GO:0003690 double-stranded DNA binding: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0003690 (double-stranded DNA binding) is a molecular function defined as binding to double-stranded DNA, with the synonym dsDNA binding [QuickGO].
• Proteins with this activity recognize the DNA double helix through sequence-specific or nonspecific interactions, and computational methods such as HMM profiles and CNNs can predict them from sequence.
• Experimental assays for dsDNA binding include oligonucleotide binding assays, spectroscopic methods, and biophysical techniques.
• Viral proteins such as HIV-1 nucleocapsid protein bind dsDNA in multiple modes to regulate compaction and capsid uncoating.
• Small molecules and nanomaterials can also bind dsDNA, which is relevant for drug development and nanotoxicology.
• Understanding dsDNA binding is essential for CRISPR gene editing, transcription regulation, and DNA repair research.
Description
Double-stranded DNA binding (GO:0003690) is a fundamental molecular function that underpins many biological processes, including transcription, DNA replication, recombination, and repair. Proteins that bind double-stranded DNA (dsDNA) recognize the helical structure through various structural motifs, enabling them to read genetic information or modulate DNA transactions. This function is not limited to sequence-specific transcription factors; it also includes nonspecific DNA-binding proteins that package or stabilize the genome.
double-stranded DNA binding At A Glance
| GO ID | GO:0003690 |
|---|---|
| GO term | double-stranded DNA binding |
| Ontology | molecular_function |
| Synonym | dsDNA binding |
| Major function | Binding to double-stranded DNA |
| Definition | Binding to double-stranded DNA. |
| Related functions | single-stranded DNA binding, sequence-specific DNA binding |
| Predictive methods | HMM profiles, convolutional neural networks |
| Experimental assays | Oligonucleotide binding assays, spectroscopy, biophysical methods |
What Is GO:0003690?
According to the Gene Ontology, GO:0003690 double-stranded DNA binding is defined as binding to double-stranded DNA. It is a molecular function term with the synonym dsDNA binding. This activity encompasses any interaction between a molecule (typically a protein) and a DNA duplex, regardless of sequence specificity or biological outcome.
Why Is double-stranded DNA binding Important in Cell Biology?
Double-stranded DNA binding is central to gene regulation, genome maintenance, and biotechnology. Many transcription factors, DNA repair enzymes, and CRISPR-Cas proteins rely on dsDNA binding to function. Dysregulation of dsDNA-binding proteins is linked to cancer, developmental disorders, and viral pathogenesis. Moreover, understanding dsDNA binding informs the design of drugs and nanomaterials that target DNA.
• Enables sequence-specific recognition of promoters and enhancers by transcription factors.
• Essential for DNA replication, repair, and recombination machineries.
• Underlies CRISPR-Cas9 targeting and gene editing applications.
• Viral proteins like HIV-1 nucleocapsid use dsDNA binding for capsid uncoating.
• Small molecules can modulate dsDNA binding, offering therapeutic avenues.
• Nanomaterials such as graphene oxide-silver nanocomposites interact with dsDNA, with implications for biosafety.
• Computational prediction of dsDNA-binding proteins accelerates functional annotation.
• DNA-encoded libraries rely on dsDNA tags, where ligand binding affinity can be influenced by DNA structure.
• Defects in dsDNA binding can lead to genomic instability and disease.
• Assays for dsDNA binding are critical for drug discovery and mechanistic studies.
What Happens During double-stranded DNA binding?
Recognition of the DNA duplex
In simple terms: The protein finds and attaches to the double helix.
Proteins scan the DNA for specific sequences or structural features. This can involve electrostatic interactions with the phosphate backbone or insertion of amino acid side chains into the major or minor groove. Nonspecific binding is often driven by charge complementarity, while specific binding requires hydrogen bonds and van der Waals contacts.
Conformational changes in protein and DNA
In simple terms: Both the protein and DNA may change shape upon binding.
