In this issue of Cell Reports Methods, Rachwalski et al. describe a high-throughput method to screen genetic interactions in bacteria using a conjugative CRISPR interference (CRISPRi) plasmid. The method enables systematic studies of gene essentiality in diverse genomic and environmental contexts and is applicable to Escherichia coli as well as other bacteria.
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http://dx.doi.org/10.1016/j.crmeth.2024.100697 | DOI Listing |
Appl Environ Microbiol
October 2024
DOE Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, USA.
Alphaproteobacteria have a variety of cellular and metabolic features that provide important insights into biological systems and enable biotechnologies. For example, some species are capable of converting plant biomass into valuable biofuels and bioproducts that have the potential to contribute to the sustainable bioeconomy. Among the Alphaproteobacteria, , , and show promise as organisms that can be engineered to convert extracted plant lignin or sugars into bioproducts and biofuels.
View Article and Find Full Text PDFMicrobiol Resour Announc
August 2024
Department of Biology, Indiana University, Bloomington, Indiana, USA.
Mobile clustered regularly interspaced palindromic repeats interference (Mobile-CRISPRi) is an established method for bacterial gene expression knockdown. The deactivated Cas9 protein and guide RNA are isopropyl β-D-1-thiogalactopyranoside inducible, and all components are integrated into the chromosome via Tn transposition. Here, we optimized methods specific for applying Mobile-CRISPRi in multiple species.
View Article and Find Full Text PDFMicrobiol Mol Biol Rev
June 2024
Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin, USA.
SUMMARYFunctional genomics is the use of systematic gene perturbation approaches to determine the contributions of genes under conditions of interest. Although functional genomic strategies have been used in bacteria for decades, recent studies have taken advantage of CRISPR (clustered regularly interspaced short palindromic repeats) technologies, such as CRISPRi (CRISPR interference), that are capable of precisely modulating expression of all genes in the genome. Here, we discuss and review the use of CRISPRi and related technologies for bacterial functional genomics.
View Article and Find Full Text PDFAppl Environ Microbiol
June 2024
Department of Biology, Indiana University, Bloomington, Indiana, USA.
CRISPRi (Clustered Regularly Interspaced Palindromic Repeats interference) is a gene knockdown method that uses a deactivated Cas9 protein (dCas9) that binds a specific gene target locus dictated by an encoded guide RNA (sgRNA) to block transcription. Mobile-CRISPRi is a suite of modular vectors that enable CRISPRi knockdowns in diverse bacteria by integrating IPTG-inducible and genes into the genome using Tn transposition. Here, we show that the Mobile-CRISPRi system functions robustly and specifically in multiple species: , , , , and .
View Article and Find Full Text PDFCRISPRi (Clustered Regularly Interspaced Palindromic Repeats interference) is a gene knockdown method that uses a deactivated Cas9 protein (dCas9) that binds a specific gene target locus dictated by an encoded guide RNA (sgRNA) to block transcription. Mobile-CRISPRi is a suite of modular vectors that enable CRISPRi knockdowns in diverse bacteria by integrating IPTG-inducible and genes into the genome using Tn transposition. Here, we show that the Mobile-CRISPRi system functions robustly and specifically in multiple species: , and .
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