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2018 Fiscal Year Final Research Report

Mechanistic characterization of translocon as a folding machinery for membrane proteins

Research Project

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Project/Area Number 16H04766
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Functional biochemistry
Research InstitutionUniversity of Hyogo

Principal Investigator

Sakaguchi Masao  兵庫県立大学, 生命理学研究科, 教授 (30205736)

Project Period (FY) 2016-04-01 – 2019-03-31
Keywords膜タンパク質 / 細胞小器官
Outline of Final Research Achievements

Membrane proteins have many essential roles in cells. We analyzed the novel functions of endoplasmic reticulum translocon involved in their three-dimensional structure formation. The translocon channel has been shown to have a novel functional site that accepts moderate hydrophobic sequences. The site of action was identified by systematic chemical crosslinking. By exploiting newly developed probes, we have found novel genes related to membrane translocation and integration of proteins. These genes possess various qualitative effects on the translocon action.

Free Research Field

分子細胞生物学

Academic Significance and Societal Importance of the Research Achievements

内在性膜タンパク質は細胞の生命維持に必須であり、その構造形成過程の理解は生命活動の理解や、医学薬学農学領域の応用分野の基盤として重要である。この過程は、タンパク質の構造形成にはその配列特性のみで十分であるとするアンフィンゼンドグマに反し、構造規定因子が決定的に重要であることを示した。本研究で解明された新規知見は、膜タンパク質構造形成の新しい側面を解明すると同時に、新規機能性膜タンパク質のデザインや、疾病の新規病因解明につながると期待される。

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Published: 2020-03-30  

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