GO:1902559 3'-phospho-5'-adenylyl sulfate transmembrane transport: Sulfation Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1902559 describes the biological process in which 3'-phospho-5'-adenylyl sulfate (PAPS), the universal sulfate donor, is transported across a membrane.
• PAPS is synthesized from sulfate and ATP and is used by sulfotransferases for sulfation of glycoproteins, glycolipids, and hormones.
• Transport of PAPS across membranes is essential for sulfation reactions in the Golgi lumen and other compartments.
• Sulfation is critical for development, detoxification, and signaling, and its disruption is linked to diseases such as cystic fibrosis and cancer.
• Research on PAPS transport uses knockout, knock-in, and overexpression models to study sulfation-dependent pathways.
• EDITGENE provides CRISPR services to create such models for studying GO:1902559 and related genes.
Description
3'-phospho-5'-adenylyl sulfate (PAPS) is the activated sulfate donor required for all sulfation reactions in eukaryotes. The transport of PAPS across cellular membranes, defined by the Gene Ontology term GO:1902559, is a critical step that supplies sulfate for sulfotransferases in the Golgi apparatus and other organelles. This process ensures that sulfation of proteins, lipids, and glycosaminoglycans occurs properly, impacting development, detoxification, and cell signaling. Researchers study PAPS transport to understand how sulfation is regulated and how defects contribute to diseases such as cystic fibrosis and cancer. The transport mechanism involves specific membrane proteins that facilitate the movement of this charged molecule across lipid bilayers. Understanding GO:1902559 is therefore essential for dissecting sulfation-dependent biological pathways and for developing therapeutic strategies targeting these processes.
3'-phospho-5'-adenylyl sulfate transmembrane transport At A Glance
| GO ID | GO:1902559 |
|---|---|
| GO term | 3'-phospho-5'-adenylyl sulfate transmembrane transport |
| Ontology | biological_process |
| Synonym | 3'-phosphoadenosine 5'-phosphosulfate transmembrane transport |
| Definition | The process in which 3'-phospho-5'-adenylyl sulfate is transported across a membrane. |
| Major function | Delivery of the sulfate donor PAPS for sulfation reactions |
| Related transporters | Members of the solute carrier family and ABC transporters |
| Associated diseases | Cystic fibrosis, cancer, developmental disorders |
What Is GO:1902559?
GO:1902559, 3'-phospho-5'-adenylyl sulfate transmembrane transport, is the process in which 3'-phospho-5'-adenylyl sulfate (PAPS) is moved across a membrane. This transport is necessary to deliver PAPS from its site of synthesis in the cytosol to the lumen of the Golgi apparatus and other compartments where sulfation occurs.
Why Is 3'-phospho-5'-adenylyl sulfate transmembrane transport Important in Cell Biology?
PAPS transport is vital because sulfation is a major post-translational modification that regulates protein function, hormone activity, and detoxification. Without proper PAPS transport, sulfation reactions in the Golgi and other organelles cannot proceed, leading to impaired synthesis of sulfated glycoproteins, glycolipids, and glycosaminoglycans. This process is also critical for the activation and inactivation of signaling molecules, including hormones and neurotransmitters. Consequently, defects in PAPS transport have been implicated in diseases such as cystic fibrosis, where ion transport and sulfation are dysregulated, and in cancer, where altered sulfation affects cell growth and metastasis. Studying GO:1902559 thus provides insights into fundamental cell biology and disease mechanisms.
• PAPS is the universal sulfate donor for all sulfation reactions, making its transport essential for cellular function.
• Sulfation modulates the activity of hormones, neurotransmitters, and drugs, impacting detoxification and signaling.
• PAPS transport is required for the synthesis of sulfated glycosaminoglycans, which are key components of the extracellular matrix.
• Defects in PAPS transport can lead to impaired development and organ function, as seen in animal models.
• Altered sulfation is associated with cancer progression and metastasis.
• Cystic fibrosis involves dysregulated ion transport, and PAPS transport may influence the disease phenotype.
• Understanding PAPS transport can aid in drug design, as many drugs are sulfated for excretion.
• Research on PAPS transport benefits from CRISPR models to dissect gene function.
• The process is conserved across eukaryotes, making model organisms valuable for study.
