研究者詳細

顔写真

カワカミ コウキ
川上 耕季
Kouki Kawakami
所属
大学院薬学研究科 生命薬科学専攻 生命解析学講座(分子細胞生化学分野)
職名
准教授
学位
  • 博士 (薬科学) (東北大学)

e-Rad 研究者番号
30908421

経歴 8

  • 2026年4月 ~ 継続中
    東北大学 大学院薬学研究科 准教授

  • 2026年4月 ~ 継続中
    東京大学 先端科学技術研究センター 特任准教授

  • 2024年2月 ~ 2026年3月
    東京大学 先端科学技術研究センター 東京大学特別研究員

  • 2023年4月 ~ 2026年3月
    独立行政法人日本学術振興会 特別研究員(PD)

  • 2023年4月 ~ 2024年1月
    東京大学 大学院総合文化研究科 東京大学特別研究員

  • 2022年4月 ~ 2023年3月
    東北大学 大学院薬学研究科 助教

  • 2021年4月 ~ 2022年3月
    東北大学 大学院薬学研究科 学術研究員

  • 2019年4月 ~ 2021年3月
    独立行政法人日本学術振興会 特別研究員(DC2)

︎全件表示 ︎最初の5件までを表示

学歴 3

  • 東北大学 大学院薬学研究科 生命薬科学専攻

    2018年4月 ~ 2021年3月

  • 東北大学 大学院薬学研究科 生命薬科学専攻

    2016年4月 ~ 2018年3月

  • 東北大学 薬学部 創薬科学科

    2012年4月 ~ 2016年3月

所属学協会 2

  • 日本薬学会

  • 日本生化学会

研究キーワード 1

  • Gタンパク質共役型受容体(GPCR)

研究分野 3

  • ライフサイエンス / 構造生物化学 /

  • ライフサイエンス / 薬系衛生、生物化学 /

  • ライフサイエンス / 薬理学 /

受賞 6

  1. 井上研究奨励賞

    2023年12月 井上科学振興財団

  2. 日本生化学会東北支部優秀論文賞

    2022年5月 日本生化学会東北支部

  3. 若手優秀発表賞

    2021年11月 第94回日本生化学会大会

  4. 若手優秀発表賞

    2019年9月 第92回日本生化学会大会

  5. 松尾研究奨励賞

    2018年7月 International GPCR symposium

  6. 優秀発表賞

    2017年9月 第16回次世代を担う若手ファーマ・バイオフォーラム 2017

︎全件表示 ︎最初の5件までを表示

論文 43

  1. Universal pipeline for high-resolution GPCR structure determination. 国際誌 査読有り

    Asato Kojima, Kouki Kawakami, Naoya Kobayashi, Kazuhiro Kobayashi, Toshiki E Matsui, Kohei Uemoto, Yuzhong Gu, Tomohiro J Narita, Mai Kugawa, Masahiro Fukuda, Hideaki E Kato

    Nature structural & molecular biology 2026年8月28日

    DOI: 10.1038/s41594-026-01869-6  

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    G protein-coupled receptors (GPCRs) regulate human physiology and are major drug targets. Although cryo-electron microscopy has accelerated GPCR structural biology, inactive-state structures remain difficult because current fusion-based strategies often require extensive experimental screening to identify rigid constructs suitable for high-resolution reconstruction. Here we introduce a universal pipeline that integrates an in silico fusion construct screening program, NOAH (nonexperimental, artificial-intelligence-assisted, high-throughput construct screening for structural analysis), with a de novo designed fusion protein, ARK1 (artificially designed fiducial marker). NOAH enabled structure determination of vasopressin V2 receptor bound to the antagonist tolvaptan or partial agonist OPC51803 and bradykinin B2 receptor bound to the antagonist icatibant, revealing receptor activation and inhibition mechanisms. Coupling NOAH to ARK1 improved the V2 receptor-tolvaptan map and enabled high-resolution structures of lysophosphatidic acid receptor 2 bound to Ki16425 and free fatty acid receptor 2 bound to GLPG0974. NOAH-ARK1 minimizes trial-and-error construct optimization and provides a broadly applicable route for GPCR structural analysis and drug discovery.

  2. The dynamic basis of G-protein recognition and activation by a GPCR. 国際誌 査読有り

    Kazuhiro Kobayashi, Kouki Kawakami, Toshiki E Matsui, Shun Yokoi, Masahiro Fukuda, Tomohiro J Narita, Hiroki Arai, Mai Tambo, Takashi Sumikama, Manae Tatsumi, Keitaro Yamashita, Junki Koyanagi, Mai Kugawa, Hisako Ikeda, Ayumi Sumino, Ayori Mitsutake, Brian K Kobilka, Asuka Inoue, Hideaki E Kato

    Nature 2026年3月11日

    DOI: 10.1038/s41586-026-10228-w  

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    G-protein-coupled receptor (GPCR) signalling occurs through heterotrimeric G proteins, whose selective activation leads to distinct cellular outcomes1. Although more than 200 GPCR-G protein complex structures have been determined2, these static snapshots provide limited insight into the dynamics of G-protein association and dissociation. Here we present cryo-electron microscopy structures of human neurotensin receptor type 1 (NTSR1) with minimally modified Go and Gq, showing how the receptor's intracellular surface dynamically rearranges to accommodate each G-protein subtype. Furthermore, time-resolved cryo-electron microscopy analyses of NTSR1-Gi visualized G-protein dissociation processes on GDP/GTP binding. Characterization of more than 20 intermediates, complemented by mutational and computational analyses, identifies four key mechanistic features. First, GDP/GTP induces Gi release from both canonical and non-canonical active conformations with distinct kinetics. Second, NTSR1 uses common intracellular rearrangements to recognize different G-protein subtypes and to promote activation of a single subtype. Third, separation from Gβγ involves stepwise remodelling of the Gα switches I-III. Finally, Gi dissociates from the receptor through a pathway that is distinct from that of Gs, and the canonical and non-canonical NTSR1-Gi complexes further diverge in their dissociation trajectories. These findings provide a comprehensive framework for understanding GPCR signalling dynamics and guiding signal-targeted therapeutic development.

  3. Structural insights into lipid chain-length selectivity and allosteric regulation of FFA2. 国際誌 査読有り

    Mai Kugawa, Kouki Kawakami, Ryoji Kise, Carl-Mikael Suomivuori, Masaki Tsujimura, Kazuhiro Kobayashi, Asato Kojima, Wakana J Inoue, Masahiro Fukuda, Toshiki E Matsui, Ayami Fukunaga, Junki Koyanagi, Suhyang Kim, Hisako Ikeda, Keitaro Yamashita, Keisuke Saito, Hiroshi Ishikita, Ron O Dror, Asuka Inoue, Hideaki E Kato

    Nature communications 16 (1) 2809-2809 2025年3月26日

    DOI: 10.1038/s41467-025-57983-4  

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    The free fatty acid receptor 2 (FFA2) is a G protein-coupled receptor (GPCR) that selectively recognizes short-chain fatty acids to regulate metabolic and immune functions. As a promising therapeutic target, FFA2 has been the focus of intensive development of synthetic ligands. However, the mechanisms by which endogenous and synthetic ligands modulate FFA2 activity remain unclear. Here, we present the structures of the human FFA2-Gi complex activated by the synthetic orthosteric agonist TUG-1375 and the positive allosteric modulator/allosteric agonist 4-CMTB, along with the structure of the inactive FFA2 bound to the antagonist GLPG0974. Structural comparisons with FFA1 and mutational studies reveal how FFA2 selects specific fatty acid chain lengths. Moreover, our structures reveal that GLPG0974 functions as an allosteric antagonist by binding adjacent to the orthosteric pocket to block agonist binding, whereas 4-CMTB binds the outer surface of transmembrane helices 6 and 7 to directly activate the receptor. Supported by computational and functional studies, these insights illuminate diverse mechanisms of ligand action, paving the way for precise GPCR-targeted drug design.

  4. Structural basis for ligand recognition and signaling of hydroxy-carboxylic acid receptor 2. 国際誌 査読有り

    Jae-Hyun Park, Kouki Kawakami, Naito Ishimoto, Tatsuya Ikuta, Mio Ohki, Toru Ekimoto, Mitsunori Ikeguchi, Dong-Sun Lee, Young-Ho Lee, Jeremy R H Tame, Asuka Inoue, Sam-Yong Park

    Nature communications 14 (1) 7150-7150 2023年11月6日

    DOI: 10.1038/s41467-023-42764-8  

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    Hydroxycarboxylic acid receptors (HCAR1, HCAR2, and HCAR3) transduce Gi/o signaling upon biding to molecules such as lactic acid, butyric acid and 3-hydroxyoctanoic acid, which are associated with lipolytic and atherogenic activity, and neuroinflammation. Although many reports have elucidated the function of HCAR2 and its potential as a therapeutic target for treating not only dyslipidemia but also neuroimmune disorders such as multiple sclerosis and Parkinson's disease, the structural basis of ligand recognition and ligand-induced Gi-coupling remains unclear. Here we report three cryo-EM structures of the human HCAR2-Gi signaling complex, each bound with different ligands: niacin, acipimox or GSK256073. All three agonists are held in a deep pocket lined by residues that are not conserved in HCAR1 and HCAR3. A distinct hairpin loop at the HCAR2 N-terminus and extra-cellular loop 2 (ECL2) completely enclose the ligand. These structures also reveal the agonist-induced conformational changes propagated to the G-protein-coupling interface during activation. Collectively, the structures presented here are expected to help in the design of ligands specific for HCAR2, leading to new drugs for the treatment of various diseases such as dyslipidemia and inflammation.

