1
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Inaba H, Oikawa K, Ishikawa K, Kodama Y, Matsuura K, Numata K. Binding of Tau-derived peptide-fused GFP to plant microtubules in Arabidopsis thaliana. PLoS One 2023; 18:e0286421. [PMID: 37267323 DOI: 10.1371/journal.pone.0286421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 05/16/2023] [Indexed: 06/04/2023] Open
Abstract
Studies on how exogenous molecules modulate properties of plant microtubules, such as their stability, structure, and dynamics, are important for understanding and modulating microtubule functions in plants. We have developed a Tau-derived peptide (TP) that binds to microtubules and modulates their properties by binding of TP-conjugated molecules in vitro. However, there was no investigation of TPs on microtubules in planta. Here, we generated transgenic Arabidopsis thaliana plants stably expressing TP-fused superfolder GFP (sfGFP-TP) and explored the binding properties and effects of sfGFP-TP on plant microtubules. Our results indicate that the expressed sfGFP-TP binds to the plant microtubules without inhibiting plant growth. A transgenic line strongly expressing sfGFP-TP produced thick fibrous structures that were stable under conditions where microtubules normally depolymerize. This study generates a new tool for analyzing and modulating plant microtubules.
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Affiliation(s)
- Hiroshi Inaba
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori, Japan
- Centre for Research on Green Sustainable Chemistry, Tottori University, Tottori, Japan
| | - Kazusato Oikawa
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Kazuya Ishikawa
- Center for Bioscience Research and Education, Utsunomiya University, Tochigi, Japan
| | - Yutaka Kodama
- Center for Bioscience Research and Education, Utsunomiya University, Tochigi, Japan
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan
| | - Kazunori Matsuura
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori, Japan
- Centre for Research on Green Sustainable Chemistry, Tottori University, Tottori, Japan
| | - Keiji Numata
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan
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2
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Tsuji C, Dodding MP. Lumenal components of cytoplasmic microtubules. Biochem Soc Trans 2022; 50:1953-1962. [PMID: 36524962 DOI: 10.1042/bst20220851] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 11/30/2022] [Accepted: 12/01/2022] [Indexed: 07/30/2023]
Abstract
The lumen of cytoplasmic microtubules is a poorly explored expanse of intracellular space. Although typically represented in textbooks as a hollow tube, studies over several decades have shown that the microtubule lumen is occupied by a range of morphologically diverse components. These are predominantly globular particles of varying sizes which appear to exist either in isolation, bind to the microtubule wall, or form discontinuous columns that extend through the lumenal space. Actin filaments with morphologies distinct from the canonical cytoplasmic forms have also now been found within the microtubule lumen. In this review, we examine the historic literature that observed these lumenal components in tissues from diverse species and integrate it with recent cryo-electron tomography studies that have begun to identify lumenal proteins. We consider their cell and tissue distribution, possible mechanisms of incorporation, and potential functions. It is likely that continuing work in this area will open a new frontier in cytoskeletal biology.
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Affiliation(s)
- Chisato Tsuji
- School of Biochemistry, Faculty of Life Sciences, University of Bristol, Bristol BS8 1TD, U.K
| | - Mark P Dodding
- School of Biochemistry, Faculty of Life Sciences, University of Bristol, Bristol BS8 1TD, U.K
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3
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Inaba H, Sueki Y, Ichikawa M, Kabir AMR, Iwasaki T, Shigematsu H, Kakugo A, Sada K, Tsukazaki T, Matsuura K. Generation of stable microtubule superstructures by binding of peptide-fused tetrameric proteins to inside and outside. SCIENCE ADVANCES 2022; 8:eabq3817. [PMID: 36070375 PMCID: PMC9451167 DOI: 10.1126/sciadv.abq3817] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 07/22/2022] [Indexed: 05/24/2023]
Abstract
Microtubules play important roles in biological functions by forming superstructures, such as doublets and branched structures, in vivo. Despite the importance, it is challenging to construct these superstructures in vitro. Here, we designed a tetrameric fluorescent protein Azami-Green (AG) fused with His-tag and Tau-derived peptide (TP), TP-AG, to generate the superstructures. Main binding sites of TP-AG can be controlled to the inside and outside of microtubules by changing the polymerization conditions. The binding of TP-AG to the inside promoted microtubule formation and generated rigid and stable microtubules. The binding of TP-AG to the outside induced various microtubule superstructures, including doublets, multiplets, branched structures, and extremely long microtubules by recruiting tubulins to microtubules. Motile microtubule aster structures were also constructed by TP-AG. The generation of various microtubule superstructures by a single type of exogenous protein is a new concept for understanding the functions of microtubules and constructing microtubule-based nanomaterials.
