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2022 Fiscal Year Final Research Report

Study on Rab6 effectors that regulate the secretory pathway

Research Project

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Project/Area Number 20K15739
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 43030:Functional biochemistry-related
Research InstitutionNational Institute of Infectious Diseases (2021-2022)
Tohoku University (2020)

Principal Investigator

Homma Yuta  国立感染症研究所, 細胞化学部, 流動研究員 (70812642)

Project Period (FY) 2020-04-01 – 2023-03-31
KeywordsRab / 小胞輸送 / 分泌経路
Outline of Final Research Achievements

A small GTPase Rab6 regulates the secretory pathway in mammalian cells, however, the molecular mechanism was not fully understood. In this study, biochemical and genetic analyses revealed the requirement of VPS52, a subunit of the GARP complex, for the secretory pathway. I showed that secretory cargos are not efficiently secreted and missorted to lysosomes in VPS52-deficient cells, the same as in Rab6-deficient cells. The functionally unknown C-terminal half of VPS52 was shown to be required for the secretory pathway.

Free Research Field

細胞生物学

Academic Significance and Societal Importance of the Research Achievements

分泌経路は、細胞が様々な分泌分子(可溶性分泌タンパク質や膜タンパク質)を細胞外(細胞膜)へと輸送する主要な経路であるが、それぞれの分泌分子がどのように選別・輸送されているかについての分子メカニズムは不明な点も多く残されている。本研究によってVPS52が分泌経路で機能することが明らかにされたことで、細胞の根幹的機能である分泌現象の基礎的な理解を進展させるとともに、分泌異常に関連する疾患の病態解明・治療等につながることが期待される。

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Published: 2024-01-30  

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