  5. Class B1 GPCR activation by an intracellular agonist. 国際誌 査読有り

    Kazuhiro Kobayashi, Kouki Kawakami, Tsukasa Kusakizako, Atsuhiro Tomita, Michihiro Nishimura, Kazuhiro Sawada, Hiroyuki H Okamoto, Suzune Hiratsuka, Gaku Nakamura, Riku Kuwabara, Hiroshi Noda, Hiroyasu Muramatsu, Masaru Shimizu, Tomohiko Taguchi, Asuka Inoue, Takeshi Murata, Osamu Nureki

    Nature 618 (7967) 1085-1093 2023年6月7日

    DOI: 10.1038/s41586-023-06169-3  

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    G protein-coupled receptors (GPCRs) generally accommodate specific ligands in the orthosteric-binding pockets. Ligand binding triggers a receptor allosteric conformational change that leads to the activation of intracellular transducers, G proteins and β-arrestins. Because these signals often induce adverse effects, the selective activation mechanism for each transducer must be elucidated. Thus, many orthosteric-biased agonists have been developed, and intracellular-biased agonists have recently attracted broad interest. These agonists bind within the receptor intracellular cavity and preferentially tune the specific signalling pathway over other signalling pathways, without allosteric rearrangement of the receptor from the extracellular side1-3. However, only antagonist-bound structures are currently available1,4-6, and there is no evidence to support that biased agonist binding occurs within the intracellular cavity. This limits the comprehension of intracellular-biased agonism and potential drug development. Here we report the cryogenic electron microscopy structure of a complex of Gs and the human parathyroid hormone type 1 receptor (PTH1R) bound to a PTH1R agonist, PCO371. PCO371 binds within an intracellular pocket of PTH1R and directly interacts with Gs. The PCO371-binding mode rearranges the intracellular region towards the active conformation without extracellularly induced allosteric signal propagation. PCO371 stabilizes the significantly outward-bent conformation of transmembrane helix 6, which facilitates binding to G proteins rather than β-arrestins. Furthermore, PCO371 binds within the highly conserved intracellular pocket, activating 7 out of the 15 class B1 GPCRs. Our study identifies a new and conserved intracellular agonist-binding pocket and provides evidence of a biased signalling mechanism that targets the receptor-transducer interface.

  6. Heterotrimeric Gq proteins act as a switch for GRK5/6 selectivity underlying β-arrestin transducer bias 国際誌 査読有り

    Kouki Kawakami, Masataka Yanagawa, Suzune Hiratsuka, Misaki Yoshida, Yuki Ono, Michio Hiroshima, Masahiro Ueda, Junken Aoki, Yasushi Sako, Asuka Inoue

    Nature Communications 13 (1) 487-487 2022年12月

    DOI: 10.1038/s41467-022-28056-7  

    eISSN:2041-1723

  7. A Rapid and Universal Pipeline for High-Resolution GPCR Structure Determination through In Silico Construct Optimization and de novo Protein Design

    Asato Kojima, Kouki Kawakami, Naoya Kobayashi, Kazuhiro Kobayashi, Toshiki E. Matsui, Kohei Uemoto, Yuzhong Gu, Masahiro Fukuda, Hideaki E. Kato

    2026年4月6日

    出版者・発行元: openRxiv

    DOI: 10.64898/2026.04.02.716066  

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    Abstract G protein-coupled receptors (GPCRs) are critical regulators of human physiology and major drug targets. Although structural studies have provided valuable insights, determining GPCR structures remains challenging, especially for inactive state receptors. Recent advances in cryo-electron microscopy (cryo-EM) have enabled structural determination of small GPCRs by using fusion partner proteins and binders to increase molecular weight. However, current methods require extensive experimental screening of fusion constructs. Widely adopted strategies, such as BRIL-Fab complexes, also face limitations due to inherent flexibility. Here, we introduce a streamlined and universal pipeline that integrates an in silico fusion construct screening program, NOAH (NOAH: NOn-experimental, AI-assisted High-throughput construct screening), with a de novo designed fusion protein called ARK1 (ARtificially-designed fiducial marKer). We validate the efficacy of NOAH by determining the structures of the vasopressin V2 receptor (V2R) bound to the clinical antagonist tolvaptan and the partial agonist OPC51803, as well as the bradykinin B2 receptor (B2R) bound to the clinical antagonist icatibant, thereby elucidating their activation and deactivation mechanisms. Furthermore, we demonstrate the capability of NOAH-ARK1 by solving the tolvaptan-bound V2R structure at higher resolution and showcase the method’s versatility by determining the structure of lysophosphatidic acid receptor 2 (LPA2) bound to the antagonist Ki16425. This approach eliminates the need for time-consuming and labor-intensive construct optimization, providing a rapid and widely applicable solution for high-resolution GPCR structure determination and drug discovery.

  8. Membrane-domain compartmentalization of active GPCRs by β-arrestins through PtdIns(4,5)P2 binding. 国際誌 査読有り

    Ritsuki Kuramoto, Tatsuya Ikuta, Carlo Marion C Carino, Kouki Kawakami, Miisha Kushiro, Chihiro Watanabe, Yasunori Uchida, Mitsuhiro Abe, Yasushi Sako, Tomohiko Taguchi, Masataka Yanagawa, Asuka Inoue

    Nature chemical biology 2025年8月6日

    DOI: 10.1038/s41589-025-01967-4  

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    Upon ligand-induced activation, G-protein-coupled receptors (GPCRs) recruit β-arrestins (βarrs) to the plasma membrane, where phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2) stabilizes the GPCR-βarr complex. Although PtdIns(4,5)P2 is reported to form nanoscale clusters, the spatiotemporal dynamics of how the GPCR-βarr-PtdIns(4,5)P2 complex assembles and organizes in living cells remain unexplored. Here we demonstrate that multiple PtdIns(4,5)P2-binding sites on βarrs cooperatively promote GPCR-βarr assembly in membrane domains. Using molecular dynamics simulations, we identify a noncanonical (NC) PtdIns(4,5)P2-binding site, distinct from the known canonical site. Biochemical assays confirm that both sites are essential for βarr binding to PtdIns(4,5)P2-containing liposomes, while NanoBiT assays reveal synergistic contributions of both sites for βarr recruitment in living cells. Notably, single-molecule imaging demonstrates that the NC site is required for the rapid accumulation of the GPCR-βarr-PtdIns(4,5)P2 complex into immobile membrane domains upon ligand stimulation. Collectively, our findings highlight how multivalent βarr-PtdIns(4,5)P2 interactions drive GPCR-βarr compartmentalization, adding complexity to GPCR signaling dynamics.

  9. Insights into G-protein coupling preference from cryo-EM structures of Gq-bound PTH1R. 国際誌 査読有り

    Fumiya K Sano, Kota Shimizume, Kazuhiro Kobayashi, Toshikuni Awazu, Kouki Kawakami, Hiroaki Akasaka, Takaaki A Kobayashi, Tatsuki Tanaka, Hiroyuki H Okamoto, Hisato Hirano, Tsukasa Kusakizako, Wataru Shihoya, Yoshiaki Kise, Yuzuru Itoh, Ryuichiro Ishitani, Yasushi Okada, Yasushi Sako, Masataka Yanagawa, Asuka Inoue, Osamu Nureki

    Nature chemical biology 2025年6月26日

    DOI: 10.1038/s41589-025-01957-6  

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    The parathyroid hormone type 1 receptor (PTH1R) is a prototypical class B1 G-protein-coupled receptor that couples to both Gq and Gs, having a crucial role in calcium homeostasis and serving as a therapeutic target for osteoporosis. Therapies targeting PTH1R face challenges because of Gq-associated prolonged signaling, which leads to bone resorption. To address this, selective activation of Gs signaling is desirable. However, the structural basis of Gq-mediated signaling remains unclear, limiting the development of signal-selective drugs. Here, we present cryo-electron microscopy structures of the PTH1R-Gq complex in two distinct extracellular conformations, demonstrating the role of N-linked glycans at N1761.28 in stabilizing the ligand-tilted conformation. Comparison with a Gs-bound PTH1R structure highlights the role of key interactions involving both the C terminus of Gα and the receptor's intracellular loop 2 in Gq signaling. These structural insights provide a foundation for understanding the molecular mechanisms of PTH1R signaling.

  10. A molecular mechanism to diversify Ca2+ signaling downstream of Gs protein-coupled receptors 査読有り

    Julian Brands, Sergi Bravo, Lars Jürgenliemke, Lukas Grätz, Hannes Schihada, Fabian Frechen, Judith Alenfelder, Cy Pfeil, Paul Georg Ohse, Suzune Hiratsuka, Kouki Kawakami, Luna C. Schmacke, Nina Heycke, Asuka Inoue, Gabriele König, Alexander Pfeifer, Dagmar Wachten, Gunnar Schulte, Torsten Steinmetzer, Val J. Watts, Jesús Gomeza, Katharina Simon, Evi Kostenis

    Nature Communications 15 (1) 2024年12月

    DOI: 10.1038/s41467-024-51991-6  

    eISSN:2041-1723

  11. Signal profiles and spatial regulation of β-arrestin recruitment through Gβ5 and GRK3 at the μ-opioid receptor. 国際誌

    Carlo Marion C Carino, Suzune Hiratsuka, Ryoji Kise, Gaku Nakamura, Kouki Kawakami, Masataka Yanagawa, Asuka Inoue

    European journal of pharmacology 177151-177151 2024年11月21日

    DOI: 10.1016/j.ejphar.2024.177151  

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    The μ-opioid receptor (MOR) is a G-protein-coupled receptor (GPCR) that mediates both analgesic effects and adverse effects of opioid drugs. Despite extensive efforts to develop a signal-biased drug, drugs with sufficiently reduced side effects have not been established, in part owing to lack of comprehensive signal transducer profiles of MOR. In this study, by profiling the activity of signal transducers including G proteins and GPCR kinases (GRKs), we revealed an unprecedented mechanism of selective GRK3 activation by Gβ5, leading to β-arrestin recruitment. By utilizing multiple genome-edited cell lines and functional assays, we found that oliceridine, an FDA-approved G-protein-biased agonist, selectively activates Gαz- and GRK3-mediated signaling. Notably, among the five Gβ subtypes, only Gβ5 distinguishes GRK3 from GRK2. Using single-molecule imaging, we found that GRK3 is recruited to the plasma membrane upon MOR agonist stimulation by Gβ1 and Gβ5, yet their interaction dynamics with GRK3 and mechanisms of action are different. Furthermore, particle diffusion analysis suggests that Gβ5 is enriched in confined membrane domains, through which GRK3 is recruited to the plasma membrane in a freely diffusible state, thereby allowing GRK3 to efficiently interact with MOR. These findings provide a mechanism by which MOR agonists rely on a specific Gα-Gβ-GRK axis to induce β-arrestin recruitment.

