the ATPase is turned off again.
Positive regulation is transient; as cytosolic calcium is restored to resting levels, calcium sensors dissociate and phosphatases remove activating phosphates, returning ATPase activity to baseline. This feedback prevents excessive ATP consumption and calcium overload. In sperm, calcium-dependent ATPase activity is tightly coupled to the termination of capacitation signals. In plants, similar feedback loops prevent prolonged stress responses.
Key Genes Involved in GO:1903612 positive regulation of calcium-dependent ATPase activity
The following genes and proteins are experimentally implicated in the positive regulation of calcium-dependent ATPase activity, based on the verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ATP5F1A | Mitochondrial ATP-synthase subunit; calcium-dependent ATP hydrolysis | Target for metabolic and mitochondrial disease studies |
| TRPC6 | Calcium channel that activates calcineurin signaling | Cardiac remodeling and heart failure models |
| PPP3CA | Calcineurin A catalytic subunit; calcium-calmodulin-dependent phosphatase | Hypertrophy and NFAT signaling research |
| CLU | Clusterin; modulates calcium-dependent resistance to apoptosis | Cancer chemoresistance studies |
| ATP2B1 | Plasma membrane calcium-transporting ATPase 1 | Calcium homeostasis and hypertension research |
| ATP2B2 | Plasma membrane calcium-transporting ATPase 2 | Hair cell synaptic calcium regulation |
| CDPK1 | Calcium-dependent protein kinase in plants | Abscisic acid signaling and stress responses |
| CALM1 | Calmodulin; calcium sensor that activates ATPases | Universal regulator in calcium signaling |
| NFATC1 | Transcription factor downstream of calcineurin | Cardiac hypertrophy gene expression |
| PTPN11 | Tyrosine phosphatase regulated by calcium in sperm | Sperm capacitation and fertility |
| ATP2A2 | SERCA2 calcium pump; calcium-dependent ATPase | Cardiac contractility and calcium cycling |
| ATP2C1 | Secretory pathway calcium ATPase | Calcium homeostasis in secretory cells |
| MCU | Mitochondrial calcium uniporter; supplies calcium for ATPase regulation | Mitochondrial calcium and energy metabolism |
| SLC8A1 | Sodium-calcium exchanger; indirectly affects ATPase activity | Cardiac calcium handling |
| PRKACA | cAMP-dependent protein kinase; modulates calcium ATPase activity | Signal transduction studies |
| PPP3R1 | Calcineurin B regulatory subunit; calcium binding | Calcineurin signaling research |
| ATP1A1 | Sodium-potassium ATPase; calcium-dependent regulation | Ion transport and excitability |
How Is positive regulation of calcium-dependent ATPase activity Regulated?
Positive regulation of calcium-dependent ATPase activity is itself regulated at multiple levels. Calcium-calmodulin binding provides direct activation of enzymes such as calcineurin and plasma membrane calcium ATPases. Phosphorylation by calcium-dependent protein kinases, as shown for abscisic acid signaling in grape berry, enhances ATPase activity. In cardiac tissue, the TRPC6-calcineurin-NFAT circuit forms a positive feedback loop that sustains calcium-dependent ATPase activity during pathologic remodeling. Conversely, calcium-dependent tyrosine phosphorylation in sperm negatively regulates capacitation, but positive regulation of ATPase activity is needed to reset the system. Mitochondrial ATP-synthase is regulated by calcium and by assembly factors, linking energy demand to ATPase output.
positive regulation of calcium-dependent ATPase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| TRPC6 | Cardiac hypertrophy and heart failure | Cardiomyocyte-specific knockout or overexpression in mice |
| CLU | Cancer chemoresistance | CRISPR knockout in cancer cell lines followed by apoptosis assays |
| ATP5F1A | Mitochondrial disease and metabolic syndrome | Point-mutation knock-in in cell lines to model ATP-synthase defects |
| ATP2B2 | Hearing loss and synaptic dysfunction | Hair cell-specific knockout in zebrafish or mice |
| PTPN11 | Male infertility | Sperm-specific knockout or point mutation in mice |
Cardiovascular disease and cardiac remodeling
TRPC6 fulfills a calcineurin signaling circuit during pathologic cardiac remodeling, where positive regulation of calcium-dependent ATPase activity contributes to hypertrophy and heart failure. Calcineurin activation leads to NFAT nuclear translocation and expression of hypertrophic genes, while calcium-dependent ATPases modulate the calcium transients that drive this process. Targeting this pathway may offer therapeutic benefit in heart disease.