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Affiliation(s)
- Hiroshi Inaba
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan
- Centre for Research on Green Sustainable Chemistry, Tottori University, Tottori 680-8552, Japan
| | - Yurina Sueki
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan
| | - Muneyoshi Ichikawa
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
- PRESTO, Japan Science and Technology Agency, Kawaguchi, Japan
| | | | - Takashi Iwasaki
- Department of Bioresources Science, Graduate School of Agricultural Sciences, Tottori University, Tottori 680-8553, Japan
| | | | - Akira Kakugo
- Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Kazuki Sada
- Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Tomoya Tsukazaki
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Kazunori Matsuura
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan
- Centre for Research on Green Sustainable Chemistry, Tottori University, Tottori 680-8552, Japan
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4
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Watari S, Inaba H, Tamura T, Kabir AMR, Kakugo A, Sada K, Hamachi I, Matsuura K. Light-induced stabilization of microtubules by photo-crosslinking of a Tau-derived peptide. Chem Commun (Camb) 2022; 58:9190-9193. [PMID: 35929838 DOI: 10.1039/d2cc01890j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
For light-induced stabilization of microtubules (MTs) to manipulate cells, a photo-reactive diazirine group was conjugated to a Tau-derived peptide, a motif binding on the inside of MTs. Ultraviolet (UV) light irradiation induced significant stabilization of MTs via the formation of a covalent bond of the peptide and showed toxicity.
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Affiliation(s)
- Soei Watari
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Hiroshi Inaba
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan. .,Centre for Research on Green Sustainable Chemistry, Tottori University, Tottori 680-8552, Japan
| | - Tomonori Tamura
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | | | - Akira Kakugo
- Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan.,Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Kazuki Sada
- Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan.,Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Itaru Hamachi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.,JST-ERATO, Hamachi Innovative Molecular Technology for Neuroscience, Nishikyo-ku, Kyoto 615-8530, Japan
| | - Kazunori Matsuura
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan. .,Centre for Research on Green Sustainable Chemistry, Tottori University, Tottori 680-8552, Japan
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5
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Kabir AMR, Munmun T, Hayashi T, Yasuda S, Kimura AP, Kinoshita M, Murata T, Sada K, Kakugo A. Controlling the Rigidity of Kinesin-Propelled Microtubules in an In Vitro Gliding Assay Using the Deep-Sea Osmolyte Trimethylamine N-Oxide. ACS OMEGA 2022; 7:3796-3803. [PMID: 35128287 PMCID: PMC8811939 DOI: 10.1021/acsomega.1c06699] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 01/05/2022] [Indexed: 06/14/2023]
Abstract
The biomolecular motor protein kinesin and its associated filamentous protein microtubule have been finding important nanotechnological applications in the recent years. Rigidity of the microtubules, which are propelled by kinesin motors in an in vitro gliding assay, is an important metric that determines the success of utilization of microtubules and kinesins in various applications, such as transportation, sensing, sorting, molecular robotics, etc. Therefore, regulating the rigidity of kinesin-propelled microtubules has been critical. In this work, we report a simple strategy to regulate the rigidity of kinesin-propelled microtubules in an in vitro gliding assay. We demonstrate that rigidity of the microtubules, propelled by kinesins in an in vitro gliding assay, can be modulated simply by using the natural osmolyte trimethylamine N-oxide (TMAO). By varying the concentration of TMAO in the gliding assay, the rigidity of microtubules can be modulated over a wide range. Based on this strategy, we are able to reduce the persistence length of microtubules, a measure of microtubule rigidity, ∼8 fold by using TMAO at the concentration of 1.5 M. Furthermore, we found that the decreased rigidity of the kinesin-propelled microtubules can be restored upon elimination of TMAO from the in vitro gliding assay. Alteration in the rigidity of microtubules is accounted for by the non-uniformity of the force applied by kinesins along the microtubules in the presence of TMAO. This work offers a facile strategy to reversibly regulate the rigidity of kinesin-propelled microtubules in situ, which would widen the applications of the biomolecular motor kinesin and its associated protein microtubule in various fields.
