横川　真梨子 （ヨコガワ　マリコ）

YOKOGAWA Mariko

写真a

所属（所属キャンパス）

薬学部 薬科学科 生命機能物理学講座 （芝共立）

職名

専任講師

外部リンク
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学位 【 表示 ／ 非表示 】

  • 博士（薬学）, 東京大学, 課程

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免許・資格 【 表示 ／ 非表示 】

  • 薬剤師免許

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研究分野 【 表示 ／ 非表示 】

  • ライフサイエンス / 薬系分析、物理化学

  • ライフサイエンス / 構造生物化学

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研究キーワード 【 表示 ／ 非表示 】

  • NMR

  • イオンチャネル

  • ウイルス感染症

  • 構造生物学

  • 翻訳因子

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著書 【 表示 ／ 非表示 】

  • Peptide Toxins Targeting KV Channels

    Matsumura K., Yokogawa M., Osawa M., Handbook of Experimental Pharmacology, 2021年

    　概要を見る

    A number of peptide toxins isolated from animals target potassium ion (K+) channels. Many of them are particularly known to inhibit voltage-gated K+ (KV) channels and are mainly classified into pore-blocking toxins or gating-modifier toxins. Pore-blocking toxins directly bind to the ion permeation pores of KV channels, thereby physically occluding them. In contrast, gating-modifier toxins bind to the voltage-sensor domains of KV channels, modulating their voltage-dependent conformational changes. These peptide toxins are useful molecular tools in revealing the structure-function relationship of KV channels and have potential for novel treatments for diseases related to KV channels. This review focuses on the inhibition mechanism of pore-blocking and gating-modifier toxins that target KV channels.

  • Nuclear magnetic resonance approaches for characterizing protein-protein interactions

    Toyama Y., Mase Y., Kano H., Yokogawa M., Osawa M., Shimada I., Methods in Molecular Biology, 2018年

    　概要を見る

    The gating of potassium ion (K+) channels is regulated by various kinds of protein-protein interactions (PPIs). Structural investigations of these PPIs provide useful information not only for understanding the gating mechanisms of K+ channels, but also for developing the pharmaceutical compounds targeting K+ channels. Here, we describe a nuclear magnetic resonance spectroscopic method, termed the cross saturation (CS) method, to accurately determine the binding surfaces of protein complexes, and its application to the investigation of the interaction between a G protein-coupled inwardly rectifying K+ channel and a G protein α subunit.

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論文 【 表示 ／ 非表示 】

  • NMR <sup>1</sup>H, <sup>13</sup>C, <sup>15</sup>N backbone resonance assignments of 14-3-3ζ binding region of human FOXO3a (residues 1-284)

    Enomoto S., Nakatsuka S., Kuwayama T., Kawatsu K., Yokogawa M., Osawa M.

    Biomolecular NMR Assignments 18 （ 2 ） 275 - 283 2024年12月

    研究論文（学術雑誌）, 査読有り,  ISSN  18742718

    　概要を見る

    In tumors, mutation in Ras proteins stimulates a signaling cascade through phosphorylation. Downstream of the cascade, many transcription and translation factors are up- or down-regulated by phosphorylation, leading to cancer progression. This phosphorylation cascade is sustained by 14-3-3ζ protein. 14-3-3ζ binds to its client proteins that are Ser/Thr-phosphorylated and prevents their dephosphorylation. One of those transcription factors is FOXO3a, whose transcriptional activity is suppressed in the phosphorylation cascade. FOXO3a binds to specific DNA sequences and activates the transcription of apoptosis-related proteins. In cancer cells, however, FOXO3a is phosphorylated, bound to 14-3-3ζ, and dissociated from the DNA, resulting in FOXO3a inactivation. To elucidate the mechanism of FOXO3a inactivation by the 14-3-3ζ binding, we aim to perform NMR analysis of the interaction between 14-3-3ζ and di-phosphorylated FOXO3a residues 1-284 (dpFOXO3a). Here, we report the backbone resonance assignments of dpFOXO3a, which are transferred from those of the N-terminal domain (NTD) and the DNA-binding domain (DBD) of dpFOXO3a.

  • Ribonuclease inhibitor and angiogenin system regulates cell type–specific global translation

    Stillinovic M., Sarangdhar M.A., Andina N., Tardivel A., Greub F., Bombaci G., Ansermet C., Zatti M., Saha D., Xiong J., Sagae T., Yokogawa M., Osawa M., Heller M., Keogh A., Keller I., Angelillo-Scherrer A., Allam R.

