Mutation have made DNA repair more efficient
- In a study published describe blasting E. coli bacteria with ionizing radiation one per week, caused the bacteria to become radiation resistant. In doing so, they have became genetic mutations and mechanisms underlying this resistance.
with time , as the bacteria have become resistant, the researchers have been able to elevate the level of radiation to which they exposed the bacteria. The study took a deep dive into the mutations they have collected after 50 cycles (meaning the bacteria were irradiated 50 times).While the total mechanisms, such as increased DNA repair, are the same as in naturally resistant bacteria, many of the mutations that caused those changes have never been seen before. Bruckbauer added that beyond DNA repair and changes to RNA polymerase, there are whole new ways of being resistant that could arise.
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