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Researchers advance toward engineering 'wildly new genome'
Date:10/19/2013

ore, incorporating rare, non-standard amino acids could ensure strains only survive in a laboratory environment.

Engineering and evolution

Since a single genetic flaw can spell death for an organism, the challenge of managing a series of hundreds of specific changes was daunting, the researchers said. In both projects, the researchers paid particular attention to developing a methodical approach to planning and implementing changes and troubleshooting the results.

"We wanted to develop the ability to efficiently build the desired genome and to very quickly identify any problemsfrom design flaws or from undesired mutations and develop workarounds," Lajoie said.

The team relied on number oftechnologies developed in the Church lab and the Wyss Institute and with partners in academia and industry, including next-generation sequencing tools, DNA synthesis on a chip, and MAGE and CAGE genome editing tools. But one of the most important tools they used was the power of natural selection, the researchers added.

"When an engineering team designs a new cellphone, it's a huge investment of time and money. They really want that cell phone to work," Church said. "With E. coli we can make a few billion prototypes with many different genomes, and let the best strain win. That's the awesome power of evolution."


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Contact: David Cameron
david_cameron@hms.harvard.edu
617-432-0441
Harvard Medical School
Source:Eurekalert

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