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MORIGAKI KenichiBiosignal Research CenterProfessor
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■ Award- Nov. 2023 16th International Symposium on Nanomedicine (ISNM2023), Best Poster Awards, Model Membrane Arrays Prepared by Self-Spreading of Lipid Bilayers in Preformed Polymeric Lipid Bilayer ChannelsInternational society
- Nov. 2023 第61回日本生物物理学会, 日本生物物理学会学生発表賞, 人工膜とナノ空間を用いた膜結合分子の動的挙動の計測Japan society
- Jan. 2021 電気学会, 電気学会・技術委員会奨励賞, パターン化人工膜への膜タンパク質の再構成Japan society
- May 2018 第9回日本光合成学会年会, 優秀研究賞, パターン化人工生体膜を用いた光合成機構の再構成Japan society
- Oct. 2009 第82回日本生化学会大会, 優秀プレゼンテーション賞, ケージド化合物を用いたP450酵素活性の光制御Japan society
- American Chemical Society (ACS), May 2025, Langmuir, 41(18) (18), 11284 - 11292[Refereed]Scientific journal
- Springer Science and Business Media LLC, Mar. 2025, Scientific Reports, 15(1) (1)Scientific journal
- Elsevier BV, Sep. 2024, Biophysical Journal, 123(18) (18), 3242 - 3256, English[Refereed]Scientific journal
- Corresponding, American Chemical Society (ACS), Jan. 2024, Nano Letters, 24(6) (6), 1825 - 1834[Refereed]Scientific journal
- Elsevier BV, Jan. 2024, Neuroscience Letters, 821, 137623 - 137623, English[Refereed]Scientific journal
- American Chemical Society (ACS), Feb. 2023, The Journal of Physical Chemistry B, 127(8) (8), 1715 - 1727, English[Refereed]Scientific journal
- The biological membrane is a complex two-dimensional fluid, in which various molecular interactions regulate the lateral diffusion of membrane-associated molecules. Pinning of membrane proteins or lipids by extra-membrane proteins impedes the diffusion. In addition, coupling between two monolayer leaflets within a phospholipid bilayer via interdigitation plays important roles, though this effect remains elusive. Here, we fabricate a substrate-supported model membrane with patterned bilayer/monolayer regions to explore the influences of interleaflet coupling. A patterned monolayer of polymerized diacetylene phospholipid, 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3-phosphocholine (DiynePC), was lithographically generated and used to form patterned lipid bilayers and monolayers. A phospholipid monolayer was formed on top of the polymerized monolayer. The bilayer/monolayer hybrid membrane was continuous and fluid, but lateral diffusion in the monolayer region was significantly retarded, suggesting the influences of interleaflet coupling. We reconstituted photoreceptor rhodopsin (Rh) and G-protein transducin (Gt) as model transmembrane and peripheral proteins. Rh diffused laterally only in the bilayer region, whereas Gt diffused in both bilayer and monolayer regions. The patterned hybrid bilayer/monolayer membrane reproduces the retarded diffusion and confinement of membrane-bound molecules in a controlled manner and provides insight into the physicochemical and functional roles of semipermeable corrals in the cell membrane.Jan. 2023, The journal of physical chemistry. B, 127(2) (2), 520 - 527, English, International magazine[Refereed]Scientific journal
- Elsevier BV, Dec. 2022, Journal of Photochemistry and Photobiology B: Biology, 237, 112585 - 112585, English[Refereed]Scientific journal
- Membrane proteins play essential roles in the cell, and they constitute one of the most important targets of drugs. Studying membrane proteins in a controlled model membrane environment can provide unambiguous, quantitative information on their molecular properties and functions. However, reconstituting membrane proteins in a model system poses formidable technological challenges. Here, we developed a novel model membrane platform for highly sensitive observation of membrane proteins by combining a micropatterned lipid membrane and a nanofluidic channel. A micropatterned model membrane was generated by lithographically integrating a polymerized lipid bilayer and a natural (fluid) lipid bilayer. A nanofluidic channel having a defined thickness was formed between the fluid bilayer and a polydimethylsiloxane (PDMS) slab by attaching the polymeric bilayer and PDMS slab using an adhesion layer composed of silica nanoparticles that are coated with a biocompatible polymer brush. As we reconstituted rhodopsin (Rh), a G-protein-coupled receptor (GPCR), from a detergent-solubilized state into the fluid bilayer, only successfully reconstituted Rh molecules diffused laterally in the lipid bilayer and migrated into the nanogap junction, where they could be observed with a vastly improved signal-to-background ratio. The nanogap junction effectively separates the sites of reconstitution and observation and provides a novel platform for studying the molecular properties and functions of membrane proteins at the single-molecular level.American Chemical Society (ACS), Jun. 2022, Langmuir, 38(23) (23), 7234 - 7243, English, International magazine[Refereed]Scientific journal
- Dopamine D2 receptor (D2R), a G-protein-coupled receptor (GPCR), plays critical roles in neural functions and represents the target for a wide variety of drugs used to treat neurological diseases. However, its fundamental physicochemical properties, such as dimerization and affinity to different lipid environments, remain unknown. Here, reconstitution and characterization of D2R in a supported model membrane in nanometric confinement are reported. D2R is expressed in Chinese hamster ovary (CHO) cells and transferred into the supported model membrane as cell membrane blebs. D2R molecules are reconstituted with an elevated density in the cleft between the substrate and poly(dimethylsiloxane) (PDMS) elastomer. Reconstituted D2R retains the physiological functions, as evaluated from its binding to an antagonist and dimerization lifetime. The transient dimer formation of D2R, similar to the live cell, suggests that it is an innate property that does not depend on the cellular structures such as actin filaments. Although the mechanism of this unique reconstitution process is currently not fully understood, the finding points to a new possibility of using a nanometric space (<100 nm thick) as a platform for reconstituting and studying membrane proteins under the quasi-physiological conditions, which are difficult to be created by other methods.Dec. 2021, Adv. Biology, 5(12) (12), 2100636, English, International magazine[Refereed]Scientific journal
- The Institute of Electrical Engineers of Japan, Dec. 2021, IEEJ Transactions on Electronics, Information and Systems, 141(12) (12), 1340 - 1343, Japanese
Model biological membranes are a useful tool to study the molecular properties and functions of membrane proteins. We develop a strategy to directly reconstitute mammalian membrane proteins from the cell membrane into a model biological membrane to bypass the technically challenging solubilization and purification processes. We expressed dopamine D2 receptor (D2R), a G-protein coupled receptor (GPCR), in Chinese hamster ovary (CHO) cells and produced cell membrane blebs by chemical induction. By introducing blebs into a patterned framework of lithographically-polymerized lipid bilayer on the substrate surface, we could form a planar bilayer and observe single molecules of D2R. Interestingly, a much higher density of D2R molecules were reconstituted in a nanometric cleft between the substrate and a poly-dimethylsiloxane (PDMS) elastomer sheet. This methodology should enable to evaluate the physicochemical properties and functions of a wide range of mammalian membrane proteins.
[Refereed][Invited]Scientific journal - Wiley, Apr. 2021, Small, 17(14) (14), 2006608 - 2006608, English[Refereed]Scientific journal
- Biophysical Society of Japan, Sep. 2020, Biophysics and Physicobiology, 17(0) (0), 125 - 129, English[Refereed]Scientific journal
- Last, Elsevier BV, Sep. 2020, Neuroscience Letters, 736, 135288 - 135288, English[Refereed]Scientific journal
- Thylakoid membranes in the chloroplast of plants, algae, and cyanobacteria are the powerhouse of photosynthesis, capturing solar energy and converting it into chemical energy. Although their structures and functions have been extensively studied, the intrinsically heterogeneous and dynamic nature of the membrane structures is still not fully understood. Investigating native thylakoid membranes in vivo is difficult due to their small size and limited external access to the chloroplast interior, while the bottom-up approaches based on model systems have been hampered by the sheer complexity of the native membrane. Here, we try to fill the gap by reconstituting the whole thylakoid membrane into a patterned substrate-supported planer bilayer. A mixture of thylakoid membrane purified from spinach leaves and synthetic phospholipid 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) vesicles spontaneously formed a laterally continuous and fluid two-dimensional (2D) membrane in the scaffold of the patterned polymeric bilayer. Chlorophyll fluorescence arising from photosystem II (PSII) recovered after photobleaching, suggesting that the membrane components are laterally mobile. The reversible changes of chlorophyll fluorescence in the presence of the electron acceptors and/or inhibitors indicated that the electron transfer activity of PSII was retained. Furthermore, we confirmed the electron transfer activity of photosystem I (PSI) by observing the generation of nicotinamide adenine dinucleotide phosphate (NADPH) in the presence of water-soluble ferredoxin and ferredoxin-NADP+ reductase. The lateral mobility of membrane-bound molecules and the functional reconstitution of major photosystems provide evidence that our hybrid thylakoid membranes could be an excellent experimental platform to study the 2D molecular organization and machinery of photosynthesis.Last, American Chemical Society (ACS), Jun. 2020, Langmuir, 36(21) (21), 5863 - 5871, English, International magazine[Refereed]Scientific journal
