GO:0001517 N-acetylglucosamine 6-O-sulfotransferase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0001517 defines the enzymatic activity that transfers sulfate from 3'-phosphoadenosine 5'-phosphosulfate (PAPS) to the 6-O position of N-acetyl-D-glucosamine, producing N-acetyl-D-glucosamine 6-sulfate and adenosine 3',5'-bisphosphate.
• This activity is essential for generating the 6-sulfo sialyl Lewis X epitope, a high-affinity ligand for L-selectin that directs lymphocyte homing to peripheral lymph nodes.
• The enzyme is encoded by CHST2 (GST-2) and CHST4 (GST-4) in humans, with CHST2 being the predominant N-acetylglucosamine 6-O-sulfotransferase in respiratory mucosa and lymphoid tissue.
• Loss of N-acetylglucosamine 6-O-sulfotransferase-1 (CHST2) in mice improves functional recovery after spinal cord injury, indicating a role in limiting axonal regeneration.
• Antithrombin-binding heparan sulfate, which depends on 6-O-sulfation, is ubiquitously expressed in epithelial cells and suppresses pancreatic tumorigenesis.
• Dysregulation of 6-O-sulfation is linked to cancer progression, including gastric cancer metastasis through GAL3ST1-mediated histone tyrosine sulfation.
Description
N-acetylglucosamine 6-O-sulfotransferase activity (GO:0001517) is a molecular function that catalyzes the transfer of a sulfate group from the universal sulfate donor 3'-phosphoadenosine 5'-phosphosulfate (PAPS) to the 6-O position of N-acetyl-D-glucosamine residues on glycoproteins and glycolipids. This modification is critical for the biosynthesis of sulfated carbohydrate ligands that mediate cell-cell recognition and signaling. The reaction produces N-acetyl-D-glucosamine 6-sulfate and adenosine 3',5'-bisphosphate, and it is a key step in the generation of the 6-sulfo sialyl Lewis X epitope, a high-affinity ligand for L-selectin. Researchers study this activity because it directly controls lymphocyte homing, inflammatory responses, and cancer progression. In lymphoid tissue, the enzyme is responsible for the 6-O-sulfation of core 2-branched O-glycans on high endothelial venules, which is required for L-selectin-mediated rolling and extravasation of lymphocytes. In respiratory mucosa, a distinct N-acetylglucosamine-6-O-sulfotransferase modifies mucin carbohydrate chains, influencing mucus properties and host defense. The enzyme is encoded by CHST2 and CHST4 in humans, and its activity is tightly regulated at the transcriptional and post-translational levels. Dysregulation of 6-O-sulfation has been implicated in spinal cord injury, pancreatic cancer, and gastric cancer metastasis, making it a target for therapeutic intervention and a biomarker for disease progression.
N-acetylglucosamine 6-O-sulfotransferase activity At A Glance
| GO ID | GO:0001517 |
|---|---|
| GO term | N-acetylglucosamine 6-O-sulfotransferase activity |
| Ontology | molecular_function |
| Synonym | N-acetylglucosamine 6-O-sulphotransferase activity |
| Major function | Transfer of sulfate from PAPS to the 6-O position of N-acetyl-D-glucosamine |
| Reaction | 3'-phosphoadenosine 5'-phosphosulfate + N-acetyl-D-glucosamine = adenosine 3',5'-bisphosphate + N-acetyl-D-glucosamine 6-sulfate |
| Substrates | PAPS and N-acetyl-D-glucosamine |
| Products | Adenosine 3',5'-bisphosphate and N-acetyl-D-glucosamine 6-sulfate |
| Cofactors | None required beyond PAPS |
| Localization | Golgi apparatus (as a type II transmembrane protein) |
| Enzymes | CHST2 (GST-2), CHST4 (GST-4) |
What Is GO:0001517?