    Science Advances （Science Advances）  10 （ 22 ） eadl0320 2024年05月

    研究論文（学術雑誌）, 査読有り

    　概要を見る

    Translation of mRNAs is a fundamental process that occurs in all cell types of multicellular organisms. Conventionally, it has been considered a default step in gene expression, lacking specific regulation. However, recent studies have documented that certain mRNAs exhibit cell type–specific translation. Despite this, it remains unclear whether global translation is controlled in a cell type–specific manner. By using human cell lines and mouse models, we found that deletion of the ribosome-associated protein ribonuclease inhibitor 1 (RNH1) decreases global translation selectively in hematopoietic-origin cells but not in the non–hematopoietic-origin cells. RNH1-mediated cell type–specific translation is mechanistically linked to angiogenin-induced ribosomal biogenesis. Collectively, this study unravels the existence of cell type–specific global translation regulators and highlights the complex translation regulation in vertebrates.

  • Applying deep learning to iterative screening of medium-sized molecules for protein-protein interaction-targeted drug discovery

    Shimizu Y., Yonezawa T., Bao Y., Sakamoto J., Yokogawa M., Furuya T., Osawa M., Ikeda K.

    Chemical Communications （Chemical Communications）  59 （ 44 ） 6722 - 6725 2023年05月

    研究論文（学術雑誌）, 査読有り,  ISSN  13597345

    　概要を見る

    We combined a library of medium-sized molecules with iterative screening using multiple machine learning algorithms that were ligand-based, which resulted in a large increase of the hit rate against a protein-protein interaction target. This was demonstrated by inhibition assays using a PPI target, Kelch-like ECH-associated protein 1/nuclear factor erythroid 2-related factor 2 (Keap1/Nrf2), and a deep neural network model based on the first-round assay data showed a highest hit rate of 27.3%. Using the models, we identified novel active and non-flat compounds far from public datasets, expanding the chemical space.

  • TDP-43 N-terminal domain dimerisation or spatial separation by RNA binding decreases its propensity to aggregate

    Miura M., Sakaue F., Matsuno H., Morita K., Yoshida A., Hara R.I., Nishimura R., Nishida Y., Yokogawa M., Osawa M., Yokota T.

    FEBS Letters （FEBS Letters）  597 （ 12 ） 1667 - 1676 2023年

    研究論文（学術雑誌）, 査読有り,  ISSN  00145793

    　概要を見る

    Aggregation of the 43 kDa TAR DNA-binding protein (TDP-43) is a pathological hallmark of amyotrophic lateral sclerosis (ALS) and frontotemporal lobar degeneration (FTLD). RNA binding and TDP-43 N-terminal domain dimerisation has been suggested to ameliorate TDP-43 aggregation. However, the relationship between these factors and the solubility of TDP-43 is largely unknown. Therefore, we developed new oligonucleotides that can recruit two TDP-43 molecules and interfere with their intermolecular interactions via spatial separation. Using these oligonucleotides and TDP-43-preferable UG-repeats, we uncovered two distinct mechanisms for modulating TDP-43 solubility by RNA binding: One is N-terminal domain dimerisation, and the other is the spatial separation of two TDP-43 molecules. This study provides new molecular insights into the regulation of TDP-43 solubility.

  • Paip2A inhibits translation by competitively binding to the RNA recognition motifs of PABPC1 and promoting its dissociation from the poly(A) tail.

    Sagae T, Yokogawa M, Sawazaki R, Ishii Y, Hosoda N, Hoshino SI, Imai S, Shimada I, Osawa M

    The Journal of biological chemistry （Journal of Biological Chemistry）  298 （ 5 ） 101844 2022年03月

    研究論文（学術雑誌）, 査読有り,  ISSN  0021-9258

    　概要を見る

    Eukaryotic mRNAs possess a poly(A) tail at their 30-end, to which poly(A)-binding protein C1 (PABPC1) binds and recruits other proteins that regulate translation. Enhanced poly(A)dependent translation, which is also PABPC1 dependent, promotes cellular and viral proliferation. PABP-interacting protein 2A (Paip2A) effectively represses poly(A)-dependent translation by causing the dissociation of PABPC1 from the poly(A) tail; however, the underlying mechanism remains unknown. This study was conducted to investigate the functional mechanisms of Paip2A action by characterizing the PABPC1–poly(A) and PABPC1–Paip2A interactions. Isothermal titration calorimetry and NMR analyses indicated that both interactions predominantly occurred at the RNA recognition motif (RRM) 2–RRM3 regions of PABPC1, which have comparable affinities for poly(A) and Paip2A (dissociation constant, Kd = 1 nM). However, the Kd values of isolated RRM2 were 200 and 4 μM in their interactions with poly(A) and Paip2A, respectively; Kd values of 5 and 1 μM were observed for the interactions of isolated RRM3 with poly(A) and Paip2A, respectively. NMR analyses also revealed that Paip2A can bind to the poly(A)binding interfaces of the RRM2 and RRM3 regions of PABPC1. Based on these results, we propose the following functional mechanism for Paip2A: Paip2A initially binds to the RRM2 region of poly(A)-bound PABPC1, and RRM2-anchored Paip2A effectively displaces the RRM3 region from poly(A), resulting in dissociation of the whole PABPC1 molecule. Together, our findings provide insight into the translation repression effect of Paip2A and may aid in the development of novel anticancer and/or antiviral drugs.