- The visual photopigment protein rhodopsin (Rh) is a typical G protein-coupled receptor (GPCR) that initiates the phototransduction cascade in retinal disk membrane of rod-photoreceptor cells. Rh molecule has a tendency to form dimer, and the dimer tends to form rows, which is suggested to heighten phototransduction efficiency in single-photon regime. In addition, the dimerization confers Rh an affinity for lipid raft, i.e. raftophilicity. However, the mechanism by which Rh-dimer raftophilicity contributes to the organization of the higher order structure remains unknown. In this study, we performed coarse-grained molecular dynamics simulations of a disk membrane model containing unsaturated lipids, saturated lipids with cholesterol, and Rh-dimers. We described the Rh-dimers by two-dimensional particle populations where the palmitoyl moieties of each Rh exhibits raftophilicity. We simulated the structuring of Rh in a disk for two types of Rh-dimer, i.e., the most and second most stable Rh dimers, which exposes the raftophilic regions at the dimerization-interface (H1/H8 dimer) and two edges away from the interface (H4/H5 dimer), respectively. Our simulations revealed that only the H1/H8 dimer could form a row structure. A small number of raftophilic lipids recruited to and intercalated in a narrow space between H1/H8 dimers stabilize the side-by-side interaction between dimers in a row. Our results implicate that the nano-sized lipid raft domains act as a "glue" to organize the long row structures of Rh-dimers.Public Library of Science (PLoS), Feb. 2020, PLOS ONE, 15(2) (2), e0226123 - e0226123, English, International magazine[Refereed]Scientific journal
- Phospholipid bilayers spontaneously spread on a hydrophilic substrate such as glass in aqueous solution due to the energetic gain of surface wetting. This process (self-spreading) was utilized to form a patterned model biological membrane containing reconstituted membrane proteins. A mechanically stable framework of a polymerized lipid bilayer was first generated by the lithographic polymerization of a diacetylene phospholipid. Then, natural lipid membranes (fluid bilayers) were introduced into the channels between polymeric bilayers by the self-spreading from a phospholipid reservoir. The spreading velocity could be fitted into a slope of -0.5 in a double logarithmic plot versus time due to the balance between the spreading force and resistive drag. The preformed polymeric bilayer accelerated the spreading by the energetic gain of covering hydrophobic edges with a lipid bilayer. At the same time, the domains of the polymeric bilayer obstructed spreading, and the spreading velocity linearly decreased with their fractional coverage. Above the critical coverage of ca. 50%, self-spreading was completely blocked (percolation threshold) and the fluid bilayer was confined in the polymer-free regions. Nonspecific adsorption of lipids onto the surface of polymeric bilayers was negligible, which enabled a heightened signal-to-background ratio in the reconstitution and observation of membrane proteins. Self-spread bilayers had a higher density of lipids than those formed by the spontaneous rupture of vesicles (vesicle fusion), presumably due to the continual supply of lipid molecules from the reservoir. These features give the self-spreading important advantages for preparing patterned model membranes with reconstituted membrane proteins.American Chemical Society (ACS), Nov. 2019, Langmuir, 35(45) (45), 14696 - 14703, English, International magazine[Refereed]Scientific journal
- Rhodopsin is a G protein-coupled receptor (GPCR) that initiates the phototransduction cascade in retinal disc membrane. Recent studies have suggested that rhodopsin forms highly ordered rows of dimers responsible for single-photon detection by rod photoreceptors. Dimerization is also known to confer to rhodopsin a high affinity for ordered lipids (raftophilicity). However, the role of rhodopsin organization and its raftophilicity in phototransduction remains obscure, owing to the lack of direct observation of rhodopsin dynamics and distribution in native discs. Here, we explore the single-molecule and semi-multimolecule behaviour of rhodopsin in native discs. Rhodopsin forms transient meso-scale clusters, even in darkness, which are loosely confined to the disc centre. Cognate G protein transducin co-distributes with rhodopsin, and exhibits lateral translocation to the disc periphery upon activation. We demonstrate that rhodopsin offers inherently distributed and stochastic platforms for G protein signalling by self-organizing raftophilic clusters, which continually repeat generation/extinction in the disc membrane.2019, Communications Biology, In press, 209 - 209, English, International magazine[Refereed]Scientific journal
- Elsevier BV, 2019, Biophys. J., In press(1) (1), 99 - 110, English[Refereed]Scientific journal
- Oct. 2018, Small, 14(49) (49), 1802804, EnglishNanofluidic biosensor created by bonding patterned model cell membrane and silicone elastomer with silica nanoparticles[Refereed]Scientific journal
- 脂質の挙動をありのままに再現する蛍光プローブでラフトの形成機構を解明. 京都大学プレスリリース. 2017-03-28.Sphingomyelin (SM) has been proposed to form cholesterol-dependent raft domains and sphingolipid domains in the plasma membrane (PM). How SM contributes to the formation and function of these domains remains unknown, primarily because of the scarcity of suitable fluorescent SM analogs. We developed new fluorescent SM analogs by conjugating a hydrophilic fluorophore to the SM choline headgroup without eliminating its positive charge, via a hydrophilic nonaethylene glycol linker. The new analogs behaved similarly to the native SM in terms of their partitioning behaviors in artificial liquid order-disorder phase-separated membranes and detergent-resistant PM preparations. Single fluorescent molecule tracking in the live-cell PM revealed that they indirectly interact with each other in cholesterol- and sphingosine backbone{textendash}dependent manners, and that, for ~{}10{textendash}50 ms, they undergo transient colocalization-codiffusion with a glycosylphosphatidylinositol (GPI)-anchored protein, CD59 (in monomers, transient-dimer rafts, and clusters), in CD59-oligomer size{textendash}, cholesterol-, and GPI anchoring{textendash}dependent manners. These results suggest that SM continually and rapidly exchanges between CD59-associated raft domains and the bulk PM.Rockefeller University Press, Mar. 2017, J. Cell Biol., 168, 1183 - 1204, English[Refereed]Scientific journal
- 2017, Abstracts of Papers of the American Chemical Society, 253Hybrid model membrane combining micropatterned lipid bilayer and hydrophilic polymer brush[Refereed]Scientific journal
- 2017, Langmuir, 33(23) (23), 5752 - 5759, English[Refereed]Scientific journal
- Jan. 2017, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 56(1) (1), 270 - 274, English[Refereed]Scientific journal
- Aug. 2016, LANGMUIR, 32(31) (31), 7958 - 7964, English[Refereed]Scientific journal
- Dec. 2015, BIOPHYSICAL JOURNAL, 109(11) (11), 2307 - 2316, English[Refereed]Scientific journal
- Jul. 2015, ANALYTICAL BIOCHEMISTRY, 481(1) (1), 18 - 26, English[Refereed]Scientific journal
- 生物は多様な夾雑分子が存在する環境でも標的分子を超高感度で検出できる。この能力には、生体膜の特性(流動性、非特異的吸着の抑制)が重要な役割を果たしている。我々は、高濃度に夾雑分子が存在する溶液から標的分子のみを選択的かつ高感度に計測できる技術を創出するため、ガラス基板表面にポリマー脂質膜と流動性脂質膜をパターン化形成し、厚さ数十ナノメートルのナノ空間を組み合わせた新規人工生体膜を開発した。The Surface Science Society of Japan, 2015, Abstract of annual meeting of the Surface Science of Japan, 35, 22 - 22
- 2015, Rsc Advances, 5(58) (58), 46686 - 46693, English[Refereed]Scientific journal
- 2015, RSC ADVANCES, 5(2) (2), 1507 - 1513, English[Refereed]Scientific journal
- Jun. 2014, FEBS JOURNAL, 281(11) (11), 2597 - 2612, English[Refereed]Scientific journal
- May 2014, ADVANCED POWDER TECHNOLOGY, 25(3) (3), 1147 - 1154, English[Refereed]Scientific journal
