Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
2048247 | FEBS Letters | 2011 | 5 Pages |
Abstract
TePixD, a cyanobacterial sensor of blue light using flavin adenine dinucleotide (FAD) (BLUF) which exists in a decamer form, was found to exhibit photoreaction sensitive to light intensity. While the number of excited molecules increased monotonically as the laser power increased, the number of decamers exhibiting a global conformational change initially increased, and then decreased with the increase of excitation intensity. This unusual power dependence was analyzed based on a Poisson distribution equation, demonstrating that decamers containing more than one excited monomer subunit do not undergo conformational change. Our results suggest that TePixD functions not only as a photosensor, but also by sensing light intensity.
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Authors
Keisuke Tanaka, Yusuke Nakasone, Koji Okajima, Masahiko Ikeuchi, Satoru Tokutomi, Masahide Terazima,