Binding often induces conformational changes in the protein, such as folding of disordered regions, and can bend or distort the DNA helix. For example, HIV-1 nucleocapsid protein binds dsDNA in multiple modes to regulate compaction and capsid uncoating. Such plasticity allows functional diversity.
Stabilization of the complex
In simple terms: The interaction is stabilized by multiple weak forces.
The bound state is maintained by a combination of hydrogen bonds, electrostatic interactions, and hydrophobic effects. Experimental techniques such as spectroscopic methods can quantify binding affinity and stoichiometry. The stability of the complex determines its biological lifetime and regulatory impact.
Functional consequences
In simple terms: Binding leads to a biological outcome.
Depending on the protein, dsDNA binding can activate or repress transcription, initiate DNA repair, or facilitate genome packaging. For instance, binding of single/double stranded ct-DNA with graphene oxide-silver nanocomposites has been studied for its potential in biosensing and therapy. In DNA-encoded libraries, the presence of dsDNA tags can influence ligand binding affinity.
Key Genes Involved in GO:0003690 double-stranded DNA binding
The following genes encode proteins with demonstrated or predicted double-stranded DNA binding activity (GO:0003690), based on experimental evidence and computational predictions.
| Gene | Major Role | Research Relevance |
|---|---|---|
| TP53 | Sequence-specific transcription factor | Tumor suppressor, binds dsDNA to regulate cell cycle |
| CTNNB1 | Transcription coactivator | Wnt signaling, binds dsDNA via TCF/LEF |
| GAPDH | Nonspecific dsDNA binding | Moonlighting function in DNA repair |
| HIV-1 NC | Viral nucleocapsid protein | Binds dsDNA in multiple modes for uncoating |
| H2AFX | Histone variant | DNA damage response, binds dsDNA |
| POLR2A | RNA polymerase II subunit | Transcription, binds dsDNA template |
| XRCC1 | DNA repair protein | Base excision repair, binds dsDNA |
| BRCA1 | DNA repair | Homologous recombination, binds dsDNA |
| OGG1 | DNA glycosylase | Oxidative damage repair, binds dsDNA |
| PARP1 | Poly(ADP-ribose) polymerase | Binds dsDNA breaks, repair |
| MRE11 | DNA repair | Homologous recombination, binds dsDNA |
| RAD51 | Recombinase | Binds dsDNA to promote strand invasion |
| TOP1 | Topoisomerase | Relieves supercoils, binds dsDNA |
| DNMT1 | DNA methyltransferase | Epigenetic regulation, binds dsDNA |
| E2F1 | Transcription factor | Cell cycle regulation, binds dsDNA |
| NFKB1 | Transcription factor | Immune response, binds dsDNA |
| STAT3 | Transcription factor | Signal transduction, binds dsDNA |
How Is double-stranded DNA binding Regulated?
The activity of double-stranded DNA binding proteins is regulated at multiple levels, including post-translational modifications (e.g., phosphorylation, acetylation), protein-protein interactions, and availability of cofactors. For example, the binding of HIV-1 nucleocapsid protein to dsDNA is modulated by nucleic acid chaperone activity and redox state. Additionally, small molecules can inhibit or enhance dsDNA binding, as shown for amodiaquine which nonspecifically binds dsDNA and three-way junction DNA structures. In DNA-encoded libraries, the presence of single-stranded or double-stranded DNA tags can influence ligand binding affinity, highlighting the impact of DNA structure on binding events.
double-stranded DNA binding and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| TP53 | Li-Fraumeni syndrome, cancer | Knockout cell line, point mutation knock-in |
| BRCA1 | Hereditary breast and ovarian cancer | Knockout, overexpression |
| HIV-1 NC | AIDS, viral replication | Viral infection model, point mutation |
| OGG1 | Neurodegeneration, cancer | Knockout, knock-in |
| PARP1 | Cancer, DNA repair deficiency | Knockout, inhibitor studies |
Cancer
Mutations in genes encoding dsDNA-binding proteins, such as TP53 and BRCA1, are frequently observed in cancers. These proteins rely on dsDNA binding to regulate cell cycle checkpoints and DNA repair. Loss of function leads to genomic instability and tumor progression.