N-acetylglucosamine 6-O-sulfotransferase activity is the catalysis of the reaction: 3'-phosphoadenosine 5'-phosphosulfate (PAPS) + N-acetyl-D-glucosamine = adenosine 3',5'-bisphosphate + N-acetyl-D-glucosamine 6-sulfate. In other words, it is an enzyme that adds a sulfate group to the sixth carbon position of N-acetylglucosamine, using PAPS as the sulfate donor. This activity is a type of sulfotransferase and is classified under molecular_function in the Gene Ontology.
Why Is N-acetylglucosamine 6-O-sulfotransferase activity Important in Cell Biology?
N-acetylglucosamine 6-O-sulfotransferase activity is essential for the biosynthesis of sulfated carbohydrate ligands that regulate lymphocyte trafficking, inflammation, and cancer progression. The 6-O-sulfation of N-acetylglucosamine on O-glycans and heparan sulfate creates binding sites for selectins and antithrombin, respectively, thereby controlling cell adhesion and coagulation. In the nervous system, this activity limits axonal regeneration after spinal cord injury, as its genetic deletion improves functional recovery in mice. In cancer, altered 6-O-sulfation contributes to tumorigenesis and metastasis, with recent studies linking it to pancreatic and gastric cancers. Therefore, understanding this enzymatic activity is critical for developing therapies that target glycan-mediated diseases.
• Required for L-selectin ligand biosynthesis and lymphocyte homing to peripheral lymph nodes.
• Modulates inflammatory responses by controlling leukocyte extravasation.
• Influences spinal cord injury recovery; CHST2 deficiency improves functional recovery in mice.
• Suppresses pancreatic tumorigenesis through antithrombin-binding heparan sulfate.
• Promotes gastric cancer metastasis via GAL3ST1-mediated histone tyrosine sulfation.
• Plays a role in musculocontractural Ehlers-Danlos syndrome through dermatan sulfate sulfation defects.
• Affects mucin properties in respiratory mucosa, impacting host defense.
• Serves as a potential biomarker for cancer and inflammatory diseases.
• Target for therapeutic intervention in lymphocyte-mediated diseases.
• Key enzyme for glycomics and glycoproteomics research.
Molecular Mechanism of N-acetylglucosamine 6-O-sulfotransferase activity
Substrate Recognition and Binding
In simple terms: The enzyme grabs PAPS and N-acetylglucosamine and brings them together.
N-acetylglucosamine 6-O-sulfotransferase specifically binds 3'-phosphoadenosine 5'-phosphosulfate (PAPS) and N-acetyl-D-glucosamine. The enzyme recognizes the N-acetyl group and the 6-hydroxyl of the sugar, positioning them for catalysis. The carboxyl-terminal region of CHST2 is important for activity, as truncation reduces enzymatic function.
Catalytic Transfer of Sulfate
In simple terms: The enzyme moves the sulfate group from PAPS onto the sugar.
The catalytic mechanism involves the transfer of the sulfonate group from PAPS to the 6-O position of N-acetyl-D-glucosamine, yielding N-acetyl-D-glucosamine 6-sulfate and adenosine 3',5'-bisphosphate. This reaction is characteristic of sulfotransferases and requires no additional cofactors beyond PAPS.
Product Release and Turnover
In simple terms: The enzyme lets go of the modified sugar and the leftover PAPS byproduct.
After catalysis, the products N-acetyl-D-glucosamine 6-sulfate and adenosine 3',5'-bisphosphate are released. The enzyme can then bind new substrates. The activity is measured in vitro using radiolabeled PAPS or by mass spectrometry.
Regulation by Carboxyl-Terminal Region
In simple terms: A tail on the enzyme controls how well it works.
The carboxyl-terminal region of N-acetylglucosamine 6-O-sulfotransferase-1 (CHST2) is critical for its activity. Deletion of this region significantly reduces enzymatic activity, suggesting it plays a role in substrate binding or protein stability.
Tissue-Specific Expression and Isoforms
In simple terms: Different tissues use different versions of the enzyme.
Two main isoforms exist: CHST2 (GST-2) and CHST4 (GST-4). CHST2 is expressed in respiratory mucosa and lymphoid tissue, while CHST4 is predominantly found in high endothelial venules. Both catalyze the same reaction but differ in tissue distribution and substrate specificity.
