GO:0140664 ATP-dependent DNA damage sensor activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0140664 ATP-dependent DNA damage sensor activity describes a molecular function in which a protein uses ATP hydrolysis to recognize toxic DNA structures and initiate a signaling response.
• Key sensor complexes include Mre11:Rad50, which forms an ATP-dependent molecular clamp at DNA double-strand breaks, and the RSC chromatin remodeler, which acts as an early double-strand-break sensor.
• The function is conserved from bacteria to humans, with RecA-mediated SOS activation in bacteria and FANCM-dependent Fanconi anemia pathway activation in humans.
• ATP-dependent DNA damage sensors are critical for genome maintenance, and their dysfunction is linked to cancer predisposition, chemotherapy resistance, and developmental disorders [1,3].
• Studying this activity requires integrated approaches including structural biology, kinetic ATPase assays, and CRISPR-based gene editing to dissect sensor function in cells [1,3,4].
• EDITGENE provides CRISPR knockout, point-mutation, knock-in, overexpression cell models and library screening to accelerate research on ATP-dependent DNA damage sensor activity [1,2,3].
Description
ATP-dependent DNA damage sensor activity (GO:0140664) is a molecular function that enables a protein to recognize toxic DNA structures and initiate a signaling response through ATP hydrolysis. This activity is fundamental to the DNA damage response, allowing cells to detect lesions such as double-strand breaks, stalled replication forks, and interstrand crosslinks, and to activate repair or checkpoint pathways [1,2]. The QuickGO definition emphasizes that the sensor itself must couple ATP hydrolysis to the recognition event, distinguishing it from passive DNA-binding proteins. Researchers study this term to understand how cells maintain genomic integrity and how defects in sensing contribute to diseases including cancer and Fanconi anemia [1,3]. The function is exemplified by the Mre11:Rad50 complex, which forms an ATP-dependent molecular clamp that tethers DNA ends during double-strand break repair, and by the RSC chromatin remodeling complex, which functions as an early double-strand-break sensor in yeast. In bacteria, the RecA protein uses ATP to form a nucleoprotein filament that activates the SOS response upon DNA damage. These diverse examples highlight the evolutionary conservation and mechanistic versatility of ATP-dependent DNA damage sensing [1,2,3,4].
ATP-dependent DNA damage sensor activity At A Glance
| GO ID | GO:0140664 |
|---|---|
| GO term | ATP-dependent DNA damage sensor activity |
| Ontology | molecular_function |
| Synonym | ATP-dependent DNA damage sensing activity |
| Major function | Recognizes toxic DNA structures and initiates a signaling response driven by ATP hydrolysis. |
| Example protein complex | Mre11:Rad50 forms an ATP-dependent molecular clamp at DNA double-strand breaks. |
| Example chromatin sensor | RSC functions as an early double-strand-break sensor in yeast. |
| Bacterial example | RecA mediates ATP-dependent SOS activation upon DNA damage. |
| Human disease link | FANCM-dependent Fanconi anemia pathway activation involves ATP-dependent DNA sensing. |
What Is GO:0140664?
ATP-dependent DNA damage sensor activity (GO:0140664) is defined as a molecule that recognizes toxic DNA structures and initiates a signaling response, driven by ATP hydrolysis. In other words, the sensor protein must bind to damaged DNA or abnormal DNA structures and then use the energy of ATP hydrolysis to trigger downstream signaling, such as checkpoint activation or repair pathway recruitment [1,3]. This definition excludes proteins that merely bind DNA damage without ATP-dependent signaling, and it emphasizes the coupling of damage recognition to an active, energy-consuming response.
Why Is ATP-dependent DNA damage sensor activity Important in Cell Biology?
ATP-dependent DNA damage sensor activity is essential for maintaining genome stability because it provides the first line of defense against DNA lesions that can cause mutations, chromosomal rearrangements, and cell death [1,2,3]. Defects in this activity are associated with human diseases including Fanconi anemia, a genome instability disorder caused by mutations in genes such as FANCM, and with cancer predisposition due to impaired double-strand break repair. Understanding this function also has therapeutic implications, as inhibitors of ATP-dependent DNA damage sensors are being explored to sensitize cancer cells to chemotherapy and radiotherapy [1,3].
