A variety of glycolipids in green photosynthetic bacteria: cyclopropane-ring formation in the acyl groups of glycolipids is crucial for acid and thermal resistance of antenna systems
| Project/Area Number |
24550065
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Organic chemistry
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| Research Institution | Ritsumeikan University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Keywords | 糖脂質 / 脂肪酸 / 光合成 / クロロフィル / 精密計測 / 光合成細菌 / 脂質 / 生体分子 / カロテノイド / 超精密計測 |
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| Outline of Final Research Achievements |
Green photosynthetic bacteria have unique antenna systems called chlorosomes. A themophilic bacterium Chlorobaculum tepidum strain biosynthesized MGDG and RGDG possessing a methylene-bridged palmitoleyl group characterized by a cis-substituted cyclopropane ring. The formation of the cyclopropane ring was chemically inhibited. The ring-formation represented direct and post-synthetic modifications of chlorosome membrane properties and was tolerant of acidic environments.
The glycolipids in various green bacteria were investigated. Dependence of the molecular structures including the chain-length of their acyl groups upon bacterial cultivation temperatures was clearly observed. The organisms with their optimal temperatures of 30, 45, and 55 ℃ dominantly accumulated glycolipids with the acyl chains in the range of C15-C16, C16-C17, and C18-C20, respectively. Based on the detailed of glycolipids, a survival strategy of green bacteria grown in the wide range of temperatures is proposed.
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Report
(4 results)
Research Products
(123 results)
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[Journal Article] Ene-thiol reaction of C3-vinylated chlorophyll derivatives in the presence of oxygen: synthesis of C3- formyl-chlorins under mild conditions2013
Author(s)
T. Fukusumi, N. Takei, Y. Tateno, T. Aoki, A. Ando, K. Kozakai, H. Shima, T. Mizoguchi, S. Ito, T. Ikeda, H. Tamiaki, T. Oba
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Journal Title
J. Porphyrins Phthalocyanines
Volume: 17
Issue: 12
Pages: 1188-1195
DOI
Related Report
Peer Reviewed
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[Journal Article] Ubiquity and quantitative significance of detoxification catabolism of chlorophyll associated with protistan herbivory2012
Author(s)
Y Kashiyam, A Yokoyama, Y Kinoshita, S Shoji, H Miyashita, T Shiratori, H Suga, K Ishikawa, A Ishikawa, I Inouye, K Ishida, D Fujinuma, K Aoki, M Kobayashi, S Nomoto, T Mizoguchi, H Tamiaki
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Journal Title
Proc. Natl. Acad. Sci. USA
Volume: 109
Issue: 43
Pages: 17328-17335
DOI
Related Report
Peer Reviewed
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