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Yagi-Utsumi M, Itoh SG, Okumura H, Yanagisawa K, Kato K, Nishimura K. The Double-Layered Structure of Amyloid-β Assemblage on GM1-Containing Membranes Catalytically Promotes Fibrillization. ACS Chem Neurosci 2023; 14:2648-2657. [PMID: 37482658 PMCID: PMC10401643 DOI: 10.1021/acschemneuro.3c00192] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 07/11/2023] [Indexed: 07/25/2023] Open
Abstract
Alzheimer's disease (AD) is associated with progressive accumulation of amyloid-β (Aβ) cross-β fibrils in the brain. Aβ species tightly associated with GM1 ganglioside, a glycosphingolipid abundant in neuronal membranes, promote amyloid fibril formation; therefore, they could be attractive clinical targets. However, the active conformational state of Aβ in GM1-containing lipid membranes is still unknown. The present solid-state nuclear magnetic resonance study revealed a nonfibrillar Aβ assemblage characterized by a double-layered antiparallel β-structure specifically formed on GM1 ganglioside clusters. Our data show that this unique assemblage was not transformed into fibrils on GM1-containing membranes but could promote conversion of monomeric Aβ into fibrils, suggesting that a solvent-exposed hydrophobic layer provides a catalytic surface evoking Aβ fibril formation. Our findings offer structural clues for designing drugs targeting catalytically active Aβ conformational species for the development of anti-AD therapeutics.
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Affiliation(s)
- Maho Yagi-Utsumi
- Exploratory
Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Okazaki, Aichi 444-8787, Japan
- Institute
for Molecular Science (IMS), National Institutes
of Natural Sciences, Okazaki, Aichi 444-8585, Japan
- Graduate
School of Pharmaceutical Sciences, Nagoya
City University, Nagoya, Aichi 467-8603, Japan
| | - Satoru G. Itoh
- Exploratory
Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Okazaki, Aichi 444-8787, Japan
- Institute
for Molecular Science (IMS), National Institutes
of Natural Sciences, Okazaki, Aichi 444-8585, Japan
| | - Hisashi Okumura
- Exploratory
Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Okazaki, Aichi 444-8787, Japan
- Institute
for Molecular Science (IMS), National Institutes
of Natural Sciences, Okazaki, Aichi 444-8585, Japan
| | - Katsuhiko Yanagisawa
- Research
and Development Center for Precision Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8550, Japan
- Research
Institute, National Center for Geriatrics
and Gerontology, Obu, Aichi 474-8511, Japan
| | - Koichi Kato
- Exploratory
Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Okazaki, Aichi 444-8787, Japan
- Institute
for Molecular Science (IMS), National Institutes
of Natural Sciences, Okazaki, Aichi 444-8585, Japan
- Graduate
School of Pharmaceutical Sciences, Nagoya
City University, Nagoya, Aichi 467-8603, Japan
| | - Katsuyuki Nishimura
- Institute
for Molecular Science (IMS), National Institutes
of Natural Sciences, Okazaki, Aichi 444-8585, Japan
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Purba PC, Maitra PK, Bhattacharyya S, Mukherjee PS. Rigidification-Induced Emissive Metal-Carbene Complexes for Artificial Light Harvesting. Inorg Chem 2023. [PMID: 37411006 DOI: 10.1021/acs.inorgchem.3c01075] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/08/2023]
Abstract
A tetraphenylethylene (TPE)-based flexible imidazolium (L) salt was used to develop a di-nuclear silver(I)-tetracarbene (1) complex. Coordination-induced rigidity upon formation of 1 exhibited a 6-fold increase in emission intensity in acetonitrile compared to starting L. Despite TPE being a well-known aggregation-induced emissive moiety, AgI-N-heterocyclic carbene (NHC) complex 1 had a remarkably higher fluorescence emission (4-fold) in dilute solution when compared with L in its aggregated state. Finally, this enhanced emission was used to institute a new platform for an artificial light-harvesting system. 1 acted as an energy donor and efficiently transferred energy to Eosin Y (ESY) with a high saturation at a 67:1 (1/ESY) molar ratio. Use of rigidification-induced emission of the AgI-NHC complex to fabricate a light-harvesting scaffold is a new approach and can greatly impact the generation of smart materials.
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Affiliation(s)
- Prioti Choudhury Purba
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Pranay Kumar Maitra
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Soumalya Bhattacharyya
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Partha Sarathi Mukherjee
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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Isono T, Komaki R, Kawakami N, Chen K, Chen HL, Lee C, Suzuki K, Ree BJ, Mamiya H, Yamamoto T, Borsali R, Tajima K, Satoh T. Tailored Solid-State Carbohydrate Nanostructures Based on Star-Shaped Discrete Block Co-Oligomers. Biomacromolecules 2022; 23:3978-3989. [PMID: 36039560 DOI: 10.1021/acs.biomac.2c00813] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Carbohydrates are key building blocks for advanced functional materials owing to their biological functions and unique material properties. Here, we propose a star-shaped discrete block co-oligomer (BCO) platform to access carbohydrate nanostructures in bulk and thin-film states via the microphase separation of immiscible carbohydrate and hydrophobic blocks (maltooligosaccharides with 1-4 glucose units and solanesol, respectively). BCOs with various star-shaped architectures and saccharide volume fractions were synthesized using a modular approach. In the bulk, the BCOs self-assembled into common lamellar, cylindrical, and spherical carbohydrate microdomains as well as double gyroid, hexagonally perforated lamellar, and Fddd network morphologies with domain spacings of ∼7 nm. In thin films, long-range-ordered periodic carbohydrate microdomains were fabricated via spin coating. Such controlled spatial arrangements of functional carbohydrate moieties on the nanoscale have great application potential in biomedical and nanofabrication fields.
