GO:0032356 oxidized DNA binding: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0032356 (oxidized DNA binding) is a molecular function defined as binding to a DNA region containing an oxidized residue, such as 8-hydroxy-2'-deoxyguanosine (8-OHdG).
• Oxidized DNA lesions are generated by reactive oxygen species and can be quantified by immunoanalytical methods, linking this binding activity to mutagenesis and carcinogenesis research.
• DNA-binding proteins can influence the distribution and long-range migration of oxidative damage along DNA, shaping where oxidized-residue recognition occurs.
• The redox environment and radical-free oxidative stress biology provide the conceptual framework for understanding when and where oxidized DNA binding is relevant.
• Transcription factors such as NFE2L2/NRF2 coordinate cellular responses to oxidative stress and modulate degradation pathways that intersect with oxidized macromolecule handling.
• Cellular senescence and oxidative injury models, including hyperoxic bronchopulmonary dysplasia, provide experimental systems in which oxidized DNA binding and oxidative DNA damage responses can be studied.
Description
GO:0032356, oxidized DNA binding, is a molecular function term in the Gene Ontology that describes the binding of a protein or other molecule to a DNA region containing an oxidized residue. Oxidized DNA residues, most prominently 8-hydroxy-2'-deoxyguanosine (8-OHdG), are promutagenic lesions formed when reactive oxygen species attack guanine bases, and their quantitative immunoanalysis has been established as a direct way to monitor oxidative DNA damage. Because these lesions alter both the chemical structure and the readout of the genetic template, proteins that recognize them occupy a central position in DNA repair, damage signaling, and mutagenesis research. The broader context of this binding activity is the radical-free biology of oxidative stress, in which redox couples and thiol-disulfide equilibria, rather than only free radicals, govern how cells sense and respond to oxidizing conditions. Within that framework, oxidized DNA binding represents the molecular recognition step that converts a chemical lesion into a biological signal. DNA-binding proteins themselves can modulate long-range oxidative damage to DNA, meaning that the identity and occupancy of DNA-bound factors influence where oxidized residues appear and how they are subsequently recognized. This interplay makes GO:0032356 relevant not only to DNA repair but also to transcription, chromatin biology, and the mechanisms by which oxidative stress reshapes gene expression programs. Experimentally, oxidized DNA binding is studied with a combination of immunochemical lesion quantification, biophysical DNA-binding assays, and cellular oxidative-stress models. The term therefore serves as a useful annotation target for researchers who want to connect a candidate protein to oxidative DNA damage biology in a mechanistically precise way.
oxidized DNA binding At A Glance
| GO ID | GO:0032356 |
|---|---|
| GO term | oxidized DNA binding |
| Ontology | molecular_function |
| Synonym | oxidised DNA binding |
| Definition | Binding to a DNA region containing an oxidized residue. |
| Major function | Recognition of DNA substrates that carry oxidized residues such as 8-hydroxy-2'-deoxyguanosine |
| Related chemistry | Oxidative DNA damage generated by reactive oxygen species and measured by immunoanalysis of promutagenic lesions |
| Related biology | Radical-free oxidative stress biology and redox-dependent cellular responses |
| Modulating factors | DNA-binding proteins that alter long-range oxidative damage distribution along DNA |
What Is GO:0032356?
In plain terms, GO:0032356 describes the ability of a molecule to stick to a piece of DNA that contains an oxidized base or oxidized residue. The QuickGO definition states that this molecular function is binding to a DNA region containing an oxidized residue. The synonym oxidised DNA binding reflects the same concept using British spelling. Unlike generic DNA binding, this term is restricted to DNA substrates in which oxidation has chemically modified a residue, so annotation to GO:0032356 implies that the oxidized state of the DNA is part of what is being recognized. The most widely measured example of such a residue is 8-hydroxy-2'-deoxyguanosine, a promutagenic oxidation product of guanine that can be detected quantitatively by immunoanalysis. Because oxidized residues can arise from reactive oxygen species generated during normal metabolism or from external oxidants, binding to them connects molecular recognition to oxidative stress biology.
Why Is oxidized DNA binding Important in Cell Biology?
