GO:0019809 spermidine binding: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0019809 spermidine binding is a molecular_function term defined as binding to spermidine, N-(3-aminopropyl)-1,4-diaminobutane.
• Spermidine binding proteins include PotF, spermidine synthase, spermidine dehydrogenase, and olfactory receptors, as shown by structural and biochemical studies.
• Spermidine binding regulates diverse processes such as DNA sensing, inflammation, tumor pyroptosis, and oocyte quality.
• Altered spermidine binding contributes to cancer, inflammation, and reproductive aging, making it a therapeutic target.
• CRISPR knockout, point mutation, knock-in, and overexpression models enable functional dissection of spermidine-binding proteins.
• EDITGENE provides end-to-end CRISPR services including library screening and bioinformatics for spermidine binding research.
Description
Spermidine binding (GO:0019809) is a molecular function that describes the selective interaction of a protein or biomolecule with spermidine, a naturally occurring polyamine. Spermidine is involved in numerous cellular processes, including cell growth, proliferation, and stress responses. The ability of proteins to bind spermidine is critical for its biological roles, as it often mediates substrate recognition, allosteric regulation, or structural stabilization. Understanding spermidine binding at the molecular level is therefore essential for deciphering polyamine biology and its implications in health and disease. Recent studies have highlighted the importance of spermidine binding in contexts such as tumor progression, inflammation, and DNA sensing. For example, spermidine binding to MYO6 enhances endocytosis and inhibits tumor pyroptosis, while polyamine metabolism influences B-to-Z DNA transition and cGAS activity. These findings underscore the need for precise tools to study spermidine-binding proteins. This article provides a comprehensive overview of GO:0019809, covering its definition, mechanisms, key genes, disease relevance, and research methodologies, with a focus on CRISPR-based approaches for functional validation.
spermidine binding At A Glance
| GO ID | GO:0019809 |
|---|---|
| GO term | spermidine binding |
| Ontology | molecular_function |
| Synonym | none |
| Major function | Binding to spermidine, a polyamine involved in cell growth, proliferation, and stress responses |
| Definition | Binding to spermidine, N-(3-aminopropyl)-1,4-diaminobutane. |
| Related proteins | PotF, spermidine synthase, spermidine dehydrogenase, olfactory receptors |
| Disease relevance | Cancer, inflammation, reproductive aging, and DNA sensing disorders |
What Is GO:0019809?
According to the Gene Ontology, GO:0019809 spermidine binding is defined as the binding to spermidine, N-(3-aminopropyl)-1,4-diaminobutane. In other words, it is the molecular function of selectively and non-covalently interacting with spermidine, a polyamine involved in various cellular processes. This term is used to annotate gene products that exhibit this binding activity, which may be part of transport, enzymatic, or regulatory functions.
Why Is spermidine binding Important in Cell Biology?
Spermidine binding is important because spermidine is a ubiquitous polyamine that regulates fundamental cellular processes, including gene expression, translation, and autophagy. Proteins that bind spermidine often mediate its transport, synthesis, or degradation, and their dysfunction is linked to various diseases. For instance, spermidine binding to MYO6 promotes endocytosis and inhibits pyroptosis in tumors, while polyamine metabolism controls cGAS activity and DNA sensing. Moreover, spermidine supplementation improves oocyte quality in aged porcine oocytes, and spermidine restricts neonatal inflammation by shaping myeloid-derived suppressor cells. Thus, understanding spermidine binding mechanisms can reveal new therapeutic targets and biomarkers.
• Spermidine binding regulates DNA sensor cGAS activity and innate immunity.
• Spermidine binding to MYO6 inhibits tumor pyroptosis, promoting cancer progression.
• Spermidine binding influences neonatal inflammation via myeloid-derived suppressor cells.
• Spermidine binding is critical for oocyte quality and postovulatory aging.
• Spermidine binding proteins like PotF are model systems for studying polyamine transport.
• Olfactory receptors bind spermidine as an odorant, linking binding to sensory perception.
• Spermidine dehydrogenase binds spermidine for its catabolism, affecting polyamine homeostasis.
• Spermidine synthase binds spermidine as a product, with feedback inhibition by decarboxylated S-adenosylhomocysteine.
• Dysregulated spermidine binding is implicated in cancer, inflammation, and aging.
• CRISPR-based models enable precise interrogation of spermidine binding functions.
Molecular Mechanism of spermidine binding
Spermidine Recognition and Binding Pocket
In simple terms: Proteins have a specific pocket that fits spermidine like a lock and key.
