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New science of metagenomics 'will transform modern microbiology'

iology, University of Wisconsin, Madison, and co-chair of the committee that wrote the report. "Shedding light on thousands of new microorganisms will lead to new biological concepts as well as practical applications for human health, agriculture, and environmental stewardship."

Metagenomics studies begin by extracting DNA from all the microbes living in a particular environmental sample; there could be thousands or even millions of organisms in one sample. The extracted genetic material consists of millions of random fragments of DNA that can be cloned into a form capable of being maintained in laboratory bacteria. These bacteria are used to create a "library" that includes the genomes of all the microbes found in a habitat, the natural environment of the organisms. Although the genomes are fragmented, new DNA sequencing technology and more powerful computers are allowing scientists to begin making sense of these metagenomic jigsaw puzzles. They can examine gene sequences from thousands of previously unknown microorganisms, or induce the bacteria to express proteins that are screened for capabilities such as vitamin production or antibiotic resistance.

The Research Council report was requested by several federal agencies interested in the potential of metagenomics and how best to encourage its success. In particular, the committee was asked to recommend promising directions for future studies. It concluded that the most efficient way to boost the field of metagenomics overall would be to establish a Global Metagenomics Initiative that includes a few large-scale, internationally coordinated projects and numerous medium- and small-size studies.

"Because the challenges and opportunities presented by metagenomics are so enormous, a major commitment equivalent to that of the Human Genome Project is both justified and necessary," added committee co-chair James M. Tiedje, University Distinguished Professor of Microbiology and director
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Source:The National Academies


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