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Mobile-CRISPRi protocol optimization for Vibrionaceae.

Logan J Geyman1, Madeline P Tanner1, Natalia Rosario-Meléndez2,3

  • 1Department of Biology, Indiana University , Bloomington, Indiana, USA.

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|July 5, 2024
PubMed
Summary
This summary is machine-generated.

We optimized Mobile-CRISPRi gene knockdown for multiple Vibrio species. This method uses a deactivated Cas9 protein and guide RNA for inducible gene expression control in bacteria.

Keywords:
CRISPRCRISPRiVibrioVibrio campbelliiVibrio choleraeVibrio fischeriVibrio parahaemolyticusVibrio vulnificusregulation of gene expression

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Bacterial Genetics

Background:

  • Mobile clustered regularly interspaced palindromic repeats interference (Mobile-CRISPRi) is a validated technique for reducing bacterial gene expression.
  • The system relies on a deactivated Cas9 protein and guide RNA, both inducible by isopropyl β-D-1-thiogalactopyranoside.
  • Essential components are integrated into the bacterial chromosome using Tn7 transposition.

Purpose of the Study:

  • To optimize and adapt the Mobile-CRISPRi system for efficient application in various Vibrio species.
  • To enhance the utility of Mobile-CRISPRi for genetic manipulation in medically and environmentally relevant Vibrio bacteria.

Main Methods:

  • Adaptation of existing Mobile-CRISPRi protocols for Vibrio species.
  • Integration of deactivated Cas9, guide RNA, and Tn7 transposition elements into the Vibrio chromosome.
  • Induction of gene knockdown using isopropyl β-D-1-thiogalactopyranoside.

Main Results:

  • Successfully optimized Mobile-CRISPRi for gene knockdown in multiple Vibrio species.
  • Demonstrated the inducible nature of gene silencing mediated by deactivated Cas9 and guide RNA.
  • Confirmed stable integration of the Mobile-CRISPRi system into the Vibrio chromosome via Tn7 transposition.

Conclusions:

  • The optimized Mobile-CRISPRi system provides a robust tool for gene expression knockdown in diverse Vibrio species.
  • This advancement facilitates functional genomic studies and genetic engineering in Vibrio bacteria.
  • The optimized method expands the applicability of CRISPR interference technology in marine bacteria.