Spermidine binding typically occurs in a defined binding pocket that recognizes the polyamine's positive charges and length. Structural studies of the putrescine binding protein PotF show that fine-tuning of binding modes allows discrimination between putrescine and spermidine. Similarly, the Pseudomonas aeruginosa spermidine dehydrogenase features a novel heme-binding fold that accommodates spermidine for oxidation. These examples illustrate how proteins achieve specificity for spermidine through electrostatic interactions and hydrogen bonding.
Conformational Changes upon Binding
In simple terms: When spermidine binds, the protein can change shape to perform its function.
Binding of spermidine often induces conformational changes that activate or inhibit protein function. For instance, spermidine binding to MYO6 enhances its endocytic activity, leading to inhibition of tumor pyroptosis. In the case of human spermidine synthase, binding of the product spermidine or the inhibitor decarboxylated S-adenosylhomocysteine modulates enzyme activity through structural rearrangements. These dynamic changes are crucial for signal transduction and metabolic regulation.
Cofactors and Catalytic Mechanism
In simple terms: Some spermidine-binding proteins use helper molecules to carry out reactions.
Spermidine dehydrogenase from Pseudomonas aeruginosa is a polyamine oxidase with a heme cofactor that catalyzes the oxidation of spermidine. This enzyme binds spermidine and transfers electrons to the heme, demonstrating a catalytic role for spermidine binding. In contrast, spermidine synthase binds spermidine as a product and uses decarboxylated S-adenosylmethionine as a substrate, with inhibition by decarboxylated S-adenosylhomocysteine. These examples highlight the diversity of cofactors and mechanisms associated with spermidine binding.
Regulation of Spermidine Binding
In simple terms: Cells control how much spermidine binds to proteins to keep things balanced.
Spermidine binding can be regulated by cellular polyamine levels, which are influenced by synthesis, degradation, and transport. For example, polyamine metabolism controls B-to-Z DNA transition and cGAS activity, affecting DNA sensing. Additionally, spermidine supplementation alters oocyte quality, suggesting that availability of spermidine modulates binding to target proteins. Feedback inhibition of spermidine synthase by decarboxylated S-adenosylhomocysteine further fine-tunes spermidine levels.
Physiological Roles of Spermidine Binding
In simple terms: Spermidine binding helps cells grow, fight infections, and respond to stress.
Spermidine binding is involved in diverse physiological processes. In neonatal inflammation, spermidine shapes polymorphonuclear myeloid-derived suppressor cells to restrict inflammation. In cancer, spermidine binding to MYO6 promotes endocytosis and inhibits pyroptosis, supporting tumor survival. In reproduction, spermidine enhances the quality of postovulatory aged porcine oocytes. These roles underscore the broad impact of spermidine binding on health and disease.
Key Genes Involved in GO:0019809 spermidine binding
The following genes and proteins are key players in spermidine binding, as supported by structural, biochemical, and functional studies.
| Gene | Major Role | Research Relevance |
|---|---|---|
| PotF | Periplasmic putrescine/spermidine binding protein | Model for studying polyamine binding specificity |
| MYO6 | Myosin motor protein; binds spermidine to enhance endocytosis | Inhibits tumor pyroptosis; cancer target |
| SPDS | Spermidine synthase; binds spermidine as product | Feedback inhibition by decarboxylated S-adenosylhomocysteine |
| SpdH | Spermidine dehydrogenase; oxidizes spermidine | Novel heme-binding fold; polyamine catabolism |
| OR5AN1 | Olfactory receptor; binds spermidine as odorant | Amine odorant perception |
| cGAS | DNA sensor; regulated by polyamine metabolism | B-to-Z DNA transition and immune sensing |
| PMN-MDSC | Myeloid-derived suppressor cells; shaped by spermidine | Neonatal inflammation restriction |
| Oocyte proteins | Spermidine-binding proteins in oocytes | Postovulatory aging and quality |
| Spermidine synthase (other species) | Enzyme that produces spermidine | Target for polyamine pathway inhibitors |
| Spermidine dehydrogenase (other species) | Enzyme that degrades spermidine | Potential antimicrobial target |
| PotF homologs | Polyamine transport | Structural studies of binding modes |
| MYO6 mutants | Altered spermidine binding | Cancer and endocytosis research |
| cGAS mutants | Altered DNA sensing | Autoimmune and inflammatory diseases |
| SPDS mutants | Altered spermidine synthesis | Cancer and metabolic disorders |
| OR5AN1 mutants | Altered odorant binding | Sensory perception studies |
| PMN-MDSC markers | Spermidine-responsive | Inflammation and immune regulation |
How Is spermidine binding Regulated?