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Affiliation(s)
- Takuya Isono
- Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Ryoya Komaki
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Nao Kawakami
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Kai Chen
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Hsin-Lung Chen
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Chaehun Lee
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Kazushige Suzuki
- Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Brian J Ree
- Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Hiroaki Mamiya
- National Institute for Materials Science, Tsukuba 305-0047, Japan
| | - Takuya Yamamoto
- Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | | | - Kenji Tajima
- Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Toshifumi Satoh
- Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
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Yagi-Utsumi M, Kato K. Conformational Variability of Amyloid-β and the Morphological Diversity of Its Aggregates. Molecules 2022; 27:4787. [PMID: 35897966 PMCID: PMC9369837 DOI: 10.3390/molecules27154787] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/19/2022] [Accepted: 07/25/2022] [Indexed: 12/03/2022] Open
Abstract
Protein folding is the most fundamental and universal example of biomolecular self-organization and is characterized as an intramolecular process. In contrast, amyloidogenic proteins can interact with one another, leading to protein aggregation. The energy landscape of amyloid fibril formation is characterized by many minima for different competing low-energy structures and, therefore, is much more enigmatic than that of multiple folding pathways. Thus, to understand the entire energy landscape of protein aggregation, it is important to elucidate the full picture of conformational changes and polymorphisms of amyloidogenic proteins. This review provides an overview of the conformational diversity of amyloid-β (Aβ) characterized from experimental and theoretical approaches. Aβ exhibits a high degree of conformational variability upon transiently interacting with various binding molecules in an unstructured conformation in a solution, forming an α-helical intermediate conformation on the membrane and undergoing a structural transition to the β-conformation of amyloid fibrils. This review also outlines the structural polymorphism of Aβ amyloid fibrils depending on environmental factors. A comprehensive understanding of the energy landscape of amyloid formation considering various environmental factors will promote drug discovery and therapeutic strategies by controlling the fibril formation pathway and targeting the consequent morphology of aggregated structures.
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Affiliation(s)
- Maho Yagi-Utsumi
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603, Japan
- Exploratory Research Center on Life and Living Systems and Institute for Molecular Science, National Institutes of Natural Sciences, Okazaki 444-8787, Japan
| | - Koichi Kato
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603, Japan
- Exploratory Research Center on Life and Living Systems and Institute for Molecular Science, National Institutes of Natural Sciences, Okazaki 444-8787, Japan
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Molecular Dynamics Simulation Studies on the Aggregation of Amyloid-β Peptides and Their Disaggregation by Ultrasonic Wave and Infrared Laser Irradiation. Molecules 2022; 27:molecules27082483. [PMID: 35458686 PMCID: PMC9030874 DOI: 10.3390/molecules27082483] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 03/29/2022] [Accepted: 04/07/2022] [Indexed: 01/02/2023] Open
Abstract
Alzheimer’s disease is understood to be caused by amyloid fibrils and oligomers formed by aggregated amyloid-β (Aβ) peptides. This review article presents molecular dynamics (MD) simulation studies of Aβ peptides and Aβ fragments on their aggregation, aggregation inhibition, amyloid fibril conformations in equilibrium, and disruption of the amyloid fibril by ultrasonic wave and infrared laser irradiation. In the aggregation of Aβ, a β-hairpin structure promotes the formation of intermolecular β-sheet structures. Aβ peptides tend to exist at hydrophilic/hydrophobic interfaces and form more β-hairpin structures than in bulk water. These facts are the reasons why the aggregation is accelerated at the interface. We also explain how polyphenols, which are attracting attention as aggregation inhibitors of Aβ peptides, interact with Aβ. An MD simulation study of the Aβ amyloid fibrils in equilibrium is also presented: the Aβ amyloid fibril has a different structure at one end from that at the other end. The amyloid fibrils can be destroyed by ultrasonic wave and infrared laser irradiation. The molecular mechanisms of these amyloid fibril disruptions are also explained, particularly focusing on the function of water molecules. Finally, we discuss the prospects for developing treatments for Alzheimer’s disease using MD simulations.
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Experimental and computational characterization of dynamic biomolecular interaction systems involving glycolipid glycans. Glycoconj J 2022; 39:219-228. [PMID: 35298725 DOI: 10.1007/s10719-022-10056-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/31/2022] [Accepted: 03/09/2022] [Indexed: 02/03/2023]
Abstract
On cell surfaces, carbohydrate chains that modify proteins and lipids mediate various biological functions, which are exerted not only through carbohydrate-protein interactions but also through carbohydrate-carbohydrate interactions. These glycans exhibit considerable degrees of conformational variability and often form clusters providing multiple binding sites. The integration of nuclear magnetic resonance spectroscopy and molecular dynamics simulation has made it possible to delineate the dynamical structures of carbohydrate chains. This approach has facilitated the remodeling of oligosaccharide conformational space in the prebound state to improve protein-binding affinity and has been applied to visualize dynamic carbohydrate-carbohydrate interactions that control glycoprotein-glycoprotein complex formation. Functional glycoclusters have been characterized by experimental and computational approaches applied to various model membranes and artificial self-assembling systems. This line of investigation has provided dynamic views of molecular assembling on glycoclusters, giving mechanistic insights into physiological and pathological molecular events on cell surfaces as well as clues for the design and creation of molecular systems exerting improved glycofunctions. Further development and accumulation of such studies will allow detailed understanding and artificial control of the "glycosynapse" foreseen by Dr. Sen-itiroh Hakomori.
