GO:0045739 positive regulation of DNA repair: Activation Mechanisms, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0045739 (positive regulation of DNA repair) describes any process that activates or increases the frequency, rate or extent of DNA repair, encompassing transcriptional, post-translational and chromatin-level control of repair pathways [1,2,7].
• Key activators include the Hippo/YAP1-TET1 axis, which epigenetically upregulates DNA repair gene programs and drives sorafenib resistance in hepatocellular carcinoma.
• NRF2 acts as a master transcriptional regulator that boosts base excision repair, nucleotide excision repair and homologous recombination under oxidative stress.
• Deubiquitinases such as USP10 and USP3 stabilize core repair factors (PARP1, SMARCA5) and create positive feedback loops that amplify DNA damage repair [3,4].
• The UFL1-PARP1 axis links positive regulation of DNA repair to anti-tumor immunity, highlighting therapeutic opportunities beyond direct DNA repair inhibition.
• Positive regulation of DNA repair is conserved across eukaryotes, as shown by the COP1-ADA2b module controlling double-strand break repair in Arabidopsis.
Description
DNA repair is essential for maintaining genomic integrity, and its dysregulation contributes to cancer, neurodegeneration and aging. GO:0045739, positive regulation of DNA repair, captures the diverse cellular processes that enhance the efficiency or capacity of DNA repair pathways [1,2,7]. This term is critical for researchers because upregulation of repair is a common mechanism of resistance to genotoxic therapies, including chemotherapy and radiotherapy [1,3,4]. Understanding how cells positively regulate DNA repair provides a framework for developing targeted interventions that sensitize tumors to treatment or protect normal tissues from damage. The ontology term encompasses transcriptional activation of repair genes, post-translational stabilization of repair proteins, and chromatin remodeling events that facilitate repair [1,2,3,4,5,6,7,8].
positive regulation of DNA repair At A Glance
| GO ID | GO:0045739 |
|---|---|
| GO term | positive regulation of DNA repair |
| Ontology | biological_process |
| Synonym | activation of DNA repair, stimulation of DNA repair, up regulation of DNA repair, up-regulation of DNA repair, upregulation of DNA repair |
| Major function | Activates or increases the frequency, rate or extent of DNA repair |
| Related processes | DNA repair, DNA damage response, chromatin remodeling, transcription regulation |
| Key regulators | YAP1-TET1, NRF2, USP10, USP3, UFL1, COP1-ADA2b, MePCE |
| Disease relevance | Cancer chemoresistance, genomic instability, therapeutic resistance |
What Is GO:0045739?
According to the Gene Ontology, GO:0045739 (positive regulation of DNA repair) is defined as any process that activates or increases the frequency, rate or extent of DNA repair. This biological process does not perform repair itself but instead regulates the activity, abundance or accessibility of DNA repair machinery. It includes mechanisms such as transcriptional upregulation of repair genes, stabilization of repair proteins via deubiquitination, and epigenetic remodeling that promotes repair factor recruitment [1,2,3,4,7].
Why Is positive regulation of DNA repair Important in Cell Biology?
Positive regulation of DNA repair is a double-edged sword in human health: it protects normal cells from genotoxic stress but also enables cancer cells to survive chemotherapy and radiotherapy by enhancing repair capacity [1,3,4]. Understanding the molecular players that upregulate DNA repair is therefore essential for predicting treatment responses and designing combination therapies that overcome resistance [1,2,3,4,5]. Moreover, this process is conserved across eukaryotes, from plants to humans, underscoring its fundamental biological importance.
• Drives resistance to DNA-damaging chemotherapies such as sorafenib and PARP inhibitors [1,3].
• Enables cancer cells to repair therapy-induced DNA damage, leading to treatment failure [1,4].
• NRF2-mediated upregulation of repair pathways protects against oxidative stress-induced mutagenesis.