• Enables rapid detection of DNA double-strand breaks through ATP-dependent molecular clamps such as Mre11:Rad50.
• Coordinates early signaling events that recruit repair factors and activate cell cycle checkpoints.
• Is conserved in bacteria, where RecA-mediated ATP-dependent sensing activates the SOS response.
• Plays a critical role in the Fanconi anemia pathway, with FANCM as a key ATP-dependent sensor.
• Dysfunction leads to genomic instability, a hallmark of cancer and premature aging [1,3].
• Provides targets for cancer therapy, as inhibiting ATP-dependent sensors can enhance chemosensitivity [1,3].
• Involved in chromatin remodeling at damage sites, as shown for the RSC complex.
• Requires ATP hydrolysis, making it amenable to kinetic and structural studies [3,4].
• Links DNA damage sensing to oxidative stress responses through proteins such as Cockayne syndrome protein B.
• Can be studied using engineered RecA constructs to define minimal activation complexes.
What Happens During ATP-dependent DNA damage sensor activity?
Damage recognition and ATP-dependent clamp formation
In simple terms: The sensor protein finds broken DNA and uses ATP to grab onto it tightly.
The first step in ATP-dependent DNA damage sensing is the recognition of toxic DNA structures, such as double-strand breaks. The Mre11:Rad50 complex undergoes a conformational change upon ATP binding that allows it to form a molecular clamp, tethering DNA ends and initiating repair signaling. This ATP-dependent clamp formation is a hallmark of the sensor activity, as it couples nucleotide hydrolysis to the physical capture of damaged DNA.
Signaling initiation and checkpoint activation
In simple terms: Once the sensor holds the damaged DNA, it sends a signal to stop the cell cycle and call repair proteins.
After recognizing damage, ATP-dependent sensors initiate signaling cascades. In yeast, the RSC chromatin remodeling complex functions as an early double-strand-break sensor that recruits repair factors and modifies chromatin to facilitate access. In bacteria, RecA forms an ATP-dependent nucleoprotein filament on single-stranded DNA, which activates the SOS response by promoting LexA autoproteolysis. These signaling events are driven by ATP hydrolysis and are essential for coordinating the cellular response to DNA damage [2,4].
Chromatin remodeling and repair factor recruitment
In simple terms: The sensor also helps open up the chromatin so repair proteins can reach the damage.
ATP-dependent DNA damage sensors often couple damage recognition to chromatin remodeling. The RSC complex uses ATP hydrolysis to slide nucleosomes and expose DNA lesions, facilitating repair. Similarly, the Fanconi anemia pathway requires FANCM, an ATP-dependent DNA translocase, to recognize interstrand crosslinks and initiate repair. These activities ensure that repair machinery can access damaged sites within the context of chromatin [1,2].
Regulation by post-translational modifications
In simple terms: Chemical tags on sensor proteins can turn their activity up or down.
ATP-dependent DNA damage sensor activity is regulated by post-translational modifications. For example, UV radiation induces SUMOylation of DDB2, which regulates nucleotide excision repair. Phosphorylation of Williams syndrome transcription factor by MAPK induces a switch between two distinct chromatin remodeling complexes, modulating damage sensing. These modifications fine-tune sensor activity in response to cellular signals [7,8].
Interplay with poly(ADP-ribose) polymerase 1
In simple terms: Sensors work together with other damage response proteins like PARP1.
ATP-dependent DNA damage sensors dynamically interact with other repair proteins. Cockayne syndrome protein B (CSB) shows a dynamic interplay with poly(ADP-ribose) polymerase 1 (PARP1) during oxidative DNA damage repair. This interaction modulates the sensor's activity and coordinates repair pathways.
