2011 Fiscal Year Final Research Report
Research of the novelty and universal mechanism of photosystem II by the chlorophyll d having cyanobacteria
| Project/Area Number |
21570038
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Plant molecular biology/Plant physiology
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| Research Institution | Tokyo University of Science |
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Principal Investigator |
TOMO Tatsuya 東京理科大学, 理学部, 准教授 (60300886)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 光化学系II / クロロフィル / 酸化還元電位 |
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| Research Abstract |
A. marina is a photosynthetic cyanobacterium in which chlorophyll(Chl) d is the major antenna pigment. Chl d absorbs light with a wavelength up to 30 nm red-shifted from Chl a. Therefore, if Chl d was the special pair component, the overall energetics must be different in A. marina. We performed direct measurements of the redox potential of primary and secondary electron donor using purified Acaryochloris PS II and the Chl a-type PS II. We obtained positive potential shits for A. marina in PS II complexes. The difference in the redox potential of electron donors between the two species closely corresponded to the difference in the light energy absorbed by Chl a versus Chl d. These finding indicate that changes in Chl species modulates a specific potential change in reduction side in PS II.
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Research Products
(61 results)
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[Journal Article] Binding and Functional Properties of Five Extrinsic Proteins in Oxygen-evolving Photosystem II from a Marine Centric Diatom2010
Author(s)
Ryo Nagao, Akira Moriguchi, Tatsuya Tomo, Ayako Niikura, Saori Nakajima, Takehiro Suzuki, Akinori Okumura, Masako Iwai, Jian-Ren Shen, Masahiko Ikeuchi, Isao Enami
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Journal Title
J. Bio. Chem
Volume: 285
Pages: 29191-29199
Peer Reviewed
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[Journal Article] Purification and characterization of a stable oxygen-evolving Photosystem II complex from a marine centric diatom, Chaetoceros gracilis2010
Author(s)
Ryo Nagao, Tatsuya Tomo, Eri Noguchi, Saori Nakajima, Takehiro Suzuki, Akinori Okumura, Yasuhiro Kashino, Mamoru Mimuro, Masahiko Ikeuchi, Isao Enami
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Journal Title
Biochim. Biophys. Acta
Volume: 1797
Pages: 160-166
Peer Reviewed
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