GO:0046386 deoxyribose phosphate catabolic process: DNA Repair Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0046386 describes the biochemical breakdown of deoxyribose phosphate, the phosphorylated sugar 2-deoxy-erythro-pentose, a central intermediate in DNA repair and salvage metabolism.
• The process is executed by deoxyribophosphodiesterases and AP lyases such as NEIL1, NEIL2, and NEIL3, which release deoxyribose phosphate from DNA strand breaks [3,5].
• Deoxyribose phosphate catabolism is a critical step in base excision repair (BER), preventing the accumulation of blocked DNA ends that would otherwise stall repair [1,7].
• In mammalian cells, oxidative DNA-protein crosslinks formed by abasic site lyases can generate deoxyribose phosphate adducts, linking this catabolic process to oxidative stress responses.
• The bacterial and fungal enzyme 2-deoxy-D-ribose-5-phosphate aldolase (DERA) catalyzes a related aldol cleavage of deoxyribose phosphate, and engineered DERAs are used in industrial biosynthesis of (R)-1,3-butanediol [4,6].
• Dysregulation of deoxyribose phosphate metabolism is implicated in cancer metabolism and chemoresistance, making it a target for experimental modeling.
Description
Deoxyribose phosphate catabolic process (GO:0046386) is defined as the chemical reactions and pathways resulting in the breakdown of deoxyribose phosphate, the phosphorylated sugar 2-deoxy-erythro-pentose. This process is essential for maintaining genomic integrity because deoxyribose phosphate is a common intermediate generated during base excision repair (BER) when damaged or inappropriate bases are removed from DNA [1,7]. If not efficiently catabolized, deoxyribose phosphate can remain covalently attached to DNA strand breaks, forming blocked ends that interfere with downstream repair and replication. The study of this process has revealed specialized enzymes, including deoxyribophosphodiesterases and endonuclease VIII-like proteins, that cleave deoxyribose phosphate from DNA [3,5]. In addition to its role in DNA repair, deoxyribose phosphate catabolism intersects with cellular metabolism through enzymes such as 2-deoxy-D-ribose-5-phosphate aldolase (DERA), which catalyzes the reversible cleavage of deoxyribose phosphate into glyceraldehyde-3-phosphate and acetaldehyde [4,6]. This dual role makes GO:0046386 a research focal point for understanding DNA repair, oxidative stress responses, and metabolic reprogramming in cancer [2,8].
deoxyribose phosphate catabolic process At A Glance
| GO ID | GO:0046386 |
|---|---|
| GO term | deoxyribose phosphate catabolic process |
| Ontology | biological_process |
| Synonym | deoxyribose phosphate breakdown; deoxyribose phosphate catabolism; deoxyribose phosphate degradation |
| Major function | Breakdown of deoxyribose phosphate, a phosphorylated sugar intermediate in DNA repair and salvage |
| Key enzymes | Deoxyribophosphodiesterases, NEIL1/2/3, DERA |
| Cellular context | Nucleus and cytoplasm; base excision repair and metabolic pathways |
| Related pathways | Base excision repair, oxidative stress response, pentose phosphate pathway |
What Is GO:0046386?
In our own words, GO:0046386 encompasses the enzymatic steps that degrade deoxyribose phosphate, a sugar-phosphate molecule derived from the deoxyribose backbone of DNA. This breakdown can occur through hydrolysis by deoxyribophosphodiesterases or through lyase-mediated cleavage by enzymes such as NEIL1, NEIL2, and NEIL3, releasing the sugar-phosphate moiety from DNA strand breaks [3,5]. The process is part of the broader base excision repair pathway and also includes the aldolase-mediated cleavage of deoxyribose phosphate in metabolic contexts [4,6].
Why Is deoxyribose phosphate catabolic process Important in Cell Biology?
