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Related Concept Videos

The DNA Replication Fork01:02

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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...
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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,...
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Chromosome Replication02:31

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Before a cell can divide, it must accurately replicate all of its chromosomes, including the DNA and its associated histone and non-histone proteins.  This process begins at numerous origins of replication during the S phase of the cell cycle in each of a cell’s chromosomes simultaneously. Certain nucleotides can act as origins of replication, but these sequences are not well defined - especially in complex, multi-cellular, eukaryotic species. The length of DNA that spans an origin...
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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...
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Examination of Proteins Bound to Nascent DNA in Mammalian Cells Using BrdU-ChIP-Slot-Western Technique
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Histone dynamics during DNA replication stress.

Chia-Ling Hsu1, Shin Yen Chong1, Chia-Yeh Lin1

  • 1Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, 11529, Taiwan.

Journal of Biomedical Science
|June 19, 2021
PubMed
Summary
This summary is machine-generated.

Cellular genome replication is vital for stability and survival. Understanding how cells manage replication stress, particularly histone dynamics, is key to preventing genome instability and diseases like cancer.

Keywords:
Genome instabilityHistone dynamicsHistone modificationsHistone variantsReplication stress

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Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • Accurate genome replication is crucial for cell viability and genome stability.
  • Cells are constantly exposed to DNA damage and replication impediments, leading to replication stress.
  • Replication stress responses are increasingly linked to genome instability and diseases, including cancer.

Purpose of the Study:

  • To summarize the current understanding of histone dynamics during replication stress.
  • To highlight recent advances in fork-protective mechanisms against replication stress.

Main Methods:

  • Literature review of studies on DNA replication, replication stress, and chromatin dynamics.
  • Analysis of research on histone modifications and their role in modulating replication fork progression.
  • Synthesis of findings on cellular responses to replication stress.

Main Results:

  • Histone dynamics are critical in managing replication fork progression and cellular responses to replication stress.
  • Recent research has elucidated specific fork-protective mechanisms involving histones.
  • Defects in these processes contribute to genome instability and disease.

Conclusions:

  • Histone dynamics are integral to maintaining genome integrity under replication stress.
  • Further research into histone-mediated protection mechanisms can offer insights into disease prevention and treatment.
  • Understanding replication stress responses is vital for cell viability and preventing diseases like cancer.