1
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Ingram AA, Wang D, Schwaneberg U, Okuda J. Grubbs-Hoveyda catalysts conjugated to a β-barrel protein: Effect of halide substitution on aqueous olefin metathesis activity. J Inorg Biochem 2024; 258:112616. [PMID: 38833874 DOI: 10.1016/j.jinorgbio.2024.112616] [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] [Received: 03/30/2024] [Revised: 05/15/2024] [Accepted: 05/18/2024] [Indexed: 06/06/2024]
Abstract
The effect of halide substitution in Grubbs-Hoveyda II catalysts (GHII catalysts) embedded in the engineered β-barrel protein nitrobindin (NB4exp) on metathesis activity in aqueous media was studied. Maleimide tagged dibromido and diiodido derivates of the GHII catalyst were synthesized and covalently conjugated to NB4exp. The biohybrid catalysts were characterized spectroscopically confirming the structural integrity. When the two chloride substituents at ruthenium center were exchanged against bromide and iodide, the diiodo derivative was found to show significantly higher catalytic activity in ring-closing metathesis of α,ω-diolefins, whereas the dibromido derivative was less efficient when compared with the parent dichlorido catalyst. Using the diiodido catalyst, high turnover numbers of up to 75 were observed for ring-closing metathesis (RCM) yielding unsaturated six- and seven-membered N-heterocycles.
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Affiliation(s)
- Aaron A Ingram
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Dong Wang
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany; Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, 52074 Aachen, Germany
| | - Ulrich Schwaneberg
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, 52074 Aachen, Germany
| | - Jun Okuda
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
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2
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Blanco C, Ramos Castellanos R, Fogg DE. Anionic Olefin Metathesis Catalysts Enable Modification of Unprotected Biomolecules in Water. ACS Catal 2024; 14:11147-11152. [PMID: 39114091 PMCID: PMC11301623 DOI: 10.1021/acscatal.4c02811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2024] [Revised: 06/24/2024] [Accepted: 07/01/2024] [Indexed: 08/10/2024]
Abstract
Stability problems have limited the uptake of cationic olefin metathesis catalysts in chemical biology. Described herein are anionic catalysts that improve water-solubility, robustness, and compatibility with biomolecules such as DNA. A sulfonate tag is installed on the cyclic (alkyl)(amino) carbene (CAAC) ligand platform, chosen for resistance to degradation by nucleophiles, base, water, and β-elimination. Hoveyda-Grubbs catalysts bearing the sulfonated CAAC ligands deliver record productivity in metathesis of unprotected carbohydrates and nucleosides at neutral pH. Decomposed catalyst has negligible impact on metathesis selectivity, whereas N-heterocyclic carbene (NHC) catalysts degrade rapidly in water and cause extensive C=C migration.
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Affiliation(s)
- Christian
O. Blanco
- Center
for Catalysis Research & Innovation, and Department of Chemistry
and Biomolecular Sciences, University of
Ottawa, Ottawa, Ontario, K1N 6N5, Canada
| | - Richard Ramos Castellanos
- Center
for Catalysis Research & Innovation, and Department of Chemistry
and Biomolecular Sciences, University of
Ottawa, Ottawa, Ontario, K1N 6N5, Canada
| | - Deryn E. Fogg
- Center
for Catalysis Research & Innovation, and Department of Chemistry
and Biomolecular Sciences, University of
Ottawa, Ottawa, Ontario, K1N 6N5, Canada
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
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3
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Vazquez-Martel C, Florido Martins L, Genthner E, Almeida C, Martel Quintana A, Bastmeyer M, Gómez Pinchetti JL, Blasco E. Printing Green: Microalgae-Based Materials for 3D Printing with Light. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2402786. [PMID: 38876261 DOI: 10.1002/adma.202402786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 06/05/2024] [Indexed: 06/16/2024]
Abstract
Microalgae have emerged as sustainable feedstocks due to their ability to fix CO2 during cultivation, rapid growth rates, and capability to produce a wide variety of metabolites. Several microalgae accumulate lipids in high concentrations, especially triglycerides, along with lipid-soluble, photoactive pigments such as chlorophylls and derivatives. Microalgae-derived triglycerides contain longer fatty acid chains with more double bonds on average than vegetable oils, allowing a higher degree of post-functionalization. Consequently, they are especially suitable as precursors for materials that can be used in 3D printing with light. This work presents the use of microalgae as "biofactories" to generate materials that can be further 3D printed in high resolution. Two taxonomically different strains -Odontella aurita (O. aurita, BEA0921B) and Tetraselmis striata (T. striata, BEA1102B)- are identified as suitable microalgae for this purpose. The extracts obtained from the microalgae (mainly triglycerides with chlorophyll derivatives) are functionalized with photopolymerizable groups and used directly as printable materials (inks) without the need for additional photoinitiators. The fabrication of complex 3D microstructures with sub-micron resolution is demonstrated. Notably, the 3D printed materials show biocompatibility. These findings open new possibilities for the next generation of sustainable, biobased, and biocompatible materials with great potential in life science applications.
