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2022 Fiscal Year Final Research Report

Elucidation of the role of adaptor proteins newly discovered by phosphoproteomics

Research Project

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Project/Area Number 20K06548
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43030:Functional biochemistry-related
Research InstitutionShinshu University

Principal Investigator

Konishi Hiroaki  信州大学, 学術研究院農学系, 教授 (40252811)

Project Period (FY) 2020-04-01 – 2023-03-31
Keywords細胞情報伝達 / 細胞増殖 / タンパク質凝集 / アダプタータンパク質 / 神経変性疾患
Outline of Final Research Achievements

Two new findings on GAREM, an adaptor protein that functions downstream of the epidermal growth factor (EGF) receptor and is involved in the regulation of the phosphatase Erk, have been reported.
1) GAREM2, a molecular species abundantly expressed in mammalian brain, localizes throughout the cytoplasm before EGF stimulation in cultured cells, but after stimulation, GAREM2 forms characteristic granules that undergo significant localization changes before and after stimulation. GAREM2, a molecular species abundantly expressed in mammalian brain, localizes throughout the cytoplasm before EGF stimulation in cultured cells.
2) GAREM1, which is ubiquitously expressed in mammal, was shown to be required for proliferation and growth of cells and individual animals by analysis of gene-deficient cells and mice.

Free Research Field

機能生物化学

Academic Significance and Societal Importance of the Research Achievements

脳ではいくつかのタンパク質の凝集がアルツハイマー病やハンチントン病などの神経変性疾患に関与していることが知られている。本研究では、脳特異的に発現するGAREM2のみが細胞増殖因子刺激依存的に凝集するという現象を見出し、それがGAREM2のGRDに依存し、GRDを持たないGAREM1は凝集が起こらないことを明らかにした。神経変性疾患の原因タンパク質間にはアミノ酸配列の共通性がなく、その凝集機構は未だ不明な点が多い。本研究の結果は、GAREM2が神経変性疾患の新たな凝集タンパク質である可能性を提示し、その凝集機構をさらに詳細に解明することで、神経変性疾患治療法の開発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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