• PAPS transport is a potential target for modulating sulfation in therapeutic contexts.
What Happens During 3'-phospho-5'-adenylyl sulfate transmembrane transport?
Synthesis of PAPS in the cytosol
In simple terms: PAPS is made inside the cell from sulfate and ATP.
PAPS is synthesized in the cytosol by the sequential action of ATP sulfurylase and APS kinase, using sulfate and ATP as substrates. This two-step process activates sulfate for transfer reactions. The synthesis is tightly regulated to match cellular demand for sulfation.
Recognition and binding by membrane transporters
In simple terms: Specific proteins in the membrane grab PAPS and prepare to move it across.
Membrane transporters, such as members of the solute carrier family, recognize PAPS and bind it with high affinity. These proteins undergo conformational changes to facilitate transport. The binding is specific to PAPS, distinguishing it from other nucleotides.
Translocation across the lipid bilayer
In simple terms: The transporter flips PAPS through the membrane into the organelle.
The transporter undergoes a series of conformational shifts that move PAPS from the cytosolic side to the luminal side of the membrane. This process may be driven by concentration gradients or ATP hydrolysis, depending on the transporter type. The translocation step is rate-limiting for sulfation in some cells.
Release of PAPS into the lumen
In simple terms: PAPS is released inside the organelle where it is needed.
Once across the membrane, PAPS is released into the lumen of the Golgi apparatus or other compartments. There, it serves as a substrate for sulfotransferases, which transfer sulfate to acceptor molecules. The release is coupled to the transporter's conformational cycle.
Regulation and feedback
In simple terms: The cell adjusts PAPS transport based on need.
PAPS transport is regulated by the availability of PAPS and the activity of sulfotransferases. Feedback mechanisms ensure that transport matches the demand for sulfation. Hormonal and developmental signals can also influence transporter expression.
Key Genes Involved in GO:1902559 3'-phospho-5'-adenylyl sulfate transmembrane transport
The following genes and proteins are involved in or related to 3'-phospho-5'-adenylyl sulfate transmembrane transport, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| SLC13A1 | Sodium-sulfate cotransporter; supplies sulfate for PAPS synthesis | Studied for sulfate homeostasis and transport |
| SLC26A1 | Sulfate transporter; may influence PAPS synthesis | Potential role in sulfate uptake |
| SLC26A2 | Sulfate transporter; mutations cause diastrophic dysplasia | Linked to sulfation defects |
| SLC35B2 | PAPS transporter into Golgi; key for sulfation | Directly mediates PAPS transport |
| SLC35B3 | PAPS transporter; alternative isoform | Potential redundancy in PAPS transport |
| PAPSS1 | ATP sulfurylase/APS kinase; synthesizes PAPS | Regulates PAPS availability |
| PAPSS2 | Bifunctional enzyme; synthesizes PAPS | Mutations cause skeletal dysplasia |
| SULT1A1 | Sulfotransferase; uses PAPS for sulfation | Major drug-metabolizing enzyme |
| SULT2A1 | Sulfotransferase; sulfates steroids | Endocrine regulation |
| CHST3 | Carbohydrate sulfotransferase; uses PAPS | Cartilage development |
| CHST14 | Dermatan sulfate sulfotransferase | Connective tissue disorders |
| UST | Uronyl 2-sulfotransferase | Glycosaminoglycan sulfation |
| TPST1 | Tyrosylprotein sulfotransferase | Protein sulfation in Golgi |
| TPST2 | Tyrosylprotein sulfotransferase | Protein sulfation in Golgi |
| CFTR | Chloride channel; sulfation affects function | Cystic fibrosis |
| SLC26A9 | Chloride/bicarbonate transporter | Ion transport in epithelia |
| SLC4A4 | Bicarbonate transporter | pH regulation and sulfation |
| SLC13A4 | Sulfate transporter | Sulfate transport in brain |
How Is 3'-phospho-5'-adenylyl sulfate transmembrane transport Regulated?