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Affiliation(s)
- Clara Vazquez-Martel
- Institute of Molecular Systems Engineering and Advanced Materials (IMSEAM), Heidelberg University, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
| | - Lilliana Florido Martins
- Institute of Molecular Systems Engineering and Advanced Materials (IMSEAM), Heidelberg University, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
| | - Elisa Genthner
- Zoological Institute, Cell and Neurobiology, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 4, 76131, Karlsruhe, Germany
| | - Carlos Almeida
- Banco Español de Algas (BEA), Universidad de Las Palmas de Gran Canaria (ULPGC), Muelle de Taliarte s/n, Telde, Las Palmas, 35214, Spain
| | - Antera Martel Quintana
- Banco Español de Algas (BEA), Universidad de Las Palmas de Gran Canaria (ULPGC), Muelle de Taliarte s/n, Telde, Las Palmas, 35214, Spain
| | - Martin Bastmeyer
- Zoological Institute, Cell and Neurobiology, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 4, 76131, Karlsruhe, Germany
- Institute for Biological and Chemical Systems - Biological Information Processing (IBCS-BIP), KIT, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Juan Luis Gómez Pinchetti
- Banco Español de Algas (BEA), Universidad de Las Palmas de Gran Canaria (ULPGC), Muelle de Taliarte s/n, Telde, Las Palmas, 35214, Spain
| | - Eva Blasco
- Institute of Molecular Systems Engineering and Advanced Materials (IMSEAM), Heidelberg University, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
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4
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Liu H, Yu S, Liu B, Xiang S, Jiang M, Yang F, Tan W, Zhou J, Xiao M, Li X, Richardson JJ, Lin W, Zhou J. Space-Efficient 3D Microalgae Farming with Optimized Resource Utilization for Regenerative Food. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2401172. [PMID: 38483347 DOI: 10.1002/adma.202401172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/07/2024] [Indexed: 03/23/2024]
Abstract
Photosynthetic microalgae produce valuable metabolites and are a source of sustainable food that supports life without compromising arable land. However, the light self-shading, excessive water supply, and insufficient space utilization in microalgae farming have limited its potential in the inland areas most in need of regenerative food solutions. Herein, this work develops a 3D polysaccharide-based hydrogel scaffold for vertically farming microalgae without needing liquid media. This liquid-free strategy is compatible with diverse microalgal species and enables the design of living microalgal frameworks with customizable architectures that enhance light and water utilization. This approach significantly increases microalgae yield per unit water consumption, with an 8.8-fold increase compared to traditional methods. Furthermore, the dehydrated hydrogels demonstrate a reduced size and weight (≈70% reduction), but readily recover their vitality upon rehydration. Importantly, valuable natural products can be produced in this system including proteins, carbohydrates, lipids, and carotenoids. This study streamlines microalgae regenerative farming for low-carbon biomanufacturing by minimizing light self-shading, relieving water supply, and reducing physical footprints, and democratizing access to efficient aquatic food production.
