GO:1904669 ATP export: Cellular Energy Export Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1904669 ATP export is defined as the directed movement of ATP out of a cell or organelle, also known as ATP efflux.
• ATP export is mediated by dedicated transporters and channels, including ABC transporters, SLC35B1, and peroxisomal cofactor transporters.
• Dysregulated ATP export contributes to drug resistance in cancer, cystic fibrosis, and peroxisomal disorders.
• Key genes include ABCB1, CFTR, SLC35B1, and ABCD1-3, which are experimentally tractable using CRISPR knockout and knock-in models.
• Studying ATP export requires methods such as ATP luminescence assays, live-cell imaging, and transporter-specific transport assays.
• EDITGENE provides CRISPR knockout, point mutation, knock-in, overexpression, and library screening services to dissect ATP export mechanisms.
Description
ATP export, formally annotated as GO:1904669, describes the directed movement of adenosine triphosphate (ATP) out of a cell or organelle. This process is distinct from intracellular ATP shuttling and is critical for extracellular signaling, energy homeostasis, and compartmentalized metabolism. ATP export is mediated by specific membrane proteins that hydrolyze or bind ATP to facilitate its translocation across lipid bilayers. Understanding ATP export is essential because it underpins diverse physiological processes, from mRNA export and drug efflux to peroxisomal protein import and chloride channel regulation. Researchers study ATP export to uncover how cells communicate energy status, how organelles maintain their own ATP pools, and how pathogens or cancer cells evade therapy. For example, ABCB1 (P-glycoprotein) exports hydrophobic drugs in an ATP-dependent manner, directly linking ATP export to multidrug resistance. Similarly, the human SLC35B1 transporter imports ATP into the endoplasmic reticulum, a process that is essentially ATP export from the cytosol. In peroxisomes, ATP-dependent steps are required for protein import, highlighting the organelle-specific nature of ATP export. Given its broad impact, ATP export is a fertile area for CRISPR-based functional genomics. Knockout of ATP export genes can reveal compensatory pathways, while point mutations can dissect catalytic mechanisms. This article synthesizes current knowledge on ATP export, its genetic players, disease relevance, and experimental strategies, providing a resource for biomedical researchers.
ATP export At A Glance
| GO ID | GO:1904669 |
|---|---|
| GO term | ATP export |
| Ontology | biological_process |
| Synonym | ATP efflux |
| Definition | The directed movement of ATP out of a cell or organelle. |
| Major function | Translocation of ATP across membranes to support extracellular signaling, organellar metabolism, and drug efflux. |
| Related transporters | ABCB1, SLC35B1, CFTR, ABCD1-3, ABCB19 |
| Cellular locations | Plasma membrane, endoplasmic reticulum, peroxisome, mitochondria |
| Disease associations | Multidrug resistance, cystic fibrosis, peroxisomal disorders, cancer |
What Is GO:1904669?
GO:1904669 ATP export is the biological process defined as the directed movement of ATP out of a cell or organelle. It encompasses ATP efflux from the cytosol to the extracellular space, as well as ATP transport into organelles such as the endoplasmic reticulum or peroxisomes. This term is a child of 'ATP transport' and is distinct from ATP synthesis or intracellular ATP diffusion. The process requires specific transporters, pumps, or channels that recognize ATP as a substrate and facilitate its movement across membranes, often coupled to ATP hydrolysis or concentration gradients.
Why Is ATP export Important in Cell Biology?
ATP export is fundamental to cellular energy distribution and intercellular communication. It enables cells to release ATP as a signaling molecule, maintain organelle-specific ATP pools, and export toxic compounds or drugs. Dysregulation of ATP export is implicated in cancer drug resistance, cystic fibrosis, and peroxisomal biogenesis disorders. Moreover, ATP export is essential for mRNA export in humans, linking energy metabolism to gene expression. Understanding ATP export mechanisms can reveal therapeutic targets for a wide range of diseases.
• ATP export is required for extracellular ATP signaling, which regulates immune responses, neurotransmission, and inflammation.
• ABCB1-mediated ATP export drives multidrug resistance in cancer by pumping hydrophobic drugs out of cells.
• SLC35B1 imports ATP into the endoplasmic reticulum, a process critical for ER homeostasis and protein folding.
• CFTR, an ATP-gated chloride channel, relies on ATP export for its function; mutations cause cystic fibrosis.
• Peroxisomal ATP export supports protein import and fatty acid oxidation; defects lead to peroxisomal disorders.
• Plant ABCB19 exports brassinosteroids in an ATP-dependent manner, influencing growth and development.
• ATP export is a key mechanism for cellular detoxification via glutathione S-conjugate export pumps.
• Targeting ATP export transporters can overcome drug resistance and modulate immune responses.
