GO:0042625 ATPase-coupled ion transmembrane transporter activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0042625 describes molecular functions that move ions across membranes using energy released by ATP hydrolysis, coupling ATP + H2O = ADP + phosphate to ion transport.
• The term covers P-type, F-type, V-type and ABC-type ATPases that pump H+, Na+, K+, Ca2+, Cu+, and other ions against electrochemical gradients.
• Mechanistic studies of subunit a in F-type ATP synthase show that specific cysteine substitutions alter proton gating from each side of the membrane, defining residues that control ion access to the transport pathway.
• ATPase-coupled ion transport is essential for cellular pH homeostasis, membrane potential, nutrient uptake, and ion detoxification, and its dysfunction is linked to metabolic and transport disorders.
• Proteomic and transcriptomic profiling can reveal how ATPase-coupled ion transporters are regulated under environmental stress, as shown in low-temperature studies of Dendrobium huoshanense and amino acid composition studies in common carp.
• CRISPR knockout, point-mutation, knock-in, and overexpression models allow causal testing of individual ATPase-coupled ion transporter genes in disease and physiology.
Description
ATPase-coupled ion transmembrane transporter activity (GO:0042625) is a molecular function that enables the transfer of an ion from one side of a membrane to the other, driven by the reaction ATP + H2O = ADP + phosphate. This activity is fundamental to all living cells because it converts chemical energy into electrochemical gradients that power secondary transport, maintain resting membrane potential, and regulate cytoplasmic ion concentrations. The term is distinct from passive ion channels and from ATP-independent transporters because it explicitly requires ATP hydrolysis as the energy source for ion movement. Researchers study GO:0042625 to understand how cells maintain ion homeostasis, how ATPases are regulated under stress, and how mutations in these transporters contribute to disease. Experimental work on F-type ATP synthase has shown that individual residues in subunit a gate proton transport from each side of the membrane, providing a structural basis for how ATPase-coupled transporters achieve directionality and coupling. In parallel, proteomic and transcriptomic studies in plants and animals demonstrate that ATPase-coupled ion transport systems are dynamically regulated by environmental and developmental cues. Because these transporters are central to physiology, they are also high-value targets for functional genomics, drug discovery, and CRISPR-based disease modeling.
ATPase-coupled ion transmembrane transporter activity At A Glance
| GO ID | GO:0042625 |
|---|---|
| GO term | ATPase-coupled ion transmembrane transporter activity |
| Ontology | molecular_function |
| Synonym | ATPase activity, coupled to transmembrane movement of ions; ATPase coupled ion transmembrane transporter activity; ATP-dependent ion transmembrane transporter activity |
| Definition | Enables the transfer of an ion from one side of a membrane to the other, driven by the reaction ATP + H2O = ADP + phosphate |
| Major function | ATP-powered ion pumping across membranes |
| Representative protein families | P-type ATPases, F-type ATPases, V-type ATPases, ABC transporters |
| Coupled reaction | ATP + H2O = ADP + phosphate |
| Research relevance | Ion homeostasis, membrane potential, stress response, disease modeling |
What Is GO:0042625?
GO:0042625, ATPase-coupled ion transmembrane transporter activity, is defined as enabling the transfer of an ion from one side of a membrane to the other, driven by the reaction ATP + H2O = ADP + phosphate. In other words, it is the molecular function of an ATP-powered ion pump: the protein binds and hydrolyzes ATP, uses the released free energy to change its conformation, and moves a specific ion across a lipid bilayer against its electrochemical gradient. This term is a molecular_function in the Gene Ontology and includes synonyms such as ATPase activity, coupled to transmembrane movement of ions; ATPase coupled ion transmembrane transporter activity; and ATP-dependent ion transmembrane transporter activity. It should not be confused with ion channel activity, which is passive, or with ATPase activity that is not coupled to transmembrane ion movement.
Why Is ATPase-coupled ion transmembrane transporter activity Important in Cell Biology?
ATPase-coupled ion transmembrane transporter activity is important because it is the primary mechanism by which cells create and maintain ion gradients using metabolic energy. These gradients are required for nutrient uptake, pH regulation, cell volume control, and electrical signaling, and they drive secondary transport of metabolites and drugs. Because the activity is directly coupled to ATP hydrolysis, it also links cellular energy status to ion homeostasis, making it a sensitive indicator of metabolic stress and a frequent target of regulation. In research, GO:0042625 provides a precise functional annotation for genes that encode ATP-powered ion pumps, enabling comparative genomics, transcriptomic profiling, and CRISPR-based causal studies.
• Maintains resting membrane potential and electrical excitability in neurons and muscle.
• Controls cytoplasmic pH and organellar pH through proton-pumping ATPases.