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Affiliation(s)
- Hai Liu
- College of Biomass Science and Engineering, Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, China
| | - Siqin Yu
- Department of Energy Science and Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Bin Liu
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Shenzhen Key Laboratory of Food Nutrition and Health, Institute for Advanced Study, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Shuhong Xiang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Minwen Jiang
- College of Biomass Science and Engineering, Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, China
| | - Fan Yang
- College of Biomass Science and Engineering, Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, China
| | - Weiwei Tan
- College of Biomass Science and Engineering, Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, China
| | - Jianfei Zhou
- College of Biomass Science and Engineering, Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, China
- Research Institute of Leather and Footwear Industry of Wenzhou, Wenzhou, 325000, China
| | - Ming Xiao
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Xiaojie Li
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Shenzhen Key Laboratory of Food Nutrition and Health, Institute for Advanced Study, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Joseph J Richardson
- School of Engineering, RMIT University, Melbourne, Victoria, 3000, Australia
| | - Wei Lin
- College of Biomass Science and Engineering, Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, China
| | - Jiajing Zhou
- College of Biomass Science and Engineering, Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, China
- Research Institute of Leather and Footwear Industry of Wenzhou, Wenzhou, 325000, China
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5
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Nasibullin I, Yoshioka H, Mukaimine A, Nakamura A, Kusakari Y, Chang TC, Tanaka K. Catalytic olefin metathesis in blood. Chem Sci 2023; 14:11033-11039. [PMID: 37860663 PMCID: PMC10583672 DOI: 10.1039/d3sc03785a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 09/05/2023] [Indexed: 10/21/2023] Open
Abstract
The direct synthesis of drugs in vivo enables drugs to treat diseases without causing side effects in healthy tissues. Transition-metal reactions have been widely explored for uncaging and synthesizing bioactive drugs in biological environments because of their remarkable reactivity. Nonetheless, it is difficult to develop a promising method to achieve in vivo drug synthesis because blood cells and metabolites deactivate transition-metal catalysts. We report that a robust albumin-based artificial metalloenzyme (ArM) with a low loading (1-5 mol%) can promote Ru-based olefin metathesis to synthesize molecular scaffolds and an antitumor drug in blood. The ArM retained its activity after soaking in blood for 24 h and provided the first example of catalytic olefin cross metathesis in blood. Furthermore, the cyclic-Arg-Gly-Asp (cRGD) peptide-functionalized ArM at lower dosages could still efficiently perform in vivo drug synthesis to inhibit the growth of implanted tumors in mice. Such a system can potentially construct therapeutic drugs in vivo for therapies without side effects.
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Affiliation(s)
- Igor Nasibullin
- Biofunctional Synthetic Chemistry Laboratory, Cluster for Pioneering Research RIKEN Wako-shi Saitama 351-0198 Japan
| | - Hiromasa Yoshioka
- Biofunctional Synthetic Chemistry Laboratory, Cluster for Pioneering Research RIKEN Wako-shi Saitama 351-0198 Japan
| | - Akari Mukaimine
- Biofunctional Synthetic Chemistry Laboratory, Cluster for Pioneering Research RIKEN Wako-shi Saitama 351-0198 Japan
| | - Akiko Nakamura
- Biofunctional Synthetic Chemistry Laboratory, Cluster for Pioneering Research RIKEN Wako-shi Saitama 351-0198 Japan
| | - Yuriko Kusakari
- Biofunctional Synthetic Chemistry Laboratory, Cluster for Pioneering Research RIKEN Wako-shi Saitama 351-0198 Japan
| | - Tsung-Che Chang
- Biofunctional Synthetic Chemistry Laboratory, Cluster for Pioneering Research RIKEN Wako-shi Saitama 351-0198 Japan
| | - Katsunori Tanaka
- Biofunctional Synthetic Chemistry Laboratory, Cluster for Pioneering Research RIKEN Wako-shi Saitama 351-0198 Japan
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology Meguro-ku Tokyo 152-8552 Japan
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6
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Nguyen HD, Jana RD, Campbell DT, Tran TV, Do LH. Lewis acid-driven self-assembly of diiridium macrocyclic catalysts imparts substrate selectivity and glutathione tolerance. Chem Sci 2023; 14:10264-10272. [PMID: 37772092 PMCID: PMC10530542 DOI: 10.1039/d3sc02836d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 09/02/2023] [Indexed: 09/30/2023] Open
Abstract
Molecular inorganic catalysts (MICs) tend to have solvent-exposed metal centers that lack substrate specificity and are easily inhibited by biological nucleophiles. Unfortunately, these limitations exclude many MICs from being considered for in vivo applications. To overcome this challenge, a strategy to spatially confine MICs using Lewis acid-driven self-assembly is presented. It was shown that in the presence of external cations (e.g., Li+, Na+, K+, or Cs+) or phosphate buffered saline, diiridium macrocycles spontaneously formed supramolecular iridium-cation species, which were characterized by X-ray crystallography and dynamic light scattering. These nanoassemblies selectively reduced sterically unhindered C[double bond, length as m-dash]O groups via transfer hydrogenation and tolerated up to 1 mM of glutathione. In contrast, when non-coordinating tetraalkylammonium cations were used, the diiridium catalysts were unable to form higher-ordered structures and discriminate between different aldehyde substrates. This work suggests that in situ coordination self-assembly could be a versatile approach to enable or enhance the integration of MICs with biological hosts.
