GO:0015116 sulfate transmembrane transporter activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0015116 describes the molecular function of moving sulfate ions (SO4(2-)) across a membrane, a process essential for sulfur metabolism, sulfation and cellular homeostasis.
• The activity is carried out by sulfate transporters such as SLC13A1, SLC26A2 (DTDST) and plant SHST1, which use electrochemical gradients or anion exchange to translocate sulfate.
• Mutations in the sulfate transporter SLC26A2 impair sulfate transport and cause diastrophic dysplasia and related chondrodysplasias, directly linking GO:0015116 to human disease.
• Sulfate transport is regulated at the level of transporter expression and membrane targeting, and can be influenced by cellular stress and autophagy pathways.
• Experimental dissection of sulfate transport relies on transport assays, site-directed mutagenesis, knockout and knock-in models, and high-throughput screening.
• CRISPR-based knockout, point mutation, knock-in and overexpression models enable causal testing of sulfate transporter genes in disease and metabolism.
Description
Sulfate (SO4(2-)) is an essential anion required for the sulfation of proteins, glycosaminoglycans, steroids and xenobiotics, and for maintaining cellular redox and ion balance. The movement of sulfate across biological membranes is mediated by specific transport proteins, and the Gene Ontology term GO:0015116 (sulfate transmembrane transporter activity) captures this molecular function. Understanding this activity is fundamental to sulfur metabolism, developmental biology and pharmacology, because sulfate cannot freely diffuse across lipid bilayers and must be supplied to the cytosol and organelles by dedicated transporters. Sulfate transporters are found in all kingdoms of life and fall into several protein families, including the SLC13 and SLC26 families in mammals and the SHST1-type transporters in plants. Their activity is critical for normal skeletal development, as demonstrated by the chondrodysplasia phenotype caused by mutations in the diastrophic dysplasia sulfate transporter (DTDST/SLC26A2). In addition, sulfate transport is integrated with cellular quality-control pathways such as autophagy, which can influence transporter availability and ion homeostasis. For researchers, GO:0015116 provides a precise functional annotation to interpret genomic and proteomic data, to design transport assays, and to build disease models. This article reviews the definition, mechanism, key genes, regulation, disease links and experimental methods associated with sulfate transmembrane transporter activity, with all statements supported by published literature.
sulfate transmembrane transporter activity At A Glance
| GO ID | GO:0015116 |
|---|---|
| GO term | sulfate transmembrane transporter activity |
| Ontology | molecular_function |
| Synonym | sulfate permease activity; sulphate transporter activity |
| Definition | Enables the transfer of sulfate ions, SO4(2-), from one side of a membrane to the other. |
| Major function | Mediates sulfate uptake and distribution across cellular membranes for sulfation, sulfur metabolism and ion homeostasis. |
| Representative genes | SLC13A1, SLC26A2 (DTDST), SHST1 (plant) |
| Cellular location | Plasma membrane, mitochondrial membrane, and other organelle membranes |
| Related diseases | Diastrophic dysplasia, chondrodysplasias, sulfate metabolism disorders |
What Is GO:0015116?
GO:0015116, sulfate transmembrane transporter activity, is defined as the molecular function that enables the transfer of sulfate ions (SO4(2-)) from one side of a membrane to the other. This activity is typically mediated by integral membrane proteins that form a translocation pathway for sulfate, often coupled to the movement of other ions such as sodium or chloride, or driven by an electrochemical gradient. The term is a child of transmembrane transporter activity and is synonymous with sulfate permease activity and sulphate transporter activity.
Why Is sulfate transmembrane transporter activity Important in Cell Biology?
Sulfate transmembrane transporter activity is essential for providing sulfate to cells and organelles for the synthesis of sulfated macromolecules, for detoxification, and for maintaining ionic balance. Defects in sulfate transport cause developmental disorders such as diastrophic dysplasia, and altered sulfate homeostasis has been linked to broader metabolic and stress responses. Because sulfate transporters are drug targets and disease genes, understanding GO:0015116 is critical for both basic biology and translational research.
• Provides sulfate for sulfation of proteoglycans, steroids and xenobiotics.
• Mutations in SLC26A2 cause diastrophic dysplasia and related chondrodysplasias.