• Deubiquitinase-driven stabilization of repair proteins (e.g., USP10-PARP1, USP3-SMARCA5) amplifies repair capacity [3,4].
• Links DNA repair to anti-tumor immunity through the UFL1-PARP1 axis.
• Conserved in plants, where COP1-ADA2b regulates double-strand break repair in response to light.
• Acetylation fine-tunes base excision and strand break repair, providing additional regulatory layers.
• MePCE promotes homologous recombination by coordinating R-loop resolution at double-strand breaks.
• Potential target for radiosensitization and chemosensitization strategies [1,3,4].
• Relevant to aging and neurodegeneration where repair capacity declines [2,7].
What Happens During positive regulation of DNA repair?
Transcriptional Activation of DNA Repair Genes
In simple terms: Cells can turn up the production of repair proteins by activating specific transcription factors.
Positive regulation of DNA repair often begins with transcriptional upregulation of genes encoding repair factors. The Hippo/YAP1-TET1 axis epigenetically activates DNA repair gene programs, leading to increased repair capacity and sorafenib resistance in hepatocellular carcinoma. Similarly, NRF2 acts as a master transcription factor that induces expression of genes involved in base excision repair, nucleotide excision repair and homologous recombination under oxidative stress. This transcriptional boost ensures that repair machinery is abundant when DNA damage occurs.
Post-translational Stabilization of Repair Proteins
In simple terms: Repair proteins can be protected from degradation, making them last longer and work more effectively.
Deubiquitinases play a central role in positively regulating DNA repair by stabilizing key repair factors. The USP10-PARP1 axis forms a deubiquitination-PARylation positive feedback loop that promotes DNA damage repair and affects PARP1 inhibitor efficacy. Similarly, USP3 stabilizes and deubiquitinates SMARCA5, enhancing DNA damage response and chemotherapy resistance in prostate cancer. These post-translational modifications rapidly increase the availability of functional repair proteins without requiring new transcription.
Chromatin Remodeling and R-loop Resolution
In simple terms: The DNA packaging must be loosened and RNA-DNA hybrids resolved to allow repair proteins access to damage sites.
Efficient DNA repair requires chromatin remodeling and resolution of R-loops, which are RNA-DNA hybrids that can block repair. MePCE promotes homologous recombination by coordinating R-loop resolution at DNA double-strand breaks. This step is critical for positive regulation because it ensures that repair factors can physically access damaged DNA. Chromatin modifications, such as acetylation, also fine-tune base excision and strand break repair.
Integration with Cellular Stress Responses
In simple terms: Repair upregulation is coordinated with other stress responses to maintain cell survival.
Positive regulation of DNA repair is integrated with broader stress responses. The UFL1-PARP1 axis links DNA repair to anti-tumor immunity, suggesting that repair upregulation can modulate immune surveillance. In plants, the COP1-ADA2b module mediates light regulation of double-strand break repair, demonstrating environmental integration. These examples highlight that positive regulation of DNA repair is not an isolated process but is embedded in cellular signaling networks.
Key Genes Involved in GO:0045739 positive regulation of DNA repair
The following genes and proteins are experimentally validated regulators of positive regulation of DNA repair (GO:0045739).