Deoxyribose phosphate catabolic process is important because it ensures the completion of base excision repair and prevents the accumulation of toxic DNA repair intermediates that can lead to mutations, cell death, or genomic instability [1,7]. Defects in this process are associated with increased sensitivity to DNA-damaging agents and have been linked to cancer predisposition and metabolic disorders [2,8]. Understanding the enzymes and regulatory mechanisms of deoxyribose phosphate catabolism provides insights into chemoresistance and identifies potential therapeutic targets.
• Maintains genomic integrity by removing deoxyribose phosphate from DNA strand breaks during base excision repair.
• Prevents the formation of blocked DNA ends that inhibit repair and replication.
• Enzymes such as NEIL1, NEIL2, and NEIL3 exhibit deoxyribophosphate lyase activity, directly linking them to this catabolic process.
• Oxidative stress can generate DNA-protein crosslinks involving abasic site lyases, implicating deoxyribose phosphate catabolism in oxidative damage responses.
• DERA-mediated cleavage of deoxyribose phosphate is exploited in industrial biotechnology for the synthesis of (R)-1,3-butanediol.
• Altered deoxyribose phosphate metabolism is observed in cancer cells, where it supports metabolic reprogramming and survival.
• Deficiencies in deoxyribose phosphate catabolism can sensitize cells to radiation and chemotherapy.
• The process is conserved from bacteria to humans, making model organisms valuable for mechanistic studies.
• Research on this pathway informs the development of inhibitors that could enhance cancer therapy.
• It connects DNA repair with central carbon metabolism, highlighting the interplay between genome maintenance and metabolic pathways [4,6].
What Happens During deoxyribose phosphate catabolic process?
Generation of deoxyribose phosphate intermediates
In simple terms: First, damaged DNA bases are removed, leaving a sugar-phosphate piece that must be cleaned up.
During base excision repair, DNA glycosylases remove damaged bases, creating apurinic/apyrimidinic (AP) sites. AP endonucleases then incise the DNA, generating a strand break with a 5'-deoxyribose phosphate (dRP) residue [1,7]. This dRP intermediate is the substrate for the catabolic process GO:0046386.
Deoxyribophosphodiesterase activity
In simple terms: Special enzymes cut the sugar-phosphate off the DNA end.
Deoxyribophosphodiesterases (dRPDases) hydrolyze the phosphodiester bond between the dRP moiety and the DNA, releasing free deoxyribose phosphate. This step is essential for creating a clean DNA end that can be further processed by DNA polymerase β and ligase.
Lyase-mediated cleavage by NEIL proteins
In simple terms: Other enzymes, called lyases, can also remove the sugar-phosphate by breaking a different bond.
Mammalian endonuclease VIII-like proteins NEIL1, NEIL2, and NEIL3 possess deoxyribophosphate lyase activity, which cleaves the dRP residue via a β-elimination mechanism, leaving a phosphate group at the DNA terminus. This provides an alternative route for deoxyribose phosphate catabolism.
Aldolase-mediated cleavage of deoxyribose phosphate
In simple terms: In a metabolic context, an enzyme called DERA splits deoxyribose phosphate into smaller molecules.
2-Deoxy-D-ribose-5-phosphate aldolase (DERA) catalyzes the reversible aldol cleavage of deoxyribose phosphate to glyceraldehyde-3-phosphate and acetaldehyde [4,6]. This reaction is part of the pentose phosphate pathway and is exploited in biotechnology for the synthesis of (R)-1,3-butanediol.
Oxidative DNA-protein crosslink formation
In simple terms: Under oxidative stress, the enzymes that process deoxyribose phosphate can become trapped on DNA, forming crosslinks.
Abasic site lyases involved in deoxyribose phosphate catabolism can form covalent DNA-protein crosslinks in the presence of oxidative stress, as demonstrated for NEIL proteins and other BER enzymes. These crosslinks can interfere with DNA repair and are implicated in cellular toxicity.