Oxidized DNA binding matters because it is the molecular recognition step that links chemical oxidative damage in DNA to downstream biological outcomes such as repair, mutagenesis, and transcriptional change. Oxidative stress is a pervasive feature of aerobic life, and the radical-free biology framework shows that cells continuously manage redox balance through coupled thiol and redox systems rather than through radicals alone. When DNA bases are oxidized, the resulting lesions are promutagenic, and their quantitative measurement has been used to assess carcinogenic risk and oxidative damage burden. Proteins that bind oxidized DNA therefore sit at the interface between damage detection and the cellular response, and their activity can be influenced by other DNA-binding proteins that shape the long-range distribution of oxidative damage. In disease-oriented research, oxidative DNA damage and the responses it triggers are studied in conditions ranging from cancer to developmental lung injury, where cellular senescence contributes to disease progression in hyperoxic bronchopulmonary dysplasia. Understanding GO:0032356 also supports drug-discovery and nanocarrier studies, because DNA-binding profiles of compounds and conjugates are characterized with biophysical assays that can be adapted to oxidized substrates. Finally, oxidative stress intersects with proteostasis and autophagy regulation, as shown by the transcription factor NFE2L2/NRF2 modulating chaperone-mediated autophagy through LAMP2A regulation, and with protein turnover pathways in which DNA binding influences the degradation of oxidized histones by the 20S proteasome.
• Oxidized DNA residues such as 8-hydroxy-2'-deoxyguanosine are promutagenic and are used as quantitative markers of oxidative DNA damage.
• Binding to oxidized DNA converts a chemical lesion into a recognizable biological substrate, enabling repair and signaling responses.
• DNA-binding proteins can change the long-range distribution of oxidative damage, so oxidized DNA binding must be interpreted in the context of the proteins bound to DNA.
• Radical-free oxidative stress biology shows that redox couples and thiol systems, not only free radicals, govern cellular oxidative responses.
• Oxidative stress responses are coordinated by transcription factors such as NFE2L2/NRF2, which regulates chaperone-mediated autophagy via LAMP2A.
• DNA binding influences the degradation of oxidized histones by the 20S proteasome, connecting oxidized-substrate recognition to protein turnover.
• Cellular senescence contributes to the progression of hyperoxic bronchopulmonary dysplasia, providing a disease context for oxidative DNA damage research.
• Biophysical DNA-binding profiling of compounds and nanoconjugates provides methodological templates for studying oxidized DNA interactions.
• Peroxidase-catalyzed binding of xenobiotics such as benzidine to DNA and other macromolecules illustrates how reactive metabolites form DNA adducts relevant to damage recognition.
• Oxidized DNA binding is relevant to cancer research because oxidative DNA lesions are mutagenic and their burden can be measured immunochemically.
Molecular Mechanism of oxidized DNA binding
Formation of oxidized DNA residues
In simple terms: First, the DNA itself has to become oxidized before anything can bind to an oxidized residue.
Oxidized DNA binding requires a DNA substrate that already contains an oxidized residue. The best-characterized example is 8-hydroxy-2'-deoxyguanosine, a promutagenic oxidation product of guanine that is generated when reactive oxygen species attack DNA and that can be quantified by immunoanalysis. The broader redox environment in which such lesions arise is described by the radical-free biology of oxidative stress, which emphasizes redox couples and thiol-disulfide systems as central regulators of oxidative conditions in cells. The distribution of oxidative damage along DNA is not random and can be influenced by the proteins bound to the DNA, meaning that the formation of oxidized residues and their recognition are coupled processes. Reactive metabolites can also form covalent DNA adducts, as shown for peroxidase-catalyzed benzidine binding to DNA and other macromolecules, illustrating the diversity of oxidative and adduct-forming chemistries that create modified DNA substrates.
Recognition of the oxidized residue
In simple terms: Next, a protein has to physically recognize and bind the oxidized base within the DNA.
The defining event of GO:0032356 is binding to a DNA region containing an oxidized residue. This recognition step distinguishes oxidized DNA binding from generic DNA binding because the oxidized state of the residue is part of the molecular interface. Quantitative immunoanalysis of 8-hydroxy-2'-deoxyguanosine provides a direct way to measure the lesion that is being recognized, making it a practical readout for studies of this binding activity. Because DNA-binding proteins can affect long-range oxidative damage to DNA, the occupancy of other factors on the same DNA molecule can change which oxidized residues are present and therefore which binding events occur. The redox state of the cell, as framed by radical-free oxidative stress biology, sets the probability that oxidized residues persist long enough to be bound.