- The Biophysical Society of Japan General Incorporated Association, 2014, Seibutsu Butsuri, 54(1) (1), S119, English
- The Biophysical Society of Japan General Incorporated Association, 2014, Seibutsu Butsuri, 54(1) (1), S229, English
- The Biophysical Society of Japan General Incorporated Association, 2014, Seibutsu Butsuri, 54(1) (1), S232, English
- 2014, ANALYTICAL METHODS, 6(7) (7), 2117 - 2124, English[Refereed]Scientific journal
- May 2013, Langmuir, 29(21) (21), 6404 - 6408, English[Refereed]Scientific journal
- Feb. 2013, LANGMUIR, 29(8) (8), 2722 - 2730, English[Refereed]Scientific journal
- The Biophysical Society of Japan General Incorporated Association, 2013, Seibutsu Butsuri, 53(1) (1), S140, English
- 2013, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 15(23) (23), 8929 - 8939, English[Refereed]Scientific journal
- Sep. 2012, BIOMEDICAL OPTICS EXPRESS, 3(9) (9), 2012 - 2020, English[Refereed]Scientific journal
- Sep. 2012, BIOCHEMISTRY, 51(35) (35), 6908 - 6919, English[Refereed]Scientific journal
- Jun. 2012, ANALYTICAL CHEMISTRY, 84(12) (12), 5292 - 5297, English[Refereed]Scientific journal
- Jun. 2012, LANGMUIR, 28(25) (25), 9649 - 9655, English[Refereed]Scientific journal
- Mar. 2012, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 243, EnglishSurface functionalization of polymeric lipid bilayers for coupling a model membrane with molecules, cells, and 3D objects[Refereed]
- The Biophysical Society of Japan General Incorporated Association, 2012, Seibutsu Butsuri, 52, S168 - S169, English
- Jan. 2012, ANALYTICAL CHEMISTRY, 84(1) (1), 155 - 160, English[Refereed]Scientific journal
- Dec. 2011, JOURNAL OF PHYSICAL CHEMISTRY B, 115(50) (50), 14991 - 15001, English[Refereed]Scientific journal
- Oct. 2011, LANGMUIR, 27(20) (20), 12515 - 12520, English[Refereed]Scientific journal
- Jun. 2011, JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 221(2-3) (2-3), 261 - 267, English[Refereed]Scientific journal
- Apr. 2011, ANALYTICAL CHEMISTRY, 83(8) (8), 2956 - 2963, English[Refereed]Scientific journal
- Dec. 2010, DRUG METABOLISM AND DISPOSITION, 38(12) (12), 2110 - 2116, English[Refereed]Scientific journal
- Dec. 2010, COLLOIDS AND SURFACES B-BIOINTERFACES, 81(2) (2), 447 - 451, English[Refereed]Scientific journal
- Nov. 2010, TALANTA, 83(1) (1), 61 - 65, English[Refereed]Scientific journal
- Sep. 2010, CRYSTAL GROWTH & DESIGN, 10(9) (9), 4030 - 4037, English[Refereed]Scientific journal
- Mar. 2010, LANGMUIR, 26(6) (6), 4126 - 4129, English[Refereed]Scientific journal
- Feb. 2010, APPLIED OPTICS, 49(5) (5), 887 - 891, English[Refereed]Scientific journal
- 2010, Abstracts of Papers of the American Chemical Society, 240Specific protein binding on phospholipid bilayer array corralled by nonfouling polymer brushes[Refereed]Scientific journal
- 2010, BRAIN TECHNO NEWS, 142, 21-25, Japanese食品の安全性評価へのバイオセンサーの利用[Refereed]Scientific journal
- 2010, Soft Matter, 6(23) (23), 5937 - 5943, English[Refereed]Scientific journal
- The Biophysical Society of Japan General Incorporated Association, 2009, Seibutsu Butsuri, 49, S181, English
- Jan. 2009, LANGMUIR, 25(1) (1), 345 - 351, English[Refereed]Scientific journal
- Aug. 2008, BIOPHYSICAL JOURNAL, 95(3) (3), 1226 - 1238, English[Refereed]Scientific journal
- May 2008, JOURNAL OF BIOSCIENCE AND BIOENGINEERING, 105(5) (5), 527 - 535, English[Refereed]Scientific journal
- Mar. 2008, MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS, 28(2) (2), 280 - 288, English[Refereed]Scientific journal
- Dec. 2007, BIOCHEMISTRY, 46(51) (51), 15009 - 15017, English[Refereed]Scientific journal
- Nov. 2007, LANGMUIR, 23(24) (24), 12254 - 12260, English[Refereed]Scientific journal
- Apr. 2007, BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, 355(4) (4), 926 - 931, English[Refereed]Scientific journal
- Apr. 2007, JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A, 81A(1) (1), 103 - 112, English[Refereed]Scientific journal
- The Biophysical Society of Japan General Incorporated Association, 2007, Seibutsu Butsuri, 47, S178, English
- The Biophysical Society of Japan General Incorporated Association, 2007, Seibutsu Butsuri, 47, S177, English
- The Biophysical Society of Japan General Incorporated Association, 2007, Seibutsu Butsuri, 47, S178, English
- Jan. 2007, BIOPHYSICAL JOURNAL, 577A - 577A, EnglishEffects of fusogenic peptides on substrate supported planar lipid bilayers.[Refereed]
- Jan. 2007, COLLOIDS AND SURFACES B-BIOINTERFACES, 54(1) (1), 118 - 123, English[Refereed]Scientific journal
- Nov. 2006, JOURNAL OF BIOLOGICAL CHEMISTRY, 281(44) (44), 33677 - 33683, English[Refereed]Scientific journal
- The Biophysical Society of Japan General Incorporated Association, 2005, Seibutsu Butsuri, 45, S138, Japanese
- The Biophysical Society of Japan General Incorporated Association, 2005, Seibutsu Butsuri, 45, S263, Japanese
- The Biophysical Society of Japan General Incorporated Association, 2005, Seibutsu Butsuri, 45, S263, Japanese
- The Biophysical Society of Japan General Incorporated Association, 2004, Seibutsu Butsuri, 44, S82, Japanese
- The Biophysical Society of Japan General Incorporated Association, 2002, Seibutsu Butsuri, 42(2) (2), S35, Japanese
- Abstract The biological membrane is a dynamic supramolecular architecture that plays vital roles in the cell. However, understanding the physicochemical properties and functions of the membrane supramolecular system is difficult. We have developed an integrated model system of the biological membrane comprising patterned polymeric and natural lipid bilayers. The polymeric bilayer acts as a framework to support embedded natural membranes. The embedded natural membranes retain important characteristics of the biological membrane such as fluidity, and reproduces the physical states and functions of the biological membrane. Membrane proteins can be reconstituted into the model membrane for analyzing their functions in a controlled lipid membrane environment. Three-dimensional structures can be constructed by attaching micro-/nano-fabricated structures to the polymeric bilayer framework. The integrated model membrane realizes a versatile platform to study membrane functions, and should open new opportunities in fundamental biological sciences as well as biomedical/analytical applications.Corresponding, IOP Publishing, 01 Apr. 2024, Japanese Journal of Applied Physics, 63(4) (4), 040801 - 040801, English[Refereed][Invited]Introduction scientific journal
- Lead, Feb. 2021, 膜, 46, 65 - 40, Japanese光重合性リン脂質と天然リン脂質を組み合わせたパターン化人工膜による生体膜機能の再構成と応用[Refereed][Invited]Introduction scientific journal
- Lead, Jan. 2021, Analytical Sciences, 37, EnglishSubstrate-supported model membrane as a versatile analytical/ biosensing platform[Refereed][Invited]Introduction scientific journal
- Lead, Jul. 2019, 生物物理, 59(4) (4), 188 - 191, Japaneseパターン化人工膜を用いた生体膜機能の解析[Refereed][Invited]Introduction scientific journal
- One of the main questions in the membrane biology is the functional roles of membrane heterogeneity and molecular localization. Although segregation and local enrichment of protein/lipid components (rafts) have been extensively studied, the presence and functions of such membrane domains still remain elusive. Along with biochemical, cell observation, and simulation studies, model membranes are emerging as an important tool for understanding the biological membrane, providing quantitative information on the physicochemical properties of membrane proteins and lipids. Segregation of fluid lipid bilayer into liquid-ordered (Lo) and liquid-disordered (Ld) phases has been studied as a simplified model of raft in model membranes, including giant unilamellar vesicles (GUVs), giant plasma membrane vesicles (GPMVs), and supported lipid bilayers (SLB). Partition coefficients of membrane proteins between Lo and Ld phases were measured to gauze their affinities to lipid rafts (raftophilicity). One important development in model membrane is patterned SLB based on the microfabrication technology. Patterned Lo/Ld phases have been applied to study the partition and function of membrane-bound molecules. Quantitative information of individual molecular species attained by model membranes is critical for elucidating the molecular functions in the complex web of molecular interactions. The present review gives a short account of the model membranes developed for studying the lateral heterogeneity, especially focusing on patterned model membranes on solid substrates.Oct. 2018, Biochim. Biophys. Acta - Biomembranes, 1860(10) (10), 2012 - 2017, English, International magazine[Refereed]Introduction scientific journal
- May 2016, 表面科学, 37(5) (5), 230 - 234, Japanese[Refereed][Invited]Introduction scientific journal
- Oct. 2015, 高分子, 64(10) (10), 653 - 654, Japanese光重合性脂質を用いたパターン化モデル生体膜の創製[Invited]Introduction scientific journal