Key Genes Involved in GO:0046386 deoxyribose phosphate catabolic process
The following genes and proteins are experimentally implicated in deoxyribose phosphate catabolic process (GO:0046386) or its regulation.
| Gene | Major Role | Research Relevance |
|---|---|---|
| NEIL1 | Deoxyribophosphate lyase; removes dRP from DNA strand breaks | Knockout models show sensitivity to oxidative DNA damage |
| NEIL2 | Deoxyribophosphate lyase; involved in transcription-coupled repair | Plays a role in removing dRP in transcribed regions |
| NEIL3 | Deoxyribophosphate lyase; preferred substrate is single-strand breaks | Implicated in replication-associated repair |
| POLB | DNA polymerase β; removes dRP via its lyase activity and fills gaps | Key enzyme in base excision repair; structural studies inform inhibitor design |
| APEX1 | AP endonuclease; generates dRP intermediates | Upstream of deoxyribose phosphate catabolism |
| DERA | 2-deoxy-D-ribose-5-phosphate aldolase; cleaves deoxyribose phosphate | Engineered for industrial biosynthesis [4,6] |
| XRCC1 | Scaffold protein in BER; interacts with POLB and ligase | Coordinates repair complex assembly |
| LIG3 | DNA ligase III; seals DNA after dRP removal | Required for completion of BER |
| FEN1 | Flap endonuclease; may process dRP-containing flaps | Backup pathway for dRP removal |
| PARP1 | Poly(ADP-ribose) polymerase; detects strand breaks | Regulates BER and deoxyribose phosphate catabolism |
| OGG1 | 8-oxoguanine glycosylase; initiates BER at oxidized bases | Generates dRP intermediates |
| MUTYH | Adenine glycosylase; removes mispaired adenine | Defects cause colorectal cancer; linked to dRP processing |
| NTHL1 | Endonuclease III-like; bifunctional glycosylase with lyase activity | Produces dRP intermediates |
| TP53 | Tumor suppressor; regulates DNA repair and metabolism | Mutated in many cancers; impacts deoxyribose phosphate metabolism |
| MYC | Oncogene; drives metabolic reprogramming | Links deoxyribose phosphate catabolism to cancer metabolism |
| KRAS | Oncogene; alters glucose metabolism | May influence DERA pathway flux |
| HIF1A | Hypoxia-inducible factor; regulates metabolic genes | Potential regulator of deoxyribose phosphate catabolism under hypoxia |
How Is deoxyribose phosphate catabolic process Regulated?
Deoxyribose phosphate catabolic process is regulated at multiple levels. DNA damage sensors such as PARP1 detect strand breaks and recruit BER enzymes, including those that remove dRP. The expression of NEIL1, NEIL2, and NEIL3 is cell-cycle dependent and induced by oxidative stress. In metabolic contexts, DERA expression is regulated by carbon source availability and hypoxia, linking deoxyribose phosphate catabolism to central metabolism [4,6,8].
deoxyribose phosphate catabolic process and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| NEIL1 | Cancer, oxidative stress sensitivity | NEIL1 knockout cell lines and mouse models |
| POLB | Cancer, chemoresistance | POLB point mutants in isogenic cell lines |
| DERA | Metabolic disorders, cancer metabolism | DERA overexpression and knockout in cancer cell lines [4,8] |
| APEX1 | Neurodegeneration, cancer | APEX1 knockdown in neuronal cells |
| OGG1 | Colorectal cancer, oxidative damage | OGG1 knockout organoids |
Cancer metabolism and chemoresistance
Altered deoxyribose phosphate catabolism contributes to cancer cell survival by supporting DNA repair and metabolic reprogramming. Overexpression of NEIL proteins and DERA has been observed in various cancers, and inhibition of these enzymes sensitizes cells to chemotherapy. The interplay between deoxyribose phosphate catabolism and oncogenic signaling (e.g., MYC, KRAS) is an active area of research.
Neurodegeneration and oxidative stress
Defects in base excision repair, including deoxyribose phosphate removal, are linked to neurodegenerative diseases such as Alzheimer's and Parkinson's, where oxidative DNA damage accumulates [1,2]. NEIL1 and NEIL2 knockout mice show increased sensitivity to oxidative stress, suggesting a neuroprotective role.