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Tachi Y, Itoh SG, Okumura H. Molecular dynamics simulations of amyloid-β peptides in heterogeneous environments. Biophys Physicobiol 2022; 19:1-18. [PMID: 35666692 PMCID: PMC9135617 DOI: 10.2142/biophysico.bppb-v19.0010] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 03/31/2022] [Indexed: 12/01/2022] Open
Affiliation(s)
- Yuhei Tachi
- Department of Physics, Graduate school of Science, Nagoya University
| | - Satoru G. Itoh
- Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences
| | - Hisashi Okumura
- Institute for Molecular Science, National Institutes of Natural Sciences
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9
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Abstract
New synthetic routes are presented to derivatives of a (known) M8L12 cubic coordination cage in which a range of different substituents are attached at the C4 position of the pyridyl rings at either end of the bis(pyrazolyl-pyridine) bridging ligands. The substituents are (i) –CN groups (new ligand LCN), (ii) –CH2OCH2–CCH (containing a terminal alkyne) groups (new ligand LCC); and (iii) –(CH2OCH2)3CH2OMe (tri-ethyleneglycol monomethyl ether) groups (new ligand LPEG). The resulting functionalised ligands combine with M2+ ions (particularly Co2+, Ni2+, Cd2+) to give isostructural [M8L12]16+ cage cores bearing 24 external functional groups; the cages based on LCN (with M2+ = Cd2+) and LCC (with M2+ = Ni2+) have been crystallographically characterised. The value of these is twofold: (i) exterior nitrile or alkene substituents can provide a basis for further synthetic opportunities via ‘Click’ reactions allowing in principle a diverse range of functionalisation of the cage exterior surface; (ii) the exterior –(CH2OCH2)3CH2OMe groups substantially increase cage solubility in both water and in organic solvents, allowing binding constants of cavity-binding guests to be measured under an increased range of conditions.
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Bhattacharyya S, Venkateswarulu M, Sahoo J, Zangrando E, De M, Mukherjee PS. Self-Assembled PtII8 Metallosupramolecular Tubular Cage as Dual Warhead Antibacterial Agent in Water. Inorg Chem 2020; 59:12690-12699. [DOI: 10.1021/acs.inorgchem.0c01777] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Soumalya Bhattacharyya
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Mangili Venkateswarulu
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Jagabandhu Sahoo
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Ennio Zangrando
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste 34127, Italy
| | - Mrinmoy De
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Partha Sarathi Mukherjee
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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11
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Yagi-Utsumi M. NMR Characterization of Conformational Dynamics and Molecular Assemblies of Proteins. Biol Pharm Bull 2019; 42:867-872. [PMID: 31155585 DOI: 10.1248/bpb.b19-00115] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Dynamic conformational transitions and molecular assemblies are essential properties of proteins, and relevant to their biological and pathological functions. Neurodegenerative diseases are known to be caused by abnormal, toxic assemblies of related proteins, e.g., amyloid β (Aβ) in Alzheimer's disease. Growing evidence indicates that the aggregation of various amyloidogenic proteins, including Aβ, can be highly enhanced at glycolipid membranes, suggesting that dynamic glycolipid-dependent conformational changes of proteins constitute crucial steps for their subsequent pathogenic amyloid fibril formation. It has also been proposed that several proteins, including molecular chaperones, can capture amyloidogenic proteins and thereby suppress their fibrillization. NMR spectroscopy provides a powerful tool for characterizing the conformational dynamics and intermolecular interactions of proteins, as well as for exploring transiently formed weak interactions among proteins in solution with various biomolecules, such as glycolipids. Our research group therefore attempted to elucidate the structural basis of protein-glycolipid and protein-protein interactions that either promote or suppress molecular assemblies of amyloidogenic proteins, using both solution and solid-state NMR methods in conjunction with other biophysical techniques. Our findings provide structural views of molecular processes involving amyloidogenic proteins of clinical and pathological interest and offer clues for the development of drugs to prevent and treat neurodegenerative diseases.
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Affiliation(s)
- Maho Yagi-Utsumi
- Institute for Molecular Science, National Institutes of National Sciences.,Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of National Sciences.,Graduate School of Pharmaceutical Sciences, Nagoya City University
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12
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Srivastava AK, Pittman JM, Zerweck J, Venkata BS, Moore PC, Sachleben JR, Meredith SC. β-Amyloid aggregation and heterogeneous nucleation. Protein Sci 2019; 28:1567-1581. [PMID: 31276610 PMCID: PMC6699094 DOI: 10.1002/pro.3674] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 06/26/2019] [Accepted: 07/03/2019] [Indexed: 01/09/2023]
Abstract
In this article, we consider the role of heterogeneous nucleation in β-amyloid aggregation. Heterogeneous nucleation is more common and occurs at lower levels of supersaturation than homogeneous nucleation. The nucleation period is also the stage at which most of the polymorphism of amyloids arises, this being one of the defining features of amyloids. We focus on several well-known heterogeneous nucleators of β-amyloid, including lipid surfaces, especially those enriched in gangliosides and cholesterol, and divalent metal ions. These two broad classes of nucleators affect β-amyloid particularly in light of the amphiphilicity of these peptides: the N-terminal region, which is largely polar and charged, contains the metal binding site, whereas the C-terminal region is aliphatic and is important in lipid binding. Notably, these two classes of nucleators can interact cooperatively, aggregation begetting greater aggregation.
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Affiliation(s)
- Atul K. Srivastava
- Department of PathologyThe University of ChicagoChicagoIllinois
- Department of Biochemistry and Molecular BiologyThe University of ChicagoChicagoIllinois
| | - Jay M. Pittman
- Department of Biochemistry and Molecular BiologyThe University of ChicagoChicagoIllinois
| | - Jonathan Zerweck
- Department of PathologyThe University of ChicagoChicagoIllinois
- Department of Biochemistry and Molecular BiologyThe University of ChicagoChicagoIllinois
| | - Bharat S. Venkata
- Department of PathologyThe University of ChicagoChicagoIllinois
- Department of Biochemistry and Molecular BiologyThe University of ChicagoChicagoIllinois
| | | | | | - Stephen C. Meredith
- Department of PathologyThe University of ChicagoChicagoIllinois
- Department of Biochemistry and Molecular BiologyThe University of ChicagoChicagoIllinois
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Gim S, Zhu Y, Seeberger PH, Delbianco M. Carbohydrate-based nanomaterials for biomedical applications. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2019; 11:e1558. [PMID: 31063240 DOI: 10.1002/wnan.1558] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 03/21/2019] [Accepted: 03/26/2019] [Indexed: 01/09/2023]
Abstract
Carbohydrates are abundant biomolecules, with a strong tendency to form supramolecular networks. A host of carbohydrate-based nanomaterials have been exploited for biomedical applications. These structures are based on simple mono- or disaccharides, as well as on complex, polymeric systems. Chemical modifications serve to tune the shapes and properties of these materials. In particular, carbohydrate-based nanoparticles and nanogels were used for drug delivery, imaging, and tissue engineering applications. Due to the reversible nature of the assembly, often based on a combination of hydrogen bonding and hydrophobic interactions, carbohydrate-based materials are valuable substrates for the creations of responsive systems. Herein, we review the current research on carbohydrate-based nanomaterials, with a particular focus on carbohydrate assembly. We will discuss how these systems are formed and how their properties are tuned. Particular emphasis will be placed on the use of carbohydrates for biomedical applications. This article is categorized under: Nanotechnology Approaches to Biology > Nanoscale Systems in Biology.