- Substrate supported phospholipid bilayers are model systems of the biological membrane that offer possibilities for integration (micro-patterning) and sensitive analyses. We developed hybrid membranes composed of polymerized and fluid bilayers. Since the polymeric bilayer provides a robust framework for incorporating various types of lipid membranes, it can be applied to study the functions of membrane-bound proteins and peptides. Amyloid fibril formation has been studied using micro-patterned supported membrane. Since the hybrid membranes are both stable and functional, they should provide a new avenue for generating robust model systems for the basic study of membrane functions as well as biomedical applications.THE MEMBRANE SOCIETY OF JAPAN, Nov. 2012, Membrane, 37(6) (6), 276 - 281, Japanese[Refereed]Introduction scientific journal
- 日本表面科学会, 10 Apr. 2009, Journal of the Surface Science Society of Japan, 30(4) (4), 207 - 218, Japanese
- Jun. 2008, BIOINTERPHASES, 3(2) (2), FA85 - FA89, English[Refereed]Introduction scientific journal
- (一社)日本生物物理学会, Nov. 2007, 生物物理, 47(Suppl.1) (Suppl.1), S178 - S178, English膜融合ペプチドにより引き起こされるリポソームと脂質平面膜の相互作用の全反射蛍光顕微鏡観察(The effect of membrane fusion peptides on interactions between liposomes and supported planar lipid bilayers: TIRF observations)
- (一社)日本生物物理学会, Nov. 2007, 生物物理, 47(Suppl.1) (Suppl.1), S178 - S178, English流動性脂質およびポリマー脂質からなる基板支持型コンポジット二分子膜(Composite membranes of fluid and polymerized phospholipid bilayers on solid substrate)
- Apr. 2007, CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, 12(2) (2), 75 - 80, English[Refereed]Book review
- Jan. 2007, BIOPHYSICAL JOURNAL, 422A - 422A, EnglishSurfactant assisted formation of substrate supported planar lipid bilayersSummary international conference
- Others, 技術情報協会, Jul. 2014, Japanese, 固体基板表面に形成された人工生体膜の特性と応用展開生物模倣技術と新材料・新製品開発への応用Scholarly book
- Others, Pan Stanford Publishing, May 2012, English, Micropatterned model biological membranes on a solid surfaceHandbook of Biofunctional SurfacesScholarly book
- Others, 農研機構 生研センター, 2010, Japanese, 食品の安全性評価へのバイオセンサーの利用BRAIN TECHNO NEWS 142Scholarly book
- Others, Elsevier 9, 2009, English, Micropatterned lipid bilayer membranes on solid substratesAdvances in Planar Lipid Bilayers andLiposomesScholarly book
- 第32回光合成セミナー2025:反応中心と色素系の多様性, Jun. 2025, Japanese基板表⾯におけるチラコイド膜のパターン化再構成Oral presentation
- 日本膜学会第47年会, Jun. 2025, Japaneseパターン化脂質膜とナノ空間を融合した人工生体膜の創成Public discourse
- 化学とマイクロ・ナノシステム学会 第51回研究会(CHEMINAS 51), May 2025, Japanese人工膜とナノ空間を用いた生体分子・膜小胞解析技術の開発Poster presentation
- American chemical society spring 2025(ACS Spring 2025), Mar. 2025, English, International conferenceModel membrane arrays generated by self-spreading of lipid bilayers in a polymerized lipid bilayer frameworkOral presentation
- American chemical society spring 2025(ACS Spring 2025), Mar. 2025, English, International conferenceReconstitution of rhodopsin photoreceptor into a supported lipid bilayer using peptide nanodiscOral presentation
- American chemical society spring 2025(ACS Spring 2025), Mar. 2025, English, International conferenceBiomimetic membrane system composed of patterned lipid bilayers and nanometer-sized fluidic channels[Invited]Invited oral presentation
- Biophysical Society2025(BPS2025), Feb. 2025, English, International conferenceRECONSTITUTION AND ANALYSIS OF MEMBRANE PROTEINS IN A MICRO-PATTERNED MODEL MEMBRANE[Invited]Invited oral presentation
- First International Core-to-Core Symposium on BiomembraneMolecular Machinery, Dec. 2024, English, International conferenceNew studies on biomembranemolecular machinery[Invited]Invited oral presentation
- 第59回分子ロボティクス研究会, Dec. 2024, Japanese, Domestic conference生体膜の2次元液体と微小空間を再現する集積化人工膜の開発[Invited]Invited oral presentation
- Symposium on “Engineering Science of Membranes and Particles, Oct. 2024, English, International conferenceSpontaneous formation of supported lipid membranes for generating a model biological membrane array[Invited]Invited oral presentation
- PRiME 2024, Oct. 2024, English, International conferenceIntegrated Model System of the Biological Membrane on Solid Surface[Invited]Invited oral presentation
- 岐阜大学・神戸大学・国立がん研究センター 生体膜研究交流会, Sep. 2024, Japanese, Domestic conference拠点形成事業「生体膜の分子機構を理解し活用するための国際研究拠点形成」の紹介[Invited]Invited oral presentation
- 2nd Asia-Oceania International Congress on Photosynthesis (2nd AOICP), Sep. 2024, English, International conferenceReconstitution of thylakoid membrane in a patterned polymeric lipid bilayer scaffoldOral presentation
- Glyco-core Symposium 2024, Jul. 2024, English, International conferenceMembrane binding and regulation of a secreted glycoprotein Wnt studied using a micro-patterned model membranePoster presentation
- 日本光合成学会, Jun. 2024, Japanese, Domestic conference基板表⾯におけるチラコイド膜の再構成Poster presentation
- 日本光合成学会, Jun. 2024, Japanese, Domestic conference光重合性脂質(Diyne-PC)を光収穫層とするエネルギー移動系の構築Poster presentation
- IUPAB2024, Jun. 2024, English, International conferenceReconstituting G protein-coupled receptors into a supported lipid bilayer using meta-stable peptide nanodiscsPoster presentation
- IUPAB2024, Jun. 2024, English, International conferenceIntegrated model membrane arrays generated by self-spreading of lipid bilayersPoster presentation
- IUPAB2024, Jun. 2024, English, International conferenceNanofluidic model cell membrane platform for molecular analysis of membrane-bound proteinsPoster presentation
- 化学とマイクロ・ナノシステム学会 第49回研究会(CHEMINAS 49), Jun. 2024, Japanese, Domestic conference人工生体膜とナノ空間を利用した一分子計測技術の開発Poster presentation
- ACS Spring 2024, Mar. 2024, English, International conferenceModel biological membrane composed of patterned lipid bilayer and nanometer-sized confinement[Invited]Invited oral presentation
- 若手フロンティア研究会2023, Dec. 2023, Japanese, Domestic conferenceNanofluidic supported model cell membrane for single molecular analysis of membrane-bound proteinsPoster presentation
- 若手フロンティア研究会2023, Dec. 2023, Japanese, Domestic conference支持脂質二分子膜にGPCR を配向性を制御して組み込むPoster presentation
- 若手フロンティア研究会2023, Dec. 2023, Japanese, Domestic conferenceModel Membrane Arrays Prepared by Self-Spreading of Lipid Bilayers in Preformed Polymeric Lipid Bilayer ChannelsPoster presentation
- 16th International Symposium on Nanomedicine (ISNM2023), Nov. 2023, English, International conferenceModel Membrane Arrays Prepared by Self-Spreading of Lipid Bilayers in Preformed Polymeric Lipid Bilayer ChannelsPoster presentation
- 16th International Symposium on Nanomedicine (ISNM2023), Nov. 2023, English, International conferenceSurface Modification of PDMS with Amphiphilic Random Copolymer for Nanofluidic DevicesPoster presentation
- 36th International Microprocesses and Nanotechnology Conference (MNC 2023), Nov. 2023, English, International conferenceLipid Membrane Micro and Nanotechnology[Invited]Invited oral presentation
- 第61回日本生物物理学会年会, Nov. 2023, English, Domestic conferenceSelf-spreading lipid bilayers in preformed polymeric lipid bilayer channelsPoster presentation
- 第61回日本生物物理学会年会, Nov. 2023, English, Domestic conferenceA biomimetic molecular recognition platform based on functionalized lipid bilayer membranePoster presentation
- 第61回日本生物物理学会年会, Nov. 2023, English, Domestic conferenceCharacterization of artificial thylakoid membrane supported by 2-D lattice of polymerized lipid bilayer by Cryogenic spectral microscopyPoster presentation
- 第61回日本生物物理学会年会, Nov. 2023, English, Domestic conferenceSingle molecular diffusion process of G protein transducin on rhodopsin dimer rowsPoster presentation
- 第61回日本生物物理学会年会, Nov. 2023, English, Domestic conferenceReconstituting GPCR into supported lipid bilayer with controlled orientation. [I] Prebinding of the G protein transducinPoster presentation
- 第61回日本生物物理学会年会, Nov. 2023, English, Domestic conference支持脂質二層膜にGPCR を方向性を制御して組込む [II] GPCR のC 末特異性Fab´を使ってOral presentation
- 第61回日本生物物理学会年会, Nov. 2023, English, Domestic conference人工膜とナノ空間を用いた膜結合分子の動的挙動の計測Oral presentation
- 第61回日本生物物理学会年会, Nov. 2023, English, Domestic conference膜タンパク質の一分子解析のためのナノフルイディクス基板支持モデル細胞膜Oral presentation
- First International STIMULUS Conference(9/28.29), Sep. 2023, English, International conferenceSELF-SPREADING OF LIPID BILAYERS IN PREFORMED POLYMERIC LIPID BILAYER CHANNELSPoster presentation
- First International STIMULUS Conference, Sep. 2023, English, International conferenceSurface Modification of PDMS with Amphiphilic Random Copolymer for Nanofluidic DevicesPoster presentation
- 13th International Congress on Membranes and Membrane Processes (ICOM2023), Jul. 2023, English, International conferenceSelf-spreading lipid bilayers in preformed polymeric lipid bilayer channelsPoster presentation
- 13th International Congress on Membranes and Membrane Processes (ICOM2023), Jul. 2023, English, International conferenceModel biological membrane combining patterned lipid bilayer and nanometer-sized confinementOral presentation