• Sulfate transport is required for normal skeletal and connective tissue development.
• Transporter activity influences cellular redox and ion homeostasis.
• Sulfate transporters are potential drug targets for metabolic and inflammatory diseases.
• Autophagy and cellular stress pathways can modulate transporter function and ion balance.
• Plant sulfate transporters like SHST1 are important for sulfur assimilation and crop nutrition.
• GO:0015116 annotation aids functional genomics and variant interpretation.
What Happens During sulfate transmembrane transporter activity?
Substrate recognition and binding
In simple terms: The transporter first grabs a sulfate ion from one side of the membrane.
Sulfate transporters contain a substrate-binding site that recognizes the tetrahedral sulfate ion with high specificity, often through positively charged amino acid residues that interact with the sulfate oxygens. In the plant transporter SHST1, charged residues within transmembrane helices are critical for substrate binding and transport. Similarly, the mammalian Na+-sulfate cotransporter SLC13A1 binds sulfate in a sodium-dependent manner.
Conformational change and translocation
In simple terms: The protein changes shape to move the sulfate across the membrane.
Upon substrate binding, the transporter undergoes conformational changes that expose the bound sulfate to the opposite side of the membrane. This alternating-access mechanism is a common feature of secondary active transporters. In SLC26A2 (DTDST), mutations that alter conserved residues impair this translocation step, leading to reduced sulfate transport activity.
Coupling to ion gradients
In simple terms: The transporter uses the energy of other ions moving down their gradients to pull sulfate across.
Many sulfate transporters are secondary active transporters that couple sulfate movement to the symport or antiport of other ions such as Na+ or Cl-. SLC13A1 is a Na+-sulfate cotransporter that uses the sodium gradient to drive sulfate uptake. In contrast, SLC26A2 functions as a sulfate/chloride exchanger, and its activity depends on the chloride gradient.
Release and resetting
In simple terms: The sulfate is released on the other side, and the transporter resets for another round.
After sulfate is released into the target compartment, the transporter returns to its initial conformation to allow another transport cycle. This cycle is essential for continuous sulfate supply, and its rate can be modulated by regulatory factors. Mutations that stabilize an inactive conformation reduce net transport and cause disease.
Key Genes Involved in GO:0015116 sulfate transmembrane transporter activity
The following genes encode proteins that directly mediate or regulate sulfate transmembrane transporter activity (GO:0015116) and are widely studied in human, animal and plant systems.
| Gene | Major Role | Research Relevance |
|---|---|---|
| SLC13A1 | Na+-sulfate cotransporter in kidney and intestine | Sulfate reabsorption, plasma sulfate homeostasis |
| SLC26A2 (DTDST) | Sulfate/chloride exchanger in chondrocytes | Diastrophic dysplasia and chondrodysplasias |
| SHST1 | Plant sulfate transporter | Sulfate uptake and sulfur assimilation |
| SLC26A1 | Sulfate transporter in kidney and liver | Sulfate homeostasis and detoxification |
| SLC26A3 | Chloride/sulfate exchanger in intestine | Electrolyte transport and diarrhea |
| SLC26A4 | Pendrin, anion exchanger | Sulfate transport in inner ear and thyroid |
| SLC26A6 | Anion exchanger in gut and kidney | Sulfate and oxalate transport |
| SLC26A7 | Anion transporter | Sulfate transport in kidney |
| SLC26A8 | Sulfate transporter in testis | Sperm function and male fertility |
| SLC26A9 | Anion transporter in lung | Sulfate and chloride transport |
| SLC26A11 | Sulfate transporter in lysosomes | Lysosomal sulfate homeostasis |
| SLC13A4 | Na+-sulfate cotransporter | Sulfate transport in brain and placenta |
| SLC13A5 | Citrate transporter with sulfate affinity | Metabolic regulation |
| SULTR1;1 | Plant high-affinity sulfate transporter | Sulfur nutrition and stress responses |
| SULTR2;1 | Plant vascular sulfate transporter | Sulfate distribution in plants |
| SULTR3;1 | Plant chloroplast sulfate transporter | Sulfate transport into plastids |
| SULTR4;1 | Plant vacuolar sulfate exporter | Sulfate remobilization |
How Is sulfate transmembrane transporter activity Regulated?
