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NYU Langone researchers reveal a new mechanism of genomic instability
Date:8/18/2011

p>Researchers demonstrated that the cooperation between translating ribosomes and RNA polymerase is central in the maintenance of genomic stability because it prevents backtracking.

The implication of these findings is significant as the ribosome is the primary sensor of cellular metabolism and stress. It has been well established that stress-induced mutagenesis is activated in response to adverse conditions, such as starvation or antibiotics. The development of mutations depends on error-prone DSB repair, which accelerates adaptation to environmental changes, such as acquisition of resistance to antibiotics. In this respect, the backtracking-based mechanism of DSB may account for stress-driven evolution in bacteria.

"Because the organization of replisomes and RNA polymerase is preserved in evolution, the phenomena of backtracking-driven genome instability for E.coli could occur in other organisms as well. It may potentially explain, for example, some cases of chromosomal fragility associated with certain human diseases" said Dr. Nudler.


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Contact: Christopher Rucas
christopher.rucas@nyumc.org
212-404-3525
NYU Langone Medical Center / New York University School of Medicine
Source:Eurekalert

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