Key Genes Involved in GO:0140664 ATP-dependent DNA damage sensor activity
The following genes and proteins are experimentally implicated in ATP-dependent DNA damage sensor activity, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| MRE11 | Forms ATP-dependent molecular clamp with RAD50 at double-strand breaks | Structural and biochemical studies of DNA end tethering |
| RAD50 | ATP-binding subunit of Mre11:Rad50 complex | Mutations linked to cancer predisposition and repair defects |
| FANCM | ATP-dependent DNA translocase that activates Fanconi anemia pathway | Target for Fanconi anemia research and cancer therapy |
| RSC complex (e.g., STH1) | Early double-strand-break sensor in yeast | Chromatin remodeling and damage signaling studies |
| RecA | ATP-dependent nucleoprotein filament that activates SOS response | Bacterial DNA repair and engineered sensor constructs |
| DDB2 | UV-induced SUMOylation regulates nucleotide excision repair | Studies of post-translational regulation of damage sensing |
| CSB (ERCC6) | Interacts with PARP1 during oxidative DNA damage repair | Role in Cockayne syndrome and oxidative stress |
| WSTF (BAZ1B) | Phosphorylation by MAPK switches chromatin remodeling complexes | Williams syndrome and chromatin dynamics |
| PARP1 | Poly(ADP-ribose) polymerase that interacts with CSB | Oxidative DNA damage repair and sensor coordination |
| LEXA | Bacterial repressor cleaved upon RecA activation | SOS response regulation |
| RAD51 | Downstream recombinase in double-strand break repair | Homologous recombination studies |
| ATM | Checkpoint kinase activated by double-strand breaks | DNA damage signaling |
| ATR | Checkpoint kinase responding to replication stress | Fanconi anemia pathway crosstalk |
| BRCA1 | Repair factor recruited to damage sites | Cancer predisposition and therapy |
| BRCA2 | Homologous recombination mediator | Fanconi anemia and cancer |
| FANCD2 | Monoubiquitinated in Fanconi anemia pathway | Diagnostic marker for Fanconi anemia |
| H2AX | Histone variant phosphorylated at damage sites | Damage signaling marker |
| 53BP1 | Damage response adaptor protein | Checkpoint and repair studies |
How Is ATP-dependent DNA damage sensor activity Regulated?
ATP-dependent DNA damage sensor activity is regulated at multiple levels. Post-translational modifications such as SUMOylation of DDB2 following UV radiation modulate nucleotide excision repair. Phosphorylation of Williams syndrome transcription factor by MAPK induces a switch between two distinct chromatin remodeling complexes, affecting damage sensing. Additionally, the interaction between Cockayne syndrome protein B and PARP1 is dynamically regulated during oxidative DNA damage repair. These regulatory mechanisms ensure that sensor activity is tightly controlled in response to specific types of DNA damage and cellular contexts [5,7,8].
ATP-dependent DNA damage sensor activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| FANCM | Fanconi anemia | Knockout cell lines and patient-derived fibroblasts |
| MRE11 | Cancer predisposition and ataxia-telangiectasia-like disorder | Point-mutation knock-in mice and cell lines |
| RAD50 | Cancer predisposition | CRISPR knockout in human cell lines |
| CSB (ERCC6) | Cockayne syndrome | Knockout and oxidative stress models |
| DDB2 | Xeroderma pigmentosum group E | UV irradiation and SUMOylation studies |
Fanconi anemia and bone marrow failure
Fanconi anemia is a genome instability disorder characterized by bone marrow failure, developmental abnormalities, and cancer predisposition. The Fanconi anemia pathway is activated by FANCM, an ATP-dependent DNA damage sensor that recognizes interstrand crosslinks and initiates repair. Structural studies have revealed the basis of FANCM-dependent pathway activation, highlighting the importance of ATP-dependent sensing in disease pathogenesis.
Cancer predisposition and therapy resistance
Defects in ATP-dependent DNA damage sensors such as the Mre11:Rad50 complex lead to impaired double-strand break repair, genomic instability, and increased cancer risk. Conversely, cancer cells can become dependent on specific sensor pathways, making them targets for therapeutic inhibition to sensitize tumors to chemotherapy and radiotherapy [1,3].
Neurodegeneration and oxidative stress
Oxidative DNA damage is implicated in neurodegenerative diseases. Cockayne syndrome protein B (CSB) interacts with PARP1 during oxidative DNA damage repair, and mutations in CSB cause Cockayne syndrome, a premature aging disorder with neurological features. This highlights the role of ATP-dependent sensor activity in protecting neurons from oxidative damage.
