Related Experiment Video
Updated: Jan 23, 2026
10:32
Detection of Post-Replicative Gaps Accumulation and Repair in Human Cells Using the DNA Fiber Assay
Published on: February 3, 2022
7.8K
XLF extends its range from DNA repair to replication.
Yanira Gonzalez-Rodriguez1, Samuel F Bunting2
1Department of Molecular Biology and Biochemistry, Rutgers, The State University of New Jersey, Piscataway, NJ.
The Journal of Cell Biology
|June 14, 2019
Summary
The non-homologous end-joining factor XLF stabilizes replication forks, revealing a crucial link between DNA replication and repair processes. This finding enhances our understanding of genome stability mechanisms.
Area of Science:
- Molecular Biology
- Genetics
- Cell Biology
Background:
- DNA replication and repair are critical for maintaining genome integrity.
- The non-homologous end-joining (NHEJ) pathway is a major DNA double-strand break repair mechanism.
- Replication fork stability is essential to prevent genomic instability.
Purpose of the Study:
- To investigate the role of the NHEJ factor XLF in DNA replication.
- To elucidate the interplay between DNA repair factors and replication fork dynamics.
Main Methods:
- The study utilized techniques to assess replication fork stability in the presence and absence of XLF.
- Experimental approaches likely involved cell-based assays and molecular biology techniques.
Main Results:
- XLF was found to promote the stability of replication forks.
- This suggests a novel function for an NHEJ factor beyond double-strand break repair.
Conclusions:
- XLF plays a significant role in maintaining replication fork integrity.
- The findings highlight a direct connection between DNA repair machinery and the replication process, impacting overall genome stability.
Related Concept Videos
02:25Overview of DNA Repair
33.5K
In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
Chemically...
Chemically...
33.5K
02:25Overview of DNA Repair
9.7K
9.7K
02:40DNA Replication
58.9K
DNA replication involves the separation of the two strands of the double helix, with each strand serving as a template from which the new complementary strand is copied. After replication, each double-stranded DNA includes one parental or “old” strand and one “new” strand. This is known as semiconservative replication. The resulting DNA molecules have the same sequence and are divided equally into the two daughter cells.
Replication in Prokaryotes
DNA replication...
Replication in Prokaryotes
DNA replication...
58.9K
01:02The DNA Replication Fork
40.6K
An organism’s genome needs to be duplicated in an efficient and error-free manner for its growth and survival. The replication fork is a Y-shaped active region where two strands of DNA are separated and replicated continuously. The coupling of DNA unzipping and complementary strand synthesis is a characteristic feature of a replication fork. Organisms with small circular DNA, such as E. coli, often have a single origin of replication; therefore, they have only two replication...
40.6K
01:02The DNA Replication Fork
18.3K
18.3K
02:37Restarting Stalled Replication Forks
6.3K
DNA replication is initiated at sites containing predefined DNA sequences known as origins of replication. DNA is unwound at these sites by the minichromosome maintenance (MCM) helicase and other factors such as Cdc45 and the associated GINS complex.The unwound single strands are protected by replication protein A (RPA) until DNA polymerase starts synthesizing DNA at the 5’ end of the strand in the same direction as the replication fork. To prevent the replication fork from falling apart,...
6.3K