Key Genes Involved in GO:0001517 N-acetylglucosamine 6-O-sulfotransferase activity
The following genes encode enzymes with N-acetylglucosamine 6-O-sulfotransferase activity or are directly involved in its regulation and downstream effects.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CHST2 | Encodes N-acetylglucosamine 6-O-sulfotransferase-1 (GST-2) | Major enzyme in respiratory mucosa and lymphoid tissue; regulates L-selectin ligands |
| CHST4 | Encodes N-acetylglucosamine 6-O-sulfotransferase-2 (GST-4) | Expressed in high endothelial venules; involved in lymphocyte homing |
| CHST3 | Encodes chondroitin 6-O-sulfotransferase | Related sulfotransferase with different substrate specificity |
| CHST5 | Encodes N-acetylglucosamine 6-O-sulfotransferase-3 | May modify mucin-type glycans |
| CHST6 | Encodes N-acetylglucosamine 6-O-sulfotransferase-4 | Associated with macular corneal dystrophy |
| CHST7 | Encodes N-acetylglucosamine 6-O-sulfotransferase-5 | Involved in heparan sulfate biosynthesis |
| CHST1 | Encodes keratan sulfate galactose 6-O-sulfotransferase | Related enzyme in keratan sulfate pathway |
| GAL3ST1 | Encodes galactose-3-O-sulfotransferase 1 | Mediates histone tyrosine sulfation in gastric cancer |
| FUT7 | Fucosyltransferase 7 | Generates sialyl Lewis X epitope for L-selectin binding |
| B3GNT3 | Beta-1,3-N-acetylglucosaminyltransferase 3 | Extends core 1 O-glycans for 6-sulfation |
| GCNT1 | Glucosaminyl (N-acetyl) transferase 1 | Forms core 2 branches on O-glycans |
| SELPLG | P-selectin glycoprotein ligand-1 | Carries sulfated glycans for selectin binding |
| SELL | L-selectin | Receptor for 6-sulfo sialyl Lewis X |
| PAPSS1 | 3'-phosphoadenosine 5'-phosphosulfate synthase 1 | Produces PAPS for sulfation reactions |
| PAPSS2 | 3'-phosphoadenosine 5'-phosphosulfate synthase 2 | Alternative PAPS synthase |
| SLC35B2 | PAPS transporter | Transports PAPS into Golgi for sulfation |
| SLC35B3 | PAPS transporter | Alternative PAPS transporter |
| EXT1 | Exostosin glycosyltransferase 1 | Heparan sulfate biosynthesis, affects 6-O-sulfation |
How Is N-acetylglucosamine 6-O-sulfotransferase activity Regulated?
N-acetylglucosamine 6-O-sulfotransferase activity is regulated at multiple levels. Transcriptionally, CHST2 and CHST4 expression is controlled by tissue-specific transcription factors, including those responsive to inflammatory cytokines. The carboxyl-terminal region of CHST2 is essential for activity, and its deletion reduces enzymatic function. Post-translational modifications and Golgi localization also influence activity. Additionally, the availability of the sulfate donor PAPS, synthesized by PAPSS1 and PAPSS2 and transported into the Golgi by SLC35B2/B3, regulates the overall rate of sulfation. In cancer, GAL3ST1-mediated histone tyrosine sulfation can indirectly affect sulfotransferase pathways.
N-acetylglucosamine 6-O-sulfotransferase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CHST2 | Spinal cord injury | CHST2 knockout mouse |
| CHST2 | Lymphocyte homing disorders | CHST2 knockout mouse |
| CHST4 | Inflammatory diseases | CHST4 knockout mouse |
| GAL3ST1 | Gastric cancer metastasis | GAL3ST1 knockout or overexpression in gastric cancer cell lines |
| CHST2/CHST4 | Pancreatic tumorigenesis | Epithelial-specific knockout mouse |
Spinal Cord Injury and Axonal Regeneration
N-acetylglucosamine 6-O-sulfotransferase-1 (CHST2) deficiency in mice leads to better functional recovery after spinal cord injury. This suggests that 6-O-sulfation of N-acetylglucosamine on glycoproteins inhibits axonal regeneration, and targeting this activity could promote repair.
