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Applied and Environmental Microbiology, January 2008, p. 327-328, Vol. 74, No. 1
0099-2240/08/$08.00+0     doi:10.1128/AEM.00013-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

Effects of UV Radiation on Photolyase and Implications with Regards to Photoreactivation following Low- and Medium-Pressure UV Disinfection{triangledown}

Jiangyong Hu* and Puay Hoon Quek

Centre for Water Research, Division of Environmental Science and Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260

Received 3 January 2007/ Accepted 24 October 2007

Photolyase activity following exposure to low-pressure (LP) and medium-pressure (MP) UV lamps was evaluated. MP UV irradiation resulted in a greater reduction in photolyase activity than LP UV radiation. The results suggest that oxidation of the flavin adenine dinucleotide in photolyase may have caused the decrease in activity.

* Corresponding author. Mailing address: Division of Environmental Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, EA 07-23, Singapore 117576. Phone: (65)-65164540. Fax: (65)-67744202. E-mail: esehujy{at}nus.edu.sg

{triangledown} Published ahead of print on 2 November 2007.

Applied and Environmental Microbiology, January 2008, p. 327-328, Vol. 74, No. 1
0099-2240/08/$08.00+0     doi:10.1128/AEM.00013-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.





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