PAPS transport is regulated at multiple levels. The expression of PAPS transporters such as SLC35B2 can be induced by cellular stress and hormonal signals. The availability of PAPS itself, controlled by the enzymes PAPSS1 and PAPSS2, feeds back on transport activity. Additionally, sulfotransferase expression and activity influence the demand for PAPS, indirectly regulating transport. In the kidney, sulfate reabsorption by SLC13A1 affects systemic sulfate levels and thus PAPS synthesis. In cystic fibrosis, ion transport dysregulation may impact sulfation processes.
3'-phospho-5'-adenylyl sulfate transmembrane transport and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CFTR | Cystic fibrosis; ion transport | Knockout or point-mutation in cell lines |
| PAPSS2 | Skeletal dysplasia; sulfation defect | Knock-in of patient mutations |
| SLC26A2 | Diastrophic dysplasia | Knockout mouse or cell model |
| SULT1A1 | Cancer; drug metabolism | Overexpression or knockout in cancer cells |
| SLC35B2 | Sulfation-dependent development | Knockout in zebrafish or cells |
Cystic Fibrosis and Ion Transport
Cystic fibrosis is caused by mutations in CFTR, a chloride channel. Sulfation of proteins and lipids is altered in cystic fibrosis, and PAPS transport may influence the disease phenotype by affecting the sulfation of CFTR or associated proteins. Targeting ion channels in cystic fibrosis is a therapeutic strategy, and understanding PAPS transport could provide new insights.
Cancer and Sulfation
Altered sulfation is observed in many cancers. PAPS transport affects the sulfation of glycosaminoglycans and signaling molecules, which can influence tumor growth and metastasis. Sulfotransferases that use PAPS are implicated in hormone-dependent cancers, and PAPS availability is a key factor.
Developmental Disorders
Mutations in genes involved in PAPS synthesis or transport cause developmental disorders, such as skeletal dysplasias. For example, defects in PAPSS2 lead to impaired sulfation and abnormal bone development. Similarly, mutations in SLC26A2 cause diastrophic dysplasia due to defective sulfation of cartilage proteoglycans.
From 3'-phospho-5'-adenylyl sulfate transmembrane transport-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does SLC35B2 mediate PAPS transport? | Knockout cell line (e.g., HeLa) |
| What is the effect of PAPS transport on sulfation? | Point mutation in transporter |
| Can we tag PAPS transporters for imaging? | Knock-in with fluorescent tag |
| Does overexpression of PAPS transporter increase sulfation? | Overexpression in HEK293 cells |
| What genes regulate PAPS transport? | CRISPR library screening |
| How does PAPS transport affect development? | Knockout mouse model |
How to Study the 3'-phospho-5'-adenylyl sulfate transmembrane transport Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Radioactive PAPS transport assay | Rate of PAPS uptake | Characterizing transporter activity |
| Metabolic labeling with 35S-sulfate | Sulfation of macromolecules | Assessing global sulfation |
| RNA-seq | Gene expression changes | Identifying regulators of PAPS transport |
| CRISPR knockout screen | Genes affecting PAPS transport | Discovery of novel pathway components |
| Western blot | Protein levels of transporters | Validating expression changes |
| Immunofluorescence | Subcellular localization | Determining transporter localization |
| Mass spectrometry | Sulfated metabolites | Profiling sulfation patterns |
| qPCR | mRNA levels | Quantifying transporter expression |
Transport Assays
Radioactive or fluorescent PAPS analogs can be used to measure transport activity in isolated membrane vesicles or intact cells. These assays quantify the rate of PAPS uptake and are essential for characterizing transporter kinetics.
Sulfation Analysis
Sulfation of proteins and lipids can be assessed by metabolic labeling with radioactive sulfate, followed by gel electrophoresis or chromatography. This method reveals the impact of PAPS transport on downstream sulfation.
Gene Expression Profiling
RNA-seq can identify changes in the expression of PAPS transporters and sulfotransferases under different conditions. This helps understand how transport is regulated at the transcriptional level.
CRISPR Screening
Genome-wide CRISPR knockout screens can identify genes that regulate PAPS transport or sulfation. Such screens are powerful for discovering novel components of the pathway.
How CRISPR Can Be Used to Study GO:1902559 3'-phospho-5'-adenylyl sulfate transmembrane transport
Knockout
CRISPR knockout of PAPS transporter genes (e.g., SLC35B2) can abolish sulfation, providing a clean model to study the consequences of defective PAPS transport. Such knockouts are valuable for identifying sulfation-dependent processes.