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Affiliation(s)
- Soeun Gim
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany.,Department of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
| | - Yuntao Zhu
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany
| | - Peter H Seeberger
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany.,Department of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
| | - Martina Delbianco
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany
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Conformational Change of Amyloid-β 40 in Association with Binding to GM1-Glycan Cluster. Sci Rep 2019; 9:6853. [PMID: 31048748 PMCID: PMC6497634 DOI: 10.1038/s41598-019-43117-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 04/15/2019] [Indexed: 12/22/2022] Open
Abstract
Aggregates of amyloid-β (Aβ) peptide are well known to be the causative substance of Alzheimer's disease (AD). Recent studies showed that monosialotetrahexosylganglioside (GM1) clusters induce the pathological aggregation of Aβ peptide responsible for the onset and development of AD. However, the effect of GM1-glycan cluster on Aβ conformations has yet to be clarified. Interactions between Aβ peptide and GM1-glycan cluster is important for the earliest stage of the toxic aggregation on GM1 cluster. Here, we performed all-atom molecular dynamics (MD) simulations of Aβ40 on a recently developed artificial GM1-glycan cluster. The artificial GM1-glycan cluster facilitates the characterization of interactions between Aβ40 and multiple GM1-glycans. We succeeded in observing the binding of Aβ40 to the GM1-glycan cluster in all of our MD simulations. Results obtained from these MD simulations indicate the importance of HHQ (13-15) segment of Aβ40 for the GM1-glycan cluster recognition. This result is consistent with previous experimental studies regarding the glycan recognition of Aβ peptide. The recognition mechanism of HHQ (13-15) segment is mainly explained by non-specific stacking interactions between side-chains of histidine and rings of sugar residues, in which the HHQ regime forms coil and bend structures. Moreover, we found that Aβ40 exhibits helix structures at C-terminal side on the GM1-glycan cluster. The helix formation is the initial stage of the pathological aggregation at ceramide moieties of GM1 cluster. The binding of Lys28 to Neu triggers the helix formation at C-terminus side because the formation of a salt bridge between Lys28 and Neu leads to change of intrachain interactions of Aβ40. Our findings suggest that the pathological helix formation of Aβ40 is initiated at GM1-glycan moieties rather than lipid ceramide moieties.
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15
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Debata NB, Tripathy D, Sahoo HS. Development of coordination driven self-assembled discrete spherical ensembles. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.02.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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16
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Mai HD, Tran NM, Yoo H. Multilevel coordination-driven assembly for metallosupramolecules with hierarchical structures. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.02.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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17
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Jiang Y, Park J, Tan P, Feng L, Liu XQ, Sun LB, Zhou HC. Maximizing Photoresponsive Efficiency by Isolating Metal–Organic Polyhedra into Confined Nanoscaled Spaces. J Am Chem Soc 2019; 141:8221-8227. [DOI: 10.1021/jacs.9b01380] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yao Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Jinhee Park
- Department of Emerging Materials Science, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, Republic of Korea
| | - Peng Tan
- State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Liang Feng
- Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States
| | - Xiao-Qin Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Lin-Bing Sun
- State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Hong-Cai Zhou
- Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States
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Hatakeyama M, Nakada F, Ichinose H, Kitaoka T. Direct stimulation of cellular immune response via TLR2 signaling triggered by contact with hybrid glyco-biointerfaces composed of chitohexaose and cellohexaose. Colloids Surf B Biointerfaces 2019; 175:517-522. [PMID: 30576996 DOI: 10.1016/j.colsurfb.2018.12.039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 12/12/2018] [Accepted: 12/13/2018] [Indexed: 12/27/2022]
Abstract
Recognition of carbohydrates by cell receptors activates various cell signaling processes. In this report, hybrid self-assembled monolayers (SAMs) of chitohexaose (βGlcNAc6) and cellohexaose (βGlc6) are prepared to induce a highly sensitive, glyco-density-dependent inflammatory response by HEK293 cells expressing toll-like receptor 2 (TLR2), which recognizes oligo-βGlcNAc moieties. Thiosemicarbazide-labeled βGlcNAc6 and βGlc6, as a bio-signal inducer and a spacer molecule, respectively, were immobilized on a gold substrate via spontaneous chemisorption to control the βGlcNAc6 density on the SAM surface. The βGlcNAc6 density ranged from 0 to 0.65 chains nm-2. The inflammatory response of HEK293 cells varied as a function of the surface glyco-density, and the hybrid SAM with 0.146 chains nm-2 of βGlcNAc6 induced a stronger response than pure βGlcNAc6-SAM with 0.654 chains nm-2. Thus, direct activation of TLR2-mediated cellular stimulation triggered by as-designed glyco-biointerfaces was possible through a mutual interaction between the fittingly βGlcNAc6 moieties assembled on hybrid glyco-SAMs and TLR2 on the surface of HEK293 cells.
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Affiliation(s)
- Mayumi Hatakeyama
- Department of Agro-Environmental Sciences, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Japan
| | - Fumi Nakada
- Department of Agro-Environmental Sciences, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Japan
| | - Hirofumi Ichinose
- Department of Agro-Environmental Sciences, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Japan
| | - Takuya Kitaoka
- Department of Agro-Environmental Sciences, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Japan.