From ATP-dependent DNA damage sensor activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of FANCM abolish ATP-dependent DNA damage sensing? | FANCM knockout cell line |
| How does a point mutation in MRE11 ATP-binding site affect clamp formation? | MRE11 point-mutation knock-in |
| Can a tagged RAD50 be used to monitor complex assembly at damage sites? | Tagged knock-in of RAD50 |
| Does overexpression of RecA enhance SOS response? | RecA overexpression in bacteria |
| What is the effect of DDB2 SUMOylation on nucleotide excision repair? | DDB2 point-mutation (SUMO site) knock-in |
| Can CRISPR library screening identify novel ATP-dependent DNA damage sensors? | Genome-wide knockout library screening [1,2] |
How to Study the ATP-dependent DNA damage sensor activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Cryo-EM | 3D structure of sensor-DNA complexes | Visualizing ATP-dependent clamp formation |
| ATPase assay | Rate of ATP hydrolysis | Testing sensor activity in vitro |
| EMSA | DNA binding affinity | Assessing damage recognition |
| gamma-H2AX immunofluorescence | DNA damage foci | Monitoring sensor activation in cells |
| Comet assay | DNA strand breaks | Quantifying damage and repair |
| CRISPR knockout screen | Gene essentiality for damage sensing | Discovering novel sensors |
| SUMOylation assay | Post-translational modification | Studying DDB2 regulation |
| Phosphorylation Western blot | Kinase activity | Analyzing WSTF regulation |
Structural biology (cryo-EM and X-ray crystallography)
Structural studies have revealed how ATP-dependent DNA damage sensors such as the Mre11:Rad50 complex form molecular clamps upon ATP binding. Cryo-EM and X-ray crystallography are essential for visualizing conformational changes and DNA binding interfaces [1,3].
Biochemical ATPase and DNA binding assays
Kinetic ATPase assays measure the rate of ATP hydrolysis by sensor proteins, while electrophoretic mobility shift assays (EMSAs) assess DNA binding affinity [3,4]. These methods are used to dissect the coupling between ATP hydrolysis and damage recognition.
Cell-based DNA damage response assays
Immunofluorescence for markers such as gamma-H2AX and 53BP1 foci allows quantification of sensor activation in cells. Comet assays and pulsed-field gel electrophoresis measure DNA break induction and repair.
CRISPR-based genetic screens
Genome-wide CRISPR knockout screens can identify genes required for ATP-dependent DNA damage sensing and repair [1,2]. These screens are powerful for discovering novel sensors and pathway components.
How CRISPR Can Be Used to Study GO:0140664 ATP-dependent DNA damage sensor activity
Knockout
CRISPR knockout of genes encoding ATP-dependent DNA damage sensors, such as FANCM or MRE11, allows researchers to assess loss-of-function phenotypes including impaired DNA repair, increased sensitivity to DNA-damaging agents, and genomic instability [1,3]. Knockout cell lines are valuable for validating sensor requirements in specific repair pathways.
Point Mutation
Introducing point mutations in ATP-binding domains of sensor proteins, such as the Walker A motif of RAD50 or MRE11, enables precise dissection of ATP hydrolysis-dependent functions without abolishing protein expression. These models are critical for separating ATP-dependent sensing from structural roles.
Knock-in
Knock-in of epitope tags (e.g., GFP, HA) or fluorescent reporters into endogenous sensor genes allows real-time imaging of protein localization and dynamics at damage sites. Tagged knock-in models are also useful for proteomic analysis of sensor complexes.
Overexpression
Overexpression of wild-type or mutant sensor proteins, such as RecA or FANCM, can be used to study gain-of-function effects, dominant-negative phenotypes, and pathway activation [1,4]. Overexpression models are particularly useful in bacterial systems for SOS response studies.
How EDITGENE Supports ATP-dependent DNA damage sensor activity Research
Researchers studying ATP-dependent DNA damage sensor activity-related genes often need to determine whether a candidate gene is causally involved in damage recognition, signaling, or repair. EDITGENE provides a comprehensive suite of CRISPR-based services to generate precisely engineered cell models, enabling functional validation of sensor proteins in physiologically relevant contexts [1,2,3].
