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KMID : 0880220170550070499
Journal of Microbiology
2017 Volume.55 No. 7 p.499 ~ p.507
Microbial radiation-resistance mechanisms
Jung Kwang-Woo

Lim Sang-Yong
Bahn Yong-Sun
Abstract
Organisms living in extreme environments have evolved a wide range of survival strategies by changing biochemical and physiological features depending on their biological niches. Interestingly, organisms exhibiting high radiation resistance have been discovered in the three domains of life (Bacteria, Archaea, and Eukarya), even though a naturally radiationintensive environment has not been found. To counteract the deleterious effects caused by radiation exposure, radiation- resistant organisms employ a series of defensive systems, such as changes in intracellular cation concentration, excellent DNA repair systems, and efficient enzymatic and non-enzymatic antioxidant systems. Here, we overview past and recent findings about radiation-resistance mechanisms in the three domains of life for potential usage of such radiationresistant microbes in the biotechnology industry.
KEYWORD
radiation, DNA damage, reactive oxygen species, antioxidant mechanism, microorganism
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