Spermidine binding is regulated at multiple levels. Cellular spermidine levels are controlled by synthesis, degradation, and transport, which in turn affect binding to target proteins. For example, polyamine metabolism controls B-to-Z DNA transition and cGAS activity, thereby regulating DNA sensing. Spermidine synthase is feedback-inhibited by decarboxylated S-adenosylhomocysteine, which reduces spermidine production and potentially its binding to downstream effectors. Additionally, spermidine supplementation can enhance oocyte quality, suggesting that exogenous spermidine can modulate binding events. In inflammation, spermidine shapes myeloid-derived suppressor cells, indicating that immune signals can influence spermidine binding.
spermidine binding and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| MYO6 | Cancer (inhibits pyroptosis) | Knockout and overexpression in cancer cell lines |
| cGAS | Autoimmune/inflammatory diseases | Point mutation and knockout in immune cells |
| SPDS | Cancer, metabolic disorders | Knockout and point mutation in cancer cells |
| PMN-MDSC | Neonatal inflammation | Knockout and overexpression in mouse models |
| Oocyte proteins | Reproductive aging | Knockout and overexpression in porcine oocytes |
Cancer
Spermidine binding plays a role in cancer progression. Spermidine binding to MYO6 enhances endocytosis and inhibits tumor pyroptosis, promoting tumor cell survival. Polyamine metabolism, which affects spermidine availability, controls cGAS activity and DNA sensing, with implications for cancer immunity. Targeting spermidine binding proteins could therefore be a therapeutic strategy.
Inflammation
Spermidine binding is involved in restricting neonatal inflammation by shaping polymorphonuclear myeloid-derived suppressor cells. This suggests that modulating spermidine binding could help control inflammatory responses in neonates and possibly other inflammatory conditions.
Reproductive Aging
Spermidine supplementation enhances the quality of postovulatory aged porcine oocytes, indicating that spermidine binding is important for oocyte health and may counteract reproductive aging. This has implications for fertility treatments.
DNA Sensing Disorders
Polyamine metabolism controls B-to-Z DNA transition to orchestrate DNA sensor cGAS activity, linking spermidine binding to autoimmune and inflammatory diseases. Dysregulation of this process could contribute to cGAS-related pathologies.
From spermidine binding-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of spermidine binding affect tumor growth? | MYO6 knockout in cancer cell lines |
| How does spermidine binding regulate DNA sensing? | cGAS point mutation in immune cells |
| What is the effect of spermidine binding on inflammation? | PMN-MDSC knockout in mice |
| Can spermidine binding improve oocyte quality? | Overexpression of spermidine-binding proteins in oocytes |
| How does spermidine binding affect enzyme activity? | SPDS knock-in with tagged spermidine binding site |
| What is the structural basis of spermidine binding? | PotF point mutations and crystallography |
How to Study the spermidine binding Process
| Method | What It Measures | Typical Application |
|---|---|---|
| X-ray crystallography | 3D structure of protein-spermidine complex | Binding pocket analysis |
| ITC | Binding affinity and thermodynamics | Quantify spermidine binding |
| SPR | Binding kinetics | Real-time interaction analysis |
| CRISPR knockout screen | Genes affecting spermidine binding phenotypes | Identify novel regulators |
| RNA-seq | Transcriptional changes | Downstream effects of spermidine |
| Proteomics | Protein expression and modifications | Global effects of spermidine binding |
| Fluorescence microscopy | Localization of spermidine-binding proteins | Cellular imaging |
| Site-directed mutagenesis | Specific residues in binding | Validate binding pocket |
Structural Biology
X-ray crystallography and cryo-EM can resolve spermidine binding pockets and conformational changes. For example, structures of PotF and spermidine dehydrogenase revealed fine details of spermidine binding.
Biochemical Assays
Isothermal titration calorimetry (ITC) and surface plasmon resonance (SPR) measure binding affinity and kinetics. These methods have been used to study spermidine binding to spermidine synthase and its inhibition.
CRISPR Screening
Genome-wide CRISPR knockout screens can identify genes required for spermidine binding-mediated phenotypes, such as tumor pyroptosis or inflammation.
Functional Genomics
RNA-seq and proteomics can reveal downstream effects of spermidine binding. For instance, transcriptomic analysis of oocytes treated with spermidine showed improved quality.
How CRISPR Can Be Used to Study GO:0019809 spermidine binding
Knockout
CRISPR knockout of spermidine-binding genes such as MYO6 or cGAS can reveal their roles in tumor pyroptosis and DNA sensing. Knockout models are essential for loss-of-function studies.
