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New insights into the ability of DNA to overcome harmful genetic changes have been discovered by scientists at the Wellcome Sanger Institute, the University of Lausanne and their collaborators. The team found that 26 per cent of harmful mutations were suppressed by naturally occurring variants in at least one wild yeast strain. In each instance examined in detail, a single rescue mutation was responsible for cancelling out another mutation that would have threatened the organism s survival.
The study, published today (27 May 2021) in
Molecular Systems Biology, provides important information about how DNA variants can suppress undesirable genetic changes. If confirmed in humans, this biological phenomenon could have an important role in genetic diseases such as cancer or rare developmental disorders, and explain why certain patients suffer from more severe disease than others.