• CRISPR screens can identify novel ATP export regulators and their disease relevance.
• ATP export assays are used in drug discovery to screen for transporter inhibitors or activators.
What Happens During ATP export?
Substrate Recognition and Binding
In simple terms: The transporter first grabs the ATP molecule.
ATP export begins when a membrane transporter recognizes and binds ATP. For ABC transporters like ABCB1, ATP binds to the nucleotide-binding domains, inducing conformational changes. In SLC35B1, ATP is recognized in the cytosol and translocated into the ER lumen. The specificity of binding ensures that only ATP or related nucleotides are transported, although some transporters like ABCB1 also export hydrophobic drugs.
Conformational Change and Translocation
In simple terms: The transporter changes shape to push ATP across the membrane.
Upon ATP binding, transporters undergo large conformational changes. ABCB1 employs a twist-and-squeeze mechanism to export substrates. SLC35B1 uses a stepwise translocation process to move ATP into the ER. In peroxisomes, ATP-dependent steps are required for protein import, involving ATP hydrolysis and receptor recycling. These dynamic movements are driven by ATP hydrolysis or electrochemical gradients.
ATP Release and Reset
In simple terms: ATP is released on the other side, and the transporter resets.
After translocation, ATP is released into the target compartment or extracellular space. The transporter then resets to its initial state, often through ATP hydrolysis. For ABCB1, hydrolysis of ATP is coupled to substrate release. In the case of CFTR, ATP export is linked to channel gating and chloride transport. This cycle ensures continuous ATP export as long as substrate and energy are available.
Regulation by Cellular Energy Status
In simple terms: The cell adjusts ATP export based on its energy needs.
ATP export is regulated by cellular energy status and signaling pathways. For instance, AMPK and mTOR may influence transporter expression or activity, although direct evidence for ATP export regulation is limited. In peroxisomes, ATP-dependent import is modulated by PEX proteins and cofactor availability. Additionally, the ATP-gated molecular switch for mRNA export highlights how ATP levels can control nuclear export.
Key Genes Involved in GO:1904669 ATP export
The following genes encode transporters, channels, and regulatory proteins directly involved in ATP export or ATP-dependent export processes.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ABCB1 | ATP-dependent efflux pump for hydrophobic drugs and xenobiotics | Multidrug resistance in cancer; transporter mechanism studies |
| SLC35B1 | ATP translocator into the endoplasmic reticulum | ER homeostasis and protein folding; knockout models |
| CFTR | ATP-gated chloride channel; regulates ATP export | Cystic fibrosis; modulator of ATP efflux |
| ABCB19 | Brassinosteroid export transporter in plants | Plant growth and development; ATP-dependent transport |
| ABCD1 | Peroxisomal ATP-dependent transporter for fatty acids | X-linked adrenoleukodystrophy; peroxisomal import |
| ABCD2 | Peroxisomal transporter involved in very long-chain fatty acid import | Peroxisomal disorders; ATP-dependent steps |
| ABCD3 | Peroxisomal membrane transporter for fatty acids | Peroxisomal biogenesis; ATP export |
| ABCC1 | ATP-dependent glutathione S-conjugate export pump | Detoxification and drug resistance |
| ABCC2 | ATP-dependent export of conjugated drugs | Hepatobiliary transport; multidrug resistance |
| ABCC3 | ATP-dependent export pump for organic anions | Drug disposition; cancer resistance |
| ABCC4 | ATP-dependent export of cyclic nucleotides and drugs | Cellular signaling; drug efflux |
| ABCC5 | ATP-dependent export of nucleotides and drugs | Nucleotide homeostasis; resistance |
| ABCG2 | ATP-dependent efflux of drugs and toxins | Stem cell protection; multidrug resistance |
| PEX1 | Peroxisomal ATP-dependent protein import | Peroxisomal biogenesis disorders |
| PEX6 | Peroxisomal ATP-dependent receptor recycling | Peroxisomal import; ATP hydrolysis |
| PEX26 | Peroxisomal membrane protein for ATP-dependent import | Peroxisomal disorders |
| SLC25A | Mitochondrial ATP/ADP carriers | Mitochondrial ATP export; energy metabolism |
How Is ATP export Regulated?
ATP export is regulated at multiple levels. Transcriptional regulation of transporter genes such as ABCB1 and SLC35B1 responds to cellular stress, xenobiotics, and energy status. Post-translational modifications, including phosphorylation, can modulate transporter activity. In peroxisomes, ATP-dependent import is regulated by PEX proteins and ATP availability. Additionally, the ATP-gated molecular switch for mRNA export demonstrates direct regulation by ATP levels. However, specific signaling pathways like mTOR or ISR have not been extensively linked to ATP export in the provided literature.
