1. Photoreactivation of (6-4) photolyase in Dunaliella salina
- Author
-
Xue, Yan Lv, Dai, Rong Qiao, Yan, Xiong, Hui, Xu, Fang Fang, You, Yu, Cao, Xuan, He, and Yi, Cao
- Subjects
Electron Transport ,Salinity ,DNA Repair ,Chlorophyta ,Pyrimidine Dimers ,Ultraviolet Rays ,Hydrogen-Ion Concentration ,Deoxyribodipyrimidine Photo-Lyase ,Photobiology - Abstract
Dunaliella salina is a unicellular green alga and possesses two types of photolyase: Class II cyclobutane pyrimidine dimers (CPD) photolyase and (6-4) photolyase. The gene of D. salina (6-4) photolyase is the first one found in unicellular organisms. CPD photolyases have been extensively studied but (6-4) photolyases are less understood. Because of the data observed in this study, D. salina (6-4) photolyase is insensitive to high salinity; whether it can tolerate a higher level of salinity than other (6-4) photolyases needs to be studied further. However, evidence is provided that (6-4) photolyases might be highly conserved among different species, not only in the sequence identity but also in the photorepair mechanism.
- Published
- 2008