Point Mutation
Introducing point mutations in PAPS transporters can mimic human disease variants or disrupt specific residues required for transport. These models help dissect the molecular mechanism of transport.
Knock-in
Knock-in of tagged versions of PAPS transporters (e.g., GFP or HA) allows visualization and purification of the transporter for biochemical studies. This approach is useful for tracking transporter localization and interactions.
Overexpression
Overexpression of PAPS transporters can increase sulfation capacity and is used to study the effects of enhanced transport on cellular functions. This model is particularly useful for producing sulfated biomolecules in vitro.
How EDITGENE Supports 3'-phospho-5'-adenylyl sulfate transmembrane transport Research
Researchers studying 3'-phospho-5'-adenylyl sulfate transmembrane transport-related genes often need to determine whether a candidate gene is causally involved in sulfation-dependent processes. EDITGENE provides comprehensive CRISPR services to create precisely engineered cell models for such investigations.
Contact EDITGENE today to design your custom CRISPR model for 3'-phospho-5'-adenylyl sulfate transmembrane transport research.
Frequently Asked Questions About 3'-phospho-5'-adenylyl sulfate transmembrane transport
What is GO:1902559?
GO:1902559 is the Gene Ontology term for the process of 3'-phospho-5'-adenylyl sulfate (PAPS) transmembrane transport, which moves PAPS across membranes for sulfation reactions.
What is 3'-phospho-5'-adenylyl sulfate?
PAPS is the universal sulfate donor used by sulfotransferases to modify proteins, lipids, and other molecules.
What genes are involved in PAPS transport?
Genes such as SLC35B2, SLC35B3, and SLC26A2 encode proteins that transport PAPS or sulfate.
Why is PAPS transport important?
It is essential for sulfation, which regulates development, detoxification, and signaling.
What diseases are linked to PAPS transport?
Defects in PAPS transport or synthesis are linked to skeletal dysplasias, cystic fibrosis, and cancer.
How can I study PAPS transport?
You can use transport assays, metabolic labeling, and CRISPR models to study PAPS transport.
What CRISPR models are available for PAPS transport?
Knockout, point mutation, knock-in, and overexpression models can be created for genes like SLC35B2.
What is the role of SLC35B2?
SLC35B2 is a Golgi transporter that mediates PAPS transport into the Golgi lumen for sulfation.
How does PAPS transport affect cancer?
Altered PAPS transport can affect sulfation of signaling molecules, influencing cancer progression.
Can I order custom CRISPR services for PAPS transport genes?
Yes, EDITGENE provides custom CRISPR services for any gene related to PAPS transport.
Conclusion
3'-phospho-5'-adenylyl sulfate transmembrane transport (GO:1902559) is a fundamental biological process that supplies the sulfate donor PAPS for sulfation reactions. Its proper regulation is essential for development, detoxification, and signaling, and its dysfunction is implicated in diseases such as cystic fibrosis and cancer. Studying this process using CRISPR models and other methods will continue to reveal new insights into sulfation biology and potential therapeutic targets.
References
- 1. Markovich D. 2014. Na+-sulfate cotransporter SLC13A1.. Pflugers Arch 466(1):131-7 PMID: 24193406
- 2. Markovich D. 2012. Sodium-sulfate/carboxylate cotransporters (SLC13).. Curr Top Membr 70:239-56 PMID: 23177988
- 3. Verkman AS et al.. 2021. Chloride transport modulators as drug candidates.. Am J Physiol Cell Physiol 321(6):C932-C946 PMID: 34644122
- 4. Sterling D et al.. 2002. Bicarbonate transport proteins.. Biochem Cell Biol 80(5):483-97 PMID: 12440690
- 5. Cohen MM Jr. 2003. The hedgehog signaling network.. Am J Med Genet A 123A(1):5-28 PMID: 14556242
- 6. Norvaisa K et al.. 2024. Synthetic transporters for oxoanions.. Curr Opin Chem Biol 83:102542 PMID: 39541647
- 7. Mall MA et al.. 2015. Targeting ion channels in cystic fibrosis.. J Cyst Fibros 14(5):561-70 PMID: 26115565
