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Generating PARP Knockout D. melanogaster with CRISPR/Cas9 System.

Yaroslava Karpova1,2, Alexei V Tulin3

  • 1Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, USA. iaroslava.karpova@und.edu.

Methods in Molecular Biology (Clifton, N.J.)
|December 14, 2022
PubMed
Summary

Researchers generated poly(ADP-ribose) (pADPr) mutated Drosophila melanogaster using CRISPR/Cas9. This efficient method overcomes challenges in studying pADPr roles in chromatin remodeling and provides a valuable tool for genetic research.

Keywords:
CRISPR/Cas9DrosophilaPARPknockoutpoly(ADP-ribosyl)ation

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Area of Science:

  • Genetics
  • Molecular Biology
  • Biochemistry

Background:

  • Poly(ADP-ribose) (pADPr) is a crucial post-translational modification involved in chromatin remodeling.
  • Drosophila melanogaster is an ideal model organism for studying pADPr due to its single PARP gene.
  • Generating PARP knockout flies has been challenging due to the gene's location in heterochromatin.

Purpose of the Study:

  • To develop and describe a method for generating PARP-mutated Drosophila melanogaster using the CRISPR/Cas9 system.
  • To overcome previous limitations in creating total knockout PARP flies.
  • To provide a versatile platform for studying pADPr-regulated processes.

Main Methods:

  • CRISPR/Cas9 gene editing was employed for targeted mutagenesis.
  • gRNA design and plasmid cloning were optimized for high efficiency.
  • Fly crosses and mutation detection methods were established for generating mutant stocks.

Main Results:

  • The CRISPR/Cas9 system successfully generated PARP-mutated Drosophila melanogaster.
  • High-efficiency gRNAs targeting the PARP gene region were identified.
  • Over 90% of generated stocks carried PARP mutations.

Conclusions:

  • The described CRISPR/Cas9 method is effective for generating PARP mutations in Drosophila.
  • This approach facilitates the study of poly(ADP-ribosyl)ation in vivo.
  • The methodology can be adapted for other gene targets, knock-ins, and related enzymes.