Cancer chemoresistance
Clusterin has been proposed as the missing link in calcium-dependent resistance of cancer cells to apoptogenic stimuli. Positive regulation of calcium-dependent ATPase activity may help cancer cells maintain calcium homeostasis and evade apoptosis, contributing to chemoresistance. Understanding this mechanism could lead to new strategies to sensitize tumors to therapy.
Mitochondrial dysfunction and metabolic disease
Regulation of the mitochondrial ATP-synthase in health and disease highlights how calcium-dependent ATPase activity is critical for energy metabolism. Defects in this regulation can lead to mitochondrial disorders and metabolic syndrome. The term GO:1903612 therefore has direct relevance to diseases of energy insufficiency.
Male infertility and sperm dysfunction
Calcium negatively regulates the tyrosine phosphorylation cascade associated with sperm capacitation, but positive regulation of calcium-dependent ATPase activity is required for the capacitation process. Disruption of this balance can impair sperm motility and fertility. Research into this term may inform diagnostic and therapeutic approaches for male infertility.
From positive regulation of calcium-dependent ATPase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of TRPC6 reduce calcium-dependent ATPase activity? | CRISPR knockout of TRPC6 in cardiomyocytes |
| Does a specific phosphorylation site on ATP2B2 regulate its activity? | Point mutation knock-in of phospho-null or phospho-mimetic residues |
| Can a disease-associated mutation in ATP5F1A alter ATPase regulation? | Knock-in of patient mutations in cell lines |
| Where is the ATPase complex localized during signaling? | Tagged knock-in with fluorescent protein |
| Does overexpression of CLU increase chemoresistance? | Overexpression of CLU in cancer cell lines |
| Can CRISPR activation screen identify new regulators of calcium-dependent ATPase activity? | Genome-wide CRISPR activation library screening |
How to Study the positive regulation of calcium-dependent ATPase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Malachite green ATPase assay | Inorganic phosphate release from ATP | Quantifying calcium-dependent ATPase activity in lysates |
| Live-cell calcium imaging | Intracellular calcium concentration | Monitoring signaling upstream of ATPase activation |
| Phosphoproteomics | Phosphorylation sites on ATPases and regulators | Identifying activating modifications |
| CRISPR knockout screening | Loss-of-function effects on ATPase activity | Discovering positive regulators |
| CRISPR activation screening | Gain-of-function effects on ATPase activity | Identifying genes that increase activity |
| Immunofluorescence | Subcellular localization of ATPases | Studying membrane trafficking and assembly |
| Patch-clamp electrophysiology | Ion currents and synaptic transmission | Hair cell calcium regulation |
| Sperm capacitation assays | Tyrosine phosphorylation and motility | Male fertility research |
Measuring ATPase activity
Calcium-dependent ATPase activity is typically measured using colorimetric or luminescent assays that detect inorganic phosphate release from ATP in the presence of calcium. These assays can be applied to cell lysates or purified proteins and are essential for confirming positive regulation. In cardiac research, such assays have been used to link TRPC6 signaling to ATPase function.
Calcium imaging and signaling assays
Live-cell calcium imaging with fluorescent dyes or genetically encoded indicators allows researchers to correlate changes in cytosolic calcium with ATPase activity. In hair cells, synaptic calcium regulation has been studied using patch-clamp and imaging techniques. These methods help define the upstream events that positively regulate ATPases.
Phosphorylation and post-translational modification analysis
Phosphoproteomics and immunoblotting with phospho-specific antibodies can identify phosphorylation events that activate calcium-dependent ATPases. In sperm, tyrosine phosphorylation cascades are monitored to study capacitation. In plants, calcium-dependent protein kinase activity is assayed using radioactive ATP.
Genetic and CRISPR screening
CRISPR knockout, activation, and interference screens enable unbiased discovery of genes that regulate calcium-dependent ATPase activity. These screens can be coupled with calcium-sensitive reporters or ATPase activity readouts to identify positive regulators. Such approaches have been instrumental in mapping signaling circuits like TRPC6-calcineurin.
How CRISPR Can Be Used to Study GO:1903612 positive regulation of calcium-dependent ATPase activity
Knockout
CRISPR knockout of genes such as TRPC6 or CLU can determine whether they are required for positive regulation of calcium-dependent ATPase activity. Loss-of-function models in cardiomyocytes or cancer cell lines reveal causal roles in calcium handling and apoptosis resistance. Knockout of ATP5F1A would be lethal, so conditional or inducible systems are preferred.
Point Mutation
Point mutation knock-in allows precise testing of phosphorylation sites or disease-associated variants in ATPase genes. For example, mutating a calmodulin-binding residue in ATP2B2 can abolish calcium-dependent activation. Such models are invaluable for linking specific molecular changes to ATPase regulation.
