Crossref journal-article
Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences (341)
Abstract

Phytochromes are an important class of chromoproteins that regulate many cellular and developmental responses to light in plants. The model plant species Arabidopsis thaliana possesses five phytochromes, which mediate distinct and overlapping responses to light. Photobiological analyses have established that, under continuous irradiation, phytochrome A is primarily responsible for plant's sensitivity to far-red light, whereas the other phytochromes respond mainly to red light. The present study reports that the far-red light sensitivity of phytochrome A depends on the structure of the linear tetrapyrrole (bilin) prosthetic group. By reconstitution of holophytochrome in vivo through feeding various synthetic bilins to chromophore-deficient mutants of Arabidopsis , the requirement for a double bond on the bilin D-ring for rescuing phytochrome A function has been established. In contrast, we show that phytochrome B function can be rescued with various bilin analogs with saturated D-ring substituents.

Bibliography

Hanzawa, H., Shinomura, T., Inomata, K., Kakiuchi, T., Kinoshita, H., Wada, K., & Furuya, M. (2002). Structural requirement of bilin chromophore for the photosensory specificity of phytochromes A and B. Proceedings of the National Academy of Sciences, 99(7), 4725–4729.

Authors 7
  1. Hiroko Hanzawa (first)
  2. Tomoko Shinomura (additional)
  3. Katsuhiko Inomata (additional)
  4. Takashi Kakiuchi (additional)
  5. Hideki Kinoshita (additional)
  6. Keishiro Wada (additional)
  7. Masaki Furuya (additional)
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Dates
Type When
Created 23 years, 1 month ago (July 26, 2002, 10:37 a.m.)
Deposited 3 years, 4 months ago (April 12, 2022, 3:38 p.m.)
Indexed 1 year, 2 months ago (June 6, 2024, 2:35 a.m.)
Issued 23 years, 4 months ago (April 2, 2002)
Published 23 years, 4 months ago (April 2, 2002)
Published Online 23 years, 4 months ago (April 2, 2002)
Published Print 23 years, 4 months ago (April 2, 2002)
Funders 0

None

@article{Hanzawa_2002, title={Structural requirement of bilin chromophore for the photosensory specificity of phytochromes A and B}, volume={99}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.062713399}, DOI={10.1073/pnas.062713399}, number={7}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Hanzawa, Hiroko and Shinomura, Tomoko and Inomata, Katsuhiko and Kakiuchi, Takashi and Kinoshita, Hideki and Wada, Keishiro and Furuya, Masaki}, year={2002}, month=apr, pages={4725–4729} }