• Drives secondary active transport of nutrients, ions, and drugs across membranes.
• Regulates cell volume and osmotic balance via ion gradients.
• Supports stress responses, including low-temperature adaptation in plants.
• Contributes to amino acid composition and fillet quality traits in aquaculture species.
• Provides mechanistic insight into ATP coupling and ion gating through residue-level studies.
• Serves as a target class for drug discovery in cardiovascular, neurological, and metabolic disorders.
• Enables functional annotation of uncharacterized transporter genes in genome projects.
• Offers CRISPR-tractable targets for disease modeling and therapeutic validation.
Molecular Mechanism of ATPase-coupled ion transmembrane transporter activity
ATP binding and hydrolysis
In simple terms: The pump first grabs an ATP molecule and breaks it apart to get energy.
ATPase-coupled ion transporters contain a catalytic site that binds ATP and hydrolyzes it to ADP and inorganic phosphate, releasing free energy. This hydrolysis step is tightly coupled to conformational changes in the transporter, ensuring that ion movement only occurs when ATP is consumed. In F-type ATP synthases, the catalytic sites are located in the F1 sector, and mutations that alter nucleotide handling can uncouple hydrolysis from transport.
Ion binding and gating
In simple terms: The pump has a tunnel that opens to one side of the membrane to let the ion in, then closes and opens to the other side.
Ion access to the transport pathway is controlled by gating residues that alternately expose the ion-binding site to opposite sides of the membrane. Chemical reactivity studies of cysteine substitutions in subunit a of ATP synthase have defined residues that gate H+ transport from each side of the membrane, showing that specific side chains control proton access and release. These gating residues are essential for preventing futile proton leaks and for maintaining coupling between ATP hydrolysis and ion movement.
Conformational cycling and ion translocation
In simple terms: The pump changes shape in a cycle, carrying the ion across the membrane and then resetting.
After ion binding, the transporter undergoes a series of conformational states that move the ion across the membrane and release it on the other side. This cycle is powered by ATP hydrolysis and is reversible in some ATPases, allowing them to synthesize ATP under certain conditions. The directionality of transport is determined by the relative affinity of the ion-binding site in different conformational states and by the gating residues that control access.
Coupling and regulation by cellular signals
In simple terms: The pump does not work alone; the cell can speed it up or slow it down depending on its needs.
ATPase-coupled ion transport is regulated by cellular energy status, ion concentrations, and post-translational modifications. Proteomic studies in Dendrobium huoshanense under low-temperature stress identified changes in lysine dihydroxyisobutyrylation that may affect ATPase-coupled ion transport and cold adaptation. Transcriptomic and genomic profiling in common carp revealed associations between ion transport genes and amino acid composition in fillets, suggesting that ATPase-coupled transporters contribute to metabolic traits. These findings indicate that regulation occurs at multiple levels, from gene expression to protein modification.
Key Genes Involved in GO:0042625 ATPase-coupled ion transmembrane transporter activity
The following genes and protein families represent the major ATPase-coupled ion transmembrane transporters and related subunits that are commonly studied in this functional category.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ATP6V1A | V-type ATPase catalytic subunit | Proton pumping in organelles; lysosomal acidification |
| ATP6V0A1 | V-type ATPase a-subunit | Proton gating and membrane assembly |
| ATP1A1 | Na+/K+-ATPase alpha-1 subunit | Membrane potential; ion homeostasis |
| ATP1A2 | Na+/K+-ATPase alpha-2 subunit | Neuronal excitability; migraine models |
| ATP1A3 | Na+/K+-ATPase alpha-3 subunit | Neuronal function; dystonia models |
| ATP2A1 | SERCA1 calcium pump | Muscle calcium handling |
| ATP2A2 | SERCA2 calcium pump | Cardiac and skeletal muscle function |
| ATP2B1 | Plasma membrane Ca2+ ATPase | Calcium efflux; signaling |
| ATP7A | Copper-transporting ATPase | Copper homeostasis; Menkes disease models |
| ATP7B | Copper-transporting ATPase | Copper homeostasis; Wilson disease models |
| ATP8B1 | P-type ATPase | Bile acid transport; cholestasis models |
| ATP13A2 | P-type ATPase | Lysosomal polyamine transport; neurodegeneration |
| ATP5F1A | F-type ATP synthase alpha subunit | Mitochondrial ATP synthesis and proton transport |
| ATP5F1B | F-type ATP synthase beta subunit | Catalytic nucleotide binding |
| ATP5MC1 | F-type ATP synthase subunit c | Proton translocation in membrane sector |
| ABCB1 | ABC transporter | Drug efflux; multidrug resistance |
| ABCC7 | CFTR chloride channel/ABC transporter | Chloride transport; cystic fibrosis models |
| SLC8A1 | Na+/Ca2+ exchanger (secondary transport) | Calcium homeostasis; indirect coupling to ATPases |
How Is ATPase-coupled ion transmembrane transporter activity Regulated?
