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Related Concept Videos

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The CRISPR-Cas system serves as a bacterial defense mechanism against invading genetic elements such as viruses and plasmids, forming the foundation for its adaptation as a powerful genome-editing tool. Originally discovered in prokaryotes, this system has been repurposed to revolutionize genetic engineering across a wide range of organisms, including plants, animals, and humans. The core component, Cas9, is an endonuclease derived from Streptococcus pyogenes, capable of introducing...
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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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Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced...
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A CRISPR/Cas9-mediated in situ complementation method for Phytophthora sojae mutants.

Min Qiu1,2,3, Yaning Li1,2,3, Wenwu Ye1,2,3

  • 1Department of Plant Pathology, Nanjing Agricultural University, Nanjing, China.

Molecular Plant Pathology
|January 23, 2021
PubMed
Summary

Researchers developed an in situ complementation system for Phytophthora sojae using CRISPR/Cas9. This method accurately restores mutated genes, advancing oomycete functional genomics research.

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Phytophthora sojaeCRISPR/Cas9gene complementationgenome editingoomycete

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Area of Science:

  • Oomycete functional genomics
  • Plant pathology
  • Molecular biology

Background:

  • Phytophthora sojae is a key model organism for oomycete research.
  • CRISPR/Cas9 genome editing is widely used in P. sojae.
  • A complete functional gene research system, including complementation, is needed.

Purpose of the Study:

  • To develop an in situ complementation method for P. sojae.
  • To accurately restore gene function after knockout.
  • To accelerate functional genomics research in oomycetes.

Main Methods:

  • CRISPR/Cas9-mediated gene knockout of PsPP2Ab1 in P. sojae.
  • Development and application of an in situ complementation system.
  • Phenotypic analysis of knockout mutants and complemented strains.

Main Results:

  • Deletion of PsPP2Ab1 caused severe defects in hyphal growth, soybean infection, and sporangia production.
  • In situ complementation successfully restored all lost functions.
  • The developed system accurately validates gene function.

Conclusions:

  • An effective in situ complementation system for P. sojae has been established.
  • This system significantly enhances functional genomics studies in oomycetes.
  • The method accelerates the understanding of oomycete gene function in the post-genomic era.