Photolyase confers resistance to UV light but does not contribute to the symbiotic benefit of bioluminescence in Vibrio fischeri ES114.
Photolyase confers resistance to UV light but does not contribute to the symbiotic benefit of bioluminescence in Vibrio fischeri ES114.
复制标题
光裂合酶赋予费氏弧菌 ES114 抗紫外线的能力，但对生物发光的共生效益没有贡献。
DOI：
10.1128/aem.01272-06
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发表时间：
2006
影响因子：
4.4
通讯作者：
Stabb,EricV
中科院分区：
文献类型：
--
作者：
Walker,EmmaL;Bose,JeffreyL;Stabb,EricV
Recent reports suggest that the selective advantage of bioluminescence for bacteria is mediated by light-dependent stimulation of photolyase to repair DNA lesions. Despite evidence for this model, photolyase mutants have not been characterized in a naturally bioluminescent bacterium, nor has this hypothesis been tested in bioluminescent bacteria under natural conditions. We have now characterized the photolyase encoded byphrin the bioluminescent bacteriumVibrio fischeriES114. Consistent with Phr possessing photolyase activity,phrconferred light-dependent resistance to UV light. However, upon comparing ES114 to aphrmutant and a dark ΔluxCDABEGmutant, we found that bioluminescence did not detectably affect photolyase-mediated resistance to UV light. Addition of the light-stimulating autoinducerN-3-oxo-hexanoyl homoserine lactone appeared to increase UV resistance, but this was independent of photolyase or bioluminescence. Moreover, although bioluminescence confers an advantage forV. fischeriduring colonization of its natural host,Euprymna scolopes, thephrmutant colonized this host to the same level as the wild type. Taken together, our results indicate that at least inV. fischeristrain ES114, the benefits of bioluminescence during symbiotic colonization are not mediated by photolyase, and although some UV resistance mechanism may be coregulated with bioluminescence, we found no evidence that light production benefits cells by stimulating photolyase in this strain.
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