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19
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Two polyhedral frameworks of an M12L24 spherical complex revealed by replica-exchange molecular dynamics simulations. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2018.10.059] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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20
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Datta S, Saha ML, Lahiri N, Yu G, Louie J, Stang PJ. Hierarchical Self-Assembly of a Water-Soluble Organoplatinum(II) Metallacycle into Well-Defined Nanostructures. Org Lett 2018; 20:7020-7023. [PMID: 30371089 PMCID: PMC6385591 DOI: 10.1021/acs.orglett.8b02925] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A water-soluble metallosupramolecular hexagon containing pendant methyl viologen (MV) and trimethylammonium units at the vertices has been synthesized via an organoplatinum(II) ← pyridyl coordination-driven self-assembly reaction. The MV units of the metallacycle were further utilized in the formation of a heteroternary complex with cucurbit[8]uril and a galactose-functionalized naphthalene derivative, yielding a metallacycle-cored carbohydrate cluster that was subsequently ordered into nanospheres and tapes, depending upon the concentration.
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Affiliation(s)
- Sougata Datta
- Department of Chemistry , University of Utah , 315 South 1400 East, Room 2020 , Salt Lake City , Utah 84112 , United States
| | - Manik Lal Saha
- Department of Chemistry , University of Utah , 315 South 1400 East, Room 2020 , Salt Lake City , Utah 84112 , United States
| | - Nabajit Lahiri
- Department of Chemistry , University of Utah , 315 South 1400 East, Room 2020 , Salt Lake City , Utah 84112 , United States
| | - Guocan Yu
- State Key Laboratory of Chemical Engineering, Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , P. R. China
| | - Janis Louie
- Department of Chemistry , University of Utah , 315 South 1400 East, Room 2020 , Salt Lake City , Utah 84112 , United States
| | - Peter J Stang
- Department of Chemistry , University of Utah , 315 South 1400 East, Room 2020 , Salt Lake City , Utah 84112 , United States
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21
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Tachi Y, Okamoto Y, Okumura H. Conformational properties of an artificial GM1 glycan cluster based on a metal-ligand complex. J Chem Phys 2018; 149:135101. [PMID: 30292198 DOI: 10.1063/1.5045310] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
An artificial glycan cluster, in which 24 monosialotetrahexosylganglioside (GM1) glycans are transplanted to the interface of a metal-ligand complex, was recently proposed to investigate the interaction between GM1 glycan clusters and amyloidogenic proteins by NMR analysis. In this study, all-atom molecular dynamics simulations were performed to characterize the conformational properties of the artificial GM1 glycan cluster. We found that more than 65% of GM1 glycans are clustered by interchain hydrogen bonds. Interchain hydrogen bonds are mainly formed between Neu5Ac and Gal'. Pentamers were most frequently observed in the metal-ligand complex. GM1 glycans are tilted and hydrophobically interact with ligand moieties. The hydrophobic surface of the metal-ligand complex increases intrachain hydrogen bonds in each conformation of the GM1 glycans. The increase of intrachain hydrogen bonds stabilizes the local minimum conformations of the GM1 glycan in comparison with the monomeric one. Interchain hydrogen bonding between glycans and glycan-ligand hydrophobic interactions also contribute to this conformational stabilization. Our results provide the physicochemical properties of the new artificial GM1 glycan cluster under the thermal fluctuations for understanding its protein recognition and designing the drug material for amyloidogenic proteins.
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Affiliation(s)
- Yuhei Tachi
- Department of Physics, Graduate school of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - Yuko Okamoto
- Structural Biology Research Center, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - Hisashi Okumura
- Research Center for Computational Science, Institute for Molecular Science, Okazaki, Aichi 444-8585, Japan
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Fujikawa K, Suzuki S, Nagase R, Ikeda S, Mori S, Nomura K, Nishiyama KI, Shimamoto K. Syntheses and Activities of the Functional Structures of a Glycolipid Essential for Membrane Protein Integration. ACS Chem Biol 2018; 13:2719-2727. [PMID: 30064209 DOI: 10.1021/acschembio.8b00654] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
MPIase is the first known glycolipid that is essential for membrane protein integration in the inner membrane of E. coli. Since the amount of natural MPIase available for analysis is limited and it contains structural heterogeneity, precisely designed synthetic derivatives are promising tools for further elucidation of its membrane protein integration mechanism. Thus, we synthesized the minimal unit of MPIase, a trisaccharyl pyrophospholipid termed mini-MPIase-3, and its derivatives. Integration assays revealed that the chemically synthesized trisaccharyl pyrophospholipid possesses significant activity, indicating that it includes the essential structure for membrane integration. Structure-activity relationship studies demonstrated that the number of trisaccharide units and the 6- O-acetyl group on N-acetylglucosamine contribute to efficient integration. Furthermore, anchoring in the membrane by a lipid moiety was essential for the integration. However, the addition of phosphorylated glycans devoid of the lipid moiety in the assay solution modulated the integration activity of MPIase embedded in liposomes, suggesting an interaction between phosphorylated glycans and substrate proteins in aqueous solutions. The prevention of protein aggregation required the 6- O-acetyl group on N-acetylglucosamine, a phosphate group at the reducing end of the glycan, and a long glycan chain. Taken together, we verified the mechanism of the initial step of the translocon-independent pathway in which a membrane protein is captured by a glycan of MPIase, which maintains its structure to be competent for integration, and then MPIase integrates it into the membrane by hydrophobic interactions with membrane lipids.
