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Updated: Jan 21, 2026

Two- and Three-Dimensional Live Cell Imaging of DNA Damage Response Proteins
Published on: September 28, 2012
Essential Role of Ubiquitin-Fold Modifier 1 Conjugation in DNA Damage Response
1Jiangxi Medical College, Nanchang University, Nanchang, China.
Abstract:
Both endogenous and exogenous factors can cause DNA damage that compromises genomic integrity and cell viability. A proper DNA damage response (DDR) plays a role in maintaining genome stability and preventing tumorigenesis. DNA double-strand breaks (DSBs) are the most toxic DNA lesion, whose response is dominated by the ataxia-telangiectasia mutated (ATM) protein kinase. After being activated by the sensor Mre11-Rad50-Nbs1 (MRN) complex or acetyltransferase Tip60, ATM rapidly phosphorylates downstream targets to launch DDR signaling when DNA is damaged. However, the exact mechanism of DDR is complex and ambiguous. Ufmylation, one type of ubiquitin-like modification, proceeds mainly through a three-step enzymatic reaction to help ubiquitin-fold modifier 1 (Ufm1), attach to substrates with ubiquitin-like modifier-activating enzyme 5 (Uba5), Ufm1-conjugating enzyme 1 (Ufc1) and Ufm1-specific ligase 1 (Ufl1). Although ubiquitination is essential to the DSBs response, the potential function of ufmylation in DDR is largely unknown. Herein, we review the relationship between ufmylation and DDR to elucidate the function and mechanism of ufmylation in DDR, which would reveal the pathogenesis of some diseases and provide new guidance to create a therapeutic method.
Insights
Ufmylation, a modification process, is explored for its role in the DNA damage response (DDR). Understanding ufmylation
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- DNA damage can compromise genomic integrity and cell viability, necessitating a robust DNA damage response (DDR).
- The ataxia-telangiectasia mutated (ATM) kinase is central to the DDR, particularly for DNA double-strand breaks (DSBs).
- Ufmylation is a ubiquitin-like modification process involving Uba5, Ufc1, and Ufl1, but its role in DDR is unclear.
Purpose of the Study:
- To review the relationship between ufmylation and the DNA damage response (DDR).
- To elucidate the function and mechanism of ufmylation in DDR.
- To explore potential therapeutic strategies based on ufmylation's role in disease pathogenesis.
Main Methods:
- Literature review focusing on ufmylation and DDR pathways.
- Analysis of enzymatic mechanisms involved in ufmylation.
- Integration of knowledge on DSB repair and ubiquitin-like modifications.
Main Results:
- The study reviews the known components and processes of ufmylation.
- It highlights the critical role of DDR in maintaining genome stability and preventing cancer.
- The potential, yet largely unknown, function of ufmylation in DDR is discussed.
Conclusions:
- Ufmylation's precise role in the DNA damage response remains to be fully elucidated.
- Further research into ufmylation in DDR could reveal disease mechanisms.
- This understanding may guide the development of novel therapeutic approaches.
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