ATP export and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| ABCB1 | Multidrug resistance in cancer | Knockout in cancer cell lines; drug sensitivity assays |
| CFTR | Cystic fibrosis | Point mutation (ΔF508) knock-in; chloride transport assays |
| ABCD1 | X-linked adrenoleukodystrophy | Knockout in fibroblasts; peroxisomal import assays |
| SLC35B1 | ER homeostasis disorders | Knockout in HEK293; ATP transport assays |
| ABCB19 | Plant growth defects | Knockout in Arabidopsis; brassinosteroid export assays |
Multidrug Resistance in Cancer
Overexpression of ABCB1 and other ATP-dependent efflux pumps leads to multidrug resistance by exporting chemotherapeutic drugs out of cancer cells. This ATP export mechanism reduces intracellular drug concentrations, rendering treatments ineffective. Inhibiting ATP export transporters is a therapeutic strategy to restore drug sensitivity.
Cystic Fibrosis
Mutations in CFTR, an ATP-gated chloride channel, cause cystic fibrosis. CFTR also influences ATP export, and correction of ΔF508-CFTR function by citrate suggests a link between ATP export and channel activity. Modulating ATP export may improve CFTR function and alleviate disease symptoms.
Peroxisomal Disorders
Defects in peroxisomal ATP-dependent import, involving ABCD1-3 and PEX proteins, lead to disorders such as X-linked adrenoleukodystrophy and Zellweger syndrome. Impaired ATP export into peroxisomes disrupts fatty acid oxidation and causes severe metabolic and neurological symptoms.
Neurodegeneration
Altered ATP export and extracellular ATP signaling are implicated in neurodegenerative conditions, although direct evidence from the provided citations is limited. The ATP-gated mRNA export switch may link energy metabolism to neuronal gene expression.
From ATP export-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does ABCB1 knockout reverse drug resistance? | CRISPR knockout in cancer cell lines |
| How does SLC35B1 mutation affect ER ATP levels? | Point mutation knock-in in HEK293 cells |
| Can CFTR correction restore ATP export? | Knock-in of corrected CFTR in patient-derived cells |
| What is the role of peroxisomal ATP import in disease? | Knockout of ABCD1 in fibroblasts |
| Does overexpression of ABCB1 increase ATP efflux? | Overexpression in drug-sensitive cells |
| Can CRISPR screen identify novel ATP export regulators? | Genome-wide knockout library in cancer cells |
How to Study the ATP export Process
| Method | What It Measures | Typical Application |
|---|---|---|
| ATP luminescence assay | Extracellular ATP concentration | Screening for ATP export modulators |
| Live-cell ATP imaging | Real-time ATP dynamics | Organelle-specific ATP export |
| Radiolabeled ATP transport | ATP flux across membranes | Kinetic analysis of purified transporters |
| CRISPR knockout screen | Gene essentiality for ATP export | Identifying novel regulators |
| Western blot | Transporter protein expression | Validating knockout or overexpression |
| Immunofluorescence | Transporter localization | Subcellular distribution studies |
| Drug sensitivity assay | Cell viability in presence of drugs | Multidrug resistance phenotyping |
| Peroxisomal import assay | ATP-dependent protein import | Peroxisomal disorder modeling |
ATP Luminescence Assays
ATP luminescence assays measure extracellular ATP levels to quantify ATP export activity. Cells are incubated with luciferase reagents, and luminescence is proportional to ATP concentration. This method is used to screen for transporter inhibitors or activators and to compare wild-type and knockout cells.
Live-Cell Imaging with ATP Sensors
Genetically encoded ATP sensors (e.g., ATeam, GO-ATeam) allow real-time visualization of ATP export dynamics in live cells. These sensors can be targeted to specific organelles or the extracellular space to monitor ATP movement. Imaging is useful for studying transporter localization and kinetics.
Transport Assays with Radiolabeled ATP
Radiolabeled ATP (e.g., 32P-ATP) is used in transport assays with membrane vesicles or proteoliposomes to measure ATP export directly. This method provides quantitative kinetic parameters and is ideal for mechanistic studies of purified transporters.
CRISPR Screens and Functional Genomics
Genome-wide CRISPR knockout or activation screens can identify genes that regulate ATP export. Cells are selected for altered ATP efflux or drug resistance, and sgRNA enrichment is analyzed by sequencing. This approach uncovers novel transporters and regulatory pathways.
How CRISPR Can Be Used to Study GO:1904669 ATP export
Knockout
CRISPR knockout of ATP export genes such as ABCB1 or SLC35B1 eliminates transporter function, allowing researchers to assess loss-of-function phenotypes. Knockout cell lines are used to measure changes in ATP efflux, drug sensitivity, and organellar ATP levels. These models are essential for validating gene function and identifying compensatory pathways.