  12. A cAMP-biosensor-based assay for measuring plasma arginine-vasopressin levels. 国際誌 査読有り

    Kosuke Doi, Kouki Kawakami, Tatsuya Ikuta, Asuka Inoue

    Scientific reports 14 (1) 9453-9453 2024年4月24日

    DOI: 10.1038/s41598-024-60035-4  

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    Arginine-vasopressin (AVP), a cyclic peptide hormone composed of nine amino acids, regulates water reabsorption by increasing intracellular cyclic adenosine monophosphate (cAMP) concentrations via the vasopressin V2 receptor (V2R). Plasma AVP is a valuable biomarker for the diagnosis of central diabetes insipidus (CDI) and is commonly measured using radioimmunoassay (RIA). However, RIA has several drawbacks, including a long hands-on time, complex procedures, and handling of radioisotopes with special equipment and facilities. In this study, we developed a bioassay to measure plasma AVP levels using HEK293 cells expressing an engineered V2R and a cAMP biosensor. To achieve high sensitivity, we screened V2R orthologs from 11 various mammalian species and found that the platypus V2R (pV2R) responded to AVP with approximately six-fold higher sensitivity than that observed by the human V2R. Furthermore, to reduce cross-reactivity with desmopressin (DDAVP), a V2R agonist used for CDI treatment, we introduced a previously described point mutation into pV2R, yielding an approximately 20-fold reduction of responsiveness to DDAVP while maintaining responsiveness to AVP. Finally, a comparison of plasma samples from 12 healthy individuals demonstrated a strong correlation (Pearson's correlation value: 0.90) between our bioassay and RIA. Overall, our assay offers a more rapid and convenient method for quantifying plasma AVP concentrations than existing techniques.

  13. Mechanisms of biased agonism by Gαi/o-biased stapled peptide agonists of the relaxin-3 receptor. 国際誌 査読有り

    Tharindunee Jayakody, Asuka Inoue, Srinivasaraghavan Kannan, Gaku Nakamura, Kouki Kawakami, Krishan Mendis, Thanh-Binh Nguyen, Jianguo Li, Deron R Herr, Chandra S Verma, Gavin S Dawe

    Science signaling 17 (823) eabl5880 2024年2月13日

    DOI: 10.1126/scisignal.abl5880  

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    The neuropeptide relaxin-3 is composed of an A chain and a B chain held together by disulfide bonds, and it modulates functions such as anxiety and food intake by binding to and activating its cognate receptor RXFP3, mainly through the B chain. Biased ligands of RXFP3 would help to determine the molecular mechanisms underlying the activation of G proteins and β-arrestins downstream of RXFP3 that lead to such diverse functions. We showed that the i, i+4 stapled relaxin-3 B chains, 14s18 and d(1-7)14s18, were Gαi/o-biased agonists of RXFP3. These peptides did not induce recruitment of β-arrestin1/2 to RXFP3 by GPCR kinases (GRKs), in contrast to relaxin-3, which enabled the GRK2/3-mediated recruitment of β-arrestin1/2 to RXFP3. Relaxin-3 and the previously reported peptide 4 (an i, i+4 stapled relaxin-3 B chain) did not exhibit biased signaling. The staple linker of peptide 4 and parts of both the A chain and B chain of relaxin-3 interacted with extracellular loop 3 (ECL3) of RXFP3, moving it away from the binding pocket, suggesting that unbiased ligands promote a more open conformation of RXFP3. These findings highlight roles for the A chain and the N-terminal residues of the B chain of relaxin-3 in inducing conformational changes in RXFP3, which will help in designing selective biased ligands with improved therapeutic efficacy.

  14. Therapeutic potentials of nonpeptidic V2R agonists for partial cNDI-causing V2R mutants. 国際誌 査読有り

    Ritsuki Kuramoto, Ryoji Kise, Mayu Kanno, Kouki Kawakami, Tatsuya Ikuta, Noriko Makita, Asuka Inoue

    PloS one 19 (5) e0303507 2024年

    DOI: 10.1371/journal.pone.0303507  

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    Loss-of-function mutations in the type 2 vasopressin receptor (V2R) are a major cause of congenital nephrogenic diabetes insipidus (cNDI). In the context of partial cNDI, the response to desmopressin (dDAVP) is partially, but not entirely, diminished. For those with the partial cNDI, restoration of V2R function would offer a prospective therapeutic approach. In this study, we revealed that OPC-51803 (OPC5) and its structurally related V2R agonists could functionally restore V2R mutants causing partial cNDI by inducing prolonged signal activation. The OPC5-related agonists exhibited functional selectivity by inducing signaling through the Gs-cAMP pathway while not recruiting β-arrestin1/2. We found that six cNDI-related V2R partial mutants (V882.53M, Y1283.41S, L1614.47P, T2736.37M, S3298.47R and S3338.51del) displayed varying degrees of plasma membrane expression levels and exhibited moderately impaired signaling function. Several OPC5-related agonists induced higher cAMP responses than AVP at V2R mutants after prolonged agonist stimulation, suggesting their potential effectiveness in compensating impaired V2R-mediated function. Furthermore, docking analysis revealed that the differential interaction of agonists with L3127.40 caused altered coordination of TM7, potentially contributing to the functional selectivity of signaling. These findings suggest that nonpeptide V2R agonists could hold promise as potential drug candidates for addressing partial cNDI.

  15. Molecular insights into intrinsic transducer-coupling bias in the CXCR4-CXCR7 system. 国際誌 査読有り

    Parishmita Sarma, Carlo Marion C Carino, Deeksha Seetharama, Shubhi Pandey, Hemlata Dwivedi-Agnihotri, Xue Rui, Yubo Cao, Kouki Kawakami, Poonam Kumari, Yu-Chih Chen, Kathryn E Luker, Prem N Yadav, Gary D Luker, Stéphane A Laporte, Xin Chen, Asuka Inoue, Arun K Shukla

    Nature communications 14 (1) 4808-4808 2023年8月9日

    DOI: 10.1038/s41467-023-40482-9  

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    Chemokine receptors constitute an important subfamily of G protein-coupled receptors (GPCRs), and they are critically involved in a broad range of immune response mechanisms. Ligand promiscuity among these receptors makes them an interesting target to explore multiple aspects of biased agonism. Here, we comprehensively characterize two chemokine receptors namely, CXCR4 and CXCR7, in terms of their transducer-coupling and downstream signaling upon their stimulation by a common chemokine agonist, CXCL12, and a small molecule agonist, VUF11207. We observe that CXCR7 lacks G-protein-coupling while maintaining robust βarr recruitment with a major contribution of GRK5/6. On the other hand, CXCR4 displays robust G-protein activation as expected but exhibits significantly reduced βarr-coupling compared to CXCR7. These two receptors induce distinct βarr conformations even when activated by the same agonist, and CXCR7, unlike CXCR4, fails to activate ERK1/2 MAP kinase. We also identify a key contribution of a single phosphorylation site in CXCR7 for βarr recruitment and endosomal localization. Our study provides molecular insights into intrinsic-bias encoded in the CXCR4-CXCR7 system with broad implications for drug discovery.

  16. Structural basis of CXC chemokine receptor 1 ligand binding and activation. 国際誌 査読有り

    Naito Ishimoto, Jae-Hyun Park, Kouki Kawakami, Michiko Tajiri, Kenji Mizutani, Satoko Akashi, Jeremy R H Tame, Asuka Inoue, Sam-Yong Park

    Nature communications 14 (1) 4107-4107 2023年7月11日

    DOI: 10.1038/s41467-023-39799-2  

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    Neutrophil granulocytes play key roles in innate immunity and shaping adaptive immune responses. They are attracted by chemokines to sites of infection and tissue damage, where they kill and phagocytose bacteria. The chemokine CXCL8 (also known as interleukin-8, abbreviated IL-8) and its G-protein-coupled receptors CXCR1 and CXCR2 are crucial elements in this process, and also the development of many cancers. These GPCRs have therefore been the target of many drug development campaigns and structural studies. Here, we solve the structure of CXCR1 complexed with CXCL8 and cognate G-proteins using cryo-EM, showing the detailed interactions between the receptor, the chemokine and Gαi protein. Unlike the closely related CXCR2, CXCR1 strongly prefers to bind CXCL8 in its monomeric form. The model shows that steric clashes would form between dimeric CXCL8 and extracellular loop 2 (ECL2) of CXCR1. Consistently, transplanting ECL2 of CXCR2 onto CXCR1 abolishes the selectivity for the monomeric chemokine. Our model and functional analysis of various CXCR1 mutants will assist efforts in structure-based drug design targeting specific CXC chemokine receptor subtypes.

  17. Function and dynamics of the intrinsically disordered carboxyl terminus of β2 adrenergic receptor. 国際誌 査読有り

    Jie Heng, Yunfei Hu, Guillermo Pérez-Hernández, Asuka Inoue, Jiawei Zhao, Xiuyan Ma, Xiaoou Sun, Kouki Kawakami, Tatsuya Ikuta, Jienv Ding, Yujie Yang, Lujia Zhang, Sijia Peng, Xiaogang Niu, Hongwei Li, Ramon Guixà-González, Changwen Jin, Peter W Hildebrand, Chunlai Chen, Brian K Kobilka

    Nature communications 14 (1) 2005-2005 2023年4月10日

    DOI: 10.1038/s41467-023-37233-1  

    詳細を見る 詳細を閉じる

    Advances in structural biology have provided important mechanistic insights into signaling by the transmembrane core of G-protein coupled receptors (GPCRs); however, much less is known about intrinsically disordered regions such as the carboxyl terminus (CT), which is highly flexible and not visible in GPCR structures. The β2 adrenergic receptor's (β2AR) 71 amino acid CT is a substrate for GPCR kinases and binds β-arrestins to regulate signaling. Here we show that the β2AR CT directly inhibits basal and agonist-stimulated signaling in cell lines lacking β-arrestins. Combining single-molecule fluorescence resonance energy transfer (FRET), NMR spectroscopy, and molecular dynamics simulations, we reveal that the negatively charged β2AR-CT serves as an autoinhibitory factor via interacting with the positively charged cytoplasmic surface of the receptor to limit access to G-proteins. The stability of this interaction is influenced by agonists and allosteric modulators, emphasizing that the CT plays important role in allosterically regulating GPCR activation.