Metabolic disorders
DERA deficiency in humans is associated with metabolic abnormalities, although the exact clinical phenotype is still under investigation. The enzyme's role in pentose phosphate pathway flux suggests that deoxyribose phosphate catabolism may influence glucose homeostasis.
From deoxyribose phosphate catabolic process-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does NEIL1 deoxyribophosphate lyase activity prevent oxidative DNA damage? | NEIL1 knockout cell lines and complemented with point mutants |
| How does POLB dRP lyase deficiency affect BER? | POLB knock-in mice with lyase-dead mutation |
| Can DERA be engineered for improved (R)-1,3-butanediol production? | Rational design and overexpression in E. coli |
| What is the role of deoxyribose phosphate catabolism in cancer metabolism? | CRISPR knockout of DERA in cancer cell lines followed by metabolomics |
| Does PARP1 regulate deoxyribose phosphate catabolism? | PARP1 knockout cells treated with DNA-damaging agents |
| How do NEIL proteins form DNA-protein crosslinks? | Tagged knock-in of NEIL1 with crosslink detection |
How to Study the deoxyribose phosphate catabolic process Process
| Method | What It Measures | Typical Application |
|---|---|---|
| dRP lyase assay | Release of deoxyribose phosphate from DNA | Enzyme kinetics and inhibitor screening |
| Mass spectrometry metabolomics | Levels of deoxyribose phosphate and metabolites | Cancer metabolism studies |
| CRISPR knockout | Loss of gene function | Phenotypic analysis of BER genes |
| Site-directed mutagenesis | Specific amino acid contributions | Mechanistic studies of POLB |
| X-ray crystallography | Three-dimensional protein-DNA structures | Understanding catalytic mechanisms |
| Isotope tracing | Metabolic flux through DERA | Biotechnology and cancer metabolism |
| Comet assay | DNA strand breaks and repair intermediates | Assessing BER efficiency |
| Immunofluorescence | Localization of repair proteins | Studying recruitment to damage sites |
Enzymatic assays for deoxyribophosphate lyase activity
Deoxyribophosphate lyase activity is measured using synthetic DNA substrates containing a 5'-dRP residue. Incubation with purified enzymes or cell extracts releases free deoxyribose phosphate, which can be quantified by HPLC or colorimetric assays [3,5].
Metabolomics and flux analysis
Metabolomic profiling by mass spectrometry can detect deoxyribose phosphate and its catabolic products, such as glyceraldehyde-3-phosphate and acetaldehyde. Isotope tracing using 13C-labeled glucose reveals flux through the DERA pathway [4,8].
CRISPR-based knockout and knock-in models
CRISPR/Cas9 is used to generate knockout cell lines for NEIL1, NEIL2, NEIL3, POLB, and DERA to study their roles in deoxyribose phosphate catabolism. Point mutations can be introduced to dissect catalytic residues [3,7].
Structural biology and computational modeling
X-ray crystallography and cryo-EM structures of POLB and NEIL proteins in complex with dRP-containing DNA have elucidated the catalytic mechanisms of deoxyribose phosphate removal. Molecular dynamics simulations complement these studies.
How CRISPR Can Be Used to Study GO:0046386 deoxyribose phosphate catabolic process
Knockout
CRISPR knockout of NEIL1, NEIL2, NEIL3, POLB, or DERA allows researchers to assess their essentiality in deoxyribose phosphate catabolism. Knockout cells often show accumulation of dRP intermediates and increased sensitivity to DNA-damaging agents [3,7].
Point Mutation
Point mutations in catalytic residues of POLB (e.g., lysine to alanine) or NEIL proteins can abolish deoxyribophosphate lyase activity while preserving DNA binding, enabling separation of functions.
Knock-in
Knock-in of tagged versions of NEIL1 or POLB (e.g., GFP or HA) facilitates live-cell imaging and proteomic analysis of deoxyribose phosphate catabolism complexes.
Overexpression
Overexpression of DERA or NEIL proteins in cell lines or bacteria is used to study their biochemical properties, metabolic impact, and potential for industrial biocatalysis [4,6].
