2000 Fiscal Year Final Research Report Summary
Determination of OHC protein motor
| Project/Area Number |
11694236
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Otorhinolaryngology
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| Research Institution | Tohoku University |
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Principal Investigator |
WADA Hiroshi Graduate School of Engineering, Tohoku University, Professor, 大学院・工学研究科, 教授 (30111264)
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| Co-Investigator(Kenkyū-buntansha) |
SUGAWARA Michiko Graduate School of Engineering, Tohoku University, Research Associate, 大学院・工学研究科, 助手 (30323041)
IKEDA Katsuhisa Tohoku University School of Medicine, Assistant Professor, 大学院・医学系研究科, 助教授 (70159614)
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| Project Period (FY) |
1999 – 2000
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| Keywords | Outer hair cell / Gene / Protein motor / Prestin / Polymerase chain reaction |
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| Research Abstract |
It is estimated that the origin of the motility of the outer hair cell (OHC) in response to electrical stimulation is the conformational change of the motor protein in the lateral wall of the cell. However, this mechanism has not been clarified yet. Therefore, in this study, firstly, the organ of Corti was removed from the guinea pig and the organ of Corti cDNA library was constructed. Then, after each clone was sequenced, an attempt was made to identify the motor protein by analyzing the sequence and tissue expression. As a result, two putative novel genes which might play an important role in the cochlea were found. However, P.Dallos et al. identified the gene that codes for the motor protein and designated it "Prestin" (Nature 405 : 149-155, 2000). Therefore, after that, based on the base sequences of prestin opened to the public web site, an attempt was made to clone gerbil prestin cDNA by polymerase chain reaction (PCR). The results are as follows :
1. As the full length coding sequence of prestin cDNA is quite long and it is difficult to obtain it directly from the gerbil cochlear cDNA, firstly, four fragments of prestin were obtained. Then, these fragments were combined by PCR.As a result, the full length coding sequence of prestin cDNA is obtained.
2. The combining method is useful to clone long cDNA by PCR.In this method, in order to exclude an error in the combined region, it is important to consider the reaction condition of combining method, e.g., the annealing temperature, time, and so on.
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Research Products
(2 results)
