Related Experiment Video
Updated: Jul 17, 2026

Genetic Modification and Recombination of Salivary Gland Organ Cultures
Published on: January 28, 2013
Strand-specific postreplicative processing of mammalian telomeres.
S M Bailey1, M N Cornforth, A Kurimasa
1Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM 87544, USA.
Telomeres protect chromosome ends. Telomeric repeat binding factor 2 (TRF2) and DNA-dependent protein kinase (DNA-PK) are crucial for telomere function, with TRF2-mediated end-capping occurring post-replication on leading-strand synthesized telomeres.
Area of Science:
- Molecular Biology
- Genetics
- Cell Biology
Background:
- Telomeres are essential nucleoprotein structures protecting eukaryotic chromosome ends.
- TRF2 and DNA-PK are vital for maintaining telomere integrity, preventing chromosomal fusion.
- Loss of TRF2 or DNA-PK activity leads to end-to-end chromosomal fusions.
Purpose of the Study:
- To investigate the role of TRF2 and DNA-PK in post-replicative telomere processing.
- To determine if the requirement for TRF2 and DNA-PK is dependent on the mode of DNA replication.
Main Methods:
- Investigated TRF2 and DNA-PK activity in mammalian cells.
- Analyzed telomere replication and processing in relation to DNA synthesis strands.
Main Results:
- TRF2-mediated telomere end-capping occurs after DNA replication.
- The postreplicative function of TRF2 and DNA-PKcs is specific to telomeres synthesized by the leading strand.
- A differential postreplicative processing of telomeres based on replication mode was identified.
Conclusions:
- Telomere replication mode dictates postreplicative processing.
- TRF2 and DNA-PK play distinct roles in capping leading-strand synthesized telomeres.
- This highlights a novel mechanism in maintaining genome stability.
More Related Videos
09:59Transfer of Mammary Gland-forming Ability Between Mammary Basal Epithelial Cells and Mammary Luminal Cells via Extracellular Vesicles/Exosomes
Published on: June 3, 2017
07:34Quantification of Circulating Pig-Specific DNA in the Blood of a Xenotransplantation Model
Published on: September 22, 2020
Related Concept Videos
Transgenic Organisms
Reproductive Cloning
Somatic Cell Nuclear Transfer
In SCNT, an egg cell is taken from an animal and its nucleus is removed, creating an enucleated egg. Then a somatic cell—any cell that is not a sex...
Reproductive Cloning
Somatic Cell Nuclear Transfer
In SCNT, an egg cell is taken from an animal and its nucleus is removed, creating an enucleated egg. Then a somatic cell—any cell that is not a sex...
Cloning of Dolly the Sheep