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2021 Fiscal Year Annual Research Report

液-液相分離を介したシナプス恒常的可塑性の新規機構

Research Project

Project/Area Number 21K15188
Research InstitutionKyoto University

Principal Investigator

劉 品吾  京都大学, 医学研究科, 研究員 (60886563)

Project Period (FY) 2021-04-01 – 2022-03-31
Keywordsmemory formation / synaptic plasticity / PSD / CaMKII / LLPS
Outline of Annual Research Achievements

To investigate the molecular mechanism underlying the memory formation, previously I found that a transient calcium signaling in specific synapses during learning forms permanent condensate of a set of synaptic proteins, including GluN2B, a subunit of NMDA receptor, Stargazin, auxiliary subunit of AMPA receptor, PSD-95 and Neuroligin-1 (NLGN1), a neuronal adhesion molecule, via the activation of calcium/calmodulin-dependent protein kinase (CaMKII). Also, I have demonstrated that applying the endogenous inhibitors of CaMKII, Camk2n1/2, to the CaMKII-mediated protein condensates disrupt the phase. Interestingly, when the condensate is newly formed, applying Camk2n1/2 only makes the phase shrink, however, when the condensate has been formed for a while, applying Camk2n1/2 breaks down the entire phase. In addition, while less dendritic spines were observed with Camk2n1/2 overexpressed in dissociated hippocampal cultures, increased and smaller spines were observed with knock-out Camk2n1/2. Taken all together, the different resistance to the Camk2n1/2 and the opposite observation of spine number and morphology might be involved in the mechanism for the turnover of synapses, which needs future experiments to clarify in this intriguing phenomenon.

  • Research Products

    (1 results)

All 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results)

  • [Journal Article] Regulation of the Stability and Localization of Post-synaptic Membrane Proteins by Liquid-Liquid Phase Separation2021

    • Author(s)
      Hosokawa Tomohisa、Liu Pin-Wu
    • Journal Title

      Frontiers in Physiology

      Volume: 12 Pages: 795757

    • DOI

      10.3389/fphys.2021.795757

    • Peer Reviewed / Open Access

URL: 

Published: 2022-12-28  

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