  18. Phosphorylation barcodes direct biased chemokine signaling at CXCR3. 国際誌 査読有り

    Dylan S Eiger, Jeffrey S Smith, Tujin Shi, Tomasz Maciej Stepniewski, Chia-Feng Tsai, Christopher Honeycutt, Noelia Boldizsar, Julia Gardner, Carrie D Nicora, Ahmed M Moghieb, Kouki Kawakami, Issac Choi, Chloe Hicks, Kevin Zheng, Anmol Warman, Priya Alagesan, Nicole M Knape, Ouwen Huang, Justin D Silverman, Richard D Smith, Asuka Inoue, Jana Selent, Jon M Jacobs, Sudarshan Rajagopal

    Cell chemical biology 30 (4) 362-382 2023年4月3日

    DOI: 10.1016/j.chembiol.2023.03.006  

    詳細を見る 詳細を閉じる

    G protein-coupled receptor (GPCR)-biased agonism, selective activation of certain signaling pathways relative to others, is thought to be directed by differential GPCR phosphorylation "barcodes." At chemokine receptors, endogenous chemokines can act as "biased agonists", which may contribute to the limited success when pharmacologically targeting these receptors. Here, mass spectrometry-based global phosphoproteomics revealed that CXCR3 chemokines generate different phosphorylation barcodes associated with differential transducer activation. Chemokine stimulation resulted in distinct changes throughout the kinome in global phosphoproteomics studies. Mutation of CXCR3 phosphosites altered β-arrestin 2 conformation in cellular assays and was consistent with conformational changes observed in molecular dynamics simulations. T cells expressing phosphorylation-deficient CXCR3 mutants resulted in agonist- and receptor-specific chemotactic profiles. Our results demonstrate that CXCR3 chemokines are non-redundant and act as biased agonists through differential encoding of phosphorylation barcodes, leading to distinct physiological processes.

  19. Structural basis of lysophosphatidylserine receptor GPR174 ligand recognition and activation. 国際誌 査読有り

    Jiale Liang, Asuka Inoue, Tatsuya Ikuta, Ruixue Xia, Na Wang, Kouki Kawakami, Zhenmei Xu, Yu Qian, Xinyan Zhu, Anqi Zhang, Changyou Guo, Zhiwei Huang, Yuanzheng He

    Nature communications 14 (1) 1012-1012 2023年2月23日

    DOI: 10.1038/s41467-023-36575-0  

    詳細を見る 詳細を閉じる

    Lysophosphatidylserine (LysoPS) is a lipid mediator that induces multiple cellular responses through binding to GPR174. Here, we present the cryo-electron microscopy (cryo-EM) structure of LysoPS-bound human GPR174 in complex with Gs protein. The structure reveals a ligand recognition mode, including the negatively charged head group of LysoPS forms extensive polar interactions with surrounding key residues of the ligand binding pocket, and the L-serine moiety buries deeply into a positive charged cavity in the pocket. In addition, the structure unveils a partially open pocket on transmembrane domain helix (TM) 4 and 5 for a lateral entry of ligand. Finally, the structure reveals a Gs engaging mode featured by a deep insertion of a helix 5 (αH5) and extensive polar interactions between receptor and αH5. Taken together, the information revealed by our structural study provides a framework for understanding LysoPS signaling and a rational basis for designing LysoPS receptor-targeting drugs.

  20. Generation of Gαi knock-out HEK293 cells illuminates Gαi-coupling diversity of GPCRs. 国際誌 査読有り

    Yuki Ono, Kouki Kawakami, Gaku Nakamura, Satoru Ishida, Junken Aoki, Asuka Inoue

    Communications biology 6 (1) 112-112 2023年1月28日

    DOI: 10.1038/s42003-023-04465-2  

    詳細を見る 詳細を閉じる

    G-protein-coupled receptors (GPCRs) are pivotal cell membrane proteins that sense extracellular molecules and activate cellular responses. The G-protein α subunit i (Gαi) family represents the most common GPCR-coupling partner and consists of eight subunits with distinct signaling properties. However, analyzing the coupling pattern has been challenging owing to endogenous expression of the Gαi subunits in virtually all cell lines. Here, we generate a HEK293 cell line lacking all Gαi subunits, which enables the measurement of GPCR-Gαi coupling upon transient re-expression of a specific Gαi subunit. We profile Gαi-coupling selectivity across 11 GPCRs by measuring ligand-induced inhibitory activity for cAMP accumulation. The coupling profiles are then classified into three clusters, representing those preferentially coupled to Gαz, those to Gαo, and those with unapparent selectivity. These results indicate that individual Gαi-coupled GPCRs fine-tune Gαi signaling by exerting coupling preference at the Gαi-subunit level.

  21. Ectodomain shedding of EGFR ligands serves as an activation readout for TRP channels. 国際誌 査読有り

    Manae Tatsumi, Takayuki Kishi, Satoru Ishida, Hiroki Kawana, Akiharu Uwamizu, Yuki Ono, Kouki Kawakami, Junken Aoki, Asuka Inoue

    PloS one 18 (1) e0280448 2023年

    DOI: 10.1371/journal.pone.0280448  

    詳細を見る 詳細を閉じる

    Transient receptor potential (TRP) channels are activated by various extracellular and intracellular stimuli and are involved in many physiological events. Because compounds that act on TRP channels are potential candidates for therapeutic agents, a simple method for evaluating TRP channel activation is needed. In this study, we demonstrated that a transforming growth factor alpha (TGFα) shedding assay, previously developed for detecting G-protein-coupled receptor (GPCR) activation, can also detect TRP channel activation. This assay is a low-cost, easily accessible method that requires only an absorbance microplate reader. Mechanistically, TRP-channel-triggered TGFα shedding is achieved by both of a disintegrin and metalloproteinase domain-containing protein 10 (ADAM10) and 17 (ADAM17), whereas the GPCR-induced TGFα shedding response depends solely on ADAM17. This difference may be the result of qualitative or quantitative differences in intracellular Ca2+ kinetics between TRP channels and GPCRs. Use of epidermal growth factor (EGF) and betacellulin (BTC), substrates of ADAM10, improved the specificity of the shedding assay by reducing background responses mediated by endogenously expressed GPCRs. This assay for TRP channel measurement will not only facilitate the high-throughput screening of TRP channel ligands but also contribute to understanding the roles played by TRP channels as regulators of membrane protein ectodomain shedding.

  22. Allosteric modulation of GPCR-induced β-arrestin trafficking and signaling by a synthetic intrabody 国際誌 査読有り

    Mithu Baidya, Madhu Chaturvedi, Hemlata Dwivedi-Agnihotri, Ashutosh Ranjan, Dominic Devost, Yoon Namkung, Tomasz Maciej Stepniewski, Shubhi Pandey, Minakshi Baruah, Bhanupriya Panigrahi, Parishmita Sarma, Manish K. Yadav, Jagannath Maharana, Ramanuj Banerjee, Kouki Kawakami, Asuka Inoue, Jana Selent, Stéphane A. Laporte, Terence E. Hébert, Arun K. Shukla

    Nature Communications 13 (1) 4634-4634 2022年12月

    DOI: 10.1038/s41467-022-32386-x  

    eISSN:2041-1723

  23. Membrane phosphoinositides regulate GPCR-β-arrestin complex assembly and dynamics 国際誌 査読有り

    John Janetzko, Ryoji Kise, Benjamin Barsi-Rhyne, Dirk H. Siepe, Franziska M. Heydenreich, Kouki Kawakami, Matthieu Masureel, Shoji Maeda, K. Christopher Garcia, Mark von Zastrow, Asuka Inoue, Brian K. Kobilka

    Cell 185 (24) 4560-4573.e19 2022年11月23日

    DOI: 10.1016/j.cell.2022.10.018  

    ISSN:0092-8674

    eISSN:1097-4172

  24. Endogenous ligand recognition and structural transition of a human PTH receptor. 国際誌 査読有り

    Kazuhiro Kobayashi, Kouki Kawakami, Tsukasa Kusakizako, Hirotake Miyauchi, Atsuhiro Tomita, Kan Kobayashi, Wataru Shihoya, Keitaro Yamashita, Tomohiro Nishizawa, Hideaki E Kato, Asuka Inoue, Osamu Nureki

    Molecular cell 82 (18) 3468-3483.e5 2022年8月4日

    DOI: 10.1016/j.molcel.2022.07.003  

    ISSN:1097-2765

    eISSN:1097-4164

  25. Structure of the human galanin receptor 2 bound to galanin and Gq reveals the basis of ligand specificity and how binding affects the G-protein interface 国際誌 査読有り

    Yunseok Heo, Naito Ishimoto, Ye Eun Jeon, Ji Hye Yun, Mio Ohki, Yuki Anraku, Mina Sasaki, Shunsuke Kita, Hideo Fukuhara, Tatsuya Ikuta, Kouki Kawakami, Asuka Inoue, Katsumi Maenaka, Jeremy R.H. Tame, Weontae Lee, Sam Yong Park

    PLoS Biology 20 (8) e3001714 2022年8月

    DOI: 10.1371/journal.pbio.3001714  

    ISSN:1544-9173

    eISSN:1545-7885

  26. Phosphorylation barcode ensembles encoded by biased CXCR3 agonists direct non-redundant chemokine signaling

    Dylan S. Eiger, Jeffrey Smith, Tujin Shi, Tomasz M. Stepniewski, Christopher Honeycutt, Noelia Boldizsar, Julia Gardner, Chia Feng Tsai, Carrie Nicora, Ahmed Moghieb, Kouki Kawakami, Issac Choi, Richard Smith, Asuka Inoue, Jana Selent, Jon Jacobs, Sudarshan Rajagopal

    FASEB journal : official publication of the Federation of American Societies for Experimental Biology 36 2022年5月1日

    DOI: 10.1096/fasebj.2022.36.S1.0R486  

    eISSN:1530-6860

  27. Phenotypic evaluation of constitutive GPCR/G-protein signaling in zebrafish embryos and larvae 国際誌 査読有り

    Takeaki Shibata, Kouki Kawakami, Hiroki Kawana, Junken Aoki, Asuka Inoue

    Biochemical and Biophysical Research Communications 602 70-76 2022年4月

    DOI: 10.1016/j.bbrc.2022.02.098  

    ISSN:0006-291X

    eISSN:1090-2104

  28. Author Correction: Structural basis of sphingosine-1-phosphate receptor 1 activation and biased agonism (Nature Chemical Biology, (2022), 18, 3, (281-288), 10.1038/s41589-021-00930-3) 国際誌 査読有り

    Zhenmei Xu, Tatsuya Ikuta, Kouki Kawakami, Ryoji Kise, Yu Qian, Ruixue Xia, Ming Xia Sun, Anqi Zhang, Changyou Guo, Xue Hui Cai, Zhiwei Huang, Asuka Inoue, Yuanzheng He

