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    Home > Food News > Food Articles > The three-dimensional structure of the atomic level of the diatom photodevelithing structure is revealed for the first time

    The three-dimensional structure of the atomic level of the diatom photodevelithing structure is revealed for the first time

    • Last Update: 2021-02-26
    • Source: Internet
    • Author: User
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    Plant, led by Tsinghua University's Yu Senfang academician, the research team and the institute Shen Jianren researcher, Yan Tingyun academician led by the team, the international first analysis of a central diatom - Chaetoceros gracilis light The three-dimensional structure of the 3.0 E resolution of the system II-optical antenna supercomputer provides a new theoretical basis for the theoretical calculation of photosynthmodial and the study of artificial simulation photosynthromalization, and also provides a new idea for the follow-up guidance and design of new crops and the improvement of the efficiency of light capture and light protection of crops. The results were published on August 2 in science, an internationally renowned academic journal.according to
    , diatoms are one of the major plankton in the ocean, contribute about 20% of the earth's primary productivity each year, and play an important role in the bio-geochemical cycle, these characteristics are closely related to its optical system and the function of the outer light capture antenna. Unlike green algae and higher plants, the outer light capture antenna of diatom light system II (PSII) is a protein (FCPs) that combines algal lutein and curvature a/c, with powerful blue-green light capture and rapid light adaptation. However, the energy transfer, conversion and light protection mechanisms of the diatom PSII-FCPII supercomputer have not been clarified for a long time.
    using single-particle frozen electroscope technology, researchers found that the PSII-FCPII super pigment protein complex of diatoms consists of two monobodies containing 230 chlorophylla molecules, 58 chlorophyl c molecules, 146 carotenoid molecules, and manganese clusters. Complexes, electron transfer bodies, and large numbers of lipid molecules, etc.; the reaction center of diatom PSII-FCPII is similar to cyanobacteria and red algae, but has two additional core sub-base and a unique outer perennial oxygen sub-base, and the sub-base arrangement of the outer antenna is significantly different from that of known green algae and higher plants. In the diatom PSII-FCPII complex, the researchers found several ways in which optical capture antennas transmit energy to the reaction center, as well as potentially important non-photochemical quenching points and protective oxygenation reaction centers.
    Shen Jianren and Yan Tingyun have been working on advanced plant and algae light systems and optical antenna proteins. In early 2019, the team first reported on the crystal structure of the 1.8-E resolution of the feathered diatom, the triangular brown-fingered algal FTP diglomerate, depicting the binding details of chlorocyte c and algal lutein in the diatom photosynthel protein. The results are the expansion of the team's research work on the structure and function of pre-photohemolysis protein.
    Science, in a review of "How diatoms harvest light" written by German photosynthmic research expert Professor Claudia Büchel, in the same journal, praised the two findings of diatoms as "outstanding research in the field", which revealed the diversity and flexibility of the diatom FTP optical capture antenna complex and is a landmark effort to study the diverse photoenedescing functions of members of the LHC super family of photosynthelates under different light ambient conditions.
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