Coupling to repair and signaling
In simple terms: Once bound, the protein can trigger repair or send a signal that the DNA is damaged.
Binding to oxidized DNA is biologically meaningful because it can initiate downstream responses such as repair, damage signaling, or transcriptional regulation. The promutagenic nature of 8-hydroxy-2'-deoxyguanosine means that failure to process such lesions can lead to mutations, so recognition by oxidized-DNA-binding proteins is a critical checkpoint. Oxidative stress responses are coordinated with other stress pathways; for example, the transcription factor NFE2L2/NRF2 modulates chaperone-mediated autophagy through regulation of LAMP2A, showing how oxidative stress signaling intersects with proteostasis and degradation machinery. Protein turnover pathways also intersect with oxidized-substrate recognition, as DNA binding influences the degradation of oxidized histones by the 20S proteasome. Together, these connections place oxidized DNA binding within a network that links lesion recognition to cellular adaptation.
Influence of DNA-binding proteins on damage distribution
In simple terms: Other proteins sitting on the DNA can change where oxidative damage ends up.
The long-range distribution of oxidative damage to DNA depends on which proteins are bound to the DNA, so oxidized DNA binding cannot be considered in isolation from the broader nucleoprotein context. Different DNA-binding proteins affect long-range oxidative damage in distinct ways, which means that the same DNA sequence can present different oxidized-residue patterns depending on its protein occupancy. This has practical implications for experimental design: assays of oxidized DNA binding should account for the possibility that bound factors redistribute damage and thereby alter the substrate landscape. The redox environment further modulates these effects, consistent with the radical-free biology framework in which thiol and redox couples govern oxidative conditions.
Experimental detection of oxidized DNA binding
In simple terms: Scientists detect this binding using antibodies, biophysical assays, and oxidative-stress models.
Detection of oxidized DNA binding relies on methods that can both quantify oxidized lesions and measure protein-DNA interaction. Quantitative immunoanalysis of 8-hydroxy-2'-deoxyguanosine is a direct approach for measuring the oxidized residue that defines the substrate. Biophysical DNA-binding profiling, as demonstrated for a modulated nanoconjugate of umbelliferone cobalt oxide loaded on graphene oxide, provides a template for characterizing binding affinities and modes with DNA. Cellular models of oxidative injury, such as hyperoxic bronchopulmonary dysplasia in which cellular senescence contributes to progression, allow oxidized DNA binding and its downstream consequences to be studied in a disease-relevant setting. Peroxidase-catalyzed adduct formation studies further illustrate how reactive chemistry can be used experimentally to generate modified DNA substrates for binding analysis.
Key Genes Involved in GO:0032356 oxidized DNA binding
The following genes and proteins are relevant to oxidized DNA binding research because they have been experimentally connected to oxidative DNA damage, oxidized-substrate recognition, redox regulation, or the cellular responses that follow oxidized DNA binding.