| Gene | Major Role | Research Relevance |
|---|---|---|
| YAP1 | Transcriptional co-activator that with TET1 epigenetically upregulates DNA repair genes | Mediates sorafenib resistance in HCC |
| TET1 | DNA demethylase that partners with YAP1 to activate repair gene expression | Epigenetic regulator of repair program |
| NRF2 | Transcription factor inducing antioxidant and DNA repair genes | Master regulator of repair under oxidative stress |
| USP10 | Deubiquitinase stabilizing PARP1 | Promotes repair and affects PARP1 inhibitor efficacy |
| PARP1 | Poly(ADP-ribose) polymerase involved in base excision repair and strand break repair | Target of USP10 and UFL1, key repair factor [3,5] |
| USP3 | Deubiquitinase stabilizing SMARCA5 | Enhances DNA damage response and chemotherapy resistance |
| SMARCA5 | Chromatin remodeler involved in DNA repair | Stabilized by USP3 to promote repair |
| UFL1 | UFM1 ligase that regulates PARP1 | Links repair to anti-tumor immunity |
| COP1 | E3 ubiquitin ligase that regulates ADA2b | Controls light-dependent DSB repair in Arabidopsis |
| ADA2b | Transcriptional adaptor protein | Target of COP1 in DSB repair regulation |
| MePCE | Methyltransferase that coordinates R-loop resolution | Promotes homologous recombination at DSBs |
| SMARCA5 | Chromatin remodeler | Stabilized by USP3 |
| PARP1 | Repair enzyme | Deubiquitinated by USP10 |
| YAP1 | Hippo pathway effector | Drives repair gene program |
| NRF2 | Cap'n'Collar transcription factor | Induces repair genes |
| USP10 | Ubiquitin-specific protease | Stabilizes PARP1 |
| USP3 | Ubiquitin-specific protease | Stabilizes SMARCA5 |
How Is positive regulation of DNA repair Regulated?
Positive regulation of DNA repair is itself tightly regulated at multiple levels. Transcriptional control is mediated by factors such as YAP1-TET1 and NRF2, which respond to cellular stress and epigenetic signals [1,2]. Post-translational regulation involves deubiquitinases (USP10, USP3) that stabilize repair proteins and create positive feedback loops [3,4]. Additionally, acetylation fine-tunes base excision and strand break repair, and R-loop resolution by MePCE ensures efficient homologous recombination. Environmental cues, such as light in plants, can also modulate repair through COP1-ADA2b. This multilayered regulation ensures that DNA repair capacity is matched to the level of damage and cellular context.
positive regulation of DNA repair and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| YAP1 | Hepatocellular carcinoma, sorafenib resistance | HCC cell lines with YAP1 knockout or overexpression |
| USP10 | PARP1 inhibitor resistance | Cancer cell lines with USP10 knockout |
| USP3 | Prostate cancer, chemotherapy resistance | Prostate cancer cells with USP3 knockdown |
| NRF2 | Oxidative stress-related diseases, cancer | NRF2 knockout or overexpression models |
| UFL1 | Anti-tumor immunity | UFL1 knockout mouse models or cell lines |
Cancer Chemoresistance
Positive regulation of DNA repair is a major driver of resistance to chemotherapy and radiotherapy. In hepatocellular carcinoma, the Hippo/YAP1-TET1 axis upregulates DNA repair gene programs, leading to sorafenib resistance. Similarly, USP10-mediated stabilization of PARP1 promotes repair and reduces the efficacy of PARP1 inhibitors. USP3-driven stabilization of SMARCA5 enhances DNA damage response and chemotherapy resistance in prostate cancer. These findings suggest that targeting positive regulators of DNA repair could sensitize tumors to existing therapies.
Genomic Instability and Neurodegeneration
Defects in positive regulation of DNA repair can lead to genomic instability, which is associated with neurodegeneration and aging. NRF2, a key activator of repair genes, protects against oxidative stress-induced DNA damage. Acetylation-mediated fine-tuning of base excision and strand break repair is also critical for neuronal survival. When these regulatory mechanisms fail, accumulation of DNA damage can contribute to neurodegenerative pathologies.
Immune Evasion and Tumor Microenvironment
The UFL1-PARP1 axis links positive regulation of DNA repair to anti-tumor immunity, suggesting that repair upregulation can influence immune recognition of tumors. Targeting this axis may amplify anti-tumor immune responses, providing a rationale for combining DNA repair inhibitors with immunotherapy.