Sulfate transmembrane transporter activity is regulated at multiple levels, including transcriptional control of transporter genes, post-translational modifications, and membrane trafficking. Cellular stress pathways such as autophagy can influence the availability of transporters at the plasma membrane and affect ion homeostasis. Mitochondrial respiratory chain deficiency has been shown to inhibit lysosomal hydrolysis, which may indirectly affect sulfate transporter recycling. In addition, PINK1 deficiency alters mitochondrial iron accumulation and colon tumorigenesis, highlighting links between mitochondrial function and ion transport. These findings suggest that sulfate transport is integrated with broader cellular quality-control and metabolic networks.
sulfate transmembrane transporter activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| SLC26A2 | Diastrophic dysplasia, chondrodysplasia | Knockout mouse, patient-derived chondrocytes |
| SLC13A1 | Sulfate homeostasis disorders | Knockout mouse, kidney cell lines |
| SLC26A3 | Congenital chloride diarrhea | Intestinal organoids, knockout mice |
| SLC26A4 | Pendred syndrome | Knockout mouse, inner ear cell lines |
| SLC26A11 | Lysosomal sulfate transport defects | Lysosomal transport assays, knockout cells |
Diastrophic dysplasia and chondrodysplasias
Mutations in the sulfate transporter SLC26A2 (DTDST) cause diastrophic dysplasia and related chondrodysplasias. Karniski (2001) demonstrated a correlation between sulfate transport activity and the severity of the chondrodysplasia phenotype, showing that reduced sulfate uptake directly impairs cartilage development. This establishes GO:0015116 as a critical function in skeletal biology.
Inflammatory bowel disease and gut barrier
Sulfate transporters are expressed in the intestinal epithelium, where they contribute to electrolyte and sulfate homeostasis. Autophagy and gut microbiota interactions influence inflammatory responses in IBD, and impaired autophagy can affect epithelial barrier function. Although direct links between sulfate transport and IBD are still emerging, the interplay between ion transport and autophagy suggests a potential role.
Mitochondrial dysfunction and cancer
Mitochondrial respiratory chain deficiency inhibits lysosomal hydrolysis, which can alter cellular ion balance. PINK1 deficiency facilitates mitochondrial iron accumulation and colon tumorigenesis, indicating that mitochondrial ion transport pathways, potentially including sulfate transport, may contribute to cancer progression. These findings highlight the need for further research on sulfate transporters in mitochondrial and cancer biology.
From sulfate transmembrane transporter activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of SLC26A2 reduce sulfate transport? | CRISPR knockout in chondrocyte cell line |
| Does a point mutation in SLC26A2 affect transport activity? | Point mutation knock-in in HEK293 cells |
| Can tagged SLC13A1 be used to study localization? | Knock-in of fluorescent tag |
| Does overexpression of SHST1 increase sulfate uptake? | Overexpression in plant or yeast cells |
| What is the effect of SLC26A11 knockout on lysosomal function? | Knockout in HeLa cells |
| Can sulfate transport be measured in live cells? | Genetically encoded sulfate sensor |
How to Study the sulfate transmembrane transporter activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Radiolabeled sulfate uptake | Transport activity | Comparing wild-type and mutant transporters |
| Site-directed mutagenesis | Residue function | Identifying key amino acids in transport |
| Electrophysiology | Ion currents | Characterizing electrogenic transport |
| Fluorescent sulfate sensors | Real-time sulfate levels | Live-cell imaging of transport |
| CRISPR knockout screening | Gene essentiality for transport | Identifying novel regulators |
| RNA-seq | Transporter gene expression | Profiling sulfate transporters in tissues |
| Proteomics | Transporter protein abundance | Quantifying membrane transporters |
| Bioinformatics | Sequence and structure analysis | Predicting transporter function |
Transport assays using radioactive sulfate
Radiolabeled sulfate (35SO4(2-)) uptake assays are the gold standard for measuring sulfate transmembrane transporter activity. Cells expressing wild-type or mutant transporters are incubated with radiolabeled sulfate, and uptake is quantified by scintillation counting. This method directly measures the function of GO:0015116 and can be used to compare mutant variants.
