Related Experiment Video

Updated: Mar 9, 2026

Study of the DNA Damage Checkpoint using Xenopus Egg Extracts
10:55

Study of the DNA Damage Checkpoint using Xenopus Egg Extracts

Published on: November 5, 2012

17.2K

DNA Replication Checkpoint: New ATR Activator Identified

Lee Zou1

  • 1MGH Cancer Center & Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.

Current Biology : CB
|January 11, 2017
PubMed

Insights

The protein ETAA1 activates the ATR kinase, a key player in DNA replication stress responses. These findings reveal how the ATR pathway is regulated during cellular stress.

Area of Science:

  • Cellular Biology
  • Molecular Biology
  • Genetics

Background:

  • The ATR kinase pathway is crucial for maintaining genomic stability by responding to DNA replication stress.
  • Understanding the upstream activators of ATR is essential for comprehending cellular responses to DNA damage.

Purpose of the Study:

  • To identify and characterize novel activators of the ATR kinase pathway.
  • To elucidate the role of ETAA1 in the human cellular response to replication stress.

Main Methods:

  • Investigated the interaction between ETAA1 and ATR in human cell lines.
  • Utilized biochemical assays and genetic approaches to assess ETAA1's function in ATR activation.

Main Results:

  • Demonstrated that ETAA1 is a significant activator of ATR kinase in human cells.
  • Showcased ETAA1's role in the signaling cascade initiated by replication stress.

Conclusions:

  • ETAA1 is a critical component of the ATR pathway, functioning as an upstream activator.
  • These findings provide new insights into the mechanisms governing replication stress responses and ATR pathway regulation.

More Related Videos

Visualization of DNA Replication in the Vertebrate Model System DT40 using the DNA Fiber Technique07:18

Visualization of DNA Replication in the Vertebrate Model System DT40 using the DNA Fiber Technique

Published on: October 27, 2011

40.7K
Visualization of Replisome Encounters with an Antigen Tagged Blocking Lesion08:24

Visualization of Replisome Encounters with an Antigen Tagged Blocking Lesion

Published on: July 27, 2021

1.7K

Related Concept Videos

DNA Damage can Stall the Cell Cycle02:36

DNA Damage can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
10.3K
DNA Damage Can Stall the Cell Cycle02:36

DNA Damage Can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
3.3K
Restarting Stalled Replication Forks02:37

Restarting Stalled Replication Forks

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,...
6.5K
S-Cdk Initiates DNA Replication02:38

S-Cdk Initiates DNA Replication

The cell cycle is a series of events leading to DNA duplication followed by the division of cell content to form two daughter cells. The cell cycle progresses in four stages—the cell increases in size (gap 1 or G1-phase), duplicates its DNA (synthesis or S-phase), prepares to divide (gap 2 or G2-phase), and divides (mitosis or M-phase).
Two states at the origin of replication
In eukaryotes, the initiation of replication occurs at many sites on the chromosomes, called the origins of...
5.8K
The DNA Replication Fork01:02

The DNA Replication Fork

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...
42.1K
The DNA Replication Fork01:02

The DNA Replication Fork

19.0K