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Affiliation(s)
- Kohki Fujikawa
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Sonomi Suzuki
- Cryobiofrontier Research Center, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan
| | - Ryohei Nagase
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Shiori Ikeda
- Cryobiofrontier Research Center, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan
| | - Shoko Mori
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Kaoru Nomura
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
| | - Ken-ichi Nishiyama
- Cryobiofrontier Research Center, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan
| | - Keiko Shimamoto
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, 8-1-1 Seikadai, Seika-cho, Soraku-gun, Kyoto 619-0284, Japan
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23
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Ishiwari F, Shoji Y, Fukushima T. Supramolecular scaffolds enabling the controlled assembly of functional molecular units. Chem Sci 2018; 9:2028-2041. [PMID: 29719683 PMCID: PMC5896469 DOI: 10.1039/c7sc04340f] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 01/19/2018] [Indexed: 12/14/2022] Open
Abstract
To assemble functional molecular units into a desired structure while controlling positional and orientational order is a key technology for the development of high-performance organic materials that exhibit electronic, optoelectronic, biological and even dynamic functions. For this purpose, we cannot rely simply on the inherent self-assembly properties of the target functional molecular units, since it is difficult to predict, based solely on the molecular structure, what structure will be achieved upon assembly. To address this issue, it would be useful to employ molecular building blocks with self-assembly structures that can be clearly predicted and defined, to make target molecular units assemble into a desired structure. To date, various motifs of molecular assemblies, polymers, discrete and/or three-dimensional metal-organic complexes, nanoparticles and metal/metal oxide substrates have been developed to create materials with particular structures and dimensionalities. In this perspective, we define such assembly motifs as "supramolecular scaffolds". The structure of supramolecular scaffolds can be classified in terms of dimensionality, and they range in size from nano- to macroscopic scales. Functional molecular units, when attached to supramolecular scaffolds either covalently or non-covalently, can be assembled into specific structures, thus enabling the exploration of new properties, which cannot be achieved with the target molecular units alone. Through the classification and overview of reported examples, we shed new light on supramolecular scaffolds for the rational design of organic and polymeric materials.
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Affiliation(s)
- Fumitaka Ishiwari
- Laboratory for Chemistry and Life Science , Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan .
| | - Yoshiaki Shoji
- Laboratory for Chemistry and Life Science , Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan .
| | - Takanori Fukushima
- Laboratory for Chemistry and Life Science , Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan .
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24
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Matsuzaki K, Kato K, Yanagisawa K. Ganglioside-Mediated Assembly of Amyloid β-Protein: Roles in Alzheimer's Disease. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2018; 156:413-434. [PMID: 29747822 DOI: 10.1016/bs.pmbts.2017.10.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Assembly and deposition of amyloid β-protein (Aβ) is an early and invariable pathological event of Alzheimer's disease (AD), a chronic neurodegenerative disease affecting the neurons in the brain of aging population. Thus, clarification of the molecular mechanism underlying Aβ assembly is crucial not only for understanding the pathogenesis of AD, but also for developing disease-modifying remedies. In 1995, ganglioside-bound Aβ (GAβ), with unique molecular characteristics, including its altered immunoreactivity and its conspicuous ability to accelerate Aβ assembly, was discovered in an autopsied brain showing early pathological changes of AD. Based on these findings, it was hypothesized that GAβ is an endogenous seed for amyloid fibril formation in the AD brain. A body of evidence that supports the GAβ hypothesis has been growing for over 20years as follows. First, the conformational changes of Aβ from a random coil to an α-helix, and then to a β-sheet in the presence of ganglioside were validated by several techniques. Second, the seed activity of GAβ to accelerate the assembly of soluble Aβ into amyloid fibrils was confirmed by various in vitro and in vivo experiments. Third, it was found that the Aβ binding to ganglioside to form GAβ occurs under limited conditions, which were provided by the lipid environment surrounding ganglioside. Fourth, the region-specific Aβ deposition in the brain appeared to be dependent on the presence of the lipid environment that was in favor of GAβ generation. In this chapter, further progress of the study of ganglioside-mediated Aβ assembly, especially from the aspects of physicochemistry, structural biology, and neuropathology, is reviewed.
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Affiliation(s)
| | - Koichi Kato
- Nagoya City University, Nagoya, Japan; Okazaki Institute for Integrative Bioscience and Institute for Molecular Science, National Institutes of Natural Sciences, Okazaki, Japan
| | - Katsuhiko Yanagisawa
- Center for Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan.
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25
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Kurihara K, Matsuo M, Yamaguchi T, Sato S. Synthetic Approach to biomolecular science by cyborg supramolecular chemistry. Biochim Biophys Acta Gen Subj 2017; 1862:358-364. [PMID: 29129642 DOI: 10.1016/j.bbagen.2017.11.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 10/28/2017] [Accepted: 11/01/2017] [Indexed: 12/18/2022]
Abstract
BACKGROUND To imitate the essence of living systems via synthetic chemistry approaches has been attempted. With the progress in supramolecular chemistry, it has become possible to synthesize molecules of a size and complexity close to those of biomacromolecules. Recently, the combination of precisely designed supramolecules with biomolecules has generated structural platforms for designing and creating unique molecular systems. Bridging between synthetic chemistry and biomolecular science is also developing methodologies for the creation of artificial cellular systems. SCOPE OF REVIEW This paper provides an overview of the recently expanding interdisciplinary research to fuse artificial molecules with biomolecules, that can deepen our understanding of the dynamical ordering of biomolecules. MAJOR CONCLUSIONS AND GENERAL SIGNIFICANCE Using bottom-up approaches based on the precise chemical design, synthesis and hybridization of artificial molecules with biological materials have been realizing the construction of sophisticated platforms having the fundamental functions of living systems. The effective hybrid, molecular cyborg, approaches enable not only the establishment of dynamic systems mimicking nature and thus well-defined models for biophysical understanding, but also the creation of those with highly advanced, integrated functions. This article is part of a Special Issue entitled "Biophysical Exploration of Dynamical Ordering of Biomolecular Systems" edited by Dr. Koichi Kato.
