Journal
NATURE PROTOCOLS
Volume 9, Issue 10, Pages 2301-2316Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nprot.2014.082
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Funding
- US Department of Energy [DE-FG02-02ER63445]
- Defense Advanced Research Projects Agency [N66001-12-C-4020, N66001-12-C-4211]
- Arnold and Mabel Beckman Foundation
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Multiplex automated genome engineering (MAGE) is a powerful technology for in vivo genome editing that uses synthetic single-stranded DNA (ssDNA) to introduce targeted modifications directly into the Escherichia coli chromosome. MAGE is a cyclical process that involves transformation of ssDNA (by electroporation) followed by outgrowth, during which bacteriophage homologous recombination proteins mediate annealing of ssDNAs to their genomic targets. By iteratively introducing libraries of mutagenic ssDNAs targeting multiple sites, MAGE can generate combinatorial genetic diversity in a cell population. Alternatively, MAGE can introduce precise mutant alleles at many loci for genome-wide editing or for recoding projects that are not possible with other methods. In recent technological advances, MAGE has been improved by strain modifications and selection techniques that enhance allelic replacement. This protocol describes the manual execution of MAGE wherein each cycle takes similar to 2.5 h, which, if carried out by two people, allows similar to 10 continuous cycles of MAGE-based mutagenesis per day.
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