| Gene | Major Role | Research Relevance |
|---|---|---|
| NFE2L2 | Transcription factor coordinating oxidative stress responses and modulating chaperone-mediated autophagy via LAMP2A | Central regulator of redox adaptation that shapes the cellular context of oxidized DNA binding |
| LAMP2A | Chaperone-mediated autophagy receptor regulated by NFE2L2/NRF2 | Links oxidative stress signaling to lysosomal degradation pathways |
| TP53 | Tumor suppressor responsive to DNA damage and oxidative stress | Relevant to mutagenesis and cancer biology downstream of oxidized DNA lesions |
| OGG1 | DNA glycosylase that recognizes oxidized guanine lesions | Directly relevant to recognition of 8-hydroxy-2'-deoxyguanosine, the canonical oxidized DNA residue |
| MUTYH | DNA repair enzyme involved in oxidative DNA damage responses | Relevant to promutagenic oxidized lesion processing |
| H2AX | Histone variant involved in DNA damage signaling | Connects chromatin and oxidized-substrate turnover to damage signaling |
| Histone H1 | Linker histone whose oxidized forms are degraded by the 20S proteasome in a DNA-binding-dependent manner | Model for how DNA binding influences degradation of oxidized proteins |
| Histone H2A | Core histone subject to oxidative modification and proteasomal degradation | Relevant to oxidized protein turnover and chromatin stability |
| Histone H2B | Core histone subject to oxidative modification and proteasomal degradation | Relevant to oxidized protein turnover and chromatin stability |
| Histone H3 | Core histone subject to oxidative modification and proteasomal degradation | Relevant to oxidized protein turnover and chromatin stability |
| Histone H4 | Core histone subject to oxidative modification and proteasomal degradation | Relevant to oxidized protein turnover and chromatin stability |
| NQO1 | NAD(P)H quinone dehydrogenase 1, a canonical NRF2 target | Readout of NRF2-dependent antioxidant response relevant to oxidative DNA damage |
| HMOX1 | Heme oxygenase 1, a canonical NRF2 target | Readout of NRF2-dependent antioxidant response relevant to oxidative DNA damage |
| SQSTM1 | Sequestosome 1, involved in autophagic cargo recognition | Connects oxidative stress responses to selective autophagy |
| PSMD1 | 20S proteasome regulatory subunit | Relevant to degradation of oxidized histones and DNA-binding-dependent turnover |
| PSMA1 | 20S proteasome alpha subunit | Relevant to degradation of oxidized histones and DNA-binding-dependent turnover |
| GAPDH | Glycolytic enzyme with reported DNA-binding and oxidative modification properties | Model protein for studying how DNA binding affects oxidative damage distribution |
| Benzidine-metabolizing peroxidases | Enzymes that catalyze benzidine binding to DNA and macromolecules | Model system for reactive metabolite-DNA adduct formation |
How Is oxidized DNA binding Regulated?
Oxidized DNA binding is regulated by the cellular redox environment and by the proteins that occupy DNA. The radical-free biology of oxidative stress describes how redox couples and thiol-disulfide systems, rather than free radicals alone, set the oxidative tone of the cell and therefore influence whether oxidized DNA residues persist and are available for binding. Transcription factors such as NFE2L2/NRF2 coordinate antioxidant and autophagy-related gene programs, including regulation of LAMP2A and chaperone-mediated autophagy, which shapes the cellular capacity to manage oxidative damage. The distribution of oxidative damage along DNA is itself modulated by DNA-binding proteins, so changes in chromatin occupancy or transcription factor binding can alter where oxidized residues form and are recognized. Protein turnover adds another layer: DNA binding influences the degradation of oxidized histones by the 20S proteasome, meaning that the stability of oxidized DNA-associated proteins is coupled to their DNA-binding status. Finally, reactive metabolite chemistry, such as peroxidase-catalyzed benzidine binding to DNA, shows that exogenous and metabolic oxidants can generate modified DNA substrates that expand the range of ligands for oxidized DNA binding.
oxidized DNA binding and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| NFE2L2 | Oxidative stress response and chaperone-mediated autophagy regulation | Knockout and overexpression cell models with oxidative stress challenge |
| LAMP2A | Chaperone-mediated autophagy and proteostasis | Knockout cell models to test autophagy flux under oxidative stress |
| OGG1 | Oxidized guanine lesion recognition and mutagenesis | Point-mutation knock-in models at catalytic residues |
| MUTYH | Promutagenic oxidized lesion processing | Knockout and knock-in models with 8-OHdG quantification |
| Histone H1 | Oxidized histone degradation by the 20S proteasome | Tagged knock-in models to track DNA-binding-dependent turnover |
Cancer and mutagenesis
Oxidized DNA residues such as 8-hydroxy-2'-deoxyguanosine are promutagenic, and their quantitative immunoanalysis has been used to assess oxidative DNA damage burden relevant to carcinogenesis. Because oxidized DNA binding is the recognition step for such lesions, defects or alterations in this activity can influence mutation rates and cancer risk. DNA-binding proteins can also shape the long-range distribution of oxidative damage, which may affect which genomic regions accumulate mutagenic lesions. The redox environment described by radical-free oxidative stress biology further modulates these processes, linking antioxidant capacity to cancer-relevant DNA damage.
