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Related Concept Videos

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 forks, one in...
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 forks, one in...
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...
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...
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 replication.
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 replication.

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Related Experiment Video

Updated: Jun 8, 2026

Quantifying Replication Stress in Ovarian Cancer Cells Using Single-Stranded DNA Immunofluorescence
06:25

Quantifying Replication Stress in Ovarian Cancer Cells Using Single-Stranded DNA Immunofluorescence

Published on: February 10, 2023

DNA replication fidelity and cancer.

Bradley D Preston1, Tina M Albertson, Alan J Herr

  • 1Department of Pathology, University of Washington, Seattle, WA 98195, USA. bradp@u.washington.edu

Seminars in Cancer Biology
|October 19, 2010
PubMed
Summary

Cancer arises from mutations, with DNA replication errors potentially driving its development. Understanding DNA replication fidelity is key to understanding carcinogenesis and developing new cancer therapies.

Area of Science:

  • Genetics
  • Molecular Biology
  • Cancer Research

Background:

  • Cancer is fundamentally a disease of genetic instability, driven by mutations and evolutionary selection.
  • Normal cells possess highly accurate DNA replication mechanisms to prevent harmful mutations.
  • Replication errors are increasingly recognized as significant contributors to cancer development.

Purpose of the Study:

  • To review the molecular pathways responsible for maintaining DNA replication fidelity.
  • To explore the link between errors in DNA replication and the initiation and progression of cancer (carcinogenesis).

Main Methods:

  • Literature review of studies on DNA replication fidelity pathways.
  • Analysis of evidence connecting replication errors to cancer development.

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

Published on: October 27, 2011

Detection of Post-Replicative Gaps Accumulation and Repair in Human Cells Using the DNA Fiber Assay
10:32

Detection of Post-Replicative Gaps Accumulation and Repair in Human Cells Using the DNA Fiber Assay

Published on: February 3, 2022

Related Experiment Videos

Last Updated: Jun 8, 2026

Quantifying Replication Stress in Ovarian Cancer Cells Using Single-Stranded DNA Immunofluorescence
06:25

Quantifying Replication Stress in Ovarian Cancer Cells Using Single-Stranded DNA Immunofluorescence

Published on: February 10, 2023

Visualization of DNA Replication in the Vertebrate Model System DT40 using the DNA Fiber Technique
07:18

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

Published on: October 27, 2011

Detection of Post-Replicative Gaps Accumulation and Repair in Human Cells Using the DNA Fiber Assay
10:32

Detection of Post-Replicative Gaps Accumulation and Repair in Human Cells Using the DNA Fiber Assay

Published on: February 3, 2022

  • Discussion of point mutation instability (PIN) as a factor in carcinogenesis.

    • Main Results:

    • Detailed overview of the complex molecular machinery ensuring DNA replication accuracy.
    • Compilation of evidence suggesting that failures in these pathways lead to increased mutation rates.
    • Identification of point mutation instability (PIN) as a critical mechanism in cancer initiation.

    Conclusions:

    • Maintaining high DNA replication fidelity is crucial for preventing cancer.
    • Replication errors, specifically point mutation instability, are implicated as a significant driver of carcinogenesis.
    • Further research into replication fidelity pathways may offer novel therapeutic targets for cancer prevention and treatment.