| Literature DB >> 21112308 |
Yusuke Nakasone1, Kazunori Zikihara, Satoru Tokutomi, Masahide Terazima.
Abstract
The photochemical reaction dynamics of a light-oxygen-voltage (LOV) domain from the blue light sensor protein, FKF1 (flavin-binding Kelch repeat F-box) was studied by means of the pulsed laser-induced transient grating method. The observed absorption spectral changes upon photoexcitation were similar to the spectral changes observed for typical LOV domain proteins (e.g., phototropins). The adduct formation took place with a time constant of 6 μs. After this reaction, a significant conformational change with a time constant of 6 ms was observed as a change in the diffusion coefficient. An FKF1-LOV mutant without the conserved loop connecting helices E and F, which is present only in the FKF1/LOV Kelch protein 2/ZEITLUPE family, did not show these slow phase dynamics. This result indicates that the conformational change in the loop region represents a major change in the FKF1-LOV photoreaction.Entities:
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Year: 2010 PMID： 21112308 PMCID： PMC2998605 DOI： 10.1016/j.bpj.2010.10.005
Source DB: PubMed Journal: Biophys J ISSN： 0006-3495 Impact factor: 4.033