    Nature Chemical Biology 18 (3) 352-352 2022年3月

    DOI: 10.1038/s41589-022-00968-x  

    ISSN:1552-4450

    eISSN:1552-4469

  29. An intrabody sensor to monitor conformational activation of β-arrestins 国際誌 査読有り

    Hemlata Dwivedi-Agnihotri, Parishmita Sarma, S. Deeksha, Kouki Kawakami, Asuka Inoue, Arun K. Shukla

    Methods in Cell Biology 169 267-278 2022年

    DOI: 10.1016/bs.mcb.2021.12.023  

    ISSN:0091-679X

  30. Structural basis of sphingosine-1-phosphate receptor 1 activation and biased agonism 国際誌 査読有り

    Zhenmei Xu, Tatsuya Ikuta, Kouki Kawakami, Ryoji Kise, Yu Qian, Ruixue Xia, Ming-Xia Sun, Anqi Zhang, Changyou Guo, Xue-Hui Cai, Zhiwei Huang, Asuka Inoue, Yuanzheng He

    Nature Chemical Biology 18 (3) 281-288 2021年12月22日

    出版者・発行元: Springer Science and Business Media LLC

    DOI: 10.1038/s41589-021-00930-3  

    ISSN:1552-4450

    eISSN:1552-4469

  31. Intrinsic bias at non-canonical, β-arrestin-coupled seven transmembrane receptors 国際誌 査読有り

    Shubhi Pandey, Punita Kumari, Mithu Baidya, Ryoji Kise, Yubo Cao, Hemlata Dwivedi-Agnihotri, Ramanuj Banerjee, Xaria X. Li, Cedric S. Cui, John D. Lee, Kouki Kawakami, Jagannath Maharana, Ashutosh Ranjan, Madhu Chaturvedi, Gagan Deep Jhingan, Stéphane A. Laporte, Trent M. Woodruff, Asuka Inoue, Arun K. Shukla

    Molecular Cell 81 (22) 4605-4621.e11 2021年11月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.molcel.2021.09.007  

    ISSN:1097-2765

    eISSN:1097-4164

  32. Smoothened transduces hedgehog signals via activity-dependent sequestration of PKA catalytic subunits 国際誌 査読有り

    Corvin D. Arveseth, John T. Happ, Danielle S. Hedeen, Ju Fen Zhu, Jacob L. Capener, Dana Klatt Shaw, Ishan Deshpande, Jiahao Liang, Jiewei Xu, Sara L. Stubben, Isaac B. Nelson, Madison F. Walker, Kouki Kawakami, Asuka Inoue, Nevan J. Krogan, David J. Grunwald, Ruth Hüttenhain, Aashish Manglik, Benjamin R. Myers

    PLoS Biology 19 (4) e3001191 2021年4月

    DOI: 10.1371/journal.pbio.3001191  

    ISSN:1544-9173

    eISSN:1545-7885

  33. N6-methyladenosine (m6A) is an endogenous A3 adenosine receptor ligand 査読有り

    Akiko Ogawa, Chisae Nagiri, Wataru Shihoya, Asuka Inoue, Kouki Kawakami, Suzune Hiratsuka, Junken Aoki, Yasuhiro Ito, Takeo Suzuki, Tsutomu Suzuki, Toshihiro Inoue, Osamu Nureki, Hidenobu Tanihara, Kazuhito Tomizawa, Fan Yan Wei

    Molecular Cell 81 (4) 659-674.e7 2021年2月18日

    DOI: 10.1016/j.molcel.2020.12.038  

    ISSN:1097-2765

    eISSN:1097-4164

  34. Toward understanding the role of G-protein signaling 査読有り

    Ryoji Kise, Yuki Ono, Kouki Kawakami, Asuka Inoue

    Current Opinion in Endocrine and Metabolic Research 16 51-55 2021年2月

    DOI: 10.1016/j.coemr.2020.08.006  

    eISSN:2451-9650

  35. Heterotrimeric G Protein Subunit Gαq Is a Master Switch for Gβγ-Mediated Calcium Mobilization by Gi-Coupled GPCRs 査読有り

    Eva Marie Pfeil, Julian Brands, Nicole Merten, Timo Vögtle, Maddalena Vescovo, Ulrike Rick, Ina Maria Albrecht, Nina Heycke, Kouki Kawakami, Yuki Ono, Francois Marie Ngako Kadji, Suzune Hiratsuka, Junken Aoki, Felix Häberlein, Michaela Matthey, Jaspal Garg, Stephanie Hennen, Marie Lise Jobin, Kerstin Seier, Davide Calebiro, Alexander Pfeifer, Akos Heinemann, Daniela Wenzel, Gabriele M. König, Bernhard Nieswandt, Bernd K. Fleischmann, Asuka Inoue, Katharina Simon, Evi Kostenis

    Molecular Cell 80 (6) 940-954.e6 2020年12月17日

    DOI: 10.1016/j.molcel.2020.10.027  

    ISSN:1097-2765

    eISSN:1097-4164

  36. Key phosphorylation sites in GPCRs orchestrate the contribution of β-Arrestin 1 in ERK1/2 activation 査読有り

    Mithu Baidya, Punita Kumari, Hemlata Dwivedi-Agnihotri, Shubhi Pandey, Madhu Chaturvedi, Tomasz Maciej Stepniewski, Kouki Kawakami, Yubo Cao, Stéphane A. Laporte, Jana Selent, Asuka Inoue, Arun K. Shukla

    EMBO Reports 21 (9) 2020年9月3日

    DOI: 10.15252/embr.201949886  

    ISSN:1469-221X

    eISSN:1469-3178

  37. Agonist-induced formation of unproductive receptor-G<inf>12</inf> complexes 査読有り

    Najeah Okashah, Shane C. Wright, Kouki Kawakami, Signe Mathiasen, Joris Zhou, Sumin Lu, Jonathan A. Javitch, Asuka Inoue, Michel Bouvier, Nevin A. Lambert

    Proceedings of the National Academy of Sciences of the United States of America 117 (35) 21723-21730 2020年9月1日

    DOI: 10.1073/pnas.2003787117  

    ISSN:0027-8424

    eISSN:1091-6490

  38. Illuminating G-Protein-Coupling Selectivity of GPCRs 査読有り

    Asuka Inoue, Francesco Raimondi, Francois Marie Ngako Kadji, Gurdeep Singh, Takayuki Kishi, Akiharu Uwamizu, Yuki Ono, Yuji Shinjo, Satoru Ishida, Nadia Arang, Kouki Kawakami, J. Silvio Gutkind, Junken Aoki, Robert B. Russell

    Cell 177 (7) 1933-1947.e25 2019年6月13日

    DOI: 10.1016/j.cell.2019.04.044  

    ISSN:0092-8674

    eISSN:1097-4172

  39. Lysolipid receptor cross-talk regulates lymphatic endothelial junctions in lymph nodes 査読有り

    Yu Hisano, Mari Kono, Andreane Cartier, Eric Engelbrecht, Kuniyuki Kano, Kouki Kawakami, Yanbao Xiong, Wenji Piao, Sylvain Galvani, Keisuke Yanagida, Andrew Kuo, Yuki Ono, Satoru Ishida, Junken Aoki, Richard L. Proia, Jonathan S. Bromberg, Asuka Inoue, Timothy Hla

    Journal of Experimental Medicine 216 (7) 1582-1598 2019年

    DOI: 10.1084/jem.20181895  

    ISSN:0022-1007

    eISSN:1540-9538

  40. Lack of beta-arrestin signaling in the absence of active G proteins 査読有り

    Manuel Grundmann, Nicole Merten, Davide Malfacini, Asuka Inoue, Philip Preis, Katharina Simon, Nelly Rüttiger, Nicole Ziegler, Tobias Benkel, Nina Katharina Schmitt, Satoru Ishida, Ines Müller, Raphael Reher, Kouki Kawakami, Ayumi Inoue, Ulrike Rick, Toni Kühl, Diana Imhof, Junken Aoki, Gabriele M. König, Carsten Hoffmann, Jesus Gomeza, Jürgen Wess, Evi Kostenis

    Nature Communications 9 (1) 2018年12月1日

    DOI: 10.1038/s41467-017-02661-3  

    eISSN:2041-1723

  41. A single extracellular amino acid in Free Fatty Acid Receptor 2 defines antagonist species selectivity and G protein selection bias 査読有り

    Eugenia Sergeev, Anders Højgaard Hansen, Daniele Bolognini, Kouki Kawakami, Takayuki Kishi, Junken Aoki, Trond Ulven, Asuka Inoue, Brian D. Hudson, Graeme Milligan

    Scientific Reports 7 (1) 2017年12月1日

    DOI: 10.1038/s41598-017-14096-3  

    eISSN:2045-2322

  42. Genetic evidence that b-arrestins are dispensable for the initiation of b<inf>2</inf>-adrenergic receptor signaling to ERK 査読有り

    Morgan O'Hayre, Kelsie Eichel, Silvia Avino, Xuefeng Zhao, Dana J. Steffen, Xiaodong Feng, Kouki Kawakami, Junken Aoki, Karen Messer, Roger Sunahara, Asuka Inoue, Mark Von Zastrow, J. Silvio Gutkind

    Science Signaling 10 (484) 2017年6月20日

    DOI: 10.1126/scisignal.aal3395  

    ISSN:1945-0877

    eISSN:1937-9145

  43. Distinct conformations of GPCR-β-arrestin complexes mediate desensitization, signaling, and endocytosis 査読有り

    Thomas J. Cahill, Alex R.B. Thomsen, Jeffrey T. Tarrasch, Bianca Plouffe, Anthony H. Nguyen, Fan Yang, Li Yin Huang, Alem W. Kahsai, Daniel L. Bassoni, Bryant J. Gavino, Jane E. Lamerdin, Sarah Triest, Arun K. Shukla, Benjamin Berger, John Little, Albert Antar, Adi Blanc, Chang Xiu Qu, Xin Chen, Kouki Kawakami, Asuka Inoue, Junken Aoki, Jan Steyaert, Jin Peng Sun, Michel Bouvier, Georgios Skiniotis, Robert J. Lefkowitz

    Proceedings of the National Academy of Sciences of the United States of America 114 (10) 2562-2567 2017年3月7日