ATPase-coupled ion transmembrane transporter activity is regulated at multiple levels, including transcriptional control, post-translational modification, and direct modulation by ions and nucleotides. Proteomic analysis of Dendrobium huoshanense under low-temperature stress revealed changes in lysine dihydroxyisobutyrylation that may influence ATPase-coupled ion transport and cold tolerance. Genomic and transcriptomic profiling in common carp identified associations between ion transport genes and amino acid composition, suggesting that ATPase-coupled transporters are regulated in a tissue- and trait-specific manner. At the protein level, gating residues in subunit a of ATP synthase control proton access and release, and their modification can alter coupling efficiency. These regulatory layers allow cells to match ion transport capacity to metabolic demand and environmental conditions.
ATPase-coupled ion transmembrane transporter activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| ATP7A | Copper transport disorder (Menkes disease-like) | Knockout and point-mutation cell models |
| ATP7B | Copper transport disorder (Wilson disease-like) | Knock-in of patient variants |
| ATP1A2 | Neuronal excitability and migraine-like phenotypes | Point-mutation knock-in |
| ATP1A3 | Dystonia and neurological dysfunction | Knockout and overexpression models |
| ATP13A2 | Neurodegeneration and lysosomal dysfunction | Knockout and tagged knock-in |
ATPase-coupled ion transporters in neurological disease
Mutations in Na+/K+-ATPase and calcium pump genes can disrupt neuronal ion homeostasis, leading to excitability disorders and neurodegeneration. The gating and coupling mechanisms defined for ATP synthase subunit a provide a framework for understanding how disease-associated mutations in related ATPases may impair ion transport.
ATPase-coupled ion transporters in metabolic and transport disorders
Copper-transporting ATPases such as ATP7A and ATP7B are required for copper homeostasis, and their dysfunction causes severe metabolic and hepatic disorders. Similarly, defects in proton-pumping ATPases can alter lysosomal and organellar pH, contributing to storage and metabolic diseases.
ATPase-coupled ion transporters in stress adaptation and aquaculture traits
Proteomic and transcriptomic studies show that ATPase-coupled ion transport genes respond to environmental stress and are associated with metabolic traits such as amino acid composition in fish fillets. These findings link GO:0042625 to cold tolerance in plants and to quality traits in aquaculture species.
From ATPase-coupled ion transmembrane transporter activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is the gene essential for ion homeostasis? | CRISPR knockout cell line |
| Does a specific residue control ion gating? | Point-mutation knock-in |
| Does a disease variant alter transport activity? | Knock-in of patient mutation |
| Where is the transporter localized? | Tagged knock-in (e.g., GFP or HA) |
| Does overexpression change ion flux? | Overexpression cell model |
| Which pathways depend on the transporter? | CRISPR library screening and bioinformatics |
How to Study the ATPase-coupled ion transmembrane transporter activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Proteomics | Protein abundance and modifications | Stress response and post-translational regulation |
| Transcriptomics | Gene expression levels | Trait association and pathway analysis |
| Genomic profiling | Sequence variants and associations | Population genetics and trait mapping |
| Site-directed mutagenesis | Residue-specific function | Ion gating and coupling studies |
| Chemical reactivity assays | Cysteine accessibility and reactivity | Membrane topology and gating |
| CRISPR knockout | Gene essentiality and loss-of-function | Functional genomics screens |
| CRISPR knock-in | Variant-specific effects | Disease modeling |
| Ion flux assays | Transport activity | Pump function validation |
Proteomic profiling of ATPase-coupled ion transporters
Proteomic analysis can quantify ATPase-coupled ion transporter abundance and post-translational modifications under different conditions. For example, lysine dihydroxyisobutyrylation profiling in Dendrobium huoshanense revealed changes in proteins linked to low-temperature stress and ion transport.
Transcriptomic and genomic association studies
RNA-seq and genomic profiling can identify ATPase-coupled ion transporter genes associated with physiological traits. In common carp, transcriptomic and genomic data linked ion transport genes to amino acid composition in fillets.
Residue-level chemical reactivity and mutagenesis
Cysteine substitution and chemical reactivity assays can define residues that gate ion transport in ATPases. Studies on subunit a of ATP synthase used this approach to identify residues controlling H+ transport from each side of the membrane.
CRISPR-based functional genomics
CRISPR knockout, point-mutation, and knock-in models allow direct testing of ATPase-coupled ion transporter gene function in cells and organisms. These models can be combined with ion flux assays and proteomics to link genotype to transport phenotype.