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総説・解説等 【 表示 ／ 非表示 】

  • Nuclear Magnetic Resonance Approaches for Characterizing Protein-Protein Interactions.

    Toyama Y, Mase Y, Kano H, Yokogawa Mariko, Osawa M, Shimada I

    Methods Mol Biol. 1684   115 - 128 2018年10月

    記事・総説・解説・論説等（学術雑誌）, 共著

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研究発表 【 表示 ／ 非表示 】

  • ポリAとPABPC1の動的相互作用によって制御されるBTG2-Caf1複合体依存的脱アデニル化の構造基盤

    Nao Kataoka, Mariko Yokogawa, Yuichiro Ishii, Erika Shiro, Hiroka Takashima, Ryoichi Sawazaki, Takeru Sagae, Koichi Ogami, Shin-ichi Hoshino, Masanori Osawa

    [国内会議]  第48回日本分子生物学会年会, 

    2025年12月
    , 

    ポスター発表

  • 新型コロナウイルスの侵入を阻害するタンパク質タンパク質相互作用阻害化合物の創製

    横川真梨子, 金一駿希, 堀内まほろ, 大竹帝河, 米澤朋起, 清水祐吾, 池田和由, 山本雄一朗, 酒井祥太, 清水芳実, 野口耕司, 深澤征義, 伊倉光彦, 大澤匡範

    [国内会議]  第64回NMR討論会, 

    2025年11月
    , 

    口頭発表（一般）

  • 14-3-3ζ interacts with DNA-binding domain of FOXO3a and competitively dissociates DNA by dual-motif tethering

    Shota Enomoto, Tomoya Kuwayama, Shoichi Nakatsuka, Mariko Yokogawa, Kosaku Kawatsu, Risa Nakamura, Tomomi Kimura, Mikio Tanabe, Toshiya Senda, Jun Saito, Hideyuki Saya, Masanori Osawa

    [国内会議]  第64回NMR討論会, 

    2025年11月
    , 

    ポスター発表

  • NMR化学シフト変化に基づく低親和性リガンドの結合様式推定手法の構築

    小島行人, 石田英子, 米澤朋起, 原田彩佳, 前川こひろ, 横川真梨子, 清水祐吾, 池田和由, 大澤匡範

    [国内会議]  第64回NMR討論会, 

    2025年11月
    , 

    ポスター発表

  • ALS関連タンパク質TDP-43の凝集と核酸による抑制機構の解明

    西村 錬, 西田 優理華, 八城 立樹, 坂上 史佳, 三浦 元輝, 横田 隆徳, 石田 英子, 横川 真梨子, 大澤 匡範

    [国内会議]  第64回NMR討論会, 

    2025年11月
    , 

    ポスター発表

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競争的研究費の研究課題 【 表示 ／ 非表示 】

  • B型肝炎ウイルスの肝細胞侵入・増殖機構の構造基盤と立体構造に基づく創薬

    2021年04月
    -
    2024年03月

    文部科学省・日本学術振興会, 科学研究費助成事業, 横川 真梨子, 基盤研究(C), 補助金,  研究代表者

  • B型肝炎ウイルスの肝細胞侵入および増殖機構の構造生物学的解析

    2018年04月
    -
    2021年03月

    文部科学省・日本学術振興会, 科学研究費助成事業, 横川　真梨子, 基盤研究(C), 補助金,  研究代表者

  • B型肝炎ウイルスの感染機構の構造基盤

    2016年04月
    -
    2018年03月

    文部科学省・日本学術振興会, 科学研究費助成事業, 横川　真梨子, 若手研究(B), 補助金,  研究代表者

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担当授業科目 【 表示 ／ 非表示 】

  • 課題研究（生命機能物理学）（春）

    2025年度

  • 課題研究（生命機能物理学）（秋）

    2025年度

  • 課題研究（生命機能物理学）

    2025年度

  • 演習（生命機能物理学）（春）

    2025年度

  • 演習（生命機能物理学）（秋）

    2025年度

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担当経験のある授業科目 【 表示 ／ 非表示 】

  • 薬学基礎実習

    慶應義塾

    2015年04月
    -
    2016年03月
    , 

    秋学期, 実習・実験

  • C1(4)物質の変化

    慶應義塾

    2015年04月
    -
    2016年03月
    , 

    秋学期, 講義

    反応速度

  • 薬学実習IIA（化学、物理）

    慶應義塾

    2015年04月
    -
    2016年03月
    , 

    春学期, 実習・実験

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