Back to Search
Start Over
A photoactive carotenoid protein acting as light intensity sensor
- Source :
- Proceedings of the National Academy of Sciences of the United States of America 33 (105), 12075-12080. (2008), Proceedings of the National Academy of Sciences of the United States of America, Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2008, 105 (33), pp.12075-12080. ⟨10.1073/pnas.0804636105⟩, Proceedings of the National Academy of Sciences of the United States of America, 105(33), 12075-12080. National Acad Sciences, Wilson, A, Punginelli, C, Gall, A, Bonetti, C, Alexandre, M T A, Routaboul, J M, Kerfeld, C A, van Grondelle, R, Robert, B, Kennis, J T M & Kirilovsky, D 2008, ' A photoactive carotenoid protein acting as light intensity sensor ', Proceedings of the National Academy of Sciences of the United States of America, vol. 105, no. 33, pp. 12075-12080 . https://doi.org/10.1073/pnas.0804636105, Proc Natl Acad Sci U, Proc Natl Acad Sci U, 2008, 105, pp.12075-12080, Proceedings of the National Academy of Sciences of the United States of America, 2008, 105 (33), pp.12075-12080. ⟨10.1073/pnas.0804636105⟩, Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2008, 105 (33), pp.12075-12080. ⟨10.1073/pnas.0804636105 ⟩, Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2008, 105, pp.12075-12080, Proceedings of the National Academy of Sciences of the United States of America, 2008, 105, pp.12075-12080
- Publication Year :
- 2008
-
Abstract
- Intense sunlight is dangerous for photosynthetic organisms. Cyanobacteria, like plants, protect themselves from light-induced stress by dissipating excess absorbed energy as heat. Recently, it was discovered that a soluble orange carotenoid protein, the OCP, is essential for this photoprotective mechanism. Here we show that the OCP is also a member of the family of photoactive proteins; it is a unique example of a photoactive protein containing a carotenoid as the photoresponsive chromophore. Upon illumination with blue-green light, the OCP undergoes a reversible transformation from its dark stable orange form to a red "active" form. The red form is essential for the induction of the photoprotective mechanism. The illumination induces structural changes affecting both the carotenoid and the protein. Thus, the OCP is a photoactive protein that senses light intensity and triggers photoprotection. © 2008 by The National Academy of Sciences of the USA.
- Subjects :
- 0106 biological sciences
Cyanobacteria
Models, Molecular
[ SDV.BBM.BP ] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biophysics
Light
Photochemistry
[SDV]Life Sciences [q-bio]
Color
[SDV.BBM.BP] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biophysics
cyanobactérie
Biology
Photosynthesis
01 natural sciences
cyanobacteria
03 medical and health sciences
Bacterial Proteins
photosynthèse
Carotenoid
030304 developmental biology
chemistry.chemical_classification
0303 health sciences
Multidisciplinary
Orange carotenoid protein
Synechocystis
organisme
Chromophore
Biological Sciences
biology.organism_classification
Carotenoids
phycobilisome
intensité lumineuse
Protein Structure, Tertiary
nonphotochemical quenching
[SDV.BBM.BP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biophysics
Light intensity
photoprotection
chemistry
Photoprotection
Phycobilisome
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 00278424 and 10916490
- Database :
- OpenAIRE
- Journal :
- Proceedings of the National Academy of Sciences of the United States of America 33 (105), 12075-12080. (2008), Proceedings of the National Academy of Sciences of the United States of America, Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2008, 105 (33), pp.12075-12080. ⟨10.1073/pnas.0804636105⟩, Proceedings of the National Academy of Sciences of the United States of America, 105(33), 12075-12080. National Acad Sciences, Wilson, A, Punginelli, C, Gall, A, Bonetti, C, Alexandre, M T A, Routaboul, J M, Kerfeld, C A, van Grondelle, R, Robert, B, Kennis, J T M & Kirilovsky, D 2008, ' A photoactive carotenoid protein acting as light intensity sensor ', Proceedings of the National Academy of Sciences of the United States of America, vol. 105, no. 33, pp. 12075-12080 . https://doi.org/10.1073/pnas.0804636105, Proc Natl Acad Sci U, Proc Natl Acad Sci U, 2008, 105, pp.12075-12080, Proceedings of the National Academy of Sciences of the United States of America, 2008, 105 (33), pp.12075-12080. ⟨10.1073/pnas.0804636105⟩, Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2008, 105 (33), pp.12075-12080. ⟨10.1073/pnas.0804636105 ⟩, Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2008, 105, pp.12075-12080, Proceedings of the National Academy of Sciences of the United States of America, 2008, 105, pp.12075-12080
- Accession number :
- edsair.doi.dedup.....dc7bb1e614889ba8127d0dcd05ae002f