Viral infections
Viruses exploit dsDNA binding for replication and packaging. HIV-1 nucleocapsid protein binds dsDNA to facilitate capsid uncoating and reverse transcription, making it a target for antiviral strategies.
Neurodegeneration
Defects in DNA repair proteins that bind dsDNA, such as those involved in base excision repair, are linked to neurodegenerative disorders. For example, OGG1 dysfunction contributes to oxidative DNA damage accumulation in neurons.
Nanotoxicology
Engineered nanomaterials like graphene oxide-silver nanocomposites can bind dsDNA, potentially causing genotoxicity. Understanding these interactions is crucial for safe nanomaterial design.
From double-stranded DNA binding-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of dsDNA binding affect transcription? | Knockout of transcription factor gene |
| Does a point mutation alter DNA binding affinity? | Point mutation knock-in |
| Can a tag help visualize dsDNA binding in live cells? | Tagged knock-in (e.g., GFP) |
| Does overexpression of a dsDNA-binding protein drive oncogenesis? | Overexpression cell line |
| Which genes are essential for dsDNA binding in a pathway? | CRISPR library screening |
| How does a drug affect dsDNA binding? | Biochemical assay with recombinant protein |
How to Study the double-stranded DNA binding Process
| Method | What It Measures | Typical Application |
|---|---|---|
| EMSA | Protein-DNA complex formation | Qualitative binding assessment |
| Fluorescence polarization | Binding affinity (Kd) | Quantitative binding studies |
| Circular dichroism | DNA conformational changes | Structural impact of binding |
| HMM profiles | Sequence-based prediction | Annotation of dsDNA-binding proteins |
| CNN-Pred | Deep learning prediction | High-throughput screening |
| ITC | Thermodynamics of binding | Mechanistic studies |
| SPR | Real-time binding kinetics | Drug screening |
Oligonucleotide binding assays
These assays measure the interaction between a protein and defined dsDNA oligonucleotides. They can be performed using electrophoretic mobility shift assay (EMSA) or fluorescence polarization. Mozafari et al. describe methods for assessing oligonucleotide binding to double-stranded DNA.
Spectroscopic methods
Techniques such as UV-Vis, fluorescence, and circular dichroism spectroscopy can monitor conformational changes and binding affinities. Xu et al. used multispectroscopic approaches to study binding of ct-DNA with graphene oxide-silver nanocomposites.
Computational prediction
Machine learning methods, including HMM profiles and convolutional neural networks, predict dsDNA-binding proteins from sequence data. Sharma et al. developed a prediction method using HMM profiles, and Manavi et al. introduced CNN-Pred.
Biophysical characterization
Isothermal titration calorimetry (ITC) and surface plasmon resonance (SPR) provide quantitative binding parameters. These methods are essential for understanding the thermodynamics of dsDNA binding.
How CRISPR Can Be Used to Study GO:0003690 double-stranded DNA binding
Knockout
CRISPR knockout of genes encoding dsDNA-binding proteins can reveal their essential functions. For example, knocking out TP53 in cell lines helps study its role in DNA damage response.
Point Mutation
Introducing point mutations in the DNA-binding domain can dissect the contribution of specific residues to dsDNA binding. This is particularly useful for separating binding from other functions.
Knock-in
Knock-in of tagged versions (e.g., GFP) allows live-cell imaging of dsDNA binding dynamics. This approach can track protein localization and interactions in real time.
Overexpression
Overexpression of dsDNA-binding proteins can model gain-of-function phenotypes, such as oncogenic transformation. It is also used to produce recombinant protein for biochemical assays.