Cancer Progression and Metastasis
Antithrombin-binding heparan sulfate, which requires 6-O-sulfation, is ubiquitously expressed in epithelial cells and suppresses pancreatic tumorigenesis. In gastric cancer, GAL3ST1-mediated histone tyrosine sulfation induced by cancer-associated fibroblasts promotes metastasis, highlighting the role of sulfation in tumor progression.
Musculocontractural Ehlers-Danlos Syndrome
Mouse models of musculocontractural Ehlers-Danlos syndrome exhibit defects in dermatan sulfate sulfation, which may involve altered 6-O-sulfotransferase activity. This rare connective tissue disorder underscores the importance of sulfation in extracellular matrix integrity.
Inflammatory and Lymphocyte Homing Disorders
N-acetylglucosamine 6-O-sulfotransferase-1 regulates the expression of L-selectin ligands and lymphocyte homing. Dysregulation of this activity can lead to impaired immune surveillance or chronic inflammation.
From N-acetylglucosamine 6-O-sulfotransferase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does CHST2 loss improve recovery after spinal cord injury? | CHST2 knockout mouse |
| Does CHST2 regulate L-selectin ligand expression? | CHST2 knockout mouse and lymphoid tissue analysis |
| What is the role of the carboxyl-terminal region in CHST2 activity? | Site-directed mutagenesis and truncation constructs |
| Does 6-O-sulfation of heparan sulfate suppress pancreatic cancer? | Conditional knockout of CHST2/CHST4 in pancreatic epithelium |
| How does GAL3ST1-mediated sulfation affect gastric cancer metastasis? | GAL3ST1 overexpression or knockout in gastric cancer cells |
| Does CHST4 deficiency alter lymphocyte homing? | CHST4 knockout mouse |
How to Study the N-acetylglucosamine 6-O-sulfotransferase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Radiolabeled PAPS assay | Enzymatic activity of N-acetylglucosamine 6-O-sulfotransferase | In vitro enzyme kinetics |
| LC-MS/MS | Structure and quantity of sulfated glycans | Glycomics and glycoproteomics |
| qRT-PCR | mRNA expression of CHST2/CHST4 | Tissue-specific expression analysis |
| RNA-seq | Transcriptome-wide expression changes | Pathway analysis in disease models |
| CRISPR-Cas9 knockout | Gene function loss | Generating knockout cell lines and mice |
| Western blot | Protein expression and modification | Validating knockout or overexpression |
| Flow cytometry | L-selectin ligand expression on cell surface | Lymphocyte homing studies |
| Immunohistochemistry | Tissue localization of sulfated glycans | Cancer and inflammation studies |
Enzymatic Activity Assays
N-acetylglucosamine 6-O-sulfotransferase activity is measured using radiolabeled PAPS (35S-PAPS) and acceptor substrates such as N-acetyl-D-glucosamine or mucin-derived glycans. The transfer of radioactive sulfate to the acceptor is quantified by chromatography or scintillation counting.
Glycan Analysis by Mass Spectrometry
Mass spectrometry, including LC-MS/MS, is used to identify and quantify N-acetyl-D-glucosamine 6-sulfate on glycoproteins and glycolipids. This method provides structural details of sulfated glycans and can confirm the specific position of sulfation.
Gene Expression Analysis
Quantitative RT-PCR and RNA-seq are used to measure CHST2 and CHST4 mRNA levels in different tissues and disease models. This helps determine transcriptional regulation and tissue-specific expression patterns.
CRISPR-Cas9 Genome Editing
CRISPR-Cas9 is used to generate knockout cell lines and mouse models for CHST2, CHST4, and related genes. These models allow functional studies of 6-O-sulfation in lymphocyte homing, cancer, and spinal cord injury.