Point Mutation
Point mutations can be introduced into ATP export genes to dissect catalytic residues or regulatory sites. For example, mutating the nucleotide-binding domain of ABCB1 can abolish ATP hydrolysis and transport. Point mutation knock-in models mimic human disease variants, such as CFTR ΔF508, to study ATP export defects.
Knock-in
Knock-in of tagged or reporter genes (e.g., GFP-ABCB1) enables visualization and quantification of ATP export transporters in live cells. Knock-in of disease-associated mutations or corrected genes can rescue phenotypes and test therapeutic strategies. This approach preserves endogenous regulation and splicing.
Overexpression
Overexpression of ATP export genes via CRISPR activation or lentiviral delivery increases transporter levels, enhancing ATP efflux. Overexpression models are used to study drug resistance, transporter saturation, and gain-of-function effects. They complement knockout studies to establish causality.
How EDITGENE Supports ATP export Research
Researchers studying ATP export-related genes often need to determine whether a candidate gene is causally involved in ATP efflux, drug resistance, or organellar ATP homeostasis. CRISPR-based models provide the specificity and reproducibility required for such functional validation.
Contact EDITGENE today to design your custom CRISPR model for ATP export research.
Frequently Asked Questions About ATP export
What is ATP export (GO:1904669)?
ATP export is the directed movement of ATP out of a cell or organelle, also known as ATP efflux.
What genes are involved in ATP export?
Key genes include ABCB1, SLC35B1, CFTR, ABCD1-3, and ABCC family transporters.
How is ATP export measured?
Common methods include ATP luminescence assays, radiolabeled ATP transport, and live-cell imaging with ATP sensors.
What diseases are linked to ATP export?
Multidrug resistance in cancer, cystic fibrosis, and peroxisomal disorders are associated with ATP export defects.
Can CRISPR be used to study ATP export?
Yes, CRISPR knockout, knock-in, and overexpression models are widely used to dissect ATP export mechanisms.
What is the role of ABCB1 in ATP export?
ABCB1 is an ATP-dependent efflux pump that exports hydrophobic drugs, contributing to multidrug resistance.
How does SLC35B1 mediate ATP export?
SLC35B1 translocates ATP into the endoplasmic reticulum in a stepwise manner.
Is ATP export important for peroxisomes?
Yes, peroxisomal protein import requires ATP-dependent steps, and defects cause peroxisomal disorders.
What is the connection between ATP export and mRNA export?
An ATP-gated molecular switch orchestrates human mRNA export, linking ATP levels to gene expression.
How can I create a knockout of an ATP export gene?
EDITGENE provides custom CRISPR knockout cell lines for ATP export genes with validated functional readouts.
Conclusion
ATP export (GO:1904669) is a fundamental biological process that controls energy distribution, drug efflux, and organellar homeostasis. Its dysregulation is implicated in cancer, cystic fibrosis, and peroxisomal disorders, making it a prime target for therapeutic intervention. CRISPR-based models are indispensable for dissecting the molecular players and regulatory networks of ATP export. By leveraging EDITGENE's comprehensive gene editing services, researchers can accelerate discoveries in this vital field.
References
- 1. Hohmann U et al.. 2026. An ATP-gated molecular switch orchestrates human mRNA export.. Nature 649(8098):1042-1050 PMID: 41198879
- 2. Kodan A et al.. 2021. ABCB1/MDR1/P-gp employs an ATP-dependent twist-and-squeeze mechanism to export hydrophobic drugs.. FEBS Lett 595(6):707-716 PMID: 33275773
- 3. Gulati A et al.. 2025. Stepwise ATP translocation into the endoplasmic reticulum by human SLC35B1.. Nature 643(8072):855-864 PMID: 40399679
- 4. Ying W et al.. 2024. Structure and function of the Arabidopsis ABC transporter ABCB19 in brassinosteroid export.. Science 383(6689):eadj4591 PMID: 38513023
- 5. Borkenhagen B et al.. 2022. Recovery of ΔF508-CFTR Function by Citrate.. Nutrients 14(20) PMID: 36296967
- 6. Ishikawa T. 1992. The ATP-dependent glutathione S-conjugate export pump.. Trends Biochem Sci 17(11):463-8 PMID: 1455517
- 7. Plett A et al.. 2020. Peroxisomal Cofactor Transport.. Biomolecules 10(8) PMID: 32806597
- 8. Platta HW et al.. 2024. ATP-Dependent Steps in Peroxisomal Protein Import.. Annu Rev Biochem 93(1):233-259 PMID: 38621235
