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Multiple genes deletion based on Cre-loxP marker-less gene deletion system for the strains from the genus of Pectobacterium
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Multiple genes deletion based on Cre-loxP marker-less gene deletion system for the strains from the genus of Pectobacterium
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Multiple genes deletion based on Cre-loxP marker-less gene deletion system for the strains from the genus of Pectobacterium
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Journal Article
Multiple genes deletion based on Cre-loxP marker-less gene deletion system for the strains from the genus of Pectobacterium
2024
Overview
ObjectiveTo introduce the Cre-loxP system for constructing marker-less multiple-gene deletion mutants in Pectobacterium, overcoming limitations of antibiotic markers and enhancing the understanding of pathogenic mechanisms.Results Firstly, a plasmid named pEX18-Cre, containing a sacB sucrose suicide gene, was constructed to express Cre recombinase in Pectobacterium. Secondly, a mutant in which the loxP-Km fragment replaced the target gene was obtained through homologous recombination double-crossover with the chromosome. Finally, pEX18-Cre was introduced into the mutant to excise the DNA between the loxP sites, thereby removing the markers and achieving multiple gene deletions. By utilizing the Cre-loxP system, we successfully constructed multiple marker-less gene deletion mutants in Pectobacterium strains.Conclusions The Cre-loxP system efficiently creates marker-less multiple-gene deletion mutants, enhancing the study of Pectobacterium pathogenic mechanisms by overcoming antibiotic marker limitations.
