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Venter Institute Scientists Create First Synthetic Bacterial Genome
Date:1/24/2008

Publication Represents Largest Chemically Defined Structure Synthesized in the Lab

Team Completes Second Step in Three Step Process to Create Synthetic Organism

ROCKVILLE, Md., Jan. 24 /PRNewswire-USNewswire/ -- A team of 17 researchers at the J. Craig Venter Institute (JCVI) has created the largest man-made DNA structure by synthesizing and assembling the 582,970 base pair genome of a bacterium, Mycoplasma genitalium JCVI-1.0. This work, published online today in the journal Science by Dan Gibson, Ph.D., et al, is the second of three key steps toward the team's goal of creating a fully synthetic organism. In the next step, which is ongoing at the JCVI, the team will attempt to create a living bacterial cell based entirely on the synthetically made genome.

The team achieved this technical feat by chemically making DNA fragments in the lab and developing new methods for the assembly and reproduction of the DNA segments. After several years of work perfecting chemical assembly, the team found they could use homologous recombination (a process that cells use to repair damage to their chromosomes) in the yeast Saccharomyces cerevisiae to rapidly build the entire bacterial chromosome from large subassemblies.

"This extraordinary accomplishment is a technological marvel that was only made possible because of the unique and accomplished JCVI team," said J. Craig Venter, Ph.D., President and Founder of JCVI. "Ham Smith, Clyde Hutchison, Dan Gibson, Gwyn Benders, and the others on this team dedicated the last several years to designing and perfecting new methods and techniques that we believe will become widely used to advance the field of synthetic genomics."

The building blocks of DNA--adenine (A), guanine (G), cytosine (C) and thiamine (T) are not easy chemicals to artificially synthesize into chromosomes. As the strands of DNA get longer they get increasingly brittle, making them more difficult to work with. Prior to to
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SOURCE J. Craig Venter Institute
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