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Updated: Jun 7, 2025
10:59
Visualizing and Quantifying Endonuclease-Based Site-Specific DNA Damage
Published on: August 21, 2021
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TEX264-mediated selective autophagy directs DNA damage repair
1School of Biological Sciences, Nanyang Technological University, Singapore.
Trends in Biochemical Sciences
|November 16, 2024
Summary
DNA damage can cause disease, but a new study shows lysosomes aid repair. Lysosomes degrade topoisomerase 1 cleavage complex lesions through TEX264-mediated selective autophagy, revealing a novel DNA repair pathway.
Area of Science:
- Molecular Biology
- Cell Biology
- Genetics
Background:
- DNA damage is a significant cause of mutations and diseases.
- DNA repair primarily occurs in the nucleus.
- The role of other organelles in DNA repair is less understood.
Purpose of the Study:
- To investigate the role of lysosomes in DNA repair.
- To identify mechanisms for clearing DNA lesions outside the nucleus.
Main Methods:
- Utilized cell-based assays to study DNA damage and repair.
- Investigated the role of TEX264 in DNA lesion degradation.
- Examined the involvement of selective autophagy in DNA repair.
Main Results:
- Demonstrated that topoisomerase 1 cleavage complex (TOP1cc) DNA lesions can be degraded in lysosomes.
- Showed that TEX264 mediates the selective autophagy of TOP1cc lesions.
- Identified a novel lysosomal DNA repair pathway.
Conclusions:
- Lysosomes play a previously unrecognized role in DNA repair.
- TEX264-mediated selective autophagy is a key mechanism for clearing TOP1cc lesions.
- This discovery opens new avenues for understanding and treating diseases associated with DNA damage.
Keywords:
DNA repairTEX264colorectal cancergenome stabilityselective autophagytopoisomerase 1 cleavage complexMore Related Videos
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