Site-directed mutagenesis and electrophysiology
Site-directed mutagenesis of charged residues within transmembrane helices, combined with two-electrode voltage clamp or patch clamp, can reveal the molecular determinants of sulfate transport. Shelden et al. (2003) used this approach to identify interactions between charged amino acids in the plant sulfate transporter SHST1.
Fluorescent sulfate sensors and imaging
Genetically encoded fluorescent sensors for sulfate allow real-time monitoring of sulfate transport in live cells. These sensors can be targeted to specific organelles to study compartmentalized sulfate transport. Imaging approaches complement biochemical assays and provide spatial information.
CRISPR screening and functional genomics
CRISPR knockout libraries can be screened to identify genes that regulate sulfate transport or compensate for transporter loss. Such screens can uncover novel regulators of GO:0015116 and link them to disease pathways. Bioinformatics analysis of transport activity data can further prioritize candidate genes.
How CRISPR Can Be Used to Study GO:0015116 sulfate transmembrane transporter activity
Knockout
CRISPR knockout of sulfate transporter genes such as SLC26A2 or SLC13A1 can abolish sulfate transport activity, providing a clean background to study loss-of-function phenotypes. Knockout cell lines are valuable for measuring baseline sulfate uptake and for testing compensatory mechanisms.
Point Mutation
Point mutations identified in patients, such as those in SLC26A2, can be introduced into cell lines using CRISPR base editing or homology-directed repair to assess their impact on sulfate transport activity. This approach directly links genotype to function for GO:0015116.
Knock-in
Knock-in of epitope tags or fluorescent proteins into endogenous sulfate transporter loci allows visualization and purification of transporters without overexpression artifacts. Tagged knock-in models are useful for studying localization and trafficking.
Overexpression
Overexpression of sulfate transporters such as SHST1 or SLC13A1 in heterologous systems can enhance sulfate uptake and enable biochemical characterization. Overexpression models are also used to screen for inhibitors or activators of sulfate transport.
How EDITGENE Supports sulfate transmembrane transporter activity Research
Researchers studying sulfate transmembrane transporter activity-related genes often need to determine whether a candidate gene is causally involved in sulfate transport, disease phenotypes, or cellular stress responses. EDITGENE provides a comprehensive suite of CRISPR-based services to generate precisely engineered cell models, enabling functional validation of sulfate transporters and their regulators.
Contact EDITGENE today to design your custom CRISPR model for sulfate transmembrane transporter activity research.
Related Products
| Product name | Cat.No. | Species | Gene ID | |
|---|---|---|---|---|
| SLC26A4 Knockout HEK293 Cell Line | EDJ-KQ2080 | Human | 5172 | Details Get a Quote |
| SLC26A2 Knockout HEK293 Cell Line | EDJ-KQ2573 | Human | 1836 | Details Get a Quote |
| SLC26A3 Knockout HEK293 Cell Line | EDJ-KQ4476 | Human | 1811 | Details Get a Quote |
| SLC26A9 Knockout HEK293 Cell Line | EDJ-KQ6850 | Human | 115019 | Details Get a Quote |
| SLC26A1 Knockout HEK293 Cell Line | EDJ-KQ7191 | Human | 10861 | Details Get a Quote |
| SLC26A7 Knockout HEK293 Cell Line | EDJ-KQ7504 | Human | 115111 | Details Get a Quote |
| SLC26A8 Knockout HEK293 Cell Line | EDJ-KQ7564 | Human | 116369 | Details Get a Quote |
| SLC26A5 Knockout HEK293 Cell Line | EDJ-KQ15319 | Human | 375611 | Details Get a Quote |
| SLC26A6 Knockout HEK293 Cell Line | EDJ-KQ15320 | Human | 65010 | Details Get a Quote |
| SLC26A11 Knockout HEK293 Cell Line | EDJ-KQ15321 | Human | 284129 | Details Get a Quote |
| SLC26A1 Knockout HCT 116 Cell Line | EDJ-KQ32133 | Human | 10861 | Details Get a Quote |
| SLC26A6 Knockout A-549 Cell Line | EDJ-KQ46026 | Human | 65010 | Details Get a Quote |
| SLC26A6 Knockout HCT 116 Cell Line | EDJ-KQ46027 | Human | 65010 | Details Get a Quote |
| SLC26A6 Knockout HeLa Cell Line | EDJ-KQ46028 | Human | 65010 | Details Get a Quote |
| SLC26A11 Knockout A-549 Cell Line | EDJ-KQ46029 | Human | 284129 | Details Get a Quote |
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Frequently Asked Questions About sulfate transmembrane transporter activity
What is sulfate transmembrane transporter activity?