- 生体膜デザインコンファレンス, Dec. 2022, Japanese, Domestic conferenceパターン化脂質膜とナノ空間を融合したモデル生体膜[Invited]Keynote oral presentation
- 第95回日本生化学会大会, Nov. 2022, English, Domestic conferenceパターン化モデル生体膜を用いた膜タンパク質[Invited]Invited oral presentation
- 第60回日本生物物理学会年会, Sep. 2022, English, Domestic conferenceMicropatterned model membrane composed of polymerized and natural lipid bilayers[Invited]Invited oral presentation
- 第60回日本生物物理学会年会, Sep. 2022, English, Domestic conferencePatterned monolayer/bilayer hybrid membrane composed of polymerized and natural lipidsPoster presentation
- 第60回日本生物物理学会年会, Sep. 2022, English, Domestic conferenceSingle molecule observation of G protein transducin on rhodopsin cluster by high-speed AFMPoster presentation
- 第60回日本生物物理学会年会, Sep. 2022, English, Domestic conferenceReconstitution of photoreceptor rhodopsin into a patterned model membrane using peptide nanodiscPoster presentation
- 第60回日本生物物理学会年会, Sep. 2022, English, Domestic conferenceReconstitution of exosomes into a patterned model membranePoster presentation
- 第60回日本生物物理学会年会, Sep. 2022, English, Domestic conferenceActin network assembly on a patterned model membranePoster presentation
- ACS spring 2022, Mar. 2022, EnglishHybrid membrane of reconstituted thylakoid membrane and patterned polymeric lipid bilayer scaffold[Invited]Invited oral presentation
- 第59回日本生物物理学会年会, Nov. 2021, English, Domestic conferenceReconstitution of thylakoid membrane in a patterned model membraneOral presentation
- 第59回日本生物物理学会年会, Nov. 2021, English, Domestic conferenceFunctional reconstitution of dopamine D2 receptor into a supported model membrane in aOral presentation
- 第59回日本生物物理学会年会, Nov. 2021, English, Domestic conferenceReconstitution of rhodopsin into a patterned model membrane using nanodisc formed fromOral presentation
- ACS spring 2021 Web開催, Apr. 2021, English, International conferenceFunctional reconstitution of dopamine D2 receptor into a supported model membrane in a nanometric confinementPoster presentation
- ACS spring 2021 Web開催, Apr. 2021, English, International conferenceModel biological membrane reconstituted in a nanometric space[Invited]Invited oral presentation
- 日本化学会 第101春季年会 Web開催, Mar. 2021, Japanese人工膜とナノ空間を用いた細胞膜構造の再構成と機能解析[Invited]Invited oral presentation
- The 58th Annual Meeting of the Biophysical Society of Japan, Sep. 2020, English, Japan, Domestic conferenceLateral diffusion in lipid bilayers biased by optical forcesPoster presentation
- The 58th Annual Meeting of the Biophysical Society of Japan, Sep. 2020, English, Japan, Domestic conferenceRelationship between function and dynamics of rhodopsin using normal mode analysisPoster presentation
- The 58th Annual Meeting of the Biophysical Society of Japan, Sep. 2020, EnglishDynamic process of G protein transducin on rhodopsin cluster observed by high-speed AFMPoster presentation
- The 58th Annual Meeting of the Biophysical Society of Japan, Sep. 2020, English, Japan, Domestic conferenceInvestigation of relationships between amyloid fibril formation and phospholipid bilayer destructionPoster presentation
- ACS National meeting & Expo WEB開催, Mar. 2020, English, Pennsylvania Convention Center, International conferenceHybrid photosynthetic system of natural plant thylakoids and synthetic lipids reconstituted into a supported microscale membrane arrayInvited oral presentation
- 光・量子デバイス研究会, Jan. 2020, Japanese, 姫路・西はりま地場産業センター, Domestic conferenceパターン化人工膜への膜タンパク質の再構成Oral presentation
- Okinawa Colloids 2019, Nov. 2019, English, 沖縄 万国津梁館, International conferencePatterned model biological membrane on the solid substrate:Potenti als for biophysical studies and biomedical applications[Invited]Invited oral presentation
- シンポジウム「理論と実験」2019, Oct. 2019, Japanese, 広島大学, Domestic conferencePhosphorylatedion of rhodopsin photoreceptor and arrestin binding studied in a patterned model membrane.Poster presentation
- 日米二国間セミナー, Oct. 2019, English, 京都国際交流会館, International conferenceReconstitution of a photosynthetic system into a two-dimensional patterned model membranePoster presentation
- 第57回日本生物物理学会年会, Sep. 2019, English, 宮崎県・シーガイヤコンベンションセンター, Domestic conferenceパターン化モデル膜を用いたロドプシンリン酸化とアレスチン結合の解析Poster presentation
- 第57回日本生物物理学会年会, Sep. 2019, English, 宮崎県・シーガイヤコンベンションセンター, Domestic conference細胞膜断片ブレブを用いたモデル生体膜への膜タンパク質再構成Poster presentation
- 第57回日本生物物理学会年会, Sep. 2019, English, 宮崎県・シーガイヤコンベンションセンター, Domestic conferenceリン酸化ロドプシン・アレスチン複合体は視細胞円板膜切れ込み部に集まるPoster presentation
- 第57回日本生物物理学会年会, Sep. 2019, English, 宮崎県・シーガイヤコンベンションセンター, Domestic conferenceロドプシンクラスター上におけるトランスデューシンの動的過程の高速AFM観察Poster presentation
- 第57回日本生物物理学会年会, Sep. 2019, English, 宮崎県・シーガイヤコンベンションセンター, Domestic conferenceインクジェット塗布を用いたパターン化人工生体膜の開発Poster presentation
- 第57回日本生物物理学会年会, Sep. 2019, English, 宮崎県・シーガイヤコンベンションセンター, Domestic conference網膜桿体細胞内円盤膜上での脂質-光受容タンパク質秩序形成の数理モデルPoster presentation
- 第57回日本生物物理学会年会, Sep. 2019, English, 宮崎県・シーガイヤコンベンションセンター, Domestic conferenceガラス基板表面におけるチラコイド膜の再構成と光合成機能解析Poster presentation
- Bio-Nano-Summer school 2019, Aug. 2019, English, Kleinwalsertal, Austria, International conferenceMicropatterned model biological membrane: Potentials for biophysicalstudies and biomedical applicationsKeynote oral presentation
- MNP Reserch Seminar, Jul. 2019, English, リーズ大学(イギリス), International conferenceMicropatterned model biological membrane: Potentials for biophysicalstudies and biomedical applicationsPublic discourse
- 第10回日本光合成学会年会およびシンポジウム, May 2019, Japanese, 京都産業大学 むすびわざ館, Domestic conferenceパターン化人工生体膜を用いた光合成機能評価技術の開発Poster presentation
- ACS Spring 2019 National Meeting & Exposition, Apr. 2019, English, Orange Convention Cente, International conferenceSelf-spreading of a phospholipid bilayer in the scaffold of polymerized lipid bilayer[Invited]Invited oral presentation
- 10th International Workshop on Nanostructures and Nanoelectronics, Mar. 2019, English, 東北大学 電気通信研究所, International conferencePatterned lipid bilayer combined with a nanometric gap structure as a versatilemodel of the biological membrane[Invited]Invited oral presentation
- Seminar, Mar. 2019, English, コーネル大学化学生物工学科, International conferenceModel Biological Membranes on a Solid Substrate:Potential for Biophysical Studies and Biomedical Applications[Invited]Invited oral presentation
- the department of Biochemistry and Cell & Developmental Biology Seminar Series, Mar. 2019, English, コーネル大学医学部, International conferenceModel Biological Membranes on a Solid Substrate:Potential for Biophysical Studies and Biomedical Applications[Invited]Invited oral presentation
- Ulm Meeting on “Biophysics of Amyloid Formation”, Feb. 2019, English, Ulm University, Germany, International conferenceEnhanced membrane disruption by Aβ1-40 under weak acidic conditionsPoster presentation
- 日本生物物理学会第56回年会, Sep. 2018, English, 岡山大学 津島キャンパス, Domestic conferenceSubstrate-supported model biological membrane with controlled two-dimensional and three-dimensional structuresPoster presentation
- 日本生物物理学会第56回年会, Sep. 2018, English, 岡山大学 津島キャンパス, Domestic conferenceSingle molecule observation of membrane proteins in a model biological membrane integrated with a nanometric gap structureOral presentation
- 日本生物物理学会第56回年会, Sep. 2018, English, 岡山大学 津島キャンパス, Domestic conferenceReconstitution and functional analysis of thylakoid membrane on a glass substrateOral presentation
- 日本生物物理学会第56回年会, Sep. 2018, English, 岡山大学 津島キャンパス, Domestic conferenceRaftophilicity and aggregation of membrane proteins in the photo-transduction[Invited]Invited oral presentation
- 日本生物物理学会第56回年会, Sep. 2018, English, 岡山大学 津島キャンパス, Domestic conferenceObserving the interaction between rhodopsin cluster and transducin by high-speed AFMPoster presentation
- 日本生物物理学会第56回年会, Sep. 2018, English, 岡山大学 津島キャンパス, Domestic conferenceDirect reconstitution of membrane proteins from cell membrane blebs into a model biological membranePoster presentation
- International Symposium on Science and Technology of MolecularAssemblies, Sep. 2018, English, 愛媛大学, International conferenceDevelopment of complex and functional model membranes on solid substrate[Invited]Invited oral presentation
- 日本生物物理学会第56回年会, Sep. 2018, English, 岡山大学 津島キャンパス, Domestic conferenceA mathematical model of pattern formation of lipid-photoreceptor proteins on disk membranes of retinal cells.Poster presentation
- 第18回日本蛋白質科学会, Jun. 2018, Japanese, 朱鷺メッセ, Domestic conference弱酸性条件におけるAβ1-40のアミロイド線維形成と脂質膜破壊Poster presentation
- Proteins in Artificial Membranes, May 2018, English, Austrian Institute of Technology, International conferenceReconstituting Membrane Proteins in a Patterned Model Membrane[Invited]Invited oral presentation
- BIOELECTROCHEMISTRY AND MORE………2018, May 2018, English, CEST, International conferencePatterned Model Biological Membrane on the Solid Substrate[Invited]Invited oral presentation
