2016 Fiscal Year Final Research Report
Optimization of the protein structure for synthesis of single crystal nanoparticles
| Project/Area Number |
25390020
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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 |
Nanomaterials chemistry
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| Research Institution | Meiji University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
TAKAHASHI Takuya 立命館大学, 生命科学部, 教授 (70262102)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Keywords | ナノ粒子 / 強磁性体 / フェリチン |
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| Outline of Final Research Achievements |
To synthesize uniform single nano-crystal in the protein (ferritin) cavity, we have tried mutagenesis of the ferritin subunit. Ferritin molecule is consisted in 24 of H and L subunits. H-subunit has an iron oxidation site and H-ferritin which has 24 H-subunits rapidly produces magnetite nanoparticle in the cavity and thus nanoparticles are polycrystalline. H- ferritin is easy to make coagulation during synthesis. L-ferritin which has 24 L-subunits can also produce magnetite nanoparticles even it has no iron oxidation site, whereas efficiency is lower than H-ferritin. Then we have introduced iron oxidation site in the L-subunit and tried to express this mutant with L subunits simultaneously and construct a chimera-ferritin molecule. However, the oxidation activity was similar as the wild type. Then, we have tried to optimize synthesis condition using L-ferritin and found single nano-crystal can be obtained effectively by incubating L- ferritin at 60 degrees with keeping pH at 8.5.
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| Free Research Field |
生物物理学
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