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Affiliation(s)
- Hieu D Nguyen
- Department of Chemistry, University of Houston 4800 Calhoun Road Houston Texas USA
| | - Rahul D Jana
- Department of Chemistry, University of Houston 4800 Calhoun Road Houston Texas USA
| | - Dylan T Campbell
- Department of Chemistry, University of Houston 4800 Calhoun Road Houston Texas USA
| | - Thi V Tran
- Department of Chemistry, University of Houston 4800 Calhoun Road Houston Texas USA
| | - Loi H Do
- Department of Chemistry, University of Houston 4800 Calhoun Road Houston Texas USA
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7
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Chen Y, Wu T, Xie S, Bai Y, Xing H. Orientation-controlled membrane anchoring of bioorthogonal catalysts on live cells via liposome fusion-based transport. SCIENCE ADVANCES 2023; 9:eadg2583. [PMID: 37163595 PMCID: PMC10171822 DOI: 10.1126/sciadv.adg2583] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
An obstacle to conducting diverse bioorthogonal reactions in living systems is the sensitivity of artificial metal catalysts. It has been reported that artificial metallocatalysts can be assembled in "cleaner" environments in cells for stabilized performance, which is powerful but is limited by the prerequisite of using specific cells. We report here a strategy to establish membrane-anchored catalysts with precise spatial control via liposome fusion-based transport (MAC-LiFT), loading bioorthogonal catalytic complexes onto either or both sides of the membrane leaflets. We show that the inner face of the cytoplasmic membrane serves as a reliable shelter for metal centers, protecting the complexes from deactivation thus substantially lowering the amount of catalyst needed for effective intracellular catalysis. This MAC-LiFT approach makes it possible to establish catalyst-protective systems with exclusively exogenous agents in a wide array of mammalian cells, allowing convenient and wider use of diverse bioorthogonal reactions in live cellular systems.
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Affiliation(s)
- Yuanyuan Chen
- Institute of Chemical Biology and Nanomedicine, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Tong Wu
- Institute of Chemical Biology and Nanomedicine, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Shasha Xie
- Institute of Chemical Biology and Nanomedicine, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Yugang Bai
- Institute of Chemical Biology and Nanomedicine, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Hang Xing
- Institute of Chemical Biology and Nanomedicine, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
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8
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Deng Y, Wu T, Chen X, Chen Y, Fei Y, Liu Y, Chen Z, Xing H, Bai Y. A Membrane-Embedded Macromolecular Catalyst with Substrate Selectivity in Live Cells. J Am Chem Soc 2023; 145:1262-1272. [PMID: 36525295 DOI: 10.1021/jacs.2c11168] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Substrate selectivity is one of the most attractive features of natural enzymes from their "bind-to-catalyze" working flow and is thus a goal for the development of synthetic enzyme mimics that mediate abiotic transformations. However, despite the recent success in the preparation of substrate-selective enzyme mimics based on single-chain nanoparticles, examples extending such selectivity into living systems have been absent. In this article, we report the in cellulo substrate selectivity of an enzyme-mimicking macromolecular catalyst based on a cationic dense-shell nanoparticle (DSNP) scaffold. With a systematic study on DSNP's structure-activity relationship, we demonstrate that the DSNP has excellent membrane affinity that is governed by several contributing factors, namely, charge density, type of charge, and particle size, and the best-performing phosphonium-rich DSNP can be used as a membrane-embedded catalyst (MEC) for efficient on-membrane synthesis. Importantly, the DSNP catalyst retains its selectivity toward lipophilic and anionic substrates when working as an MEC for on-membrane ligation. The usefulness of such substrate selectivity and on-membrane catalysis strategy was exemplified with several molecules of interest with low cell permeability and anionic nature, which were successfully transported into eukaryotic cells by after their formation directly on the cell membrane.