- 255th ACS National Meeting, Mar. 2018, English, Ernest N. Morial Convention Center、 New Orleans、 LA, International conferenceSingle molecule detection of biomarker in the a nanometric gap- structure combined with fluid membranejunctionOral presentation
- 255th ACS National Meeting, Mar. 2018, English, Ernest N. Morial Convention Center、 New Orleans、 LA, International conferenceRaftophilicity of membrane proteins involved in phototransduction evaluated with by using a micropatterned model membraneOral presentation
- 9th International Workshop on Nanostructures andNanoelectronics, Mar. 2018, English, 東北大学 電気通信研究所, International conferencePatterned model biological membrane on the solid substrate[Invited]Invited oral presentation
- 255th ACS National Meeting, Mar. 2018, English, Ernest N. Morial Convention Center、 New Orleans、 LA, International conferenceNanometric gap structure for selective biosensing created with patterned lipid bilayer, silicone elastomer, and silica nanoparticles[Invited]Invited oral presentation
- 2017年度生命科学系学会合同年次大会(第40回日本分子生物学会), Dec. 2017, Japanese, 神戸ポートピアホテル, Domestic conferenceパターン化人工膜を用いた膜シグナル伝達機構の再構成と定量的解析[Invited]Invited oral presentation
- 化学とマイクロ・ナノシステム学会 第36回研究会, Oct. 2017, Japanese, 桐生市市民文化会館 スカイホール, Domestic conference人工生体膜とポリマー材料を用いたナノ空間の創成Poster presentation
- 化学とマイクロ・ナノシステム学会 第36回研究会, Oct. 2017, Japanese, 桐生市市民文化会館 スカイホール, Domestic conferenceナノ空間と人工生体膜を組み合わせた1分子計測技術の開発Poster presentation
- ICBZM2017, Oct. 2017, English, 東京大学本郷キャンパス, International conferencePatterned lipid bilayer on solid substrate as a versatile model system of the biiological membrane[Invited]Invited oral presentation
- ICBZM2017, Oct. 2017, English, 東京大学本郷キャンパス, International conferenceControlling the distance between a patterned model membrane andthe substrate with polymer brushesPoster presentation
- 日本生物物理学会第55回年会, Sep. 2017, English, 熊本大学, Domestic conferenceパターン化人工膜を利用したNAP-22の膜結合と凝集挙動解析Poster presentation
- 日本生物物理学会第55回年会, Sep. 2017, English, 熊本大学, Domestic conferenceパターン化人工膜を用いた光シグナル伝達中における脂質ラフトの機能解析Poster presentation
- TETHMEM 2017, Aug. 2017, English, Schloß Schönbrunn Meetings & Events(オーストリア), International conferenceSingle-molecule immunoassay in the nanogap-junction with a fluid lipid bilayerPoster presentation
- TETHMEM 2017, Aug. 2017, English, Schloß Schönbrunn Meetings & Events(オーストリア), International conferenceRoles of lipid rafts in phototransduction studied with a micropatterned model membranePoster presentation
- BioNano Summer-School, Aug. 2017, English, Darmstädter Haus(ドイツ), International conferenceRoles of lipid rafts in phototransduction studied with a micropatterned model membraneOral presentation
- BioNano Summer-School, Aug. 2017, English, Darmstädter Haus(ドイツ), International conferenceModel membrane on a solid substrate:Crawling to grow from 2D into 3D structures[Invited]Invited oral presentation
- TETHMEM 2017, Aug. 2017, English, Schloß Schönbrunn Meetings & Events(オーストリア), International conferenceMicropatterned model membrane to elucidate the funcitonal roles of lipid micro-domains in the signal transduction cascade[Invited]Invited oral presentation
- TETHMEM 2017, Aug. 2017, English, Schloß Schönbrunn Meetings & Events(オーストリア), International conferenceMembrane binding and aggregation of neuronal acidic protein of 22kDa (NAP-22) studied with a patterned model membranePoster presentation
- TETHMEM 2017, Aug. 2017, English, Schloß Schönbrunn Meetings & Events(オーストリア), International conferenceFabricating a nanometric gap junction by attaching a patterned lipid bilayer with PDMS via polymeric materialsPoster presentation
- BioNano Summer-School, Aug. 2017, English, Darmstädter Haus(ドイツ), International conferenceFabricating a nanometric gap junction by attaching a patterned lipid bilayer with PDMS via polymeric materialsOral presentation
- TETHMEM 2017, Aug. 2017, English, Schloß Schönbrunn Meetings & Events(オーストリア), International conferenceDevelopment of model biological membranes for the functional reconstitution of membrane proteinsPoster presentation
- BioNano Summer-School, Aug. 2017, English, Darmstädter Haus(ドイツ), International conferenceDevelopment of model biological membranes for the functional reconstitution of membrane proteinsOral presentation
- TETHMEM 2017, Aug. 2017, English, Schloß Schönbrunn Meetings & Events(オーストリア), International conferenceControlling the distance between a patterned model membrane and the substrate with polymer brushesPoster presentation
- BioNano Summer-School, Aug. 2017, English, Darmstädter Haus(ドイツ), International conferenceControlling the distance between a patterned model membrane and the substrate with polymer brushesOral presentation
- 「理研シンポジウム」細胞システムの動態と論理VIII, Apr. 2017, Japanese, 理化学研究所, Domestic conference人工膜を用いた膜シグナル伝達機構の再構成と定量的解析[Invited]Invited oral presentation
- 253st ACS National Meeting and Exposition, Apr. 2017, English, San Francisco Convention Center, International conferenceSingle-molecule detection of biomarker molecules in a nanometric gapstructure with a fluid lipid membraneOral presentation
- 253st ACS National Meeting and Exposition, Apr. 2017, English, San Francisco Convention Center, International conferenceHybrid model membrane combining micropatterned lipid bilayer and hydrophilic polymer brush[Invited]Invited oral presentation
- 253st ACS National Meeting and Exposition, Apr. 2017, English, San Francisco Convention Center, International conferenceEvaluating the interactions of lipid raft and proteins involved inphototransduction by using a micropatterned model membraneOral presentation
- 講演会, Mar. 2017, English, Sandia National Laboratories, International conferencePatterned lipid bilayer on solid substrate as a versatile model systemof the biological membrane[Invited]Invited oral presentation
- 8th International Workshop on Nanostructures & Nanoelectronics, Mar. 2017, English, 東北大学, International conferenceNanogap-junction with a fluid lipid bilayer for selective biosensing[Invited]Invited oral presentation
- 第54回日本生物物理学会, Nov. 2016, English, つくば国際会議場, Domestic conference人工生体膜とナノ空間を利用した1分子計測技術の開発Poster presentation
- 第54回日本生物物理学会, Nov. 2016, English, つくば国際会議場, Domestic conference親水性高分子により基板との距離を制御した人工膜への膜タンパク質再構成Poster presentation
- 第54回日本生物物理学会, Nov. 2016, English, つくば国際会議場, Domestic conference視細胞円板膜上のロドプシン多量対クラスターが作る一過性メゾ領域[Invited]Invited oral presentation
- 第54回日本生物物理学会, Nov. 2016, English, つくば国際会議場, Domestic conferenceパターン化人工膜を利用したNAP-22 の膜結合と凝集挙動解析Poster presentation
- 第54回日本生物物理学会, Nov. 2016, English, つくば国際会議場, Domestic conferenceパターン化人工膜を用いて脂質ラフトによる光シグナル伝達の制御機構を解明するPoster presentation
- the 251st ACS National Meeting & Exposition, Mar. 2016, English, San Diego Convention Center, International conferenceEvaluating the raftophilicity of rhodopsin in a patterned model membrane[Invited]Invited oral presentation
- 2015年真空・表面科学合同講演会, Dec. 2015, Japanese, つくば国際会議場, Domestic conferenceパターン化脂質膜とナノ空間を融合した新規人口生体膜の創出[Invited]Invited oral presentation
- Pacifichem 2015, Dec. 2015, English, ハワイコンベンションセンター, International conferenceSolid-state NMR and microscopic studies of synthetic mimic of GPI-anchored proteinsPoster presentation
- Pacifichem 2015, Dec. 2015, English, ハワイコンベンションセンター, International conferenceNanometic gap structure for the selective transport and detection of biological moleculesPoster presentation
- Pacifichem 2015, Dec. 2015, English, ハワイコンベンションセンター, International conferenceEvaluating the raftophilicity of rhodopsin in a patterned model membranePoster presentation
- 国際シンポジウム「TethMem 2015」, Nov. 2015, English, Nanyang Technological University (シンガポール), International conferenceMocro-/Nano-Compartments Between Substrate-Sopported Model Membrane and Silisone Elastomer[Invited]Invited oral presentation
- 国際シンポジウム「TethMem 2015」, Nov. 2015, English, Nanyang Technological University (シンガポール), International conferenceHybrid model membrane combining micropatterned lipid bilayer andpolymer brushesPoster presentation
- 第53回日本生物物理学会年会, Sep. 2015, English, 金沢大学 角間キャンパス, Domestic conferenceパターン化モデル生体膜を用いた、光シグナル伝達に関わる膜タンパク質の脂質ラフト親和性解析Oral presentation
- 第53回日本生物物理学会年会, Sep. 2015, English, 金沢大学 角間キャンパス, Domestic conferenceロドプシンはラフト親和性の短寿命ナノドメインを形成しながら拡散しているPoster presentation
- 第53回日本生物物理学会年会, Sep. 2015, English, 金沢大学 角間キャンパス, Domestic conference1分子観察によるガングリオシドのダイマー形成機構の解明Poster presentation
- 第14回ライフサイエンスワールド, May 2015, Japanese, 東京ビッグサイト, Domestic conference人工生体膜を利用した高感度生体分子計測技術Public symposium
- 249th American Chemical Society National Exposition, Mar. 2015, English, Denver, CO, International conferenceNanometric gap structure between substrate-supported model membrane and silicone elastomer[Invited]Invited oral presentation
- The Joint Symposium of 9th International Symposium on Medical, Bio- and Nano-Electronics,and6th International Workshop on Nanostructures & Nanoelectronics, Mar. 2015, English, 東北大学電気通信研究所, International conferenceMicro-nano-compartments between substrate-supported model membrane andsilicone elastomer[Invited]Invited oral presentation
