GO:1905575 ganglioside GM3 binding: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1905575 ganglioside GM3 binding is a molecular_function term defined as binding to ganglioside GM3, a sialylated glycosphingolipid.
• GM3 binding is mediated by carbohydrate-recognition domains, including the epidermal growth factor receptor (EGFR) and CD33-related siglecs.
• GM3 binding can suppress receptor tyrosine kinase signaling, such as EGFR and IGF-1 receptor activation, thereby inhibiting cell motility and proliferation.
• GM3 is enriched in membrane microdomains (lipid rafts), and its distribution is cell-density dependent in melanoma cells.
• Pathogens exploit GM3 binding for cell entry, as shown for Clostridium botulinum type C hemagglutinin.
• GM3-binding peptides can be used for selective intracellular delivery via caveolae/raft-mediated endocytosis.
Description
Ganglioside GM3 binding (GO:1905575) is a molecular function that describes the selective interaction of proteins or peptides with the sialylated glycosphingolipid GM3. GM3 is a ubiquitous component of the plasma membrane, where it concentrates in lipid rafts and participates in cell signaling, adhesion, and recognition. The binding event is central to both physiological processes, such as receptor tyrosine kinase regulation, and pathological conditions, including metabolic syndrome and cancer. Researchers study GM3 binding to understand how glycosphingolipid-protein interactions modulate signal transduction, and to develop targeted therapeutics and delivery tools. This article integrates authoritative QuickGO annotation with verified PubMed literature to provide a research-grade overview of GO:1905575, its mechanisms, key genes, and experimental approaches.
ganglioside GM3 binding At A Glance
| GO ID | GO:1905575 |
|---|---|
| GO term | ganglioside GM3 binding |
| Ontology | molecular_function |
| Synonym | none |
| Definition | Binding to ganglioside GM3. |
| Major function | Mediates protein-carbohydrate interactions with GM3, influencing cell signaling, adhesion, and pathogen entry. |
| Related molecules | EGFR, IGF-1R, CD33-related siglecs, TLR4, caveolin, Rac1 |
| Cellular context | Plasma membrane, lipid rafts, caveolae |
| Disease relevance | Metabolic syndrome, cancer, melanoma, keratinocyte dysfunction, bacterial intoxication |
What Is GO:1905575?
According to the Gene Ontology, GO:1905575 ganglioside GM3 binding is defined as the binding to ganglioside GM3. This molecular function encompasses any interaction between a protein or macromolecule and the GM3 ganglioside, a sialic acid-containing glycosphingolipid. The term is used to annotate gene products that physically associate with GM3, often through carbohydrate-binding domains, and it is distinct from enzymatic activities that modify GM3.
Why Is ganglioside GM3 binding Important in Cell Biology?
GM3 binding is important because it links glycosphingolipid metabolism to fundamental cellular processes such as growth factor signaling, immune recognition, and host-pathogen interactions. Dysregulation of GM3 binding contributes to insulin resistance, cancer progression, and impaired wound healing, making it a potential therapeutic target. Moreover, understanding GM3 binding enables the design of GM3-based drug delivery systems and diagnostic tools.
• Regulates receptor tyrosine kinase signaling, including EGFR and IGF-1R, affecting cell proliferation and motility.
• Modulates Toll-like receptor 4 (TLR4) signaling in metabolic syndrome and inflammation.
• Mediates pathogen entry, such as Clostridium botulinum type C hemagglutinin binding to GM3.
• Enables selective intracellular delivery of therapeutic peptides via caveolae/raft-mediated endocytosis.
• Influences melanoma cell behavior through cell-density-dependent GM3 membrane distribution.
• Serves as a recognition target for CD33-related siglecs in immune regulation.
• Plays a role in glucose-induced suppression of keratinocyte motility, relevant to diabetic wound healing.
• Provides a model for studying lipid raft dynamics and membrane microdomain organization.
• Offers a basis for developing GM3-binding probes for imaging and diagnostics.
• Highlights the importance of glycosylation in receptor function and signaling.
Molecular Mechanism of ganglioside GM3 binding
GM3 as a Membrane Receptor Component
In simple terms: GM3 sits in the cell membrane and acts like a docking site for certain proteins.
Ganglioside GM3 is a sialylated glycosphingolipid that is enriched in the outer leaflet of the plasma membrane, particularly in lipid rafts and caveolae. Its carbohydrate headgroup, containing sialic acid, is recognized by specific protein domains. The membrane distribution of GM3 is dynamic and can be influenced by cell density, as observed in melanoma cells. This spatial organization is critical for GM3 to function as a binding partner in signaling events.
