Defenses against excess light in diatoms: molecular regulatory mechanism of light-harvesting pigment proteins
December 7, 2020
A new Raman Probe for plant cells
A joint research group from Okayama University and Kobe University, as well as RIKEN CSRS, succeeded in analyzing the expression of light-harvesting pigment protein (fucoxanthin chlorophyll a/c-binding protein: FCP) in a diatom Phaeodactylum tricornutum under excessively strong light and the excitation-energy transfer mechanism using time-resolved fluorescence spectroscopy. These results showed that Phaeodactylum regulates the molecular structure and excitation-energy transfer pathway of FCP under excessively strong light, inducing energy quenching.
The results of this study will give an answer to a question "How do diatoms regulate and function the light-harvesting pigment protein FCP when receiving stress from excessively strong light?" This optical response mechanism may be part of an important survival strategy for diatoms.
Biochimica et Biophysica Acta - Bioenergetics doi:10.1016/j.bbabio.2020.148350
R. Nagao, M. Yokono, Y. Ueno, T. Suzuki, M. Kumazawa, K. Kato, N. Tsuboshita, N. Dohmae, K. Ifuku, J. Shen, S. Akimoto,
"Enhancement of excitation-energy quenching in fucoxanthin chlorophyll a/c-binding proteins isolated from a diatom Phaeodactylum tricornutum upon excess-light illumination".
Biomolecular Characterization Unit