Related Experiment Video
Updated: Jun 30, 2026
06:45
Task Interruption and Resumption Paradigm for Testing the Activation and Pursuit of an Abstract Thinking Goal
Published on: April 18, 2017
A sense of the end
1Swiss Institute for Experimental Cancer Research, Chemin des Boveresses 155, CH-1066 Epalinges, Switzerland. sgasser@eliot.unil.ch
Science (New York, N.Y.)
|May 29, 2000
Summary
Cells use DNA repair proteins to maintain telomere length and protect chromosome ends. This suggests a shared mechanism between double-strand break repair and telomere maintenance, possibly involving chromatin regulation.
Area of Science:
- Molecular Biology
- Genetics
- Cell Biology
Background:
- Cell biology traditionally differentiates chromosomal double-strand breaks from natural chromosome ends (telomeres).
- Previous models proposed telomere-specific complexes or overhang annealing for end protection.
- These models did not account for the involvement of DNA repair machinery in telomere maintenance.
Purpose of the Study:
- To investigate the mechanisms by which cells distinguish double-strand breaks from chromosome ends.
- To explore the role of DNA repair complexes in telomere length maintenance.
- To understand the interplay between subtelomeric chromatin and the DNA damage response.
Main Methods:
- The abstract does not specify the methods used.
- Further research would be needed to detail the experimental approaches.
Main Results:
- Nonhomologous end joining complexes are crucial for normal telomere length maintenance.
- Subtelomeric chromatin undergoes changes in response to the DNA damage checkpoint.
- Telomeres and double-strand break repair machinery share essential components.
Conclusions:
- Existing models of chromosome end protection require revision.
- A chromatin assembly checkpoint may integrate telomere maintenance and double-strand break repair pathways.
- Shared components suggest a unified regulatory network for genome stability.
More Related Videos
Related Concept Videos
01:44Termination of Translation
The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the site where the peptide bond is formed - and a large, internal, water-filled tube through which the nascent polypeptide moves. This latter structure is called the Peptide Exit Tunnel, and it begins at the PTC and spans the body of the large ribosomal subunit. During translation, as the nascent polypeptide chain is synthesized, it passes through...
01:30Apoptosis
Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size reduction of the tissue.
01:44Termination of Translation
The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the site where the peptide bond is formed - and a large, internal, water-filled tube through which the nascent polypeptide moves. This latter structure is called the Peptide Exit Tunnel, and it begins at the PTC and spans the body of the large ribosomal subunit. During translation, as the nascent polypeptide chain is synthesized, it passes through...
01:21Kubler Ross's Stages of Dying
Elisabeth Kübler-Ross significantly advanced psychology's understanding of the process of dying with her influential book, On Death and Dying (1969). She focused on studying terminally ill individuals and outlined five stages commonly experienced when coping with death: denial, anger, bargaining, depression, and acceptance.
In denial, individuals reject the reality of their condition, often thinking, "This isn't true; I feel fine," as a way to protect themselves from emotional distress. Anger...
In denial, individuals reject the reality of their condition, often thinking, "This isn't true; I feel fine," as a way to protect themselves from emotional distress. Anger...
01:19Counterfactual Thinking
Counterfactual thinking is a cognitive process wherein individuals mentally reconstruct alternative versions of past events, often beginning with “what if” or “if only.” This reflective mechanism plays a significant role in shaping emotional experiences and guiding future behavior. Though typically triggered by unfavorable or unexpected outcomes, counterfactual thinking can also emerge in mundane, everyday decisions and experiences, revealing its deep entrenchment in human cognition.Types of...
01:28Ending Relationships
The dissolution of intimate relationships presents complex emotional and psychological challenges, particularly when emotional bonds are strong, the relationship is long-standing, and perceived alternatives are limited. This distress often intensifies in romantic breakups, where the initiator may experience greater turmoil than the rejected partner. Contributing factors include residual attachment, guilt over causing pain, and uncertainty about how to manage the situation. The stress is further...