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Stowers researchers develop whole genome sequencing approach for mutation discovery
Date:5/5/2009

The Stowers Institute's Hawley Lab and Molecular Biology Facility have developed a "whole-genome sequencing approach" to mapping mutations in fruit flies. The novel methodology promises to reduce the time and effort required to identify mutations of biological interest. The work was published in the May issue of the journal GENETICS.

The team mapped a fruit-fly mutation caused by the compound ethyl methanesulfonate (EMS) by determining the DNA sequence of the mutant fly's genome. The results provide insight into the mechanism of EMS mutageneseis and into gene conversion events involving balancer chromosomes genetic tools used to prevent genetic recombination between homologous chromosomes during meiosis.

Model organisms like fruit flies are used in research for studying both normal biological processes and human disease. Fruit fly genes can be inserted, deleted or modified, and large numbers of flies can be randomly mutated to generate interesting phenotypes relevant to human disease. Finding the mutated gene responsible for an interesting phenotype is labor intensive and time consuming, and many mutations that cause medically relevant phenotypes are not discovered. The new approach lowers the barrier to finding mutations and greatly accelerates the discovery of genes important for human health.

"This approach will change the way fruit fly genetics is done," said Scott Hawley, Ph.D., Investigator and co-equal senior author on the publication. "Traditional mapping approaches to identify mutations are inefficient procedures. Our whole-genome sequencing approach is fast and cost effective. Among other potential uses, it also carries the potential to pinpoint inheritable molecular characteristics that are controlled by several genes at once."

"The traditional mapping method could take months to years depending on the complexity of the phenotype," said Karen Staehling-Hampton, Ph.D., Managing Director of Molecular
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Contact: Marie Jennings
mfj@stowers.org
816-926-4015
Stowers Institute for Medical Research
Source:Eurekalert

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