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Affiliation(s)
| | - Tasrina Munmun
- Graduate
School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Tomohiko Hayashi
- Institute
of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Satoshi Yasuda
- Graduate
School of Science, Chiba University, 1-33 Yayoi-cho, Inage, Chiba 263-8522, Japan
- Membrane
Protein Research and Molecular Chirality Research Centers, Chiba University, 1-33 Yayoi-cho, Inage, Chiba 263-8522, Japan
| | - Atsushi P. Kimura
- Faculty
of Science, Hokkaido University, Sapporo 060-0810, Japan
- Graduate
School of Life Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Masahiro Kinoshita
- Institute
of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
- Graduate
School of Science, Chiba University, 1-33 Yayoi-cho, Inage, Chiba 263-8522, Japan
- Membrane
Protein Research and Molecular Chirality Research Centers, Chiba University, 1-33 Yayoi-cho, Inage, Chiba 263-8522, Japan
| | - Takeshi Murata
- Graduate
School of Science, Chiba University, 1-33 Yayoi-cho, Inage, Chiba 263-8522, Japan
- Membrane
Protein Research and Molecular Chirality Research Centers, Chiba University, 1-33 Yayoi-cho, Inage, Chiba 263-8522, Japan
| | - Kazuki Sada
- Faculty
of Science, Hokkaido University, Sapporo 060-0810, Japan
- Graduate
School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Akira Kakugo
- Faculty
of Science, Hokkaido University, Sapporo 060-0810, Japan
- Graduate
School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
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6
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Inaba H, Kabir AMR, Kakugo A, Sada K, Matsuura K. Structural Changes of Microtubules by Encapsulation of Gold Nanoparticles Using a Tau-Derived Peptide. CHEM LETT 2022. [DOI: 10.1246/cl.210761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hiroshi Inaba
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Koyama-Minami 4-101, Tottori, 680-8552 Japan
- Centre for Research on Green Sustainable Chemistry, Tottori University, Koyama-Minami 4-101, Tottori, 680-8552 Japan
| | | | - Akira Kakugo
- Faculty of Science, Hokkaido University, Kita 10 Nishi 8, Kita-ku, Sapporo, 060-0810 Japan
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, 060-0810 Japan
| | - Kazuki Sada
- Faculty of Science, Hokkaido University, Kita 10 Nishi 8, Kita-ku, Sapporo, 060-0810 Japan
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, 060-0810 Japan
| | - Kazunori Matsuura
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Koyama-Minami 4-101, Tottori, 680-8552 Japan
- Centre for Research on Green Sustainable Chemistry, Tottori University, Koyama-Minami 4-101, Tottori, 680-8552 Japan
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7
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Inaba H, Matsuura K. Encapsulation of Nanomaterials Inside Microtubules by Using a Tau-Derived Peptide. Methods Mol Biol 2022; 2430:243-260. [PMID: 35476337 DOI: 10.1007/978-1-0716-1983-4_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Microtubules (MTs) are tubular cytoskeletons, which are used for the various applications such as active matters and therapeutic targets. Although modification of the exterior surface of MTs is frequently used for functionalization of MTs, there was no approach to introduce molecules inside MTs. We previously developed a unique peptide binding to the inner surface of MT, which is derived from a MT-associated protein, Tau. The Tau-derived peptide (TP) can be used to introduce various nanomaterials inside MTs. Here we describe the TP-based encapsulation of fluorescent dye, gold nanoparticle, green fluorescent protein, and magnetic CoPt nanoparticles inside MTs.
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Affiliation(s)
- Hiroshi Inaba
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori, Japan.
- Centre for Research on Green Sustainable Chemistry, Tottori University, Tottori, Japan.
| | - Kazunori Matsuura
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori, Japan.
- Centre for Research on Green Sustainable Chemistry, Tottori University, Tottori, Japan.