    DOI: 10.1073/pnas.1701529114  

    ISSN:0027-8424

    eISSN:1091-6490

︎全件表示 ︎最初の5件までを表示

MISC 78

  1. オーファンリガンドの責任受容体同定に向けたGPCR網羅的スクリーニング系の構築

    松下葵, 川上耕季, 福永彩美, 加藤英明, 加藤英明

    日本薬学会年会要旨集(Web) 146th 2026年

    ISSN: 0918-9823

  2. GPCR内在化経路の分子基盤解明に向けた網羅的解析

    成田智裕, 成田智裕, 川上耕季, 福永彩美, 加藤英明, 加藤英明

    日本薬学会年会要旨集(Web) 146th 2026年

    ISSN: 0918-9823

  3. GPCR構造薬理学の革新:迅速な構造決定からシグナル伝達の動的解明まで

    川上耕季, 加藤英明

    日本薬学会年会要旨集(Web) 146th 2026年

    ISSN: 0918-9823

  4. Antagonist-Agonist Switchingによる新規ブラジキニン2受容体作動薬の開発

    池田恵美, 池田恵美, 新開有紗, 新開有紗, GU Yuzhong, 小林和弘, 小林和弘, 川上耕季, 川上耕季, 加藤英明, 加藤英明, 斉藤毅, 斉藤毅

    日本薬学会年会要旨集(Web) 146th 2026年

    ISSN: 0918-9823

  5. Structural insights into allosteric activation and inactivation mechanisms of FFA2

    Mai Kugawa, Kouki Kawakami, Ryoji Kise, Carl- Mikael Suomivuori, Masaki Tsujimura, Kazuhiro Kobayashi, Asato Kojima, Wakana J. Inoue, Masahiro Fukuda, Toshiki E. Matsui, Ayami Fukunaga, Junki Koyanagi, Suhyang Kim, Hisako Ikeda, Keitaro Yamashita, Keisuke Saito, Hiroshi Ishikita, Ron O. Dror, Asuka Inoue, Hideaki E. Kato

    PROTEIN SCIENCE 34 2025年11月27日

    ISSN: 0961-8368

    eISSN: 1469-896X

  6. GPCR内在化経路の再評価とその薬理学的意義

    成田智裕, 成田智裕, 川上耕季, 加藤英明, 加藤英明

    日本生化学会大会(Web) 98th 2025年

  7. 社会性行動を制御するバソプレシン・オキシトシン交差認識の理解

    福永彩美, 福永彩美, 川上耕季, 度会晃行, 小柳淳暉, 福田昌弘, 小林和弘, 松井俊貴, GENG Lang, SCOTT Daniel, LI Yulong, 奧山輝大, 奧山輝大, 奧山輝大, 加藤英明, 加藤英明

    日本生化学会大会(Web) 98th 2025年

  8. GPCR内在化経路の再評価とその薬理学的意義

    成田智裕, 成田智裕, 川上耕季, 加藤英明, 加藤英明

    日本生化学会大会(Web) 98th 2025年

  9. GPCR内在化経路の探索

    成田智裕, 川上耕季, 加藤英明, 加藤英明

    日本薬学会年会要旨集(Web) 145th 2025年

    ISSN: 0918-9823

  10. 14-3-3-GPCR間相互作用誘導機構およびその機能解析

    カリニョ カーロマリオンコドッグ, 桑原莉来, 川上耕季, 柳川正隆, 井上飛鳥, 井上飛鳥

    日本生化学会大会(Web) 97th 2024年

  11. 14-3-3とGPCRの相互作用の制御機構とその機能解析

    CARINO Carlo Marion Codog, 桑原莉来, 川上耕季, 柳川正隆, 井上飛鳥, 井上飛鳥

    日本分子生物学会年会プログラム・要旨集(Web) 47th 2024年

  12. バソプレシン受容体による神経ペプチド交差認識の分子的理解

    福永彩美, 川上耕季, 小柳淳暉, 福田昌弘, 辻村真樹, 小林和弘, 松井俊貴, SCOTT Daniel J., 加藤英明, 加藤英明

    日本薬学会年会要旨集(Web) 144th 2024年

    ISSN: 0918-9823

  13. ミューオピオイド受容体作動薬副作用発現の基盤の解析

    CARINO Carlo Marion Codog, 平塚寿々音, 中村楽, 川上耕季, 柳川正隆, 井上飛鳥

    日本薬学会年会要旨集(Web) 144th 2024年

    ISSN: 0918-9823

  14. 短鎖脂肪酸受容体FFAR2のリガンド認識機構と活性化機構の解明

    九川真衣, 木瀬亮次, 福田昌弘, 川上耕季, 松井俊貴, 小林和弘, 井上飛鳥, 加藤英明

    日本薬学会年会要旨集(Web) 144th 2024年

    ISSN: 0918-9823

  15. 新規水溶性ブラジキニン2受容体作動薬の創製

    新開有紗, 新開有紗, GU Yuzhong, 川上耕季, 加藤英明, 斉藤毅, 斉藤毅

    GPCR研究会プログラム・抄録集 18th 2024年

  16. β-arrestinのPIP2新規結合部位の機能解析

    倉本律輝, 生田達也, コドック カリニョ・カーロ・マリオン, 川上耕季, 内田安則, 田口友彦, 柳川正隆, 井上飛鳥

    GPCR研究会プログラム・抄録集 18th 2024年

  17. ニューロテンシン受容体によるGタンパク質活性化過程の可視化

    川上耕季, 小林和弘, 松井俊貴, 福田昌弘, 新井大輝, 辰己茉菜絵, 小柳淳暉, 草木迫司, JANETZKO John, 山下恵太郎, 濡木理, KOBILKA Brian, 井上飛鳥, 加藤英明

    GPCR研究会プログラム・抄録集 18th 2024年

  18. レポーターアッセイを用いたGPCRシグナルネットワークの解明

    齋藤 郁貴, 木瀬 亮次, 川上 耕季, 井上 飛鳥

    日本生化学会大会プログラム・講演要旨集 96回 [2P-381] 2023年10月

    出版者・発行元: (公社)日本生化学会

  19. GPCRとβアレスチンの結合多様性と機能的役割の解析

    中村楽, 桑原莉来, 川上耕季, 井上飛鳥

    日本生化学会大会(Web) 96th [1T07a-346)] 2023年

    出版者・発行元: (公社)日本生化学会

  20. 遊離脂肪酸受容体(FFAR)の脂肪酸受容における鎖長選択性の解明

    九川真衣, 木瀬亮次, 福田昌弘, 川上耕季, 松井俊貴, 小林和弘, 井上飛鳥, 加藤英明, 加藤英明, 加藤英明

    日本生化学会大会(Web) 96th [2P-080] 2023年

    出版者・発行元: (公社)日本生化学会

  21. 構造生物学から見たバソプレシン・オキシトシンの分子理解

    福永彩美, 川上耕季, 小柳淳暉, 福田昌弘, 小林和弘, 松井俊貴, SCOTT Daniel J., 井上飛鳥, 加藤英明, 加藤英明

    バソプレシン・オキシトシン研究会プログラム・抄録集 33rd 2023年

  22. GPCR構造を決定する迅速で汎用的な手法の開発

    小島 朝翔, 松井 俊貴, 小林 直也, 福田 昌弘, 中村 星王, 川上 耕季, 小林 和弘, 加藤 英明

    日本薬理学会年会要旨集 97 1-B-SS04-5 2023年

    出版者・発行元: 公益社団法人 日本薬理学会

    DOI: 10.1254/jpssuppl.97.0_1-b-ss04-5  

    eISSN: 2435-4953

    詳細を見る 詳細を閉じる

    More than 30% of drugs exert their effects by modulating the activity of G protein-coupled receptors (GPCRs) as agonists or antagonists. To understand the working mechanism of drugs and design new ones, the 3D structural information on therapeutic target proteins is crucial. However, every previous approach to determine the structures of GPCRs requires time-consuming experimental screenings of the expression construct for each target. This process significantly hinders high-throughput structural analysis of GPCRs. Moreover, there is no universal strategy for cryo-EM analysis of GPCRs in both agonist- and antagonist-bound forms. Here, I present a new method for rapid cryo-EM structure determination of GPCRs, called NOAH (NOvel AI-assisted High-throughput construct screening for structural analysis). NOAH is a program that automatically generates the expression constructs of soluble protein-fused GPCRs suitable for cryo-EM analysis. By employing the NOAH pipeline, we can skip the process of experimental screening, saving a significant amount of time and resources on the project. As a proof-of-concept experiment, I applied this method to three GPCRs and determined not only the antagonist-bound structures but also an agonist-bound structure, demonstrating NOAH’s potential to facilitate GPCR structural biology and drug discovery.

  23. Gタンパク質αサブユニット活性化におけるαNの機能解析

    新井大輝, 辰己茉菜絵, 生田達也, 川上耕季, 井上飛鳥

    日本薬学会年会要旨集(Web) 143rd 2023年

    ISSN: 0918-9823

  24. GPCRにおけるバイアスシグナル創出基点とその機構の解析

    中村楽, 川上耕季, 生田達也, 井上飛鳥

    日本薬学会年会要旨集(Web) 143rd 2023年

    ISSN: 0918-9823

  25. βアレスチンの新規PIP2結合部位とその機能解析

    CARINO Carlo Marion Codog, 生田達也, 倉本律輝, 川上耕季, 内田安則, 田口友彦, 井上飛鳥

    日本薬学会年会要旨集(Web) 143rd 2023年

    ISSN: 0918-9823

  26. 短鎖脂肪酸受容体FFAR2のリガンド認識機構と活性化機構の解明

    九川真衣, 木瀬亮次, 福田昌弘, 川上耕季, 松井俊貴, 小林和弘, 井上飛鳥, 加藤英明, 加藤英明

    日本蛋白質科学会年会プログラム・要旨集 23rd (CD-ROM) 2023年

  27. バソプレシン受容体1aによる神経ペプチドホルモン認識の構造基盤

    福永彩美, 小柳淳暉, 福田昌弘, 川上耕季, 松井俊貴, 小林和弘, SCOTT Daniel J., 井上飛鳥, 加藤英明, 加藤英明

    日本蛋白質科学会年会プログラム・要旨集 23rd (CD-ROM) 2023年

  28. マルチレイヤー解析技術によるシグナル伝達-生命現象の解読 オピオイド受容体のシグナル解読とバイアス型リガンドによる自在制御

    川上 耕季, 生田 達也, 井上 飛鳥

    日本生化学会大会プログラム・講演要旨集 95回 1S15e-03 2022年11月

    出版者・発行元: (公社)日本生化学会

  29. マルチレイヤー解析技術によるシグナル伝達-生命現象の解読 オピオイド受容体のシグナル解読とバイアス型リガンドによる自在制御

    川上 耕季, 生田 達也, 井上 飛鳥

    日本生化学会大会プログラム・講演要旨集 95回 1S15e-03 2022年11月

    出版者・発行元: (公社)日本生化学会

  30. PTH1受容体における内在性リガンドの認識機構と構造ダイナミクス

    小林 和弘, 川上 耕季, 草木迫 司, 郷野 弘剛, 富田 敦弘, 小林 幹, 志甫谷 渉, 山下 恵太郎, 西澤 知宏, 加藤 英明, 井上 飛鳥, 濡木 理

