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2021 Fiscal Year Final Research Report

Structural basis of traslation regulation by dynamic interactions between the complexes

Research Project

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Project/Area Number 19H03172
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 43020:Structural biochemistry-related
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Ito Takuhiro  国立研究開発法人理化学研究所, 生命機能科学研究センター, チームリーダー (70401164)

Project Period (FY) 2019-04-01 – 2022-03-31
Keywords翻訳 / 翻訳開始因子 / 統合的ストレス応答 / 電子顕微鏡
Outline of Final Research Achievements

We determined two cryo-EM structures of the eIF2-eIF2B GEF-active productive complex and the phosphorylated eIF2 (eIF2-P)-eIF2B GEF-inactive nonproductive complex, and clarified the mechanism of eIF2 activation by eIF2B and eIF2B inactivation by eIF2-P. In addition, the mechanism of the action of ISRIB, a small molecule that suppresses ISR, was clarified. We also elucidated the mechanism of ISR suppression by Sandfly fever Sicilian virus NSs protein, which functions by binding to eIF2B.

Free Research Field

構造生物化学

Academic Significance and Societal Importance of the Research Achievements

本研究によりISR制御の核となるeIF2/eIF2-PとeIF2Bによるヌクレオチド交換活性制御の構造的機構が明らかとなった。さらには、これらを参照することによりISRIBやSFSV NSsによるeIF2Bの制御機構を立体構造の視点から明らかにした。今後、eIF2-PとeIF2Bの結合を制御することは神経変性疾患の新規治療法の開発につながると期待できる。

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Published: 2023-01-30  

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