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Subcloning Plus Insertion (SPI) - A Novel Recombineering Method for the Rapid Construction of Gene Targeting Vectors
Published on: January 8, 2015
Substrate and target sequence length influence RecTE(Psy) recombineering efficiency in Pseudomonas syringae
Zhongmeng Bao1, Sam Cartinhour, Bryan Swingle
1Department of Plant Pathology and Plant-Microbe Biology, Cornell University, Ithaca, New York, United States of America.
Plos One
|December 11, 2012
Summary
We developed a new recombineering system for Pseudomonas syringae genome engineering. Optimizing DNA substrate length and homology arms significantly improves recombination efficiency for this plant pathogen model.
Area of Science:
- Microbiology
- Molecular Biology
- Genetics
Background:
- Pseudomonas syringae is a significant plant pathogen and a model organism for studying bacterial-plant interactions.
- Recombineering offers a powerful tool for genetic manipulation in bacteria.
- Previous work identified functional recombineering genes (bet/exo and recET) in P. syringae.
Purpose of the Study:
- To investigate how double-stranded DNA (dsDNA) substrate properties influence recombineering efficiency in P. syringae.
- To optimize the design of dsDNA substrates for enhanced genetic manipulation in P. syringae.
Main Methods:
- Utilized a recombineering system based on P. syringae orthologs of lambda Red bet/exo and Rac recET genes.
- Tested various lengths of flanking homologies and inserted/deleted sequences in dsDNA substrates.
- Quantified recombination efficiency mediated by the RecTE(Psy) system.
Main Results:
- The length of flanking homologies critically impacts RecTE(Psy) recombination efficiency.
- The length of the sequence being inserted or deleted also significantly affects recombination outcomes.
- Specific dsDNA substrate designs lead to markedly different recombineering efficiencies.
Conclusions:
- Understanding the influence of dsDNA substrate length is crucial for effective recombineering in P. syringae.
- These findings provide essential design guidelines for researchers using recombineering for P. syringae genome manipulation.
- The developed system and optimized parameters enhance the utility of recombineering for studying this important plant pathogen.
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