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Related Concept Videos

Homologous Recombination02:31

Homologous Recombination

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The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
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Viral Recombination00:57

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Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
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Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
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Related Experiment Video

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Preparation of the Mgm101 Recombination Protein by MBP-based Tagging Strategy
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Recombination and replication.

Aisha H Syeda1, Michelle Hawkins1, Peter McGlynn1

  • 1Department of Biology, University of York, Wentworth Way, York YO10 5DD, United Kingdom.

Cold Spring Harbor Perspectives in Biology
|October 25, 2014
PubMed
Summary
This summary is machine-generated.

DNA replication and homologous recombination are fundamentally linked processes. This review explores how recombination enzymes support DNA duplication and maintain genome stability against replication challenges across all life.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Recombination and replication are critical DNA metabolism processes.
  • Decades of research show these processes are inseparable for DNA replication.
  • Homologous recombination is vital for completing DNA replication and vice versa.

Purpose of the Study:

  • To review the roles of recombination enzymes in genome duplication.
  • To examine how recombination aids replication fork progression.
  • To highlight the enzymes that maintain genome stability during replication.

Main Methods:

  • Literature review of established research on DNA replication and recombination.
  • Analysis of conserved mechanisms across different life domains.
  • Focus on the enzymatic functions underpinning DNA metabolism.

Main Results:

  • Recombination enzymes are essential for successful genome duplication.
  • These enzymes help overcome barriers that impede replication forks.
  • Conserved mechanisms highlight the fundamental nature of these DNA processes.

Conclusions:

  • The interplay between recombination and replication is crucial for genome integrity.
  • Recombination machinery actively supports replication fork progression.
  • Understanding these links provides insight into conserved DNA metabolism across life.