- メディカルジャパン2015, Feb. 2015, Japanese, インテックス大阪, Domestic conference人工生体膜を利用した高感度生体分子計測技術Public discourse
- 日本生物物理学会 第52回年会, Sep. 2014, English, 札幌コンベンションセンター, Domestic conference脂質二分子膜と高分子材料を融合したハイブリッド型人工膜の創製Poster presentation
- 日本生物物理学会 第52回年会, Sep. 2014, English, 札幌コンベンションセンター, Domestic conferenceモデル生体膜を用いたロドプシン光受容体の脂質ラフト親和性解析Poster presentation
- 日本生物物理学会 第52回年会, Sep. 2014, English, 札幌コンベンションセンター, Domestic conferenceパターン化人工膜を用いた膜タンパク質のラフト親和性解析[Invited]Invited oral presentation
- 247th American Chemical Society National Exposition, Mar. 2014, English, Dallas Convention Center, International conferenceControlled distribution of lipids and proteins in a micropatterned model menbrane[Invited]Invited oral presentation
- 第51回日本生物物理学会年会, Oct. 2013, Japanese, 国立京都国際会館, Domestic conferenceマイクロパターン化モデル生体膜における脂質ドメインの空間的制御Poster presentation
- 第51回日本生物物理学会年会, Oct. 2013, Japanese, 国立京都国際会館, Domestic conferenceパターン化モデル生体膜へのロドプシンの再構成Poster presentation
- ソフトインターフェースの分子科学第10回公開シンポジウム, Jul. 2013, Japanese, 東京大学大学院数理科学研究科, Domestic conferenceパターン化モデル生体膜と微小構造体を接合したナノ界面における分子認識と分子輸送Poster presentation
- 日本生物物理学会 第5回中国四国支部大会, May 2013, Japanese, ベネッセハウス・パークホール, Domestic conference固体基板表面にモデル生体膜を集積化する技術の開発Oral presentation
- 第60回応用物理学会学術講演会, Mar. 2013, Japanese, 神奈川工科大学, Domestic conferenceインクジェット塗布技術を用いた人工生体膜の作製Oral presentation
- ソフトインターフェースの分子科学第9回公開シンポジウム, Jan. 2013, Japanese, タワーホテル船堀, Domestic conferenceパターン化モデル生体膜と微小構造体を接合したナノ界面における分子認識と分子輸送Oral presentation
- 第50回日本生物物理学会年会, Sep. 2012, Japanese, 名古屋大学 東山キャンパス, Domestic conference微細パターン化モデル生体膜における膜結合タンパク質の濃縮の空間的制御Oral presentation
- 第50回日本生物物理学会年会, Sep. 2012, Japanese, 名古屋大学 東山キャンパス, Domestic conferenceパターン化モデル生体膜へのロドプシンの再構成Poster presentation
- Engineering Lipid Bilayers 2012, Sep. 2012, English, Weetwood Hall, International conferenceStable and functional model biological membrane composed of polymericand fluid lipid bilayers[Invited]Invited oral presentation
- 文部科学省科学研究費補助金・新学術領域研究「ソフトインターフェースの分子科学」(略称・ソフト界面)第8回領域会議, Jul. 2012, Japanese, 伝国の杜・置賜文化ホール, Domestic conferenceパターン化モデル生体膜と微小構造体を接合したナノ界面における分子認識と分子輸送Oral presentation
- International Association of Colloid and Interface Scientists,Conference, May 2012, English, 仙台国際センター, International conferenceCoupling model cellular membranes with molecules, cells, and 3D objectsOral presentation
- 日本農芸学会2012年度大会, Mar. 2012, Japanese, 京都女子大学, Domestic conference食品の安全性評価用バイオセンシングシステムの開発[Invited]Invited oral presentation
- 243 Meeting of the American Chemical Society, Mar. 2012, English, Sun diego convention center, International conferenceSurface functionalization of polymeric lipid bilayers for coupling with molecules, cells, and 3D objects[Invited]Invited oral presentation
- 243 Meeting of the American Chemical Society, Mar. 2012, English, Sun diego convention center, International conferenceP450 microarrays fabricated in microwells by the inkjet printingOral presentation
- 第34回日本分子生物学会, Dec. 2011, Japanese, パシフィコ横浜, Domestic conferenceヒトP450発現大腸菌による食品化合物の網羅的な代謝試験Oral presentation
- 第49回日本生物物理学会年会, Sep. 2011, Japanese, 兵庫県立大学姫路書写キャンパス, Domestic conferenceパターン化脂質二分子膜へのロドプシンの再構成Oral presentation
- 第60回高分子討論会, Sep. 2011, Japanese, 岡山大学津島キャンパス, Domestic conferenceポリマー脂質二分子膜を基盤とした生体膜機能界面の創製[Invited]Invited oral presentation
- 第84回日本生化学会大会, Sep. 2011, Japanese, 国立京都国際会館, Domestic conferenceシトクロムP450と酵素センサーを積層化したP450マイクロアレイの開発Poster presentation
- 第84回日本生化学会大会, Sep. 2011, Japanese, 国立京都国際会館, Domestic conferenceインクジェット技術によるP450マイクロアレイ作製とケージド補酵素を用いた活性測定Poster presentation
- 日本農芸学会2011年度大会, Mar. 2011, Japanese, 日本農芸学会, 京都女子大, Domestic conferenceクロルピリホス代謝に見られるヒトCYP2B6遺伝子多型の影響Poster presentation
- 241st Meeting of the American Chemical Society, Mar. 2011, English, Anaheim Convention Center, International conferenceModel biological membranes composed of polymerized and fluid lipid bilayers[Invited]Invited oral presentation
- BMB2010(第33回日本分子生物学会年会・第83回日本生化学会大会 合同大会), Dec. 2010, Japanese, 神戸国際展示場, Domestic conference微細加工チップを用いたシトクロムP450代謝活性測定技術Poster presentation
- BMB2010(第33回日本分子生物学会年会・第83回日本生化学会大会 合同大会), Dec. 2010, Japanese, 神戸国際展示場, Domestic conferenceヒトシトクロムP450 2A13 および2B6 によるフラノクマリン類の代謝Poster presentation
- BMB2010(第33回日本分子生物学会年会・第83回日本生化学会大会 合同大会), Dec. 2010, Japanese, 神戸国際展示場, Domestic conferenceヒトP450 を組込んだ新規薬物動態評価用バイオセンサーの開発[Invited]Nominated symposium
- 第36回 日本生体エネルギー研究会&特定領域研究「革新的ナノバイオ」合同シンポジウム, Nov. 2010, Japanese, 大阪大学吹田キャンパス銀杏会館, Domestic conferenceパターン化モデル生体膜を利用した膜タンパク質再構成技術の開発Poster presentation
- 日本薬物動態学会第25回年会, Oct. 2010, English, 大宮ソニックシティー, Domestic conferenceMetabolic Activation of 5-Methoxypsoralen by Human CYP2A13 Variants Representing Single NucleotiedPoster presentation
- 日本生物物理学会第48回年会, Sep. 2010, English, 日本生物物理学会, 東北大学川内北キャンパス, Domestic conferenceImmobilization of cytochrome P450 on the solid surfacePoster presentation
- 日本生物物理学会第48回年会, Sep. 2010, English, 日本生物物理学会, 東北大学川内北キャンパス, Domestic conferenceFormation of substrate supported planar phospholipid bilayers in the presence of detergentsPoster presentation
- Soft Matter Physics 2010, Aug. 2010, English, 東京大学柏キャンパス, Domestic conferenceComposite membranes of polymeric and fluid lipid bilayers[Invited]Invited oral presentation
- 本特定領域研究の第5回班会議「膜超分子モーターの革新的ナノサイエンス」, Jun. 2010, Japanese, 学習院大学創立百周年記念館, Domestic conferenceパターン化モデル生体膜を利用した膜タンパク質再構成技術の開発Oral presentation
- Biophysical Society 54th Annual Meeting, Feb. 2010, English, San FranciscoThe Moscone Center, International conferenceMicropatterned model membranes composed of polymerized and fluid lipid bilayersPoster presentation
- 第14回情報バイオトロニクス研究会, Jan. 2010, Japanese, 東北大学, Domestic conference固体基板表面におけるパターン化モデル生体膜の開発[Invited]Invited oral presentation
- 生物物理学会第47回年会, Nov. 2009, English, 徳島文理大学, Domestic conference固体基板上でパターン化された脂質膜におけるリン脂質膜の収縮Poster presentation
- 生物物理学会第47回年会, Nov. 2009, English, 徳島文理大学, Domestic conference界面活性剤を用いたリン脂質膜の固体基板への固定化手法Oral presentation
- 薬物動態学会第24回年会, Nov. 2009, English, 国立京都国際会議場, Domestic conferenceHigh-throughput Assay of Human P450 Activities by Using Immobilized Microsomes on Oxygen SensorOral presentation
- 第82回日本生化学会大会, Oct. 2009, Japanese, 神戸ポートアイランド, Domestic conferenceヒトCYP2A13による食物由来成分の代謝における遺伝子多型の影響Oral presentation
- 第82回日本生化学会大会, Oct. 2009, Japanese, 神戸ポートアイランド, Domestic conferenceシトクロムP450遺伝子多型CYP2C9*2とCYP2C9*3が食品酸化に与える影響Oral presentation
- 第82回日本生化学会大会, Oct. 2009, Japanese, 神戸国際展示場, Domestic conferenceケージド化合物を用いたP450酵素活性の光制御Poster presentation
- 第82回日本生化学会大会, Oct. 2009, Japanese, 神戸ポートアイランド, Domestic conferenceCYP1A1の遺伝子多型による食品成分の代謝活性変化Oral presentation
- アドバンスセミナー 生物機能とナノテクノロジー メルシャン株式会社生物資源研究所, Aug. 2009, Japanese, メルシャン株式会社生物資源研究所, Domestic conferenceHigh-throughput Assay of Human P450 Activities by Using Immobilized Microsomes on Oxygen SensorPoster presentation
- American Chemical Society 237th National Meeting, Mar. 2009, English, (Salt Lake City), International conferenceInduction of phase separation in micropatterned composite membranes of polymerized and fluid lipid bilayers[Invited]Invited oral presentation
- ナノテク2009, Feb. 2009, Japanese, 東京ビッグサイト, Domestic conference集積型人工生体膜Poster presentation
- 日本農芸化学会関西支部例会(第458回講演会), Feb. 2009, Japanese, 京大会館, Domestic conferenceヒト薬物代謝酵素シトクロムP450を基板表面に固定化したバイオセンサーの開発Oral presentation
- Asian Core Symposium-Nano and Biomedical Molecular Science, Feb. 2009, Japanese, (岡崎), Domestic conferenceMicropatterned phospholipid membranes on solid substrate as a platform for biotechnological and biomedical applications[Invited]Invited oral presentation
- The 3rd Workshop on Biological Applications of Plasma/Photon Processing, Jan. 2009, Japanese, Institute of Laser Engineering, Osaka University, Domestic conferenceModel biological membranes on solid substrates[Invited]Invited oral presentation
- 日本農芸化学会関西支部例会(第457回講演会), Dec. 2008, Japanese, Domestic conferenceヒトP450分子種、CYP2C18を発現した大腸菌による食品成分の代謝分析Oral presentation
- 第31回日本分子生物学会年会・第81回日本生化学会大会合同大会 BMB2008 2008.12.9-12, Dec. 2008, Japanese, 神戸国際展示場, Domestic conferenceヒトP450酵素発現大腸菌を用いた食品成分の代謝分析Poster presentation
- 日本農芸化学会関西支部例会(第457回講演会), Dec. 2008, Japanese, Domestic conferenceヒトCYP2C9 およびCYP2C19の遺伝子多型による薬物代謝活性変化の解析Oral presentation
- 第31回日本分子生物学会年会・第81回日本生化学会大会合同大会 BMB2008 2008.12.9-12, Dec. 2008, Japanese, 神戸国際展示場, Domestic conferenceヒトCYP2C19およびCYP3A5の遺伝子多型による薬物代謝活性変化の解析Poster presentation
- 第31回日本分子生物学会年会・第81回日本生化学会大会合同大会 BMB2008 2008.12.9-12, Dec. 2008, Japanese, 神戸国際展示場, Domestic conferenceヒトCYP2C18酵素タンパク質の大腸菌内安定発現とその酵素化学的性質Poster presentation
- 第8回産学官連携フェア, Oct. 2008, Japanese, 北九州国際会議場, Domestic conference固体基板上における人工生体膜の作製Poster presentation
- JSPS-SNSF International Seminar on Membranomics, Sep. 2008, Japanese, 大阪大学 Σホール, Domestic conferenceIntegrated model biological membranes at the solid/ liquid interfaces[Invited]Invited oral presentation
- American Chemical Society 236th National Meeting, Aug. 2008, English, (Philadelphia), International conferenceMicropatterned model biological membranes composed of polymerized and fluid lipid bilayers[Invited]Invited oral presentation