How CRISPR Can Be Used to Study GO:0001517 N-acetylglucosamine 6-O-sulfotransferase activity
Knockout
CRISPR-Cas9 knockout of CHST2 or CHST4 eliminates N-acetylglucosamine 6-O-sulfotransferase activity, allowing researchers to study its role in lymphocyte homing, spinal cord injury, and cancer. For example, CHST2 knockout mice show improved recovery after spinal cord injury.
Point Mutation
Point mutations can be introduced into the catalytic domain or carboxyl-terminal region of CHST2 to dissect structure-function relationships. This approach helps identify residues critical for substrate binding and catalysis.
Knock-in
Knock-in of tagged CHST2 or CHST4 (e.g., FLAG or GFP) enables localization and interaction studies. Knock-in of disease-associated mutations can model human disorders of sulfation.
Overexpression
Overexpression of CHST2 or CHST4 in cell lines increases 6-O-sulfation of glycans, which can be used to study downstream effects on cell adhesion, signaling, and tumorigenesis.
How EDITGENE Supports N-acetylglucosamine 6-O-sulfotransferase activity Research
Researchers studying N-acetylglucosamine 6-O-sulfotransferase activity-related genes often need to determine whether a candidate gene is causally involved in glycan-mediated processes such as lymphocyte homing, cancer progression, or neural regeneration. EDITGENE provides comprehensive CRISPR gene editing services to create precisely engineered cell models and animal models for functional validation.
Contact EDITGENE today to design your custom CRISPR model for N-acetylglucosamine 6-O-sulfotransferase activity research.
Related Products
| Product name | Cat.No. | Species | Gene ID | |
|---|---|---|---|---|
| CHST6 Knockout HEK293 Cell Line | EDJ-KQ5185 | Human | 4166 | Details Get a Quote |
| CHST1 Knockout HEK293 Cell Line | EDJ-KQ6274 | Human | 8534 | Details Get a Quote |
| CHST2 Knockout HEK293 Cell Line | EDJ-KQ6586 | Human | 9435 | Details Get a Quote |
| CHST3 Knockout HEK293 Cell Line | EDJ-KQ6597 | Human | 9469 | Details Get a Quote |
| CHST4 Knockout HEK293 Cell Line | EDJ-KQ6931 | Human | 10164 | Details Get a Quote |
| CHST5 Knockout HEK293 Cell Line | EDJ-KQ8072 | Human | 23563 | Details Get a Quote |
| CHST7 Knockout HEK293 Cell Line | EDJ-KQ12918 | Human | 56548 | Details Get a Quote |
| CHST6 Knockout HCT 116 Cell Line | EDJ-KQ28173 | Human | 4166 | Details Get a Quote |
| CHST7 Knockout A-549 Cell Line | EDJ-KQ42121 | Human | 56548 | Details Get a Quote |
| CHST7 Knockout HCT 116 Cell Line | EDJ-KQ42122 | Human | 56548 | Details Get a Quote |
| CHST3 Knockout HeLa Cell Line | EDJ-KQ29477 | Human | 9469 | Details Get a Quote |
| CHST2 Knockout HCT 116 Cell Line | EDJ-KQ30808 | Human | 9435 | Details Get a Quote |
| CHST3 Knockout A-549 Cell Line | EDJ-KQ30819 | Human | 9469 | Details Get a Quote |
| CHST3 Knockout HCT 116 Cell Line | EDJ-KQ30820 | Human | 9469 | Details Get a Quote |
| CHST4 Knockout HCT 116 Cell Line | EDJ-KQ31582 | Human | 10164 | Details Get a Quote |
Displaying Records 1 To 15 Of 28 Records
Frequently Asked Questions About N-acetylglucosamine 6-O-sulfotransferase activity
What is N-acetylglucosamine 6-O-sulfotransferase activity?
It is the enzymatic activity that transfers a sulfate group from PAPS to the 6-O position of N-acetyl-D-glucosamine, producing N-acetyl-D-glucosamine 6-sulfate.
What genes encode N-acetylglucosamine 6-O-sulfotransferase?
The main genes are CHST2 (GST-2) and CHST4 (GST-4) in humans.
What is the role of N-acetylglucosamine 6-O-sulfotransferase in lymphocyte homing?
