| Project/Area Number |
16K14897
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Applied biochemistry
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| Research Institution | Tohoku University |
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Principal Investigator |
Kaneko Jun 東北大学, 農学研究科, 准教授 (30221188)
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | β-PFTs / 膜孔形成機構 / Staphylococcus / beta-pore forming toxin / cell specificity / pore forming mechanism / タンパク質工学 / βバレル形成機能 / ナノツール |
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| Outline of Final Research Achievements |
Molecular mechanism of beta-barrel membrane pore-forming toxin of Staphylococcus aureus was investigated.
In target cell specificity, loop 4 of Hlg2 and LukE rim domain, which contacts with host cell surface, was essential to binding to human erythrocytes, and loop1 and 2 were found to be assisting the binding. We also found that the interaction between Asp in the cap region involved in the prestem retention in LukF and basic amino acids in the adjacent Hlg2 cap site by membrane pore formation involved in the prestem release of γ-hemolysin. Furthermore, double cysteine mutant of α-hemolysin capable of regulating the release of prestem was constructed. Using this system, now the residues involved in the stem insertion are being analyzed.
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