Protein Domains That Recognize GM3
In simple terms: Certain proteins have specialized pockets that fit the sugar part of GM3.
GM3 binding is mediated by carbohydrate-recognition domains found in various proteins. The epidermal growth factor receptor (EGFR) requires glycosylation for GM3 binding, and this interaction suppresses EGFR activation. CD33-related siglecs also exhibit ganglioside binding patterns, with some showing specificity for GM3. Additionally, the Clostridium botulinum type C hemagglutinin binds GM3 to affect cell morphology and viability. These examples illustrate the diversity of GM3-binding proteins.
Consequences for Signal Transduction
In simple terms: When a protein binds GM3, it can switch off or change cellular signals.
GM3 binding can inhibit receptor tyrosine kinase signaling. For instance, GM3 binding to EGFR suppresses its activation, thereby modulating downstream pathways. Similarly, GM3 mediates glucose-induced suppression of IGF-1 receptor-Rac1 activation, inhibiting keratinocyte motility. In the context of metabolic syndrome, GM3 molecular species interact with Toll-like receptor 4 (TLR4), influencing inflammatory signaling. These events demonstrate how GM3 binding acts as a regulatory switch in cell signaling.
Pathogen Exploitation of GM3 Binding
In simple terms: Some bacteria use GM3 as a doorway to enter cells.
Pathogens can exploit GM3 binding for cellular entry and toxicity. Clostridium botulinum type C hemagglutinin binds to ganglioside GM3, affecting the morphology and viability of cultured mammalian cells. This interaction highlights the role of GM3 as a host receptor for bacterial toxins. Understanding these mechanisms can inform the development of anti-toxin therapies.
Therapeutic Exploitation: GM3-Binding Peptides
In simple terms: Scientists can use GM3-binding peptides to deliver drugs into cells.
GM3-binding peptides have been developed for selective intracellular delivery. A study showed that a GM3-binding peptide can be internalized through caveolae/raft-mediated endocytosis, providing a potential strategy for targeted drug delivery. This approach leverages the natural trafficking of GM3 in membrane microdomains. Such tools are valuable for both research and therapeutic applications.
Key Genes Involved in GO:1905575 ganglioside GM3 binding
The following genes and proteins are directly implicated in ganglioside GM3 binding or its downstream effects, based on verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| EGFR | Binds GM3; glycosylation required for interaction; GM3 suppresses EGFR activation | Receptor tyrosine kinase signaling; cancer |
| IGF1R | Mediates glucose-induced suppression via GM3; regulates Rac1 activation | Keratinocyte motility; diabetes |
| TLR4 | Interacts with GM3 molecular species; involved in metabolic syndrome | Inflammation; insulin resistance |
| CD33 | CD33-related siglec; binds gangliosides including GM3 | Immune regulation; siglec biology |
| SIGLEC7 | CD33-related siglec; ganglioside binding pattern | Immune checkpoint; cancer |
| SIGLEC9 | CD33-related siglec; ganglioside binding pattern | Immune regulation |
| CAV1 | Caveolin-1; component of caveolae; involved in GM3-binding peptide uptake | Endocytosis; drug delivery |
| RAC1 | Small GTPase; downstream of IGF-1R; suppressed by GM3 | Cell motility; cytoskeleton |
| B3GALT4 | Beta-1,3-galactosyltransferase; involved in GM3 synthesis | Ganglioside biosynthesis |
| ST3GAL5 | GM3 synthase; catalyzes GM3 synthesis | Ganglioside metabolism |
| HEXA | Hexosaminidase A; degrades GM3 | Lysosomal storage disorders |
| HEXB | Hexosaminidase B; degrades GM3 | Lysosomal storage disorders |
| B4GALNT1 | GM2/GD2 synthase; downstream of GM3 | Ganglioside biosynthesis |
| UGCG | Glucosylceramide synthase; first step in ganglioside synthesis | Sphingolipid metabolism |
| CST | Clostridium botulinum type C hemagglutinin; binds GM3 | Pathogen-host interaction |
| NEU3 | Sialidase; hydrolyzes GM3 | Ganglioside catabolism |
| GM3S | Alternative name for ST3GAL5 | Ganglioside synthesis |
How Is ganglioside GM3 binding Regulated?
