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A photosystem I reaction center driven by chlorophyll d in oxygenic photosynthesis.
- Q. Hu, H. Miyashita, +4 authors S. Itoh
- Biology, Medicine
- Proceedings of the National Academy of Sciences…
- 27 October 1998
A far-red type of oxygenic photosynthesis was discovered in Acaryochloris marina, a recently found marine prokaryote that produces an atypical pigment chlorophyll d (Chl d) that might either be an acclimation to theFar-red light environments or an evolutionary intermediate between the red-absorbing oxygenic and the far- red absorbing anoxygenic photosynthesis that uses bacteriochlorophylls. Expand
Structural basis for dynamic mechanism of proton-coupled symport by the peptide transporter POT
- S. Doki, Hideaki E. Kato, +10 authors O. Nureki
- Chemistry, Medicine
- Proceedings of the National Academy of Sciences
- 24 June 2013
High-resolution crystal structures of a bacterial POT family transporter, including its complex with a dipeptide analog, alafosfalin, revealed the key mechanistic and functional roles for a conserved glutamate residue (Glu310) in the peptide binding site. Expand
Destruction of photosystem I iron‐sulfur centers in leaves of Cucumis sativus L. by weak illumination at chilling temperatures
It is concluded that weak‐light treatment of cucumber leaves at chilling temperature destroys FX, FA and FB and possibly A1, which gives the molecular basis for the mechanism of selective PSI photodamage that was recently reported. Expand
Modification of photosystem I reaction center by the extraction and exchange of chlorophylls and quinones.
The photosystem (PS) I photosynthetic reaction center was modified thorough the selective extraction and exchange of chlorophylls and quinones to enable accurate detection of the primary photoreactions with little disturbance from the absorbance changes of the bulk pigments. Expand
Function of chlorophyll d in reaction centers of photosystems I and II of the oxygenic photosynthesis of Acaryochloris marina.
- S. Itoh, H. Mino, K. Itoh, T. Shigenaga, Tatsuya Uzumaki, M. Iwaki
- Chemistry, Medicine
- 6 October 2007
Reaction center chlorophylls (Chls) in photosystems II and I were studied in the isolated thylakoid membranes of a cyanobacterium, Acaryochloris marina, which contains Chls d and a as the major and… Expand
ESR signal of the iron-sulfur center F(X) and its function in the homodimeric reaction center of Heliobacterium modesticaldum.
- R. Miyamoto, M. Iwaki, H. Mino, J. Harada, S. Itoh, H. Oh-oka
- Chemistry, Medicine
- 28 April 2006
The reactions of F(X) and quinone were discussed on the basis of the three-dimensional structural model of RC that predicts the conserved F( X)-binding site and the quin one-binding site, which is more hydrophilic than that in the photosystem I RC. Expand
Phosphatidylglycerol requirement for the function of electron acceptor plastoquinone Q(B) in the photosystem II reaction center.
These results suggest that the function of Q(B) plastoquinone was inactivated by the PG deprivation, and it is assumed that PG is an indispensable component of the photosystem II reaction center complex to maintain the structural integrity of the Q( B)-binding site. Expand
Electron transfer in spinach photosystem I reaction center containing benzo‐, naphtho‐ and anthraquinones in place of phylloquinone
Quinone; Phylloquinone; Vitamin K1; Photosystem I; Reaction center; Electron transfer; Photosynthesis
Electron spin echo of spin-polarised radical pairs in intact and quinone-reconstituted plant photosystem I reaction centers
Abstract Light-induced spin-polarised P700+A1− pairs in intact and quinone-reconstituted photosystem I reaction centres were studied by electron spin echo (ESE) spectroscopy. The observed strong ESE… Expand
The role of nitric oxide synthase in endotoxin-induced uveitis: effects of NG-nitro L-arginine.
- M. Mandai, N. Yoshimura, M. Yoshida, M. Iwaki, Y. Honda
- Investigative ophthalmology & visual science
- 1 September 1994
Because inhibition of iNOS activity reduced the inflammatory response, suppression of NO formation may inhibit the development of EIU. Expand