Neurodegeneration and proteostasis
Oxidative stress and impaired protein degradation are recurring themes in neurodegenerative disease research. NFE2L2/NRF2 modulates chaperone-mediated autophagy through regulation of LAMP2A, connecting oxidative stress signaling to lysosomal degradation pathways that are relevant to neuronal proteostasis. DNA binding influences the degradation of oxidized histones by the 20S proteasome, showing that oxidized-substrate recognition and protein turnover are mechanistically linked. These connections suggest that oxidized DNA binding sits within a broader network of oxidative damage handling that is relevant to neurodegeneration.
Developmental lung injury and senescence
Cellular senescence contributes to the progression of hyperoxic bronchopulmonary dysplasia, a developmental lung injury driven by oxidative stress. This disease model provides a setting in which oxidative DNA damage, senescence, and the recognition of oxidized DNA can be studied together. The radical-free oxidative stress framework helps explain how redox imbalance in the developing lung translates into cellular damage responses. Because oxidized DNA binding is the recognition step for oxidized residues, it is mechanistically positioned between oxidative exposure and senescence-associated outcomes.
Xenobiotic and adduct-related DNA damage
Peroxidase-catalyzed benzidine binding to DNA and other macromolecules demonstrates that reactive metabolites can form covalent DNA modifications, expanding the range of modified DNA substrates that may be recognized by damage-binding proteins. Such adduct-forming chemistry is relevant to environmental and occupational exposure research. When combined with oxidative DNA damage measurements, adduct studies help define the full spectrum of modified DNA that cells must recognize and process. This broader view supports the interpretation of oxidized DNA binding as part of a general modified-DNA recognition problem.
From oxidized DNA binding-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does a candidate protein directly bind oxidized DNA? | Recombinant protein with biophysical DNA-binding assays using oxidized substrates |
| Is a gene required for cellular responses to oxidized DNA? | CRISPR knockout cell model with 8-OHdG immunoanalysis |
| Does a specific residue mediate oxidized DNA recognition? | Point-mutation knock-in cell model |
| Where does the protein localize after oxidative stress? | Tagged knock-in with imaging under oxidative challenge |
| Does overexpression alter oxidative DNA damage burden? | Overexpression cell model with quantitative lesion measurement |
| Does the gene interact with autophagy or proteostasis pathways? | Knockout model combined with autophagy and proteasome readouts |
How to Study the oxidized DNA binding Process
| Method | What It Measures | Typical Application |
|---|---|---|
| 8-OHdG immunoanalysis | Levels of the oxidized guanine lesion in DNA | Quantifying oxidative DNA damage in cells and tissues |
| Biophysical DNA-binding assay | Affinity and mode of protein or compound binding to DNA | Characterizing oxidized DNA binding specificity |
| Oxidative stress cell model | Cellular responses to oxidizing conditions | Testing gene function under oxidative challenge |
| Senescence assays | Senescence markers in oxidative injury models | Studying hyperoxic lung injury and related disease biology |
| Autophagy flux assays | Chaperone-mediated autophagy activity via LAMP2A | Linking oxidative stress responses to proteostasis |
| 20S proteasome degradation assay | Degradation of oxidized histones as a function of DNA binding | Testing coupling between DNA binding and protein turnover |
| Reactive metabolite adduct assay | Covalent binding of metabolites such as benzidine to DNA | Modeling adduct-forming DNA damage chemistry |
| CRISPR perturbation with lesion readout | Causal effect of a gene on oxidized DNA levels | Validating candidate oxidized DNA binding genes |
Quantitative immunoanalysis of oxidized DNA lesions
Quantitative immunoanalysis of 8-hydroxy-2'-deoxyguanosine is a direct method for measuring the oxidized residue that defines the substrate for GO:0032356. This approach allows researchers to correlate lesion burden with binding activity and with downstream biological outcomes such as mutagenesis. It is particularly useful in cell models of oxidative stress where the goal is to link a candidate protein to changes in oxidized DNA levels. When combined with genetic perturbation, it provides a quantitative readout for testing whether a gene affects oxidized DNA handling.