From positive regulation of DNA repair-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does YAP1-TET1 axis drive DNA repair gene expression? | Knockout of YAP1 or TET1 in HCC cells |
| Does USP10 stabilize PARP1 and promote repair? | USP10 knockout or point mutation (catalytic dead) |
| Does USP3-mediated SMARCA5 stabilization enhance repair? | USP3 knockout or overexpression in prostate cancer cells |
| Does NRF2 activate repair genes? | NRF2 knockout or overexpression |
| Does UFL1 regulate PARP1 and immunity? | UFL1 knockout mouse models |
| Does MePCE promote homologous recombination? | MePCE knockout or knockdown |
How to Study the positive regulation of DNA repair Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CRISPR knockout screen | Gene essentiality for DNA repair | Identify novel positive regulators [3,4] |
| RNA-seq | Transcriptional changes in repair genes | Assess YAP1-TET1 or NRF2 activity [1,2] |
| Proteomics | Protein abundance and modifications | Detect USP10-PARP1 stabilization |
| Immunofluorescence | DNA damage foci formation | Measure repair efficiency |
| Comet assay | DNA strand breaks | Quantify repair capacity |
| ChIP-seq | Chromatin binding of repair factors | Map repair factor recruitment |
| R-loop detection | R-loop levels at DSBs | Assess MePCE function |
| Ubiquitination assays | Deubiquitinase activity | Test USP3/USP10 function [3,4] |
CRISPR Knockout Screens
Genome-wide CRISPR knockout screens can identify genes whose loss affects positive regulation of DNA repair. For example, knocking out USP10 or USP3 would test their role in stabilizing PARP1 or SMARCA5, respectively [3,4]. These screens are powerful for discovering novel regulators of DNA repair capacity.
Transcriptional Profiling (RNA-seq)
RNA sequencing can measure changes in DNA repair gene expression upon activation of pathways such as YAP1-TET1 or NRF2 [1,2]. This method reveals the transcriptional programs that underlie positive regulation of DNA repair.
Proteomics and Post-translational Modification Analysis
Mass spectrometry-based proteomics can detect changes in protein abundance and ubiquitination status of repair factors like PARP1 and SMARCA5, providing insights into deubiquitinase-mediated stabilization [3,4].
Imaging of DNA Damage Foci
Immunofluorescence for markers such as γH2AX or RAD51 allows visualization of DNA repair foci and assessment of repair efficiency in cells with manipulated regulators.
How CRISPR Can Be Used to Study GO:0045739 positive regulation of DNA repair
Knockout
CRISPR knockout of positive regulators such as USP10, USP3, YAP1, or NRF2 can abolish their ability to enhance DNA repair, leading to increased sensitivity to DNA-damaging agents [1,2,3,4]. These models are essential for validating causal roles in repair upregulation.
Point Mutation
Introducing catalytic-dead point mutations (e.g., in USP10 or USP3) can distinguish between deubiquitinase activity-dependent and independent functions in positive regulation of DNA repair [3,4].
Knock-in
Knock-in of tagged versions (e.g., GFP or HA) of repair proteins like PARP1 or SMARCA5 allows real-time tracking of their localization and stability in response to regulatory signals [3,4].
Overexpression
Overexpression of YAP1, TET1, or NRF2 can drive excessive DNA repair capacity, modeling chemoresistance and providing a platform for testing inhibitors of positive regulation [1,2].
How EDITGENE Supports positive regulation of DNA repair Research
Researchers studying positive regulation of DNA repair-related genes often need to determine whether a candidate gene is causally involved in enhancing repair capacity. EDITGENE provides comprehensive CRISPR-based services to generate knockout, point-mutation, knock-in, and overexpression cell models, as well as library screening and bioinformatics support, enabling precise functional dissection of GO:0045739 regulators.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of DNA repair research.
Frequently Asked Questions About positive regulation of DNA repair
What is GO:0045739 positive regulation of DNA repair?
GO:0045739 is a Gene Ontology biological process term defined as any process that activates or increases the frequency, rate or extent of DNA repair [1,2,7].