Point Mutation
Introducing point mutations in the spermidine binding pocket can dissect specific interactions. For example, mutating residues in PotF altered binding modes.
Knock-in
Knock-in of tagged spermidine-binding proteins allows visualization and pull-down assays. This approach can be used to study spermidine synthase dynamics.
Overexpression
Overexpression of spermidine-binding proteins can enhance phenotypes, such as improved oocyte quality or increased endocytosis. This is useful for gain-of-function studies.
How EDITGENE Supports spermidine binding Research
Researchers studying spermidine binding-related genes often need to determine whether a candidate gene is causally involved in a specific phenotype. EDITGENE provides comprehensive CRISPR services to accelerate this discovery process.
Contact EDITGENE today to design your custom CRISPR model for spermidine binding research.
Frequently Asked Questions About spermidine binding
What is spermidine binding?
Spermidine binding is a molecular function (GO:0019809) defined as the binding to spermidine, N-(3-aminopropyl)-1,4-diaminobutane, a polyamine involved in cell growth and stress responses.
What genes are involved in spermidine binding?
Key genes include PotF, MYO6, SPDS, SpdH, OR5AN1, and cGAS, as shown by structural and functional studies.
How does spermidine binding affect cancer?
Spermidine binding to MYO6 inhibits tumor pyroptosis, promoting cancer cell survival. Polyamine metabolism also controls cGAS activity, affecting cancer immunity.
What is the role of spermidine binding in inflammation?
Spermidine binding shapes polymorphonuclear myeloid-derived suppressor cells to restrict neonatal inflammation.
Can spermidine binding improve oocyte quality?
Yes, spermidine supplementation enhances the quality of postovulatory aged porcine oocytes, suggesting a role for spermidine binding.
What methods are used to study spermidine binding?
Methods include X-ray crystallography, ITC, SPR, CRISPR screens, RNA-seq, and proteomics.
How can CRISPR help study spermidine binding?
CRISPR knockout, point mutation, knock-in, and overexpression models allow functional dissection of spermidine-binding proteins.
What diseases are linked to spermidine binding?
Cancer, inflammation, reproductive aging, and DNA sensing disorders are linked to spermidine binding.
What is the definition of GO:0019809?
GO:0019809 is defined as binding to spermidine, N-(3-aminopropyl)-1,4-diaminobutane.
How does spermidine binding regulate DNA sensing?
Polyamine metabolism controls B-to-Z DNA transition to orchestrate cGAS activity, linking spermidine binding to DNA sensing.
Conclusion
Spermidine binding (GO:0019809) is a fundamental molecular function with broad implications in cancer, inflammation, reproductive aging, and DNA sensing. Key proteins such as MYO6, cGAS, and spermidine synthase mediate these effects through specific binding interactions. CRISPR-based models are powerful tools to dissect the causal roles of these proteins. EDITGENE offers comprehensive services to support your research on spermidine binding, from knockout to library screening.
References
- 1. Bai J et al.. 2024. Supplementation of spermidine enhances the quality of postovulatory aged porcine oocytes.. Cell Commun Signal 22(1):499 PMID: 39407270
- 2. Wu J et al.. 2025. Methionine metabolite spermidine inhibits tumor pyroptosis by enhancing MYO6-mediated endocytosis.. Nat Commun 16(1):2184 PMID: 40038267
- 3. Chen J et al.. 2025. Spermidine restricts neonatal inflammation via metabolic shaping of polymorphonuclear myeloid-derived suppressor cells.. J Clin Invest 135(7) PMID: 40166929
- 4. Kröger P et al.. 2021. Fine-tuning spermidine binding modes in the putrescine binding protein PotF.. J Biol Chem 297(6):101419 PMID: 34801550
- 5. Zhao C et al.. 2023. Polyamine metabolism controls B-to-Z DNA transition to orchestrate DNA sensor cGAS activity.. Immunity 56(11):2508-2522.e6 PMID: 37848037
- 6. Guo L et al.. 2023. Structural basis of amine odorant perception by a mammal olfactory receptor.. Nature 618(7963):193-200 PMID: 37225986
- 7. Che S et al.. 2022. Structure of Pseudomonas aeruginosa spermidine dehydrogenase: a polyamine oxidase with a novel heme-binding fold.. FEBS J 289(7):1911-1928 PMID: 34741591
- 8. Sečkutė J et al.. 2011. Binding and inhibition of human spermidine synthase by decarboxylated S-adenosylhomocysteine.. Protein Sci 20(11):1836-44 PMID: 21898642