How CRISPR Can Be Used to Study GO:0042625 ATPase-coupled ion transmembrane transporter activity
Knockout
CRISPR knockout of ATPase-coupled ion transporter genes can reveal whether the transporter is essential for ion homeostasis, cell viability, or stress adaptation. Knockout cell lines are useful for measuring changes in membrane potential, pH, and ion flux.
Point Mutation
Point-mutation knock-in can test the role of specific residues in ion gating and ATP coupling, as demonstrated by cysteine substitution studies in ATP synthase subunit a. This approach allows precise structure-function analysis without altering the rest of the protein.
Knock-in
Knock-in of disease-associated variants or tags enables studies of localization, trafficking, and transport activity in a physiological context. Tagged knock-in lines can be used for imaging and proteomic pull-down of ATPase complexes.
Overexpression
Overexpression of ATPase-coupled ion transporters can increase ion transport capacity and reveal downstream effects on signaling, metabolism, and stress tolerance. Overexpression models are also useful for drug screening and for testing gain-of-function hypotheses.
How EDITGENE Supports ATPase-coupled ion transmembrane transporter activity Research
Researchers studying ATPase-coupled ion transmembrane transporter activity-related genes often need to determine whether a candidate gene is causally involved in ion homeostasis, stress adaptation, or disease. EDITGENE provides CRISPR-based cell models and screening services to test these hypotheses directly, from knockout to precise point mutations and tagged knock-ins.
Contact EDITGENE today to design your custom CRISPR model for ATPase-coupled ion transmembrane transporter activity research.
Frequently Asked Questions About ATPase-coupled ion transmembrane transporter activity
What is ATPase-coupled ion transmembrane transporter activity?
It is a molecular function (GO:0042625) that moves an ion across a membrane using energy from ATP hydrolysis, following the reaction ATP + H2O = ADP + phosphate.
What genes are involved in ATPase-coupled ion transmembrane transporter activity?
Genes include P-type ATPases such as ATP1A1, ATP2A1, ATP7A, and ATP7B, V-type ATPases such as ATP6V1A, F-type ATP synthases such as ATP5F1A, and ABC transporters such as ABCB1.
What is the GO ID for ATPase-coupled ion transmembrane transporter activity?
The GO ID is GO:0042625, and it belongs to the molecular_function ontology.
How does ATP hydrolysis drive ion transport?
ATP hydrolysis releases free energy that causes conformational changes in the transporter, allowing it to move ions across the membrane against their gradient.
What is the difference between an ion channel and an ATPase-coupled ion transporter?
Ion channels allow passive ion flow, while ATPase-coupled transporters use ATP hydrolysis to actively pump ions across membranes.
Which residues control ion gating in ATP synthases?
Cysteine substitution studies in subunit a of ATP synthase have identified specific residues that gate H+ transport from each side of the membrane.
How can CRISPR be used to study ATPase-coupled ion transporters?
CRISPR knockout, point-mutation, knock-in, and overexpression models can test gene function, residue-specific roles, and disease variant effects.
What diseases are linked to ATPase-coupled ion transporters?
Dysfunction of these transporters is linked to neurological, metabolic, and copper transport disorders, among others.
How is ATPase-coupled ion transport regulated?
It is regulated by gene expression, post-translational modifications, ion concentrations, and cellular energy status.
What methods are used to study ATPase-coupled ion transmembrane transporter activity?
Common methods include proteomics, transcriptomics, site-directed mutagenesis, chemical reactivity assays, ion flux assays, and CRISPR-based functional genomics.
Conclusion
GO:0042625 ATPase-coupled ion transmembrane transporter activity defines a central class of molecular functions that convert ATP energy into ion gradients essential for cell physiology. Research using proteomics, transcriptomics, and residue-level mutagenesis has revealed how these transporters are regulated and how their gating residues control ion movement. CRISPR-based models now make it possible to test the causal role of individual ATPase-coupled ion transporters in health and disease, providing a direct path from gene annotation to functional insight.
References
- 1. Rao W et al.. 2025. The Role of Lysine Dihydroxyisobutyrylation in Dendrobium huoshanese Under Low-Temperature by Proteomic Analysis.. Physiol Plant 177(3):e70343 PMID: 40536206
- 2. Chen Y et al.. 2025. Genomic and Transcriptomic Profiling of Amino Acid Compositions in Common Carp Fillets.. Animals (Basel) 15(9) PMID: 40362151
- 3. Dong H et al.. 2010. Chemical reactivities of cysteine substitutions in subunit a of ATP synthase define residues gating H+ transport from each side of the membrane.. J Biol Chem 285(51):39811-8 PMID: 20943664
