2011 Fiscal Year Final Research Report
Investigation of the intermediary steps and electron transfer mechanism of heme degradation by heme oxygenase
| Project/Area Number |
21590321
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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 |
General medical chemistry
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| Research Institution | Kurume University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
HIGASHIMOTO Yuichirou 久留米大学, 医学部, 准教授 (40352124)
SATO Hideaki 久留米大学, 医学部, 准教授 (60271996)
SUGISHIMA Masakazu 久留米大学, 医学部, 講師 (30379292)
SAKAMOTO Hiroshi 九州工業大学, 情報工学部, 准教授 (70309748)
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| Research Collaborator |
GRAHAM Palmer Rice Univ, Cell Biol, Dept. Biochem.
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| Project Period (FY) |
2009 – 2011
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| Keywords | 生体分子医学 / ヘム分解 |
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| Research Abstract |
Heme oxygenase(HO) catalyzes the heme degradation utilizing molecular oxygen and reducing equivalents from NADPH-cytochrome P450 reductase(CPR). The purposes of this study are the characterization of electron pathway between NAPDH bound to CPR to heme bound to HO. To probe the cleavage mechanism of oxaporphyrin ring of ferrousα-verdoheme, an intermediate in the HO reaction, ferrous verdoheme-rat HO-1 complex was prepared under anaerobic conditions. Electrochemical reduction of the complex was performed under anaerobic conditions and the reduction potential for one-electron reduction of the oxaporphyrin ring of ferrous verdoheme was determined. Effects of ligands such as CO on the electrochemical reduction and the electron transfer from NADPH-cytochrome P450 reductase to the complex were investigated. In addition, the crystal structure of rat HO-1 in complex with ferrousα-verdoheme was determined.
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[Journal Article] Amonogalactosyldiacylglycerol synthase found inthe green sulfur bacterium Chlorobaculumtepidum reveals important roles for galactolipidsin photosynthesis2011
Author(s)
S. Masuda, J. Harada, M. Yokono, Y. Yuzawa, M. Shimojima, K. Murofushi, H. Tanaka, H. Masuda, M. Murakawa, T. Haraguchi, M. Nishimura, H. Yuasa, M. Noguchi, H. Oh-oka, A. Tanaka, H. Tamiaki, and H. Ohta
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Journal Title
Plant cell
Volume: 23(7)
Pages: 2644-2658
Peer Reviewed
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