2016 Fiscal Year Final Research Report
Verification of the force-dependent binding of an alpha-catenin to an actn filament
| Project/Area Number |
15K21444
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Biological physics/Chemical physics/Soft matter physics
Biophysics
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| Research Institution | Waseda University |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Keywords | 細胞間接着 / アクチンフィラメント / カテニン / 蛍光タンパク質 |
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| Outline of Final Research Achievements |
The application was planned to unravel the force dependency of binding property between alpha-catenin in cadherin-catenin complex (CCC) and actin filament (AF). However, just after the start of our research, other group published a report about identical interest. For that reason, we shifted main focus to the next interest of dynamic property of a-catenin dimerization in cells. To this end, we aimed developing novel genetically encoded fluorescence dimerization sensor by utilizing UnaG, because conventional dimerization sensors are unsuitable for analyzing dynamic association/dissociation of proteins. As essential information for the developing dimerization sensor from UnaG, we determined the monomeric dispersion of apoUnaG and holoUnaG and the association/dissociation rate constant of UnaG and bilirubin. Furthermore, we discover that holoUnaG take distinct two fluorescent states defined by 23% and 92% quantum efficiency, and fluctuate between the two states.
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| Free Research Field |
生物物理
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