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New laboratory test assesses how DNA damage affects protein synthesis
Date:8/21/2012

RIVERSIDE, Calif. Transcription is a cellular process by which genetic information from DNA is copied to messenger RNA for protein production. But anticancer drugs and environmental chemicals can sometimes interrupt this flow of genetic information by causing modifications in DNA.

Chemists at the University of California, Riverside have now developed a test in the lab to examine how such DNA modifications lead to aberrant transcription and ultimately a disruption in protein synthesis.

The chemists report that the method, called "competitive transcription and adduct bypass" or CTAB, can help explain how DNA damage arising from anticancer drugs and environmental chemicals leads to cancer development.

"Aberrant transcription induced by DNA modifications has been proposed as one of the principal inducers of cancer and many other human diseases," said Yinsheng Wang, a professor of chemistry, whose lab led the research. "CTAB can help us quantitatively determine how a DNA modification diminishes the rate and fidelity of transcription in cells. These are useful to know because they affect how accurately protein is synthesized. In other words, CTAB allows us to assess how DNA damage ultimately impedes protein synthesis, how it induces mutant proteins. "

Study results appeared online in Nature Chemical Biology on Aug. 19.

Wang explained that the CTAB method can be used also to examine various proteins involved in the repair of DNA. One of his research group's goals is to understand how DNA damage is repaired knowledge that could result in the development of new and more e
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Contact: Iqbal Pittalwala
iqbal@ucr.edu
951-827-6050
University of California - Riverside
Source:Eurekalert  

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