Biophysical DNA-binding profiling
Biophysical binding assays characterize how proteins or compounds interact with DNA, including affinity and binding mode. These methods have been applied to a modulated nanoconjugate of umbelliferone cobalt oxide loaded on graphene oxide as a drug carrier, demonstrating their utility for complex DNA-binding systems. For oxidized DNA binding, such assays can be adapted by using DNA substrates that contain defined oxidized residues. They are especially valuable for distinguishing oxidized-DNA-specific binding from generic DNA binding.
Oxidative stress and senescence cell models
Cellular models of oxidative injury allow oxidized DNA binding and its consequences to be studied in a physiological context. Hyperoxic bronchopulmonary dysplasia is a disease model in which cellular senescence contributes to progression, making it suitable for studying oxidative DNA damage responses. The radical-free oxidative stress framework provides the conceptual basis for designing such experiments around redox couples and thiol systems. These models can be combined with genetic perturbation to test causality.
Proteostasis and degradation assays
Because DNA binding influences the degradation of oxidized histones by the 20S proteasome, degradation assays are relevant to oxidized DNA binding research. Chaperone-mediated autophagy, regulated by NFE2L2/NRF2 through LAMP2A, provides an additional proteostasis readout that intersects with oxidative stress responses. Combining binding assays with degradation measurements helps determine whether oxidized DNA recognition is coupled to protein turnover. Such integrated approaches are useful for building mechanistic models of oxidative damage handling.
How CRISPR Can Be Used to Study GO:0032356 oxidized DNA binding
Knockout
CRISPR knockout is used to remove a candidate gene and test whether it is required for oxidized DNA binding or for cellular responses to oxidized DNA. Knockout cell models can be combined with quantitative 8-OHdG immunoanalysis to determine whether loss of the gene changes oxidized lesion burden. For genes connected to oxidative stress signaling, such as NFE2L2, knockout models help define downstream effects on autophagy and proteostasis. Knockout of genes involved in oxidized histone turnover can be used to test coupling between DNA binding and 20S proteasome degradation.
Point Mutation
Point-mutation knock-in models allow specific residues to be tested for their role in oxidized DNA recognition. This is important because binding to an oxidized residue is a structurally defined event, and single amino acid changes can abolish or alter specificity. Point mutants can be compared with wild-type cells using biophysical binding assays and lesion quantification to establish structure-function relationships. Such models are also useful for separating DNA-binding activity from other functions of the same protein.
Knock-in
Knock-in strategies, including tagged knock-in, enable tracking of the protein of interest in its native genomic context. Tagged knock-in models can be used with imaging to determine where the protein localizes after oxidative stress and whether it accumulates at oxidized DNA sites. Knock-in of disease-associated variants can be used to test whether specific alleles alter oxidized DNA binding or downstream damage responses. These models are particularly valuable when overexpression artifacts must be avoided.
Overexpression
Overexpression models are used to test whether increased levels of a candidate protein change oxidized DNA damage burden or cellular oxidative stress responses. Overexpression can be combined with quantitative lesion measurement to determine whether the protein is limiting for oxidized DNA handling. For redox-related transcription factors such as NFE2L2, overexpression studies help define downstream target gene programs and effects on autophagy. Overexpression should be interpreted carefully because supraphysiological levels can produce effects not seen at endogenous expression.
How EDITGENE Supports oxidized DNA binding Research
Researchers studying oxidized DNA binding-related genes often need to determine whether a candidate gene is causally involved in recognizing or responding to oxidized DNA, rather than merely correlating with oxidative stress. Answering that question requires precise genetic models in which the gene can be removed, mutated, tagged, or overexpressed, combined with quantitative readouts of oxidized DNA lesions and binding activity. EDITGENE provides the cell-model and screening tools needed to build such causal evidence.
Contact EDITGENE today to design your custom CRISPR model for oxidized DNA binding research.
Frequently Asked Questions About oxidized DNA binding
What is GO:0032356 oxidized DNA binding?
GO:0032356 is a Gene Ontology molecular function term defined as binding to a DNA region containing an oxidized residue, with the synonym oxidised DNA binding.
What does oxidized DNA binding mean in simple terms?
It means a protein or molecule attaches to DNA at a site where a base has been chemically oxidized, such as 8-hydroxy-2'-deoxyguanosine.
What genes are involved in oxidized DNA binding?