    日本生化学会大会プログラム・講演要旨集 95回 2T12a-07 2022年11月

    出版者・発行元: (公社)日本生化学会

  31. βアレスチンの結合様式と機能の包括的理解

    倉本 律輝, 川上 耕季, 生田 達也, 桑原 莉来, 吉田 美沙紀, 井上 飛鳥

    日本薬学会年会要旨集 142年会 26N-am07S 2022年3月

    出版者・発行元: (公社)日本薬学会

    ISSN: 0918-9823

  32. PTH1受容体における内在性リガンドの認識機構と構造ダイナミクス

    小林和弘, 川上耕季, 草木迫司, 郷野弘剛, 富田敦弘, 小林幹, 志甫谷渉, 山下恵太郎, 山下恵太郎, 西澤知宏, 加藤英明, 加藤英明, 井上飛鳥, 濡木理

    日本生化学会大会(Web) 95th 2T12a-07 2022年

    出版者・発行元: (公社)日本生化学会

  33. Gαタンパク質を起点したGRK-βアレスチン機能制御機構

    川上耕季, 柳川正隆, 平塚寿々音, 佐甲靖志, 井上飛鳥

    GPCR研究会プログラム・抄録集 17th 2022年

  34. 第三の結合様式におけるβアレスチンの機能の解明

    桑原莉来, 川上耕季, 倉本律輝, 生田達也, 井上飛鳥

    GPCR研究会プログラム・抄録集 17th 2022年

  35. 日本人に特徴的なGPCR遺伝子バリアントの探索

    鈴木璃子, 生田達也, 川上耕季, 井上飛鳥

    日本分子生物学会年会プログラム・要旨集(Web) 45th 2022年

  36. PTH1Rの構造多形から明らかになったリガンド認識における分子相互基盤と持続的受容体活性化メカニズム

    小林 和弘, 川上 耕季, 草木迫 司, 郷野 弘剛, 富田 篤弘, 小林 幹, 志甫谷 渉, 山下 恵太郎, 西澤 知宏, 加藤 英明, 井上 飛鳥, 濡木 理

    日本薬理学会年会要旨集 95 2-YIA-66 2022年

    出版者・発行元: 公益社団法人 日本薬理学会

    DOI: 10.1254/jpssuppl.95.0_2-yia-66  

    eISSN: 2435-4953

    詳細を見る 詳細を閉じる

    Parathyroid hormone receptor 1 (PTH1R) is a class B G-protein-coupled receptor (GPCR), consisting of extracellular domain (ECD) and transmembrane domain (TMD). PTH1R is activated by two endogenous peptide hormones called PTH and PTHrP. These hormones share similar sequences and activate the stimulatory G-protein (Gs) signaling pathway but show different physiological functions by the differences in the ligand dissociation kinetics. However, the structural basis for ligand recognition and ligand kinetics remains elusive. We revealed the activated PTH1R structure binding the two endogenous hormones, respectively. The structures and mutagenesis revealed distinct molecular recognition for each ligand and conserved active mechanism of PTH1R. Moreover, these structures elucidate molecular switch toggling signaling periods, responsible for the different pharmacological effects. Furthermore, we revealed five distinct structures PTH-PTH1R-Gs toward inactive transition. These sequential structures and molecular dynamics simulations revealed that an unwinding middle region of PTH induces PTH dissociating from PTH1R. This is the first GPCR structure that suggests the ECD allosterically modulates the activation of the receptor. Our structure provides structural insight for a different signal duration and another strategy for drag development for fine-tuning a duration of the receptor activation.

  37. 分子から迫る神経薬理学 Gタンパク質共役型受容体のシグナル伝達-バイアスシグナル創薬の黎明

    川上耕季, 井上飛鳥

    Clinical Neuroscience 40 (4) 401-403 2022年

    出版者・発行元: (株)中外医学社

    ISSN: 0289-0585

  38. 分子から迫る神経薬理学 GPCRシグナル検出系の開発

    川上耕季, 井上飛鳥

    Clinical Neuroscience 40 (5) 557-559 2022年

    出版者・発行元: (株)中外医学社

    ISSN: 0289-0585

  39. Toward understanding the role of G-protein signaling

    Ryoji Kise, Yuki Ono, Kouki Kawakami, Asuka Inoue

    Current Opinion in Endocrine and Metabolic Research 16 51-55 2021年2月

    DOI: 10.1016/j.coemr.2020.08.006  

    eISSN: 2451-9650

  40. ミューオピオイド受容体(MOR)アゴニストの副作用関連シグナル解析

    平塚寿々音, 川上耕季, 吉田美沙紀, 青木淳賢, 青木淳賢, 井上飛鳥, 井上飛鳥

    日本薬学会年会要旨集(Web) 141st 27V09-pm19S 2021年

    出版者・発行元: (公社)日本薬学会

    ISSN: 0918-9823

  41. NanoBiT-BRET法によるGPCRシグナル複合体解析

    川上耕季, 平塚寿々音, 桑原莉来, 吉田美沙紀, 井上飛鳥

    日本生化学会大会(Web) 94th [1T13e-680)] 2021年

    出版者・発行元: (公社)日本生化学会

  42. GRK3選択的活性化機構の生化学的解析

    カリニョ カーロマリオンコドッグ, 生田達也, 志甫谷渉, 川上耕季, 平塚寿々音, 濡木理, 井上飛鳥

    日本生化学会大会(Web) 94th [P-566] 2021年

    出版者・発行元: (公社)日本生化学会

  43. ミューオピオイド受容体作動薬の副作用発現を担うシグナル制御因子

    平塚寿々音, 川上耕季, 井上飛鳥

    日本生化学会大会(Web) 94th [P-541] 2021年

    出版者・発行元: (公社)日本生化学会

  44. バソプレシンV2受容体に対するβアレスチンの結合様式と構造変化

    倉本律輝, 生田達也, 川上耕季, 井上飛鳥

    日本生化学会大会(Web) 94th [1T15m-194)] 2021年

    出版者・発行元: (公社)日本生化学会

  45. βアレスチンの機能多様性の分子機構の解析

    川上耕季, 井上飛鳥

    GPCR研究会プログラム・抄録集 16th (Web) 2021年

  46. RNA修飾代謝物のN6-methyladenosine(m6A)は受容体応答を引き起こす新規液性因子である

    小川亜希子, 小川亜希子, 名切千彩恵, 志甫谷渉, 井上飛鳥, 川上耕季, 平塚寿々音, 青木淳賢, 青木淳賢, 伊藤康裕, 鈴木健夫, 鈴木勉, 井上俊洋, 濡木理, 富澤一仁, 魏范研, 魏范研

    日本生化学会大会(Web) 94th [P-546] 2021年

    出版者・発行元: (公社)日本生化学会

  47. βアレスチンのGPCRへの結合様式の違いによる機能の差異の解明

    桑原莉来, 川上耕季, 吉田美沙紀, 平塚寿々音, 辰己茉菜絵, 井上飛鳥

    日本生化学会大会(Web) 94th [P-599] 2021年

    出版者・発行元: (公社)日本生化学会

  48. 三量体G蛋白質-GEF-GAPシグナル:受容体シグナルの時空間的選択性と多様性の生化学 GPCRバイアスリガンドのシグナル機構の理解

    川上 耕季, 平塚 寿々音, 井上 飛鳥

    日本生化学会大会プログラム・講演要旨集 93回 [2S03a-03] 2020年9月

    出版者・発行元: (公社)日本生化学会

  49. GPCRバイアスリガンドのシグナル機構の理解

    川上耕季, 平塚寿々音, 井上飛鳥, 井上飛鳥

    日本生化学会大会(Web) 93rd 2020年

  50. Gタンパク質依存的なβアレスチン制御メカニズムの発見と解析

    川上耕季, 柳川正隆, 平塚寿々音, SHUKLA Arun K., 佐甲靖志, 青木淳賢, 青木淳賢, 青木淳賢, 井上飛鳥, 井上飛鳥, 井上飛鳥

    日本生化学会大会(Web) 93rd [P-422] 2020年

    出版者・発行元: (公社)日本生化学会

  51. μオピオイド受容体におけるGPCRキナーゼの選択的活性化機構の解明

    平塚寿々音, 川上耕季, 吉田美沙紀, 青木淳賢, 青木淳賢, 井上飛鳥, 井上飛鳥

    日本生化学会大会(Web) 93rd [1Z10-420)] 2020年

    出版者・発行元: (公社)日本生化学会

  52. NanoBiTを用いたGαq-PLCβ相互作用解析手法の開発とGq共役型受容体の機能解析

    西郷雄貴, 川上耕季, 平塚寿々音, 青木淳賢, 青木淳賢, 井上飛鳥, 井上飛鳥, 井上飛鳥

    日本生化学会大会(Web) 93rd [P-424] 2020年

    出版者・発行元: (公社)日本生化学会

  53. βアレスチン構造センサーを用いたバイアスリガンドとシグナル伝達の解明

    吉田美沙紀, 川上耕季, 平塚寿々音, SHUKLA Arun K., 青木淳賢, 青木淳賢, 井上飛鳥, 井上飛鳥

    日本生化学会大会(Web) 93rd [2Z11-434)] 2020年

    出版者・発行元: (公社)日本生化学会

  54. Gαiファミリー欠損細胞を用いたGPCR-Gαiサブタイプの共役の解析

    小野雄基, 井上飛鳥, 井上飛鳥, 石田覚, 川上耕季, 青木淳賢, 青木淳賢

    日本薬学会年会要旨集(CD-ROM) 139th (3) 64-64 2019年

    出版者・発行元: (公社)日本薬学会

    ISSN: 0918-9823

  55. GRK欠損HEK293細胞の作製と各種リガンドのGRKサプタイプ選択性評価

    平塚寿々音, 川上耕季, 井上飛鳥, 井上飛鳥, 青木淳賢, 青木淳賢

    日本生化学会大会(Web) 92nd [2P-207] 2019年

    出版者・発行元: (公社)日本生化学会

  56. GPCRキナーゼ解析ツールの開発とバイアス型リガンドの解析

    川上耕季, 川上耕季, 井上飛鳥, 井上飛鳥, 井上飛鳥, 平塚寿々音, 青木淳賢, 青木淳賢

    日本生化学会大会(Web) 92nd [3T07m-03] 2019年

    出版者・発行元: (公社)日本生化学会

  57. GRK解析ツールの開発とバイアス型リガンドの理解

    川上耕季, 川上耕季, 井上飛鳥, 井上飛鳥, 平塚寿々音, 青木淳賢, 青木淳賢

    GPCR研究会プログラム・抄録集 15th 2019年

  58. Gタンパク質共役選択性の理解

    井上飛鳥, 井上飛鳥, 井上飛鳥, RAIMONDI Francesco, KADJI Francois Marie Ngako, SINGH Gurdeep, 岸貴之, 上水明治, 小野雄基, 新上雄司, 石田覚, ARANG Nadia, 川上耕季, GUTKIND J.Silvio, 青木淳賢, 青木淳賢, RUSSELL Robert B.

