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Niche adaptation and genome expansion in the chlorophyll d-producing cyanobacterium Acaryochloris marina
Key features of the complete genome of A. marina show that the genus Acaryochloris is a fitting candidate for understanding genome expansion, gene acquisition, ecological adaptation, and photosystem modification in the cyanobacteria. Expand
Is the primary cause of thermal inactivation of oxygen evolution in spinach PS II membranes release of the extrinsic 33 kDa protein or of Mn
Abstract Incubation of PS II membranes at 45–50°C for several min resulted in strong inactivation of oxygen evolution, concomitant with release of Mn and the extrinsic proteins of 33, 23 and 17 kDa.Expand
Identification of the special pair of photosystem II in a chlorophyll d-dominated cyanobacterium
The findings lend support to the idea that changes in photosynthetic pigments combine with a modification of the redox potentials of electron transfer components to give rise to an energetic adjustment of the total reaction system. Expand
Redox potentials of primary electron acceptor quinone molecule (QA)− and conserved energetics of photosystem II in cyanobacteria with chlorophyll a and chlorophyll d
In the two cyanobacteria, the energetics in PS II were conserved, even though the potentials of QA− and Phe a− were relatively shifted depending on the special pair, indicating a common strategy for electron transfer in oxygenic photosynthetic organisms. Expand
Purification and characterization of a stable oxygen-evolving Photosystem II complex from a marine centric diatom, Chaetoceros gracilis.
In this study, a purified PSII complex which was deprived of major components of FCP was isolated by one step of anion exchange chromatography from the crude PSII treated with Triton X-100 and succeeded for the first time in preparation of a stable PSII from diatom cells. Expand
Binding and Functional Properties of Five Extrinsic Proteins in Oxygen-evolving Photosystem II from a Marine Centric Diatom, Chaetoceros gracilis*
Interestingly, PSII reconstituted with Psb31 alone considerably restored the oxygen evolving activity in the absence of PsbO, indicating that Psb 31 serves as a substitute in part for Psb O in supporting oxygen evolution. Expand
Metabolic engineering of the Chl d-dominated cyanobacterium Acaryochloris marina: production of a novel Chl species by the introduction of the chlorophyllide a oxygenase gene.
A transformation system for a Chl d-dominated cyanobacterium, Acaryochloris marina, is established for the first time, demonstrating the flexibility of the Chl biosynthetic pathway for the production of novel Chl species, indicating that a new organism with a novel ChL might be discovered in the future. Expand
Redox potential of pheophytin a in photosystem II of two cyanobacteria having the different special pair chlorophylls
Water oxidation by photosystem (PS) II in oxygenic photosynthetic organisms is a major source of energy on the earth, leading to the production of a stable reductant. Mechanisms generating a highExpand
Binding and functional properties of the extrinsic proteins in oxygen-evolving photosystem II particle from a green alga, Chlamydomonas reinhardtii having his-tagged CP47.
Results indicate that the acceptor side, Q(B) site, was altered in the PSII particles but its donor side remained intact, and suggest that each of the three extrinsic proteins has their own binding sites independent of the others in the green algal PSII. Expand
Fourier transform infrared study of the cation radical of P680 in the photosystem II reaction center: evidence for charge delocalization on the chlorophyll dimer.
Structural models of Chl molecules including P680 and ChlT and their coupling in the cation, triplet, and Qy singlet states are discussed, leading to the idea that the triplet state migrates to a Chl different from P680 at low temperatures. Expand