- 第30回日本分子生物学会・第80回日本生化学会大会 合同大会, Dec. 2007, Japanese, パシフィコ横浜, Domestic conferenceパターン化脂質膜に固定されたチトクロムP450を用いた酵素活性アッセイ法Poster presentation
- 日本生物物理学会第45回年会, Dec. 2007, English, パシフィコ横浜, Domestic conferenceImmobilization of cytochrome P450 on micropatterned lipid bilayer substrates for the parallel assay of their activitiesPoster presentation
- 化学とマイクロ・ナノシステム学会 第51回研究会(CHEMINAS 51), Japanese人口膜とナノ空間を用いた生体分子・膜小胞解析技術の開発Poster presentation
- 日本学術振興会, 科学研究費助成事業, 基盤研究(B), 神戸大学, 01 Apr. 2024 - 31 Mar. 2027パターン化人工膜とナノ空間を用いた細胞外小胞膜の再構成と膜タンパク質の解析
- 日本学術振興会, 科学研究費助成事業, 基盤研究(B), 神戸大学, 01 Apr. 2022 - 31 Mar. 2025人工膜へのGタンパク質共役型受容体再構成法の確立
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Fund for the Promotion of Joint International Research (Fostering Joint International Research (B)), Kobe University, 07 Oct. 2021 - 31 Mar. 2025Investigation of photosynthetic machinery using patterned model membrane and nanoscopic analysis/ manipulation植物の光合成初期反応の場であるチラコイド膜は、多様な膜タンパク質群が2次元膜に配置された超分子系である。2次元膜における動的な分子分布や超分子形成は、光合成機能の調節に本質的に重要でありながら解析が困難であり充分には理解されていない。本研究は、世界的にも研究代表者のみが持つチラコイド膜のパターン化作製技術とリーズ大学の持つナノ計測・ナノ操作技術を組み合わせて、パターン化人工膜に再構成された光合成関連分子の膜内分布、エネルギー移動、電子伝達機能をナノメートルスケールで制御、定量評価する技術を開発することを目指している。初年度には、リーズ大学のDr. Peter G. Adams、Dr. Stephen D. Evansらと日本研究グループとの間でオンライン形式でのミニシンポジウムを開催し、お互いの技術を紹介するとともに今後の共同研究の進め方を詳細に議論した。また、神戸大学グループよりリーズ大学にパターン化ポリマー脂質膜およびチラコイド膜を送付して、チラコイド・脂質ハイブリッド膜の導入および電気泳動の予備実験を行った。日本国内においても、研究代表者と研究分担者(出羽、高木)の打合せおよび予備実験(導電性ガラス基板表面におけるパターン化ポリマー膜の作製)を行った。これらの検討により今後、リーズ大学と共同でチラコイド膜の動的な2次元分子分布による光合成機能調節を、人工膜を用いて再現しナノメートルスケールで詳細に解析する新規手法論を検討する準備が整った。
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Kobe University, 01 Apr. 2020 - 31 Mar. 2023Measuring molecular properties of membrane proteins using a synthetic cell micro-environment conposed of a model cell membrane and a nanometric space細胞膜の微小ドメイン構造(ラフト)は、膜タンパク質の機能調節に重要な役割を果たすと考えられている。研究代表者は、ラフト領域と非ラフト領域が明確に分かれているパターン化人工膜を用いて、膜タンパク質のラフト親和性を定量する手法を開発した。本研究は、人工膜と接する厚さ100nm以下のナノ空間に、細胞内のような高濃度のタンパク質やリガンドが存在する微小環境を再現し、それらと膜タンパク質との結合・解離を1分子蛍光観察で定量的に評価することを目的とする。2021年度には、①人工膜とナノ空間を一体化したバイオチップ作製、②パターン化人工膜への膜タンパク質の再構成、に関する技術開発を行った。 ①人工膜とナノ空間を一体化したバイオチップ作製:人工膜としては、光重合性リン脂質を光リソグラフィー技術でUV重合することでポリマー脂質膜を作製した。ナノ空間は、厚さの制御された接着層(高密度な親水性高分子鎖(高分子ブラシ)を被覆したシリカ微粒子)を用いて人工膜とPDMSを結合することで作製した。粒径100nmのナノ粒子を用いることで、流動性脂質膜部位の膜とPDMSの間に同程度の厚さを持つナノ空間が形成された。 ②パターン化人工膜への膜タンパク質の再構成:細胞由来の膜断片(blebs)を用いて、哺乳類細胞の膜タンパク質を人工膜に直接導入する技術を開発した。精神疾患に関わる重要なGPCRであるドーパミン受容体(D2R)をCHO細胞に発現し薬剤処理で膜断片を形成した。PDMSとパターン化膜との隙間(クレフト)において、区画内に高密度のD2Rが導入され、分子が2次元拡散していることを確認した。また、D2Rが生理的な活性を持つことを二量体形成寿命、アンタゴニストの結合などで示すことができた。今後、細胞小胞(エクソソーム)についてもクレフトにおける平面膜形成を検討して、膜タンパク質を1分子計測できる系を確立したい。
- 日本学術振興会, 科学研究費助成事業, 基盤研究(B), 大阪大学, 01 Apr. 2020 - 31 Mar. 2023光受容体タンパク質が形成する超分子構造とシグナル伝達の分子動態機構の解明本研究では、光受容体ロドプシン(Rh)の光照射に伴う1分子レベルでの構造変化やRhとシグナル伝達分子であるG蛋白質トランスデューシン(Gt)との相互作用動態を高速原子間力顕微鏡(高速AFM)で捉えることを目指しており、昨年度、そのためのAFM赤外光てこ光学系や暗室AFM装置環境の構築を行い、また比較的規模の大きな2量体列構造を持つRhの試料調製も行った。そこで本年度はこれらを用いて、まず光照射に伴うロドプシン(Rh)の構造変化の観察を試みた。暗所において2量体から成る列構造を形成するRhを高速AFMで観察すると2つの輝点が列状に並んでいる様子が観察されるが、その観察中に外部から緑色光を照射したところ、輝点の見え方に変化が生じた。Rhは暗状態、明状態(活性化状態)のそれぞれの結晶構造がすでに明らかにされており、それらによると暗状態から明状態への構造変化に伴ってRhの細胞質側(C末端側)表面のループ構造が2量体内で近づくことが分かっている。そこでこれらの結晶構造をもとに高速AFM像の再構成を行った結果、Rh2量体の2つの輝点が近づくことが示された。このことから、高速AFMで観察された輝点の変化は光照射に伴うRhの構造変化に由来するものであると考えられる。 次にRhとGtの相互作用の高速AFM観察を行うために、暗所でGtを機械的に投与するためのAFMシステムの構築を行った。Gtをマイクロ流路へ通して微量精密ポンプでAFM観察チャンバーへと転送する機構を作製し、完全暗所でGtを安定かつ迅速に投与できるようになった。また、Gtとの相互作用を観察するには、高活性な機能を保持したRh超分子クラスターの構築も必要になるため、パターン化膜技術のAFM計測への応用も試みた。専用の治具を作製することでAFM観察に用いる極微小ガラスステージの表面にポリマー膜からなるパターンを形成することに成功した。
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Kobe University, 01 Apr. 2019 - 31 Mar. 2021Reconstitution and functional analysis of photosynthetic machinery in a patterned model membrane高等植物の光合成を行うチラコイド膜には、光合成電子伝達を通じて光エネルギーを化学エネルギーに変換する多様な分子群が2次元膜内に配置されている。本研究は、チラコイド膜における光合成関連タンパク質の動的な分子分布や超分子構造形成が光合成機能にどのように寄与するかを、分子レベルで定量的に解析できる革新的なin vitro評価技術として、固体基板表面に人工チラコイド膜を形成し高感度で機能解析する技術を開発した。そのため、光リソグラフィー技術によりパターン化形成されたポリマー脂質膜に、植物由来のチラコイド膜を導入した。チラコイド膜を高圧処理により断片化し、リン脂質ベシクルを融合促進剤として添加することでパターン化人工膜に導入できることを発見した。そして、チラコイド膜とリン脂質ベシクルの量比を調節することで、区画内に任意の密度でチラコイド膜を導入できることが分かった。電子受容体や阻害剤存在下でのクロロフィル蛍光計測から、光化学系II(PSII)の電子伝達活性の一部が保持されていることが示唆された。一方、低温蛍光観測の結果より、人工チラコイド膜において光化学系I(PSI)は複合体を維持しているものの、PSIIは反応中心と集光性クロロフィルタンパク質複合体(LHCII)が分離していることが示唆された。現在、低温での蛍光イメージング、高速AFMなどを用いて人工チラコイド膜における分子分布を検証しており、今後分子分布の精密計測・操作を通じて光合成機能における分子分布の役割を解明してゆきたい。
- 学術研究助成基金助成金/基盤研究(B), Apr. 2017 - Mar. 2020, Principal investigatorCompetitive research funding
- 科学研究費補助金/基盤研究(B), Apr. 2017 - Mar. 2020, Principal investigatorCompetitive research funding
- 学術研究助成基金助成金/挑戦的萌芽研究, Apr. 2015 - Mar. 2017, Principal investigatorCompetitive research funding
- 科学研究費補助金/基盤研究(B), Apr. 2014 - Mar. 2017, Principal investigatorCompetitive research funding
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Muroran Institute of Technology, 01 Apr. 2013 - 31 Mar. 2016Localized surface plasmon sensing for subtype determination of influenza viruses in a specimen with ultra-small volumeDevelopment of a method for quick subtype determination of influenza viruses is important because infectious and pathogenic properties of viruses are different. In this research, we proposed a method in which refractive index change due to antigen-antibody reaction between target viruses with certain subtype and monoclonal antibodies fixed in a micro-channel on a sensing substrate. To realize this concept, we successfully improved stability and sensitivity of a measurement system for virus detection, confirmed a measurement principle for faster data acquisition, and developed a technique to modify chemical property of a substrate surface to locate certain antibodies in a controlled region.
- 科学研究費補助金/基盤研究(C), Apr. 2012 - Mar. 2015Competitive research funding
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Muroran Institute of Technology, 2010 - 2012Localized surface plasmon sensing for detection and diagnosis of influenza virusesA method to determine subtype of influenza viruses by using surface plasmons localized in microscopic region on a flat metal surface was developed. In this method, refractive index variation arisen from interactions between viruses and their monoclonal antibodies was measured. Theoretical calculation revealed that measurement region had a size of ~180nm in radius, and could be occupied by ~7 viruses. The detection of influenza viruses with certain subtype was successfully demonstrated.
- 科学研究費補助金/新学術領域研究, 2011, Principal investigatorCompetitive research funding
- 科学研究費補助金/挑戦的萌芽研究, 2009, Principal investigatorCompetitive research funding
- 科学研究費補助金/特定領域研究, 2009, Principal investigatorCompetitive research funding
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), National Institute of Advanced Industrial Science and Technology, 2006 - 2007Development of integrated model biological membranes on solid substratesMicropatterned phospholipid bilayers on solid substrates offer an attractive platform for various applications, such as high throughput drug screening. We are currently developing a method for generating micropatterned bilayers composed of polymerized and fluid lipid bilayers. Lithographic photopolymerization of a diacetylene-containing phospholipid (DiynePC) allowed facile fabrication of compartmentalized arrays of fluid lipid membranes. In the present project, we could find a key experimental parameter, that significantly influenced the homogeneity and quality of the fabricated polymeric bilayers, namely the temperature at which monolayers of monomeric DiynePC were formed on the water surface and transferred onto solid substrates by the Langmuir-Blodgett/Langmuir-Schaefer (LB/LS) technique. Using the fluorescence microscopy and atomic force microscopy, it was found that polymerized bilayers were homogeneous, if bilayers of DiynePC were prepared below the triple point temperature (ca. 20℃) of the monolayer, where a direct transition from the gaseous state to the liquid condensed state occurred. The differences were attributed to the domain structures in the monolayer that was transferred from the water surface to the substrate. Another important result from the project is the development of a method to incorporate lipid membranes with membrane proteins. We used mixtures of short and long chain phospholipid, 1, 2-dihexanoyl-sn-glycero-3-phosphocholine (DHPC) and 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC). We demonstrated that formation of planar bilayers was significantly accelerated in the presence of DHPC. Furthermore, membranes containing calcium channels(SR membranes from rabbit muscle) could be incorporated in the model membrane. These results suggest that the use of the mixtures of short and long chain phospholipids could be a convenient means for preparing integrated model membranes.
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