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8
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Inaba H, Matsuura K. Modulation of Microtubule Properties and Functions by Encapsulation of Nanomaterials Using a Tau-Derived Peptide. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20210202] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Hiroshi Inaba
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama-Minami, Tottori 680-8552, Japan
- Centre for Research on Green Sustainable Chemistry, Tottori University, 4-101 Koyama-Minami, Tottori 680-8552, Japan
| | - Kazunori Matsuura
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama-Minami, Tottori 680-8552, Japan
- Centre for Research on Green Sustainable Chemistry, Tottori University, 4-101 Koyama-Minami, Tottori 680-8552, Japan
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9
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Cuveillier C, Boulan B, Ravanello C, Denarier E, Deloulme JC, Gory-Fauré S, Delphin C, Bosc C, Arnal I, Andrieux A. Beyond Neuronal Microtubule Stabilization: MAP6 and CRMPS, Two Converging Stories. Front Mol Neurosci 2021; 14:665693. [PMID: 34025352 PMCID: PMC8131560 DOI: 10.3389/fnmol.2021.665693] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 04/09/2021] [Indexed: 12/21/2022] Open
Abstract
The development and function of the central nervous system rely on the microtubule (MT) and actin cytoskeletons and their respective effectors. Although the structural role of the cytoskeleton has long been acknowledged in neuronal morphology and activity, it was recently recognized to play the role of a signaling platform. Following this recognition, research into Microtubule Associated Proteins (MAPs) diversified. Indeed, historically, structural MAPs—including MAP1B, MAP2, Tau, and MAP6 (also known as STOP);—were identified and described as MT-binding and -stabilizing proteins. Extensive data obtained over the last 20 years indicated that these structural MAPs could also contribute to a variety of other molecular roles. Among multi-role MAPs, MAP6 provides a striking example illustrating the diverse molecular and cellular properties of MAPs and showing how their functional versatility contributes to the central nervous system. In this review, in addition to MAP6’s effect on microtubules, we describe its impact on the actin cytoskeleton, on neuroreceptor homeostasis, and its involvement in signaling pathways governing neuron development and maturation. We also discuss its roles in synaptic plasticity, brain connectivity, and cognitive abilities, as well as the potential relationships between the integrated brain functions of MAP6 and its molecular activities. In parallel, the Collapsin Response Mediator Proteins (CRMPs) are presented as examples of how other proteins, not initially identified as MAPs, fall into the broader MAP family. These proteins bind MTs as well as exhibiting molecular and cellular properties very similar to MAP6. Finally, we briefly summarize the multiple similarities between other classical structural MAPs and MAP6 or CRMPs.In summary, this review revisits the molecular properties and the cellular and neuronal roles of the classical MAPs, broadening our definition of what constitutes a MAP.
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10
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Inaba H, Matsuura K. Live-Cell Fluorescence Imaging of Microtubules by Using a Tau-Derived Peptide. Methods Mol Biol 2021; 2274:169-179. [PMID: 34050471 DOI: 10.1007/978-1-0716-1258-3_15] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Microtubules (MTs) are important targets for imaging in living cells because of their vital roles in cellular processes. The dynamics (polymerization/depolymerization) of MTs has been imaged in living cells by utilizing MT-targeted drugs as scaffolds. We previously developed a unique MT-binding motif derived from a MT-associated protein, Tau. The Tau-derived peptide (TP) binds to the inner surface of MTs without inhibiting the dynamics of MTs. We introduce a new protocol for live-cell imaging of MTs by using fluorescently labeled TP. We exemplify that tetramethylrhodamine (TMR)-labeled TP (TP-TMR) is spontaneously internalized into HepG2 cells and binds to intracellular MTs, enabling visualization of MTs in living cells. TP-TMR shows no apparent effects on polymerization/depolymerization of MTs and no cytotoxicity. Thus, the peptide-based approach is useful for long-term imaging of MTs.
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Affiliation(s)
- Hiroshi Inaba
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori, Japan.
- Centre for Research on Green Sustainable Chemistry, Tottori University, Tottori, Japan.
| | - Kazunori Matsuura
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori, Japan.
- Centre for Research on Green Sustainable Chemistry, Tottori University, Tottori, Japan.
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11
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Shoji K, Kawano R. Recent Advances in Liposome-Based Molecular Robots. MICROMACHINES 2020; 11:E788. [PMID: 32825332 PMCID: PMC7569806 DOI: 10.3390/mi11090788] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/18/2020] [Accepted: 08/19/2020] [Indexed: 01/03/2023]
Abstract
A molecular robot is a microorganism-imitating micro robot that is designed from the molecular level and constructed by bottom-up approaches. As with conventional robots, molecular robots consist of three essential robotics elements: control of intelligent systems, sensors, and actuators, all integrated into a single micro compartment. Due to recent developments in microfluidic technologies, DNA nanotechnologies, synthetic biology, and molecular engineering, these individual parts have been developed, with the final picture beginning to come together. In this review, we describe recent developments of these sensors, actuators, and intelligence systems that can be applied to liposome-based molecular robots. First, we explain liposome generation for the compartments of molecular robots. Next, we discuss the emergence of robotics functions by using and functionalizing liposomal membranes. Then, we discuss actuators and intelligence via the encapsulation of chemicals into liposomes. Finally, the future vision and the challenges of molecular robots are described.