Relevant genes include NFE2L2, LAMP2A, OGG1, MUTYH, and histone genes, based on their roles in oxidative stress responses, oxidized lesion recognition, and oxidized protein turnover.
Why is oxidized DNA binding important in cancer?
Oxidized DNA residues such as 8-hydroxy-2'-deoxyguanosine are promutagenic, so recognition of these lesions is directly relevant to mutation and cancer research.
How is oxidized DNA damage measured?
Quantitative immunoanalysis of 8-hydroxy-2'-deoxyguanosine is a direct method for measuring oxidized DNA lesions.
Do DNA-binding proteins affect oxidative DNA damage?
Yes, different DNA-binding proteins affect long-range oxidative damage to DNA, meaning protein occupancy can change where oxidized residues form.
What is the role of NFE2L2 in oxidative stress?
NFE2L2/NRF2 is a transcription factor that modulates chaperone-mediated autophagy through regulation of LAMP2A, linking oxidative stress signaling to proteostasis.
How does DNA binding affect degradation of oxidized histones?
DNA binding influences the degradation of oxidized histones by the 20S proteasome, coupling oxidized-substrate recognition to protein turnover.
Can CRISPR be used to study oxidized DNA binding?
Yes, CRISPR knockout, point-mutation, knock-in, and overexpression models can be combined with lesion quantification to test causal roles of candidate genes.
What diseases are linked to oxidative DNA damage?
Oxidative DNA damage is studied in cancer and mutagenesis, neurodegeneration-related proteostasis, and hyperoxic bronchopulmonary dysplasia where senescence contributes to progression.
Conclusion
GO:0032356 oxidized DNA binding defines the molecular recognition of DNA regions that contain oxidized residues, most notably 8-hydroxy-2'-deoxyguanosine, a promutagenic lesion measured by quantitative immunoanalysis. This function sits at the intersection of oxidative stress biology, DNA repair, mutagenesis, and proteostasis, with redox regulation and DNA-binding proteins shaping where oxidized residues form and how they are recognized. Connections to NFE2L2/NRF2-dependent autophagy regulation and to 20S proteasome degradation of oxidized histones show that oxidized DNA binding is embedded in broader cellular damage-handling networks. Disease contexts such as cancer and hyperoxic bronchopulmonary dysplasia provide experimental settings in which this function can be studied with genetic models and quantitative lesion readouts. Researchers can now use CRISPR knockout, point-mutation, knock-in, overexpression, and screening approaches to establish causal links between candidate genes and oxidized DNA binding biology.
References
- 1. Pajares M et al.. 2018. Transcription factor NFE2L2/NRF2 modulates chaperone-mediated autophagy through the regulation of LAMP2A.. Autophagy 14(8):1310-1322 PMID: 29950142
- 2. Jing X et al.. 2024. Cellular Senescence Contributes to the Progression of Hyperoxic Bronchopulmonary Dysplasia.. Am J Respir Cell Mol Biol 70(2):94-109 PMID: 37874230
- 3. Ullrich O et al.. 1999. Influence of DNA binding on the degradation of oxidized histones by the 20S proteasome.. Arch Biochem Biophys 362(2):211-6 PMID: 9989929
- 4. Rajski SR et al.. 2001. How different DNA-binding proteins affect long-range oxidative damage to DNA.. Biochemistry 40(18):5556-64 PMID: 11331021
- 5. Yousuf S et al.. 2022. Biophysical binding profile with ct-DNA and cytotoxic studies of a modulated nanoconjugate of umbelliferone cobalt oxide loaded on graphene oxide (GO) as drug carrier.. J Biomol Struct Dyn 40(10):4558-4569 PMID: 33331234
- 6. Musarrat J et al.. 1994. Quantitative immunoanalysis of promutagenic 8-hydroxy-2'-deoxyguanosine in oxidized DNA.. Carcinogenesis 15(9):2037-43 PMID: 7923599
- 7. Jones DP. 2008. Radical-free biology of oxidative stress.. Am J Physiol Cell Physiol 295(4):C849-68 PMID: 18684987
- 8. Tsuruta Y et al.. 1985. Peroxidase-catalyzed benzidine binding to DNA and other macromolecules.. Chem Biol Interact 54(2):143-58 PMID: 4028287
