A new light energy flow model connecting from sunlight to marine ecosystem
| Project/Area Number |
15H02800
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
Fiscal Year 2017: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2016: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2015: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
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| Keywords | 海洋微生物 / ロドプシン / 微生物生態 / 光エネルギー / 海洋細菌 / 海洋生態 / 細菌 / ゲノム |
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| Outline of Final Research Achievements |
In this research, the following results were obtained from genomic and metagenomic data analysis and experiments using molecular biological methods.
1. The light-adaptation strategies of marine bacteria possessing proteorhodopsin were clarified. 2. The structural analysis of Na+ and Cl- pumping rhodopsin (KR2 and NM-R3) found in marine bacteria revealed these ion transport mechanisms. 3. The functions of unknown microbial rhodopsins present in various environments were clarified.
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| Academic Significance and Societal Importance of the Research Achievements |
地球表層の約７割を占める海洋で、どのような生物が、どのような機構を用いて太陽から光エネルギーを受容しているのか？一般的には、海洋表層に生息する植物プランクトンが光合成により光エネルギーを利用していると答えるのが常識である。しかしながら、近年の遺伝子解析手法の発展に伴い多くの海洋細菌がロドプシンを用いて太陽光からエネルギーを受け取っていることが分かってきた。本研究では、生態系を支えるエネルギー基盤である太陽光が、ロドプシンを通してどのように海洋生態系に流れ込むのかを明らかにするため、海洋細菌の持つロドプシンの網羅的探索および機能解析を実施し、複数の新規ロドプシンの機能を明らかにした。
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Report
(4 results)
Research Products
(30 results)
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[Journal Article] Structural mechanism for light-driven transport by a new type of chloride ion pump, Nonlabens marinus rhodopsin-32016
Author(s)
Toshiaki Hosaka, Susumu Yoshizawa, Yu Nakajima, Noboru Ohsawa, Masakatsu Hato, Edward F. DeLong, Kazuhiro Kogure, Shigeyuki Yokoyama, Tomomi Kimura-Someya, Wataru Iwasaki and Mikako Shirouzu
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Journal Title
Journal of Biological Chemistry
Volume: 291
Issue: 34
Pages: 17488-17495
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Structural basis for Na+ transport mechanism by a light-driven Na+ pump2015
Author(s)
H. E. Kato, K. Inoue, R. Abe-Yoshizumi, Y. Kato, H. Ono, M. Konno, S. Hososhima, T. Ishizuka, M. R. Hoque, H. Kunitomo, J. Ito, S. Yoshizawa, K. Yamashita, M. Takemoto, T. Nishizawa, R. Taniguchi, K. Kogure, A. D. Maturana, Y. Iino, H. Yawo, R. Ishitani, H. Kandori*, O. Nureki*
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Journal Title
Nature
Volume: 未定
Issue: 7550
Pages: 48-53
DOI
Related Report
Peer Reviewed / Open Access
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