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- W4285728660 endingPage "886" @default.
- W4285728660 startingPage "871" @default.
- W4285728660 abstract "Conformational changes play an important role in the functioning of proteins and their complexes. This is also true for the pigment-protein super-complex of photosystem II (PSII). The data testify about the pH-induced macromolecular conformational changes in the water-oxidizing complex (WOC) on the donor side of PSII, the interaction between the spatial structure of WOC proteins and the distribution of cytochrome b559 redox-forms, and the electron transfer efficiency between QA and QB on the acceptor side of PSII. Changes in the protein environment near QA and QB can be observed after the removal of the bicarbonate ion associated with non-heme Fe or after the addition of herbicides binding to the QB site, which results in the suppression of the electron transfer in this site. The “locking” of the de novo assembled PSII in an inactive state until WOC activation is also accompanied by strong structural perturbations on the PSII acceptor and donor sides with the participation of Psb28 and Psb27 proteins. The triggers for degradation and replacement of damaged PSII proteins are structural changes induced by their oxidative modification and aggregation. Macromolecular changes in the antenna proteins underlie the activation of photoprotective non-photochemical quenching, which are induced by protonation of the lumenal residues of PsbS or/and Lhcsr3, as well as the phosphorylation of antenna proteins. Besides this, many smaller-scale conformational changes may occur in PSII. This review summarizes current knowledge about the possible conformational changes in proteins in the PSII super-complex and describes their proposed influence on PSII function." @default.
- W4285728660 created "2022-07-18" @default.
- W4285728660 creator A5015338171 @default.
- W4285728660 date "2022-07-18" @default.
- W4285728660 modified "2023-10-16" @default.
- W4285728660 title "Macromolecular conformational changes in photosystem II: interaction between structure and function" @default.
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