Sulfate transmembrane transporter activity (GO:0015116) is the molecular function that enables the transfer of sulfate ions (SO4(2-)) across a membrane, typically mediated by specialized transporter proteins.
What genes are involved in sulfate transmembrane transporter activity?
Key genes include SLC13A1, SLC26A2 (DTDST), SLC26A3, SLC26A4, SLC26A6, SLC26A11, and plant SHST1, among others.
What diseases are associated with sulfate transporter mutations?
Mutations in SLC26A2 cause diastrophic dysplasia and related chondrodysplasias; other sulfate transporters have been linked to metabolic and inflammatory conditions.
How is sulfate transport measured experimentally?
Common methods include radiolabeled sulfate uptake assays, electrophysiology, and fluorescent sulfate sensors.
What is the role of SLC26A2 in sulfate transport?
SLC26A2 (DTDST) is a sulfate/chloride exchanger that is critical for cartilage development; loss-of-function mutations reduce sulfate transport and cause chondrodysplasia.
Can CRISPR be used to study sulfate transporters?
Yes, CRISPR knockout, point mutation, knock-in and overexpression models allow precise functional dissection of sulfate transporter genes.
What is the difference between sulfate permease and sulfate transporter?
Sulfate permease activity is a synonym for sulfate transmembrane transporter activity (GO:0015116), referring to the same molecular function.
How is sulfate transport regulated in cells?
Regulation occurs at transcriptional, post-translational and trafficking levels, and can be influenced by autophagy and mitochondrial function.
What model systems are used to study sulfate transport?
Cell lines (e.g., HEK293, chondrocytes), knockout mice, plant models, and yeast heterologous expression systems are commonly used.
Why is sulfate transport important for human health?
Sulfate is required for sulfation of macromolecules, skeletal development, and detoxification; impaired transport leads to developmental disorders.
Conclusion
Sulfate transmembrane transporter activity (GO:0015116) is a fundamental molecular function that ensures sulfate availability for sulfation, sulfur metabolism and ion homeostasis. Dysregulation of sulfate transporters such as SLC26A2 causes developmental disorders, and emerging evidence links sulfate transport to autophagy, mitochondrial function and cancer. Continued research using CRISPR models, transport assays and bioinformatics will further illuminate the roles of these transporters in health and disease.
References
- 1. Larabi A et al.. 2020. New insights into the interplay between autophagy, gut microbiota and inflammatory responses in IBD.. Autophagy 16(1):38-51 PMID: 31286804
- 2. Foerster EG et al.. 2022. How autophagy controls the intestinal epithelial barrier.. Autophagy 18(1):86-103 PMID: 33906557
- 3. Fernandez-Mosquera L et al.. 2019. Mitochondrial respiratory chain deficiency inhibits lysosomal hydrolysis.. Autophagy 15(9):1572-1591 PMID: 30917721
- 4. Arcos M et al.. 2025. PINK1-deficiency facilitates mitochondrial iron accumulation and colon tumorigenesis.. Autophagy 21(4):737-753 PMID: 39512202
- 5. Markovich D. 2014. Na+-sulfate cotransporter SLC13A1.. Pflugers Arch 466(1):131-7 PMID: 24193406
- 7. Shelden MC et al.. 2003. Interactions between charged amino acid residues within transmembrane helices in the sulfate transporter SHST1.. Biochemistry 42(44):12941-9 PMID: 14596609
- 8. Karniski LP. 2001. Mutations in the diastrophic dysplasia sulfate transporter (DTDST) gene: correlation between sulfate transport activity and chondrodysplasia phenotype.. Hum Mol Genet 10(14):1485-90 PMID: 11448940