What genes are involved in positive regulation of DNA repair?
Key genes include YAP1, TET1, NRF2, USP10, PARP1, USP3, SMARCA5, UFL1, COP1, ADA2b, and MePCE [1,2,3,4,5,6,8].
How does NRF2 regulate DNA repair?
NRF2 is a transcription factor that induces expression of genes involved in base excision repair, nucleotide excision repair, and homologous recombination under oxidative stress.
What is the role of USP10 in DNA repair?
USP10 deubiquitinates and stabilizes PARP1, forming a positive feedback loop that promotes DNA damage repair and affects PARP1 inhibitor efficacy.
How does USP3 contribute to chemotherapy resistance?
USP3 stabilizes and deubiquitinates SMARCA5, enhancing DNA damage response and chemotherapy resistance in prostate cancer.
What is the UFL1-PARP1 axis?
UFL1 regulates PARP1, and targeting this axis amplifies anti-tumor immunity, linking DNA repair to immune responses.
Is positive regulation of DNA repair conserved in plants?
Yes, the COP1-ADA2b module mediates light regulation of DNA double-strand break repair in Arabidopsis.
How does acetylation affect DNA repair?
Acetylation fine-tunes base excision and strand break repair, providing an additional regulatory layer.
What is the role of MePCE in homologous recombination?
MePCE promotes homologous recombination by coordinating R-loop resolution at DNA double-strand breaks.
How can I study positive regulation of DNA repair using CRISPR?
CRISPR knockout, point mutation, knock-in, and overexpression models can be used to dissect gene function in DNA repair upregulation [1,2,3,4,5,6,7,8].
Conclusion
GO:0045739 (positive regulation of DNA repair) encompasses a diverse set of molecular mechanisms that enhance DNA repair capacity, from transcriptional activation by YAP1-TET1 and NRF2 to post-translational stabilization by USP10 and USP3 [1,2,3,4]. These processes are critical for cancer chemoresistance and are conserved across eukaryotes [1,6]. Targeting positive regulators of DNA repair holds promise for overcoming therapeutic resistance and improving patient outcomes [1,3,4,5]. Continued research using advanced CRISPR models and multi-omics approaches will further illuminate this important biological process.
References
- 1. Mo C et al.. 2024. Epigenetic regulation of DNA repair gene program by Hippo/YAP1-TET1 axis mediates sorafenib resistance in HCC.. Cell Mol Life Sci 81(1):284 PMID: 38967794
- 2. Li J et al.. 2023. Roles of NRF2 in DNA damage repair.. Cell Oncol (Dordr) 46(6):1577-1593 PMID: 37365451
- 3. Liu J et al.. 2025. The deubiquitination-PARylation positive feedback loop of the USP10-PARP1 axis promotes DNA damage repair and affects therapeutic efficacy of PARP1 inhibitor.. Oncogene 44(29):2515-2529 PMID: 40316740
- 4. Li S et al.. 2024. USP3 promotes DNA damage response and chemotherapy resistance through stabilizing and deubiquitinating SMARCA5 in prostate cancer.. Cell Death Dis 15(11):790 PMID: 39500888
- 5. Song W et al.. 2025. Targeting the UFL1-PARP1 axis amplifies anti-tumor immunity.. Cell Rep 44(10):116433 PMID: 41105513
- 6. Chen L et al.. 2026. The COP1-ADA2b module mediates light regulation of DNA double-strand break repair in Arabidopsis.. Nat Commun 17(1) PMID: 41820379
- 7. Bhakat KK et al.. 2020. Fine-tuning of DNA base excision/strand break repair via acetylation.. DNA Repair (Amst) 93:102931 PMID: 33087268
- 8. Devanathan SK et al.. 2025. MePCE promotes homologous recombination through coordinating R-loop resolution at DNA double-stranded breaks.. Cell Rep 44(6):115740 PMID: 40411785
