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Related Concept Videos

DNA Helicases00:55

DNA Helicases

DNA unwinding helicase enzymes are a type of motor protein. Motor proteins can translocate along filaments or polymers using energy generated from ATP hydrolysis. Helicases are involved in all the important cellular processes where DNA unwinding is required, such as DNA replication, repair, recombination, and transcription. They are present in all living organisms, but vary in their structure, function, and mechanism of action. For example, in prokaryotes, DnaB helicase binds and translocates...
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...
Replication in Prokaryotes01:32

Replication in Prokaryotes

DNA replication has three main steps: initiation, elongation, and termination. Replication in prokaryotes begins when initiator proteins bind to the single origin of replication (ori) on the cell's circular chromosome. Replication then proceeds around the entire circle of the chromosome in each direction from the two replication forks, resulting in two DNA molecules.
Many Proteins Work Together to Replicate the Chromosome
Replication is coordinated and carried out by a host of specialized...
Replication in Prokaryotes02:35

Replication in Prokaryotes

Overview
Replication in Prokaryotes02:35

Replication in Prokaryotes

Overview

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Related Experiment Video

Updated: May 16, 2026

Strand-Specific Analysis of Proteins at Replicating DNA Strands by Enrichment and Sequencing of Protein-Associated Nascent DNA Method
08:53

Strand-Specific Analysis of Proteins at Replicating DNA Strands by Enrichment and Sequencing of Protein-Associated Nascent DNA Method

Published on: May 2, 2025

Helicases at the replication fork.

Peter McGlynn1

  • 1Department of Biology, University of York, York, Yorkshire, UK, peter.mcglynn@york.ac.uk.

Advances in Experimental Medicine and Biology
|November 20, 2012
PubMed
Summary
This summary is machine-generated.

Helicases are essential enzymes that unwind DNA for replication and repair. They coordinate DNA synthesis, process fragments, and manage replication fork challenges, ensuring accurate genetic duplication.

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Strand-Specific Analysis of Proteins at Replicating DNA Strands by Enrichment and Sequencing of Protein-Associated Nascent DNA Method
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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • Helicases are crucial for DNA replication, unwinding double-stranded DNA templates.
  • They are involved in various DNA replication steps beyond initial unwinding.

Purpose of the Study:

  • To describe the multifaceted roles of helicases in DNA replication.
  • To explain how helicase function is coordinated with other catalytic processes.

Main Methods:

  • Review of existing literature on helicase function in DNA replication.
  • Analysis of the coordination between DNA unwinding and other enzymatic activities.

Main Results:

  • Helicases regulate DNA synthesis priming and coordinate polymerase activities.
  • Accessory helicases assist in unwinding DNA obstructed by bound proteins.
  • Helicases are vital for Okazaki fragment processing, resolving topological issues, and reloading replication machinery.

Conclusions:

  • Helicases are indispensable for efficient and high-fidelity DNA duplication.
  • Their coordinated action ensures the integrity of the replication process from initiation to termination.