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Affiliation(s)
- Yingjiao Deng
- State Key Laboratory of Chem-/Bio-Sensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Tong Wu
- State Key Laboratory of Chem-/Bio-Sensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Xianhui Chen
- State Key Laboratory of Chem-/Bio-Sensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Yuanyuan Chen
- State Key Laboratory of Chem-/Bio-Sensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Yating Fei
- State Key Laboratory of Chem-/Bio-Sensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Ying Liu
- State Key Laboratory of Chem-/Bio-Sensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Zhiyong Chen
- State Key Laboratory of Chem-/Bio-Sensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Hang Xing
- State Key Laboratory of Chem-/Bio-Sensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Yugang Bai
- State Key Laboratory of Chem-/Bio-Sensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China
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9
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Blanco C, Fogg DE. Water-Accelerated Decomposition of Olefin Metathesis Catalysts. ACS Catal 2023; 13:1097-1102. [PMID: 36714054 PMCID: PMC9872090 DOI: 10.1021/acscatal.2c05573] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 12/22/2022] [Indexed: 01/04/2023]
Abstract
Water is ubiquitous in olefin metathesis, at levels ranging from contaminant to cosolvent. It is also non-benign. Water-promoted catalyst decomposition competes with metathesis, even for "robust" ruthenium catalysts. Metathesis is hence typically noncatalytic for demanding reactions in water-rich environments (e.g., chemical biology), a challenge as the Ru decomposition products promote unwanted reactions such as DNA degradation. To date, only the first step of the decomposition cascade is understood: catalyst aquation. Here we demonstrate that the aqua species dramatically accelerate both β-elimination of the metallacyclobutane intermediate and bimolecular decomposition of four-coordinate [RuCl(H2O)n(L)(=CHR)]Cl. Decomposition can be inhibited by blocking aquation and β-elimination.
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Affiliation(s)
- Christian
O. Blanco
- Center
for Catalysis Research & Innovation and Department of Chemistry
and Biomolecular Sciences, University of
Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Deryn E. Fogg
- Center
for Catalysis Research & Innovation and Department of Chemistry
and Biomolecular Sciences, University of
Ottawa, Ottawa, Ontario, Canada K1N 6N5,Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway,,
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10
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Schunck NS, Mecking S. In Vivo Olefin Metathesis in Microalgae Upgrades Lipids to Building Blocks for Polymers and Chemicals. Angew Chem Int Ed Engl 2022; 61:e202211285. [PMID: 36062952 PMCID: PMC9827892 DOI: 10.1002/anie.202211285] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Indexed: 01/12/2023]
Abstract
Sustainable sources are key to future chemicals production. Microalgae are promising resources as they fixate carbon dioxide to organic molecules by photosynthesis. Thereby they produce unsaturated fatty acids as established raw materials for the industrial production of chemical building blocks. Although these renewable feedstocks are generated inside cells, their catalytic upgrading to useful products requires in vitro transformations. A synthetic catalysis inside photoautotrophic cells has remained elusive. Here we show that a catalytic conversion of renewable substrates can be realized directly inside living microalgae. Organometallic catalysts remain active inside the cells, enabling in vivo catalytic olefin metathesis as new-to-nature transformation. Stored lipids are converted to long-chain dicarboxylates as valuable building blocks for polymers. This is a key step towards the long-term goal of producing desired renewable chemicals in microalgae as living "cellular factories".
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Affiliation(s)
- Natalie S. Schunck
- Department of ChemistryUniversity of KonstanzUniversitätsstrasse 1078464KonstanzGermany
| | - Stefan Mecking
- Department of ChemistryUniversity of KonstanzUniversitätsstrasse 1078464KonstanzGermany
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