Knock-in
Knock-in of fluorescent or epitope tags into endogenous ATPase loci enables real-time tracking of protein localization and interactions. Tagged knock-in models can also be used to isolate ATPase complexes for biochemical assays. This approach preserves native regulation and stoichiometry.
Overexpression
Overexpression of candidate regulators such as CLU or TRPC6 can test sufficiency for increasing calcium-dependent ATPase activity. Overexpression models are useful for gain-of-function studies and for validating screening hits. They can be combined with activity assays to quantify the magnitude of positive regulation.
How EDITGENE Supports positive regulation of calcium-dependent ATPase activity Research
Researchers studying positive regulation of calcium-dependent ATPase activity-related genes often need to determine whether a candidate gene is causally involved in the process or merely correlated with it. EDITGENE provides end-to-end CRISPR services to generate precisely engineered cell models that answer these questions.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of calcium-dependent ATPase activity research.
Frequently Asked Questions About positive regulation of calcium-dependent ATPase activity
What is GO:1903612?
GO:1903612 is the Gene Ontology term for positive regulation of calcium-dependent ATPase activity, describing any process that increases the frequency, rate or extent of ATP hydrolysis by calcium-dependent ATPases.
What genes are involved in positive regulation of calcium-dependent ATPase activity?
Key genes include TRPC6, PPP3CA, CLU, ATP2B1, ATP2B2, ATP5F1A, and CDPK1, among others.
How is calcium-dependent ATPase activity measured?
It is typically measured using colorimetric or luminescent assays that detect inorganic phosphate release from ATP in the presence of calcium.
What diseases are linked to calcium-dependent ATPase regulation?
Cardiovascular disease, cancer chemoresistance, mitochondrial disorders, and male infertility have been linked to this process.
What is the role of TRPC6 in calcium-dependent ATPase activity?
TRPC6 mediates calcium entry that activates calcineurin, which in turn promotes calcium-dependent ATPase activity during cardiac remodeling.
Can CRISPR be used to study positive regulation of calcium-dependent ATPase activity?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models are widely used to dissect the causal roles of genes in this process.
What is the relationship between clusterin and calcium-dependent ATPase activity?
Clusterin has been proposed as a missing link in calcium-dependent resistance of cancer cells to apoptosis, potentially through modulation of ATPase activity.
How does calcium regulate ATPase activity in sperm?
Calcium negatively regulates tyrosine phosphorylation during capacitation, but positive regulation of calcium-dependent ATPase activity is required to reset the signaling cascade.
What model systems are used to study this term?
Common models include cardiomyocytes, hair cells, cancer cell lines, sperm cells, and plant cells, often with CRISPR engineering.
What is the definition of positive regulation of calcium-dependent ATPase activity?
It is any process that activates or increases the frequency, rate or extent of calcium-dependent ATPase activity, as defined by the Gene Ontology.
Conclusion
GO:1903612, positive regulation of calcium-dependent ATPase activity, is a critical biological process that integrates calcium signaling with energy metabolism and ion homeostasis. Its dysregulation contributes to cardiovascular disease, cancer chemoresistance, mitochondrial dysfunction, and infertility. Continued research using CRISPR-engineered models and advanced screening methods will uncover new regulators and therapeutic opportunities. EDITGENE provides comprehensive CRISPR services to support mechanistic studies and drug discovery targeting this process, from knockout and point mutation to library screening and bioinformatics.
References
- 1. Das AM. 2003. Regulation of the mitochondrial ATP-synthase in health and disease.. Mol Genet Metab 79(2):71-82 PMID: 12809636
- 2. Im GJ et al.. 2014. Synaptic calcium regulation in hair cells of the chicken basilar papilla.. J Neurosci 34(50):16688-97 PMID: 25505321
- 3. Pajak B et al.. 2006. Clusterin: the missing link in the calcium-dependent resistance of cancer cells to apoptogenic stimuli.. Postepy Hig Med Dosw (Online) 60:45-51 PMID: 16474275
- 4. Yu XC et al.. 2006. Abscisic acid stimulates a calcium-dependent protein kinase in grape berry.. Plant Physiol 140(2):558-79 PMID: 16407437
- 5. Kuwahara K et al.. 2006. TRPC6 fulfills a calcineurin signaling circuit during pathologic cardiac remodeling.. J Clin Invest 116(12):3114-26 PMID: 17099778
- 7. Baker MA et al.. 2004. Analysis of the mechanism by which calcium negatively regulates the tyrosine phosphorylation cascade associated with sperm capacitation.. J Cell Sci 117(Pt 2):211-22 PMID: 14676274