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Affiliation(s)
- Kan Shoji
- Department of Mechanical Engineering, Nagaoka University of Technology, Kamitomioka 1603-1, Nagaoka, Niigata 940-2188, Japan
| | - Ryuji Kawano
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Naka-cho 2-24-16, Koganei, Tokyo 184-8588, Japan
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12
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Inaba H, Yamada M, Rashid MR, Kabir AMR, Kakugo A, Sada K, Matsuura K. Magnetic Force-Induced Alignment of Microtubules by Encapsulation of CoPt Nanoparticles Using a Tau-Derived Peptide. NANO LETTERS 2020; 20:5251-5258. [PMID: 32525681 DOI: 10.1021/acs.nanolett.0c01573] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Construction of magnetotactic materials is a significant challenge in nanotechnology applications such as nanodevices and nanotransportation. Artificial magnetotactic materials can be designed from magnetotactic bacteria because these bacteria use magnetic nanoparticles for aligning with and moving within magnetic fields. Microtubules are attractive scaffolds to construct magnetotactic materials because of their intrinsic motility. Nonetheless, it is challenging to magnetically control their orientation while retaining their motility by conjugating magnetic nanoparticles on their outer surface. Here we solve the issue by encapsulating magnetic cobalt-platinum nanoparticles inside microtubules using our developed Tau-derived peptide that binds to their internal pockets. The in situ growth of cobalt-platinum nanoparticles resulted in the formation of a linear-chain assembly of nanoparticles inside the microtubules. The magnetic microtubules significantly aligned with a high order parameter (0.71) along the weak magnetic field (0.37 T) and showed increased motility. This work provides a new concept for designing magnetotactic materials.
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Affiliation(s)
- Hiroshi Inaba
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Koyama-Minami 4-101, Tottori 680-8552, Japan
- Centre for Research on Green Sustainable Chemistry, Tottori University, Koyama-Minami 4-101, Tottori 680-8552, Japan
| | - Mayuki Yamada
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Koyama-Minami 4-101, Tottori 680-8552, Japan
| | - Mst Rubaya Rashid
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 10 Nishi 8, Kita-ku, Sapporo 060-0810, Japan
| | - Arif Md Rashedul Kabir
- Faculty of Science, Hokkaido University, Kita 10 Nishi 8, Kita-ku, Sapporo 060-0810, Japan
| | - Akira Kakugo
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 10 Nishi 8, Kita-ku, Sapporo 060-0810, Japan
- Faculty of Science, Hokkaido University, Kita 10 Nishi 8, Kita-ku, Sapporo 060-0810, Japan
| | - Kazuki Sada
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 10 Nishi 8, Kita-ku, Sapporo 060-0810, Japan
- Faculty of Science, Hokkaido University, Kita 10 Nishi 8, Kita-ku, Sapporo 060-0810, Japan
| | - Kazunori Matsuura
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Koyama-Minami 4-101, Tottori 680-8552, Japan
- Centre for Research on Green Sustainable Chemistry, Tottori University, Koyama-Minami 4-101, Tottori 680-8552, Japan
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13
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Inaba H, Nagata M, Miyake KJ, Kabir AMR, Kakugo A, Sada K, Matsuura K. Cyclic Tau-derived peptides for stabilization of microtubules. Polym J 2020. [DOI: 10.1038/s41428-020-0356-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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14
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Basu S, Gayen C, Dolai S, Paul A. Tailoring the luminescence of atomic clusters via ligand exchange reaction mediated post synthetic modification. Phys Chem Chem Phys 2020; 22:3959-3964. [PMID: 32022051 DOI: 10.1039/c9cp06063d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The growing prominence of atomic nanoclusters in fields of practical relevance has made modulation of their luminescent characteristics an important challenge for their future applications. Herein we report chemical reaction assisted modulation of luminescence of histidine stabilized gold nanoclusters via a ligand exchange reaction with cysteine. Upon addition of 3.8 mM cysteine, as evinced by X-ray photoelectron spectroscopy in conjunction with transmission electron microscopic analyses, histidine molecules were found to desorb from the surface of the Au NCs leading to the latter's aggregation into macroscopic units. Consequently, the luminescence of the His Au NCs underwent a large bathochromic shift from 475 nm to 500 nm with a concomitant decrease in the luminescence intensity. Thereafter, upon addition of 18 mM cysteine to a dispersion of His Au NCs, cysteine molecules by virtue of strong aurophilic interactions were found to adsorb on to the surface of the Au NCs, leading to the disaggregation of the macroscopic structures. This was accompanied by restoration of the luminescence features of the Au NCs to an emission maximum of 486 nm with partial recovery of the luminescence intensity. Thus, the work embodied herein demonstrates post-synthetic chemical reactions of nanoclusters as an effective and viable tool for tailoring the photoluminescence of atomic clusters to meet application demands.
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Affiliation(s)
- Srestha Basu
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India.
| | - Chirantan Gayen
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India.
| | - Santanu Dolai
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India.
| | - Anumita Paul
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India.
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