The binding of GM3 to its partners is regulated by the availability and distribution of GM3 in the membrane, which can be influenced by cell density and metabolic state. For example, glucose levels can modulate GM3-mediated suppression of IGF-1 receptor signaling. Additionally, glycosylation of receptors such as EGFR is required for GM3 binding, adding another layer of regulation. The lipid raft environment and caveolae-mediated endocytosis also control the dynamics of GM3 interactions.
ganglioside GM3 binding and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| TLR4 | Metabolic syndrome, inflammation | Knockout mice, point mutation of GM3-binding site |
| EGFR | Cancer, melanoma | Knock-in of glycosylation-deficient EGFR, KO of GM3 synthase |
| IGF1R | Diabetes, wound healing | Keratinocyte-specific KO, overexpression of GM3-binding peptide |
| CD33 | Immune disorders | Siglec KO cell lines, point mutation of carbohydrate-binding domain |
| CST | Botulism | Knock-in of hemagglutinin in mammalian cells, GM3-binding assay |
Metabolic Syndrome and Insulin Resistance
GM3 ganglioside molecular species interact with Toll-like receptor 4 (TLR4), contributing to inflammation and insulin resistance in metabolic syndrome. This binding event links glycosphingolipid metabolism to systemic metabolic dysfunction, making GM3 a potential therapeutic target.
Cancer and Melanoma
In melanoma cells, GM3 membrane distribution is cell-density dependent, affecting cell behavior and signaling. GM3 binding to EGFR suppresses receptor activation, which can inhibit tumor cell proliferation. Dysregulated GM3 binding may therefore influence cancer progression.
Keratinocyte Motility and Wound Healing
Glucose-induced suppression of IGF-1 receptor-Rac1 activation via GM3 inhibits keratinocyte motility, a process relevant to diabetic wound healing. This highlights the role of GM3 binding in skin biology and tissue repair.
Bacterial Intoxication
Clostridium botulinum type C hemagglutinin binds to GM3, affecting cell morphology and viability. This interaction is a key step in bacterial pathogenesis and a target for anti-toxin strategies.
From ganglioside GM3 binding-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of GM3 binding affect EGFR signaling? | EGFR point-mutation (glycosylation site) knock-in cell line |
| What is the role of GM3 in metabolic syndrome? | TLR4 knockout mouse, GM3 synthase knockout mouse |
| How does GM3 binding mediate pathogen entry? | Clostridium botulinum hemagglutinin knock-in in HeLa cells |
| Can GM3-binding peptides deliver drugs? | Overexpression of GM3-binding peptide in caveolae-rich cells |
| Does GM3 distribution change with cell density? | Melanoma cell lines with tagged GM3 (fluorescent probe) |
| What genes regulate GM3 synthesis? | CRISPR knockout library screening for ganglioside biosynthesis genes |
How to Study the ganglioside GM3 binding Process
| Method | What It Measures | Typical Application |
|---|---|---|
| TLC overlay | Direct binding of proteins to GM3 | Identifying GM3-binding proteins |
| Surface plasmon resonance | Binding affinity and kinetics | Characterizing siglec-GM3 interactions |
| Fluorescence microscopy | Membrane distribution and internalization | Visualizing GM3 in melanoma cells |
| Flow cytometry | Cell surface GM3 levels | Quantifying GM3 expression |
| CRISPR knockout screening | Genes required for GM3 binding | Discovering novel regulators |
| Co-immunoprecipitation | Protein complexes with GM3 | Identifying GM3-binding partners |
| Endocytosis assays | Uptake of GM3-binding peptides | Drug delivery studies |
Glycolipid Overlay Assays
Thin-layer chromatography (TLC) overlay assays using labeled proteins or peptides can detect direct binding to GM3. This method is useful for identifying GM3-binding proteins and characterizing specificity.
Surface Plasmon Resonance (SPR)
SPR measures real-time binding kinetics between GM3 and proteins. It provides quantitative data on affinity and kinetics, as demonstrated for CD33-related siglecs.
Fluorescence Microscopy and Imaging
Fluorescently labeled GM3 or GM3-binding peptides can be used to visualize membrane distribution and internalization. This approach revealed cell-density-dependent GM3 distribution in melanoma cells and caveolae-mediated uptake.
CRISPR Screening
Genome-wide CRISPR knockout screens can identify genes required for GM3 binding and downstream signaling. This is particularly useful for discovering novel regulators of ganglioside metabolism and function.
How CRISPR Can Be Used to Study GO:1905575 ganglioside GM3 binding
Knockout
CRISPR knockout of genes involved in GM3 synthesis (e.g., ST3GAL5) or binding (e.g., EGFR) can abolish GM3 binding and its downstream effects. Such models are essential to establish causality in signaling pathways.
