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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ishikita, Hiroshi Saito, Keisuke Shen, Jian-ren |
| Description | Author Affiliation: Saito K ( Graduate School of Medicine, Kyoto University, Kyoto, Japan.) |
| Abstract | Most of the chlorophyll (Chl) cofactors in photosystem II (PSII) from Acaryochloris marina are Chl d , although a few Chl a molecules are also present. To evaluate the possibility that Chl a may participate in the P $_{D1}$ /P $_{D2}$ Chl pair in PSII from A. marina , the P $_{D1}^{•+}$ /P $_{D2}^{•+}$ charge ratio was investigated using the PSII crystal structure analyzed at 1.9-Å resolution, while considering all possibilities for the Chl d -containing P $_{D1}$ /P $_{D2}$ pair, i.e., Chl d /Chl d , Chl a /Chl d , and Chl d /Chl a pairs. Chl d /Chl d and Chl a /Chl d pairs resulted in a large P $_{D1}^{•+}$ population relative to P $_{D2}^{•+}$ , as identified in Chl a /Chl a homodimer pairs in PSII from other species, e.g., Thermosynechococcus elongatus PSII. However, the Chl d /Chl a pair possessed a P $_{D1}^{•+}$ /P $_{D2}^{•+}$ ratio of approximately 50/50, which is in contrast to previous spectroscopic studies on A. marina PSII. The present results strongly exclude the possibility that the Chl d /Chl a pair serves as P $_{D1}$ /P $_{D2}$ in A. marina PSII. This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: from Natural to Artificial. |
| ISSN | 00063002 |
| Journal | Biochimica et Biophysica Acta (BBA) - Reviews on Cancer |
| Issue Number | 8 |
| Volume Number | 1817 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2012-08-01 |
| Publisher Place | Netherlands |
| Access Restriction | Open |
| Subject Keyword | Chlorophyll Chemistry Photosystem II Protein Complex Photosynthesis Protein Multimerization Research Support, Non-U.S. Gov't Biochemistry |
| Content Type | Text |
| Resource Type | Article |
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