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Affiliation(s)
- Kensuke Kurihara
- Department of Bioorganization Research, Okazaki Institute for Integrative Bioscience, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan; Department of Life and Coordination-Complex Molecular Science, Institute for Molecular Science, National Institutes of Natural Sciences, 38 Nishigo-naka, Myodaiji, Okazaki, Aichi 444-8585, Japan
| | - Muneyuki Matsuo
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Takumi Yamaguchi
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi 923-1292, Japan.
| | - Sota Sato
- Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; JST, ERATO, Isobe Degenerate π-Integration Project, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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26
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Uchida J, Yoshio M, Sato S, Yokoyama H, Fujita M, Kato T. Self‐Assembly of Giant Spherical Liquid‐Crystalline Complexes and Formation of Nanostructured Dynamic Gels that Exhibit Self‐Healing Properties. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707740] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Junya Uchida
- Department of Chemistry and Biotechnology School of Engineering The University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Masafumi Yoshio
- Department of Chemistry and Biotechnology School of Engineering The University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
- Current address: Semiconductor Nano-interfaces Group, Research Center for Functional Materials National Institute for Materials Science Namiki, Tsukuba Ibaraki 305-0044 Japan
| | - Sota Sato
- Department of Applied Chemistry School of Engineering The University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
- WPI-AIMR, Department of Chemistry and JST ERATO Tohoku University Katahira, Aoba-ku Sendai 980-8577 Japan
- Current address: Department of Chemistry School of Science and JST ERATO The University of Tokyo Hongo Bunkyo-ku Tokyo 113-0033 Japan
| | - Hiroyuki Yokoyama
- Department of Applied Chemistry School of Engineering The University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Makoto Fujita
- Department of Applied Chemistry School of Engineering The University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Takashi Kato
- Department of Chemistry and Biotechnology School of Engineering The University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
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27
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Uchida J, Yoshio M, Sato S, Yokoyama H, Fujita M, Kato T. Self‐Assembly of Giant Spherical Liquid‐Crystalline Complexes and Formation of Nanostructured Dynamic Gels that Exhibit Self‐Healing Properties. Angew Chem Int Ed Engl 2017; 56:14085-14089. [DOI: 10.1002/anie.201707740] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Indexed: 12/28/2022]
Affiliation(s)
- Junya Uchida
- Department of Chemistry and Biotechnology School of Engineering The University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Masafumi Yoshio
- Department of Chemistry and Biotechnology School of Engineering The University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
- Current address: Semiconductor Nano-interfaces Group, Research Center for Functional Materials National Institute for Materials Science Namiki, Tsukuba Ibaraki 305-0044 Japan
| | - Sota Sato
- Department of Applied Chemistry School of Engineering The University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
- WPI-AIMR, Department of Chemistry and JST ERATO Tohoku University Katahira, Aoba-ku Sendai 980-8577 Japan
- Current address: Department of Chemistry School of Science and JST ERATO The University of Tokyo Hongo Bunkyo-ku Tokyo 113-0033 Japan
| | - Hiroyuki Yokoyama
- Department of Applied Chemistry School of Engineering The University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Makoto Fujita
- Department of Applied Chemistry School of Engineering The University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Takashi Kato
- Department of Chemistry and Biotechnology School of Engineering The University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan
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28
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Yan G, Yamaguchi T, Suzuki T, Yanaka S, Sato S, Fujita M, Kato K. Hyper-Assembly of Self-Assembled Glycoclusters Mediated by Specific Carbohydrate-Carbohydrate Interactions. Chem Asian J 2017; 12:968-972. [DOI: 10.1002/asia.201700202] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 03/13/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Gengwei Yan
- School of Physical Science; SOKENDAI (The Graduate University for Advanced Studies); 5-1 Higashiyama Myodaiji Okazaki 444-8787 Japan
- Institute for Molecular Science and Okazaki Institute for Integrative Bioscience; National Institutes of Natural Sciences; 5-1 Higashiyama Myodaiji Okazaki 444-8787 Japan
- School of Materials Science; Japan Advanced Institute of Science and Technology; 1-1 Asahidai Nomi 923-1292 Japan
- Graduate School of Pharmaceutical Sciences; Nagoya City University; 3-1 Tanabe-dori Mizuho-ku Nagoya 467-8603 Japan
| | - Takumi Yamaguchi
- Institute for Molecular Science and Okazaki Institute for Integrative Bioscience; National Institutes of Natural Sciences; 5-1 Higashiyama Myodaiji Okazaki 444-8787 Japan
- School of Materials Science; Japan Advanced Institute of Science and Technology; 1-1 Asahidai Nomi 923-1292 Japan
- Graduate School of Pharmaceutical Sciences; Nagoya City University; 3-1 Tanabe-dori Mizuho-ku Nagoya 467-8603 Japan
| | - Tatsuya Suzuki
- Institute for Molecular Science and Okazaki Institute for Integrative Bioscience; National Institutes of Natural Sciences; 5-1 Higashiyama Myodaiji Okazaki 444-8787 Japan
- Graduate School of Pharmaceutical Sciences; Nagoya City University; 3-1 Tanabe-dori Mizuho-ku Nagoya 467-8603 Japan
| | - Saeko Yanaka
- Institute for Molecular Science and Okazaki Institute for Integrative Bioscience; National Institutes of Natural Sciences; 5-1 Higashiyama Myodaiji Okazaki 444-8787 Japan
- Graduate School of Pharmaceutical Sciences; Nagoya City University; 3-1 Tanabe-dori Mizuho-ku Nagoya 467-8603 Japan
| | - Sota Sato
- Advanced Institute for Materials Research; Tohoku University; 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan
- JST; ERATO; Isobe Degenerate π-Integration Project; 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan
- School of Engineering; The University of Tokyo; 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Makoto Fujita
- School of Engineering; The University of Tokyo; 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Koichi Kato
- School of Physical Science; SOKENDAI (The Graduate University for Advanced Studies); 5-1 Higashiyama Myodaiji Okazaki 444-8787 Japan
- Institute for Molecular Science and Okazaki Institute for Integrative Bioscience; National Institutes of Natural Sciences; 5-1 Higashiyama Myodaiji Okazaki 444-8787 Japan
- Graduate School of Pharmaceutical Sciences; Nagoya City University; 3-1 Tanabe-dori Mizuho-ku Nagoya 467-8603 Japan
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29
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Ogura A, Tahara T, Nozaki S, Onoe H, Kurbangalieva A, Watanabe Y, Tanaka K. Glycan multivalency effects toward albumin enable N-glycan-dependent tumor targeting. Bioorg Med Chem Lett 2016; 26:2251-4. [DOI: 10.1016/j.bmcl.2016.03.046] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 03/05/2016] [Accepted: 03/14/2016] [Indexed: 11/28/2022]
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Calamai M, Evangelisti E, Cascella R, Parenti N, Cecchi C, Stefani M, Pavone F. Single molecule experiments emphasize GM1 as a key player of the different cytotoxicity of structurally distinct Aβ1-42 oligomers. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1858:386-92. [PMID: 26656159 DOI: 10.1016/j.bbamem.2015.12.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 11/10/2015] [Accepted: 12/03/2015] [Indexed: 12/29/2022]
Abstract
It is well established that cytotoxic Aβ oligomers are the key factor that triggers the initial tissue and cell modifications eventually culminating in the development of Alzheimer's disease. Aβ1-42 oligomers display a high degree of polymorphism, and several structurally different oligomers have been described. Amongst them, two types, recently classified as A+ and A-, have been shown to possess similar size but distinct toxic properties, as a consequence of their biophysical and structural differences. Here, we have investigated by means of single molecule tracking the oligomer mobility on the plasma membrane of living neuroblastoma cells and the interaction with the ganglioside GM1, a component of membrane rafts. We have found that A+ and A- oligomers display a similar lateral diffusion on the plasma membrane of living cells. However, only the toxic A+ oligomers appear to interact and alter the mobility of GM1. We have also studied the lateral diffusion of each kind of oligomers in cells depleted or enriched in GM1. We found that the content of GM1 influences the diffusion of both types of oligomer, although the effect of the increased levels of GM1 is higher for the A+ type. Interestingly, the content of GM1 also affects significantly the mobility of GM1 molecules themselves.