    GPCR研究会プログラム・抄録集 15th 2019年

  59. GPCR-Gタンパク質共役データベースを利用したG12選択的DREADDの作製

    小野雄基, 井上飛鳥, 井上飛鳥, 井上飛鳥, RAIMONDI Francesco, KADJI Francois Marie Ngako, SINGH Gurdeep, 岸孝之, 上水明治, 新上雄司, 石田覚, ARANG Nadia, 川上耕季, GUTKIND J Silvio, 青木淳賢, RUSSELL Roberet B.

    GPCR研究会プログラム・抄録集 15th 2019年

  60. アミノ酸点変異導入による新規GPCR活性化手法の開発

    柴田剛明, 井上飛鳥, 井上飛鳥, 川上耕季, 木瀬亮次, 木瀬亮次, 青木淳賢, 青木淳賢, 青木淳賢

    日本薬学会年会要旨集(CD-ROM) 138th 2018年

  61. オーファンGPCRに対するGαタンパク質共役解析

    川上耕季, 井上飛鳥, 井上飛鳥, 青木淳賢, 青木淳賢, 青木淳賢

    日本生化学会大会(Web) 91st [1P-216] 2018年

    出版者・発行元: (公社)日本生化学会

  62. 全Giファミリー分子欠損細胞の作製とGi共役型受容体シグナルの解析

    小野雄基, 井上飛鳥, 石田覚, 川上耕季, 青木淳賢

    次世代を担う若手ファーマ・バイオフォーラム講演要旨集 17th 2018年

  63. Gαi欠損HEK293細胞の作製と評価

    小野雄基, 井上飛鳥, 井上飛鳥, 石田覚, 川上耕季, 青木淳賢, 青木淳賢, 青木淳賢

    日本生化学会大会(Web) 91st [1P-219] 2018年

    出版者・発行元: (公社)日本生化学会

  64. ゼブラフィッシュにおけるGPCR活性化検出系の確立

    柴田剛明, 井上飛鳥, 井上飛鳥, 木瀬亮次, 川上耕季, 青木淳賢, 青木淳賢

    日本生化学会大会(Web) 90th 2017年

  65. 3.43Q変異に起因する恒常活性化GPCRの解析

    川上耕季, 井上飛鳥, 井上飛鳥, 井上飛鳥, 柴田剛明, 青木淳賢, 青木淳賢

    GPCR研究会プログラム・抄録集 14th 2017年

  66. 恒常活性化変異GPCRの性状解析

    川上耕季, 井上飛鳥, 井上飛鳥, 井上飛鳥, 柴田剛明, 青木淳賢, 青木淳賢

    次世代を担う若手ファーマ・バイオフォーラム講演要旨集 16th 2017年

  67. LPAシグナルは細胞形態の維持に重要である

    木瀬亮次, 川上耕季, 可野邦行, 井上飛鳥, 井上飛鳥, 青木淳賢, 青木淳賢

    日本細胞生物学会大会(Web) 69th 2017年

  68. 高輝度スプリットルシフェラーゼを用いたGタンパク質センサー

    井上飛鳥, 井上飛鳥, 井上飛鳥, KADJI Francois Marie, 川上耕季, 青木淳賢, 青木淳賢

    GPCR研究会プログラム・抄録集 14th 2017年

  69. 恒常活性がみられるGPCRの発現解析

    柴田剛明, 井上飛鳥, 井上飛鳥, 井上飛鳥, 川上耕季, 青木淳賢, 青木淳賢

    日本薬学会年会要旨集(CD-ROM) 137th 2017年

  70. 三量体Gタンパク質の活性化センサーの開発

    井上飛鳥, 井上飛鳥, KADJI Francois Marie, 川上耕季, 青木淳賢, 青木淳賢

    日本生化学会大会(Web) 90th 2017年

  71. 恒常活性がみられる点変異GPCRの発現解析

    柴田剛明, 井上飛鳥, 井上飛鳥, 井上飛鳥, 川上耕季, 青木淳賢, 青木淳賢

    GPCR研究会プログラム・抄録集 14th 2017年

  72. Gαi欠損HEK293細胞の作成

    小野雄基, 井上飛鳥, 井上飛鳥, 井上飛鳥, 石田覚, 川上耕季, 青木淳賢, 青木淳賢

    日本生化学会大会(Web) 90th 2017年

  73. 3.43Q変異に起因する恒常活性化GPCRの性状解析

    川上耕季, 井上飛鳥, 井上飛鳥, 井上飛鳥, 柴田剛明, 青木淳賢, 青木淳賢

    日本生化学会大会(Web) 90th 2017年

  74. 多数のGPCRを共通に活性化させる変異の解析

    川上耕季, 井上飛鳥, 井上飛鳥, 井上飛鳥, 柴田剛明, 金藤奨, 青木淳賢, 青木淳賢

    日本薬学会年会要旨集(CD-ROM) 137th 2017年

  75. 全LPA受容体欠損細胞の作製とLPA研究への応用

    川上耕季, 井上飛鳥, 井上飛鳥, 青木淳賢, 青木淳賢

    日本生化学会大会(Web) 89th 2016年

  76. β-arrestin欠損細胞の作製とGPCR研究への応用

    川上耕季, 井上飛鳥, 井上飛鳥, 石田覚, 青木淳賢

    GPCR研究会プログラム・抄録集 13th 2016年

  77. β-arrestin欠損細胞の作製

    川上耕季, 井上飛鳥, 井上飛鳥, 石田覚, 青木淳賢, 青木淳賢

    日本薬学会東北支部大会講演要旨集 54th 2015年

  78. GPCRシグナル解析ツールの開発

    石田覚, 井上飛鳥, 井上飛鳥, 新上雄司, 川上耕季, 青木淳賢, 青木淳賢

    日本生化学会大会(Web) 88th 2015年

︎全件表示 ︎最初の5件までを表示

産業財産権 4

  1. TSH受容体に対する自己抗体活性の測定方法及びキット

    川嵜 淳史, 保科 元気, 青木 淳賢, 川上 耕季, 井上 飛鳥

    特許第7211596号

    産業財産権の種類: 特許権

  2. TSH受容体に対する自己抗体活性の測定方法及びキット

    川嵜 淳史, 保科 元気, 青木 淳賢, 川上 耕季, 井上 飛鳥

    産業財産権の種類: 特許権

  3. 改変型バソプレシン受容体を発現する培養細胞

    土居 耕介, 井上 飛鳥, 生田 達也, 川上 耕季

    産業財産権の種類: 特許権

  4. AVP受容体及びその利用

    土居 耕介, 井上 飛鳥, 生田 達也, 川上 耕季

    産業財産権の種類: 特許権

共同研究・競争的資金等の研究課題 6

  1. 局所pHシグナルの人為的操作・計測技術の開発

    加藤 英明, 川上 耕季

    2025年4月 ~ 2030年3月

  2. Gタンパク質シグナル阻害ツールセットの創出

    川上 耕季

    2026年4月1日 ~ 2029年3月31日

  3. GPCR低分子創薬を加速する革新的DELスクリーニングプラットフォーム開発研究

    加藤 英明, 川上 耕季

    2026年4月 ~ 2029年3月

  4. コア型βアレスチンの機能とその分子基盤の解明

    川上 耕季

    2024年4月 ~ 2026年3月

  5. GPCR網羅的な内在化経路の同定と内在化経路選択の構造基盤解明

    川上 耕季

    2023年4月 ~ 2026年3月

  6. 易活性化型変異を導入した人工Gタンパク質共役型受容体の創製と応用

    川上 耕季

    2019年4月 ~ 2021年3月

    詳細を見る 詳細を閉じる

    本研究においては、これまでに同定している多数のGPCRの共通に活性化させる変異(BW:3.43Q)を、GPCR解析ツールとして応用し、未解明のGPCR研究の課題に取り組む。 その前段階として、より多くのGPCRを活性化させる変異の適用拡大を図った。 まず、我々がこれまでに解析してきた多数のGPCRのシグナル解析の結果に加え、ClassAに属するGPCRの配列アライメント、既報のGPCR三次元構造の情報を組み合わせることで、GPCR活性化、Gタンパク質共役に関わるアミノ酸位置とアミノ酸の性質の網羅的同定と、活性化、Gタンパク質共役を予測する配列アルゴリズムの構築(Inoue et al., Cell 177, 1-15 (2019))を行なった。この解析から、多くのGPCR活性化に関わると想定されるアミノ酸位置や、特定のシグナルを伝達する上で重要と推測されるアミノ酸位置を抽出した。その結果、3.43Q以外にもGPCRを活性化、さらには、特定のシグナルのみを活性化しうる変異の候補が得られた。その候補変異を導入したDNAコンストラクトを作成し、HEK293細胞に発現させ、シグナルアッセイを行い、実際に特定のシグナルを高選択的に伝達する変異の同定に至っている。 さらに、前述の3.43Qが与えるGPCR活性化に与える影響を解析を行なった。特に既報の構造情報から、不活性化状態、活性化状態における構造変化から、相互作用するアミノ酸位置と性質に着目した。3.43Q変異に加え、着目した3箇所の変異をさらに加えることで、NTS1(ニューロテンシン受容体)やEP4(プロスタグランジンE2受容体)など、リガンド既知GPCRにおいて、より多くのGPCRに適用可能な、より強力に活性化を誘導可能な変異の同定に至った。

︎全件表示 ︎最初の5件までを表示