How EDITGENE Supports deoxyribose phosphate catabolic process Research
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Frequently Asked Questions About deoxyribose phosphate catabolic process
What is deoxyribose phosphate catabolic process?
It is the biochemical breakdown of deoxyribose phosphate, a sugar-phosphate intermediate in DNA repair and metabolism, defined by GO:0046386.
What genes are involved in deoxyribose phosphate catabolic process?
Key genes include NEIL1, NEIL2, NEIL3, POLB, APEX1, and DERA, which encode enzymes that remove or cleave deoxyribose phosphate [3,5,7].
How is deoxyribose phosphate catabolic process related to DNA repair?
It is a critical step in base excision repair, removing dRP residues from DNA strand breaks to allow repair completion [1,7].
What enzymes catalyze deoxyribose phosphate catabolism?
Deoxyribophosphodiesterases, NEIL proteins (lyases), and DERA catalyze the breakdown of deoxyribose phosphate [3,4,5].
What diseases are associated with defects in deoxyribose phosphate catabolism?
Defects are linked to cancer, neurodegeneration, and metabolic disorders due to impaired DNA repair and oxidative stress [2,8].
How can I study deoxyribose phosphate catabolic process in the lab?
Use CRISPR knockouts, enzymatic assays, metabolomics, and structural biology to investigate the pathway [3,4,7].
What is the role of DERA in deoxyribose phosphate catabolism?
DERA catalyzes the aldol cleavage of deoxyribose phosphate into glyceraldehyde-3-phosphate and acetaldehyde, linking it to metabolism [4,6].
Are there mouse models for deoxyribose phosphate catabolic process?
Yes, knockout mice for NEIL1, NEIL2, and POLB exist and show increased sensitivity to oxidative DNA damage [3,7].
What is the clinical relevance of deoxyribose phosphate catabolism?
It influences chemoresistance and cancer metabolism, making it a potential therapeutic target.
How does oxidative stress affect deoxyribose phosphate catabolism?
Oxidative stress can generate DNA-protein crosslinks involving abasic site lyases, altering the catabolic process.
Conclusion
Deoxyribose phosphate catabolic process (GO:0046386) is a fundamental biological pathway that bridges DNA repair and cellular metabolism. Its enzymes, including NEIL proteins, POLB, and DERA, are critical for maintaining genomic integrity and metabolic homeostasis. Dysregulation of this process is implicated in cancer, neurodegeneration, and metabolic disorders, offering numerous opportunities for therapeutic intervention. Continued research using advanced CRISPR models and multi-omics approaches will further elucidate its mechanistic details and disease relevance.
References
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- 2. Quiñones JL et al.. 2020. Oxidative DNA-protein crosslinks formed in mammalian cells by abasic site lyases involved in DNA repair.. DNA Repair (Amst) 87:102773 PMID: 31945542
- 3. Grin IR et al.. 2006. Deoxyribophosphate lyase activity of mammalian endonuclease VIII-like proteins.. FEBS Lett 580(20):4916-22 PMID: 16920106
- 4. Kim T et al.. 2020. Rational engineering of 2-deoxyribose-5-phosphate aldolases for the biosynthesis of (R)-1,3-butanediol.. J Biol Chem 295(2):597-609 PMID: 31806708
- 5. Franklin WA et al.. 1988. DNA deoxyribophosphodiesterase.. EMBO J 7(11):3617-22 PMID: 2850170
- 6. Haridas M et al.. 2018. 2-Deoxy-D-ribose-5-phosphate aldolase (DERA): applications and modifications.. Appl Microbiol Biotechnol 102(23):9959-9971 PMID: 30284013
- 7. Whitaker AM et al.. 2020. History of DNA polymerase β X-ray crystallography.. DNA Repair (Amst) 93:102928 PMID: 33087265
- 8. Kersten MC et al.. 2026. 2-deoxy-d-ribose: A multifaceted player at the crossroads of cancer metabolism.. Biomed Pharmacother 202:119800 PMID: 42508297