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Affiliation(s)
- Martino Calamai
- European Laboratory for Non-linear Spectroscopy (LENS), University of Florence, 50019 Florence, Italy; National Institute of Optics, National Research Council of Italy (CNR), Largo Fermi 6, 50125, Florence, Italy.
| | - Elisa Evangelisti
- Dipartimento di Scienze Biomediche Sperimentali e Clinche "Mario Serio", Università degli Studi di Firenze, 50134 Florence, Italy
| | - Roberta Cascella
- Dipartimento di Scienze Biomediche Sperimentali e Clinche "Mario Serio", Università degli Studi di Firenze, 50134 Florence, Italy
| | - Niccoló Parenti
- European Laboratory for Non-linear Spectroscopy (LENS), University of Florence, 50019 Florence, Italy
| | - Cristina Cecchi
- Dipartimento di Scienze Biomediche Sperimentali e Clinche "Mario Serio", Università degli Studi di Firenze, 50134 Florence, Italy; Centro Interuniversitario per lo Studio delle Malattie Neurodegenerative (CIMN), 50134 Florence, Italy
| | - Massimo Stefani
- Dipartimento di Scienze Biomediche Sperimentali e Clinche "Mario Serio", Università degli Studi di Firenze, 50134 Florence, Italy; Centro Interuniversitario per lo Studio delle Malattie Neurodegenerative (CIMN), 50134 Florence, Italy
| | - Francesco Pavone
- European Laboratory for Non-linear Spectroscopy (LENS), University of Florence, 50019 Florence, Italy
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31
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Xu WQ, Li YH, Wang HP, Jiang JJ, Fenske D, Su CY. Face-Capped M4L4Tetrahedral Metal-Organic Cage: Iodine Capture and Release, Ion Exchange, and Electrical Conductivity. Chem Asian J 2015; 11:216-20. [DOI: 10.1002/asia.201501161] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Indexed: 12/13/2022]
Affiliation(s)
- Wei-Qin Xu
- Lehn Institute of Functional Materials; School of Chemistry and Chemical Engineering; Sun Yat-Sen University; Guangzhou 510275 China
- Karlsruher Institut für Technologie (KIT); Institut für Anorganische Chemie; 76131 Karlsruhe Germany
| | - Yu-Hao Li
- Lehn Institute of Functional Materials; School of Chemistry and Chemical Engineering; Sun Yat-Sen University; Guangzhou 510275 China
| | - Hai-Ping Wang
- Lehn Institute of Functional Materials; School of Chemistry and Chemical Engineering; Sun Yat-Sen University; Guangzhou 510275 China
| | - Ji-Jun Jiang
- Lehn Institute of Functional Materials; School of Chemistry and Chemical Engineering; Sun Yat-Sen University; Guangzhou 510275 China
| | - Dieter Fenske
- Lehn Institute of Functional Materials; School of Chemistry and Chemical Engineering; Sun Yat-Sen University; Guangzhou 510275 China
- Karlsruher Institut für Technologie (KIT); Institut für Anorganische Chemie; 76131 Karlsruhe Germany
| | - Cheng-Yong Su
- Lehn Institute of Functional Materials; School of Chemistry and Chemical Engineering; Sun Yat-Sen University; Guangzhou 510275 China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; Shanghai 200032 China
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Roy B, Ghosh AK, Srivastava S, D'Silva P, Mukherjee PS. A Pd8 Tetrafacial Molecular Barrel as Carrier for Water Insoluble Fluorophore. J Am Chem Soc 2015; 137:11916-9. [DOI: 10.1021/jacs.5b08008] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Bijan Roy
- Department
of Inorganic and Physical Chemistry and ‡Department of Biochemistry, Indian Institute of Science, Bangalore 560012, India
| | - Aloke Kumar Ghosh
- Department
of Inorganic and Physical Chemistry and ‡Department of Biochemistry, Indian Institute of Science, Bangalore 560012, India
| | - Shubhi Srivastava
- Department
of Inorganic and Physical Chemistry and ‡Department of Biochemistry, Indian Institute of Science, Bangalore 560012, India
| | - Patrick D'Silva
- Department
of Inorganic and Physical Chemistry and ‡Department of Biochemistry, Indian Institute of Science, Bangalore 560012, India
| | - Partha Sarathi Mukherjee
- Department
of Inorganic and Physical Chemistry and ‡Department of Biochemistry, Indian Institute of Science, Bangalore 560012, India
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