Contact EDITGENE today to design your custom CRISPR model for ATP-dependent DNA damage sensor activity research.
Frequently Asked Questions About ATP-dependent DNA damage sensor activity
What is ATP-dependent DNA damage sensor activity?
It is a molecular function (GO:0140664) in which a protein uses ATP hydrolysis to recognize toxic DNA structures and initiate a signaling response.
What genes are involved in ATP-dependent DNA damage sensor activity?
Key genes include MRE11, RAD50, FANCM, RSC complex subunits, RecA, DDB2, CSB, and WSTF [1,2,3,4,5,7,8].
How does the Mre11:Rad50 complex sense DNA damage?
It forms an ATP-dependent molecular clamp that tethers DNA ends at double-strand breaks, initiating repair signaling.
What is the role of FANCM in DNA damage sensing?
FANCM is an ATP-dependent DNA translocase that recognizes interstrand crosslinks and activates the Fanconi anemia pathway.
How is ATP-dependent DNA damage sensor activity regulated?
It is regulated by post-translational modifications such as SUMOylation of DDB2 and phosphorylation of WSTF [7,8].
What diseases are linked to defects in ATP-dependent DNA damage sensors?
Fanconi anemia, cancer predisposition, and Cockayne syndrome are associated with defects in these sensors [1,3,5].
What methods are used to study ATP-dependent DNA damage sensor activity?
Methods include cryo-EM, ATPase assays, EMSA, immunofluorescence, comet assays, and CRISPR screens [1,2,3,7].
Can CRISPR be used to study ATP-dependent DNA damage sensors?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models are widely used to dissect sensor function [1,3,4].
What is the difference between ATP-dependent and ATP-independent DNA damage sensors?
ATP-dependent sensors couple damage recognition to ATP hydrolysis for signaling, whereas ATP-independent sensors bind damage without consuming ATP.
How can EDITGENE help with my research on ATP-dependent DNA damage sensor activity?
EDITGENE provides custom CRISPR cell models, library screening, and bioinformatics to study genes involved in this function [1,2,3].
Conclusion
ATP-dependent DNA damage sensor activity (GO:0140664) is a fundamental molecular function that couples ATP hydrolysis to the recognition of toxic DNA structures and the initiation of signaling responses. From the Mre11:Rad50 clamp in double-strand break repair to FANCM in the Fanconi anemia pathway and RecA in bacterial SOS, these sensors are essential for genome maintenance. Understanding their mechanisms offers insights into cancer, Fanconi anemia, and other genome instability disorders, and provides opportunities for therapeutic intervention [1,3]. Continued research using advanced CRISPR models and structural approaches will further illuminate this critical activity [1,2,3,4].
References
- 1. Bythell-Douglas R et al.. 2025. Structural basis of Fanconi anemia pathway activation by FANCM.. EMBO J 44(14):4013-4036 PMID: 40447800
- 2. Liang B et al.. 2007. RSC functions as an early double-strand-break sensor in the cell's response to DNA damage.. Curr Biol 17(16):1432-7 PMID: 17689960
- 3. Lammens K et al.. 2011. The Mre11:Rad50 structure shows an ATP-dependent molecular clamp in DNA double-strand break repair.. Cell 145(1):54-66 PMID: 21458667
- 4. Cory MB et al.. 2022. Engineered RecA Constructs Reveal the Minimal SOS Activation Complex.. Biochemistry 61(24):2884-2896 PMID: 36473084
- 5. Lake RJ et al.. 2022. Dynamic Interplay between Cockayne Syndrome Protein B and Poly(ADP-Ribose) Polymerase 1 during Oxidative DNA Damage Repair.. Biomedicines 10(2) PMID: 35203571
- 7. Han C et al.. 2017. UV radiation-induced SUMOylation of DDB2 regulates nucleotide excision repair.. Carcinogenesis 38(10):976-985 PMID: 28981631
- 8. Oya H et al.. 2009. Phosphorylation of Williams syndrome transcription factor by MAPK induces a switching between two distinct chromatin remodeling complexes.. J Biol Chem 284(47):32472-82 PMID: 19776015