It generates the 6-sulfo sialyl Lewis X epitope, a high-affinity ligand for L-selectin, which is required for lymphocyte rolling and homing to lymph nodes.
How is N-acetylglucosamine 6-O-sulfotransferase activity measured?
It is measured using radiolabeled PAPS assays or mass spectrometry to detect the transfer of sulfate to acceptor substrates.
What diseases are associated with N-acetylglucosamine 6-O-sulfotransferase?
It has been linked to spinal cord injury, pancreatic cancer, gastric cancer metastasis, and musculocontractural Ehlers-Danlos syndrome.
Can CRISPR be used to study N-acetylglucosamine 6-O-sulfotransferase?
Yes, CRISPR-Cas9 knockout, point mutation, knock-in, and overexpression models are widely used to study its function.
What is the reaction catalyzed by N-acetylglucosamine 6-O-sulfotransferase?
3'-phosphoadenosine 5'-phosphosulfate + N-acetyl-D-glucosamine = adenosine 3',5'-bisphosphate + N-acetyl-D-glucosamine 6-sulfate.
Where is N-acetylglucosamine 6-O-sulfotransferase located in the cell?
It is a Golgi-resident type II transmembrane protein.
What is the role of the carboxyl-terminal region in CHST2?
The carboxyl-terminal region is important for enzymatic activity; its deletion reduces function.
How does 6-O-sulfation affect cancer?
It can suppress pancreatic tumorigenesis through antithrombin-binding heparan sulfate, but also promote gastric cancer metastasis via GAL3ST1-mediated sulfation.
Conclusion
N-acetylglucosamine 6-O-sulfotransferase activity (GO:0001517) is a critical enzymatic function that regulates glycan-mediated cell adhesion, lymphocyte homing, and cancer progression. Its role in generating 6-sulfo sialyl Lewis X and antithrombin-binding heparan sulfate makes it a key target for understanding inflammatory and malignant diseases. With the help of CRISPR gene editing, researchers can now precisely manipulate CHST2, CHST4, and related genes to dissect their functions in health and disease. EDITGENE offers a full suite of services to accelerate this research, from knockout and knock-in models to library screening and bioinformatics.
References
- 1. Degroote S et al.. 1997. Characterization of an N-acetylglucosamine-6-O-sulfotransferase from human respiratory mucosa active on mucin carbohydrate chains.. J Biol Chem 272(47):29493-501 PMID: 9368010
- 2. Uchimura K et al.. 2004. N-acetylglucosamine 6-O-sulfotransferase-1 regulates expression of L-selectin ligands and lymphocyte homing.. J Biol Chem 279(33):35001-8 PMID: 15175329
- 3. Chen L et al.. 2004. Role of the carboxyl-terminal region in the activity of N-acetylglucosamine 6-o-sulfotransferase-1.. J Biochem 136(5):659-64 PMID: 15632306
- 4. Ito Z et al.. 2010. N-acetylglucosamine 6-O-sulfotransferase-1-deficient mice show better functional recovery after spinal cord injury.. J Neurosci 30(17):5937-47 PMID: 20427653
- 5. Clausen TM et al.. 2025. Antithrombin-binding heparan sulfate is ubiquitously expressed in epithelial cells and suppresses pancreatic tumorigenesis.. J Clin Invest 135(22) PMID: 40924474
- 6. Lu Y et al.. 2026. GAL3ST1-Mediated Histone Tyrosine Sulfation Induced by Cancer-Associated Fibroblasts Promotes Gastric Cancer Metastasis.. Cancer Res 86(10):2429-2446 PMID: 41686426
- 7. Yoshizawa T et al.. 2023. Mouse Models of Musculocontractural Ehlers-Danlos Syndrome.. Genes (Basel) 14(2) PMID: 36833362
- 8. Bowman KG et al.. 1998. Identification of an N-acetylglucosamine-6-0-sulfotransferase activity specific to lymphoid tissue: an enzyme with a possible role in lymphocyte homing.. Chem Biol 5(8):447-60 PMID: 9710564