How EDITGENE Supports double-stranded DNA binding Research
Researchers studying double-stranded DNA binding-related genes often need to determine whether a candidate gene is causally involved in a specific biological process or disease. This requires precise genetic models that can knockout, mutate, or tag the gene of interest.
Contact EDITGENE today to design your custom CRISPR model for double-stranded DNA binding research.
Frequently Asked Questions About double-stranded DNA binding
What is GO:0003690?
GO:0003690 is the Gene Ontology term for double-stranded DNA binding, defined as binding to double-stranded DNA [QuickGO].
What genes are involved in double-stranded DNA binding?
Many genes encode dsDNA-binding proteins, including TP53, BRCA1, PARP1, and viral genes like HIV-1 NC.
How can I predict if a protein binds double-stranded DNA?
Computational tools such as HMM profiles and CNN-Pred can predict dsDNA-binding proteins from sequence data.
What experimental methods study dsDNA binding?
Common methods include EMSA, fluorescence polarization, ITC, and spectroscopic techniques.
Why is double-stranded DNA binding important in cancer?
Mutations in dsDNA-binding proteins like TP53 and BRCA1 impair DNA repair and cell cycle control, leading to cancer.
Can small molecules inhibit dsDNA binding?
Yes, compounds like amodiaquine can bind dsDNA nonspecifically, potentially interfering with protein-DNA interactions.
How does HIV-1 nucleocapsid protein bind dsDNA?
It binds dsDNA in multiple modes to regulate compaction and capsid uncoating.
What is the role of dsDNA binding in CRISPR?
CRISPR-Cas9 relies on dsDNA binding to recognize and cleave target DNA sequences.
How do nanomaterials interact with dsDNA?
Nanomaterials like graphene oxide-silver nanocomposites can bind dsDNA, which may cause genotoxicity.
What CRISPR models are available for studying dsDNA binding?
EDITGENE offers knockout, point mutation, knock-in, and overexpression models for genes encoding dsDNA-binding proteins.
Conclusion
Double-stranded DNA binding (GO:0003690) is a pervasive molecular function essential for gene regulation, genome stability, and viral replication. Advances in computational prediction and experimental assays continue to expand our understanding of dsDNA-binding proteins and their roles in health and disease. Targeting these interactions holds promise for therapeutic development and biotechnology applications.
References
- 1. Xu X et al.. 2024. Binding of single/double stranded ct-DNA with graphene oxide‑silver nanocomposites in vitro: A multispectroscopic approach.. Int J Biol Macromol 275(Pt 2):133715 PMID: 38977048
- 2. Mozafari N et al.. 2019. Assessing Oligonucleotide Binding to Double-Stranded DNA.. Methods Mol Biol 2036:91-112 PMID: 31410792
- 3. Sharma R et al.. 2021. Single-stranded and double-stranded DNA-binding protein prediction using HMM profiles.. Anal Biochem 612:113954 PMID: 32946833
- 4. Slavkovic S et al.. 2024. Amodiaquine Nonspecifically Binds Double Stranded and Three-Way Junction DNA Structures.. Chembiochem 25(14):e202400116 PMID: 38668388
- 5. Manavi F et al.. 2023. CNN-Pred: Prediction of single-stranded and double-stranded DNA-binding protein using convolutional neural networks.. Gene 853:147045 PMID: 36503892
- 6. Bittner P et al.. 2025. The Influence of Single-Stranded or Double-Stranded DNA Tags on Ligand Binding Affinity in DNA-Encoded Libraries.. Anal Chem 97(37):20412-20421 PMID: 40924790
- 7. Gien H et al.. 2022. HIV-1 Nucleocapsid Protein Binds Double-Stranded DNA in Multiple Modes to Regulate Compaction and Capsid Uncoating.. Viruses 14(2) PMID: 35215829
- 8. Gao D et al.. 2021. Defect-Induced Double-Stranded DNA Unwinding on Graphene.. J Phys Chem B 125(11):2833-2840 PMID: 33689362