Point Mutation
Point mutations can be introduced into the carbohydrate-binding domains of GM3-binding proteins to dissect specific interactions. For example, mutating glycosylation sites on EGFR prevents GM3 binding, allowing separation of binding-dependent and independent functions.
Knock-in
Knock-in of tagged or fluorescently labeled GM3-binding proteins enables real-time tracking of localization and dynamics. This approach can be used to study membrane microdomain association.
Overexpression
Overexpression of GM3-binding peptides or proteins can enhance GM3-mediated effects, such as increased drug delivery or altered signaling. This is useful for gain-of-function studies.
How EDITGENE Supports ganglioside GM3 binding Research
Researchers studying ganglioside GM3 binding-related genes often need to determine whether a candidate gene is causally involved in GM3 interactions, signaling, or disease. EDITGENE provides comprehensive CRISPR-based services to create precise cellular models for such investigations.
Contact EDITGENE today to design your custom CRISPR model for ganglioside GM3 binding research.
Frequently Asked Questions About ganglioside GM3 binding
What is ganglioside GM3 binding?
Ganglioside GM3 binding (GO:1905575) is a molecular function defined as the binding to ganglioside GM3, a sialylated glycosphingolipid found in cell membranes.
What genes are involved in ganglioside GM3 binding?
Key genes include EGFR, IGF1R, TLR4, CD33, and ST3GAL5, among others.
How does GM3 binding affect cell signaling?
GM3 binding can suppress receptor tyrosine kinase signaling, such as EGFR and IGF-1R, thereby inhibiting cell proliferation and motility.
What diseases are associated with ganglioside GM3 binding?
GM3 binding is linked to metabolic syndrome, cancer, melanoma, keratinocyte dysfunction, and bacterial intoxication.
What is the role of GM3 in metabolic syndrome?
GM3 molecular species interact with TLR4, contributing to inflammation and insulin resistance in metabolic syndrome.
How can I study ganglioside GM3 binding in the lab?
Common methods include TLC overlay assays, surface plasmon resonance, fluorescence microscopy, and CRISPR screening.
What are GM3-binding peptides used for?
GM3-binding peptides can be used for selective intracellular delivery via caveolae/raft-mediated endocytosis.
Is GM3 binding involved in pathogen entry?
Yes, Clostridium botulinum type C hemagglutinin binds GM3 to affect cell morphology and viability.
What cell models are available for GM3 binding research?
Knockout, point mutation, knock-in, and overexpression cell models can be generated using CRISPR technology.
How does cell density affect GM3 distribution?
In melanoma cells, GM3 membrane distribution is cell-density dependent, influencing its availability for binding.
Conclusion
Ganglioside GM3 binding (GO:1905575) is a critical molecular function that mediates diverse cellular processes, from receptor tyrosine kinase regulation to pathogen entry. Its involvement in metabolic syndrome, cancer, and wound healing underscores its biomedical importance. By leveraging CRISPR-based models and advanced screening methods, researchers can further dissect the mechanisms and therapeutic potential of GM3 binding. EDITGENE offers a comprehensive suite of services to support these investigations.
References
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- 2. Matsubara T et al.. 2017. Selective Intracellular Delivery of Ganglioside GM3-Binding Peptide through Caveolae/Raft-Mediated Endocytosis.. Biomacromolecules 18(2):355-362 PMID: 28051846
- 3. Murate M et al.. 2023. Cell density-dependent membrane distribution of ganglioside GM3 in melanoma cells.. Cell Mol Life Sci 80(6):167 PMID: 37249637
- 4. Murate M et al.. 2026. Gangliosides and Membrane Microdomains.. Methods Mol Biol 3035:369-383 PMID: 42613535
- 5. Rapoport E et al.. 2003. Ganglioside binding pattern of CD33-related siglecs.. Bioorg Med Chem Lett 13(4):675-8 PMID: 12639556
- 6. Dam DHM et al.. 2017. Ganglioside GM3 Mediates Glucose-Induced Suppression of IGF-1 Receptor-Rac1 Activation to Inhibit Keratinocyte Motility.. J Invest Dermatol 137(2):440-448 PMID: 27729281
- 7. Wang XQ et al.. 2001. Epidermal growth factor receptor glycosylation is required for ganglioside GM3 binding and GM3-mediated suppression [correction of suppresion] of activation.. Glycobiology 11(7):515-22 PMID: 11447130
- 8. Sugawara Y et al.. 2015. Clostridium botulinum type C hemagglutinin affects the morphology and viability of cultured mammalian cells via binding to the ganglioside GM3.. FEBS J 282(17):3334-47 PMID: 26077172
