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Changes in Structural and Functional Properties of Oxygen-evolving Complex Induced by Replacement of D1-Glutamate 189 with Glutamine in Photosystem II
TLDR
A mutant that eliminates the carboxylate by replacing D1-Glu-189 with Gln in the cyanobacterium Synechocystis sp. Expand
Structural Changes of D1 C-terminal α-Carboxylate during S-state Cycling in Photosynthetic Oxygen Evolution*
TLDR
The results indicate that the α-carboxylate of C-terminal Ala-344 is structurally associated with a manganese ion that becomes oxidized upon the S1-to-S2 transition and reduced reversely upon theS3- to-S0 transition but is not associated with manganESE ion(s) oxidized during the S0-to theS1 (and S2-to -S3) transition(s). Expand
Mid- to low-frequency Fourier transform infrared spectra of S-state cycle for photosynthetic water oxidation in Synechocystis sp. PCC 6803.
TLDR
The trends of S-state dependence in the 1700-1200 cm(-1) frequency spectra of the PS II cores from Synechocystis were comparable to that of spinach, indicating that the structural changes of the polypeptide backbones and amino acid side chains that occur during the oxygen evolution are inherently identical between cyanobacteria and higher plants. Expand
Light-induced structural changes in a putative blue-light receptor with a novel FAD binding fold sensor of blue-light using FAD (BLUF); Slr1694 of synechocystis sp. PCC6803.
TLDR
Slr1694 was found to show the same red-shift of flavin absorption and quenching of Flavin fluorescence by illumination by illumination as those of AppA, indicating that Slr16 94 is a blue-light receptor based on BLUF with the similar photocycle to that ofAppA. Expand
Changes in the functional and structural properties of the Mn cluster induced by replacing the side group of the C-terminus of the D1 protein of photosystem II.
TLDR
The results indicated that the structural perturbations induced by the Val substitution include large changes of the protein backbone and are considerably different from thoseinduced by the other substitutions, which was interpreted to mean that similar types ofChanges of the carboxylate ligands are induced by these substitutions. Expand
Impact of Replacement of D1 C-terminal Alanine with Glycine on Structure and Function of Photosynthetic Oxygen-evolving Complex*
TLDR
The results indicate that the internal structure of the Mn clusters and/or the interaction between the Mn cluster and its ligand are considerably altered by a simple change in the side group, from methyl to hydrogen, at the C-terminal of the D1 protein. Expand
Changes of low-frequency vibrational modes induced by universal 15N- and 13C-isotope labeling in S2/S1 FTIR difference spectrum of oxygen-evolving complex.
TLDR
Results indicated that most of the vibrational modes found in the low-frequency spectrum are derived from the coupling between the Mn-cluster and groups containing nitrogen and/or carbon atom(s) in a direct manner and/ or through hydrogen bonding. Expand
FTIR detection of structural changes in a histidine ligand during S-state cycling of photosynthetic oxygen-evolving complex.
TLDR
The results indicate that a single histidine residue coupled with the structural changes of the OEC during the S-state cycling is responsible for the observed histidine bands, in which the histidine modes changed duringThe S(0)-to-S(1) transition are reversed upon the S(1-to-s(2) and S(2)-to theS(3) transitions. Expand
Transient dimerization and conformational change of a BLUF protein: YcgF.
TLDR
The photochemical reaction dynamics of YcgF, a BLUF protein, were investigated by the pulsed laser-induced transient grating (TG) technique, showing clear evidence that a conformational change leading to an increase in interactions with water molecules occurs upon formation of the signaling state. Expand
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