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Liu J, Bai Y, Ji H, Wang Y, Jin Z, Svensson B. Controlling the Fine Structure of Glycogen-like Glucan by Rational Enzymatic Synthesis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:14951-14960. [PMID: 34847321 DOI: 10.1021/acs.jafc.1c06531] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Glycogen-like glucan (GnG), a hyperbranched glucose polymer, has been receiving increasing attention to generate synthetic polymers and nanoparticles. Importantly, different branching patterns strongly influence the functionality of GnG. To uncover ways of obtaining different GnG branching patterns, a series of GnG with radius from 22.03 to 27.06 nm were synthesized using sucrose phosphorylase, α-glucan phosphorylase (GP), and branching enzyme (BE). Adjusting the relative activity ratio of GP and BE (GP/BE) made the molecular weight (MW) distribution of intermediate GnG products follow two different paths. At a low GP/BE, the GnG developed from "small to large" during the synthetic process, with the MW increasing from 6.15 × 106 to 1.21 × 107 g/mol, and possessed a compact structure. By contrast, a high GP/BE caused the "large to small" model, with the MW reduction of GnG from 1.62 × 107 to 1.21 × 107 g/mol, and created a loose external structure. The higher GP activity promoted the elongation of external chains and restrained chain transfer by the BE to the inner zone of GnG, which would modulate the loose-tight structure of GnG. These findings provide new useful insights into the construction of structurally well-defined nanoparticles.
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Affiliation(s)
- Jialin Liu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Yuxiang Bai
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu 214122, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Hangyan Ji
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Yanli Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Zhengyu Jin
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Birte Svensson
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China
- Department of Biotechnology and Biomedicine, Enzyme and Protein Chemistry, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark
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2
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Ashogbon AO, Akintayo ET, Oladebeye AO, Oluwafemi AD, Akinsola AF, Imanah OE. Developments in the isolation, composition, and physicochemical properties of legume starches. Crit Rev Food Sci Nutr 2020; 61:2938-2959. [DOI: 10.1080/10408398.2020.1791048] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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3
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Affiliation(s)
- Azis Adharis
- Macromolecular Chemistry and New Polymeric MaterialsZernike Institute for Advanced MaterialsUniversity of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Katja Loos
- Macromolecular Chemistry and New Polymeric MaterialsZernike Institute for Advanced MaterialsUniversity of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
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4
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Praveen K, Das S, Dhaware V, Pandey B, Mondal B, Gupta SS. pH-Responsive “Supra-Amphiphilic” Nanoparticles Based on Homoarginine Polypeptides. ACS APPLIED BIO MATERIALS 2019; 2:4162-4172. [DOI: 10.1021/acsabm.9b00432] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Korra Praveen
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research, CSIR-Human Resource Development Centre, Campus Postal Staff College Area, Ghaziabad, 201002 Uttar Pradesh, India
| | - Soumen Das
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research, CSIR-Human Resource Development Centre, Campus Postal Staff College Area, Ghaziabad, 201002 Uttar Pradesh, India
| | - Vinita Dhaware
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research, CSIR-Human Resource Development Centre, Campus Postal Staff College Area, Ghaziabad, 201002 Uttar Pradesh, India
| | - Bhawana Pandey
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research, CSIR-Human Resource Development Centre, Campus Postal Staff College Area, Ghaziabad, 201002 Uttar Pradesh, India
| | - Basudeb Mondal
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Mohanpur, Kolkata 741246, India
| | - Sayam Sen Gupta
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Mohanpur, Kolkata 741246, India
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5
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Adharis A, Ketelaar T, Komarudin AG, Loos K. Synthesis and Self-Assembly of Double-Hydrophilic and Amphiphilic Block Glycopolymers. Biomacromolecules 2019; 20:1325-1333. [PMID: 30653917 PMCID: PMC6415355 DOI: 10.1021/acs.biomac.8b01713] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/14/2019] [Indexed: 01/28/2023]
Abstract
In this report, we present double-hydrophilic block glycopolymers of poly(2-hydroxyethyl methacrylate)- b-poly(2-(β-glucosyloxy)ethyl methacrylate) (PHEMA- b-PGEMA) and amphiphilic block glycopolymers of poly(ethyl methacrylate)- b-PGEMA (PEMA- b-PGEMA) synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization. The block glycopolymers were prepared in two compositions of P(H)EMA macro-chain transfer agents (CTAs) and similar molecular weights of PGEMA. Structural analysis of the resulting polymers as well as the conversion of (H)EMA and GEMA monomers were determined by 1H NMR spectroscopy. Size exclusion chromatography measurements confirmed both P(H)EMA macro-CTAs and block glycopolymers had a low dispersity ( Đ ≤ 1.5). The synthesized block glycopolymers had a degree of polymerization and a molecular weight up to 222 and 45.3 kg mol-1, respectively. Both block glycopolymers self-assembled into micellar structures in aqueous solutions as characterized by fluorescence spectroscopy, ultraviolet-visible spectroscopy, and dynamic light scattering experiments.
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Affiliation(s)
- Azis Adharis
- Macromolecular
Chemistry and New Polymeric Materials, Zernike Institute for Advanced
Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Thomas Ketelaar
- Macromolecular
Chemistry and New Polymeric Materials, Zernike Institute for Advanced
Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Amalina G. Komarudin
- Molecular
Microbiology,
Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - Katja Loos
- Macromolecular
Chemistry and New Polymeric Materials, Zernike Institute for Advanced
Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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6
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Khodadadi Chegeni B, Dadkhah Tehrani A, Adeli M. Glyco-functionalized graphene oxides as green antibacterial absorbent materials. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2018.11.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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7
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Yassaroh Y, Woortman AJJ, Loos K. A new way to improve physicochemical properties of potato starch. Carbohydr Polym 2018; 204:1-8. [PMID: 30366520 DOI: 10.1016/j.carbpol.2018.09.082] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 09/28/2018] [Accepted: 09/29/2018] [Indexed: 11/16/2022]
Abstract
Starch is an important class of macromolecules for human nutrition. However, its rapid digestibility leads to a high amount of glucose released into the blood and contributes to a high risk of obesity and type II diabetes. For these reasons, Heat-moisture treatment (HMT) of the starch was applied prior to complexation with linoleic acid to obtain a desired physicochemical properties while preserving its granular structure. The thermal properties, analyzed by DSC, implied that the HMT enhanced the formation of amylose-linoleic acid complexes, particularly when the complexation was succeeded at 70 °C. The viscosity behavior studied by RVA demonstrated a higher pasting temperature and lower peak viscosity due to less swelling. The granule-like structure remained after complexation at 70 °C for 30 min and followed by RVA to 85 °C. The combination of the HMT and linoleic acid addition improved the stability of the starch granules towards heating and shearing.
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Affiliation(s)
- Yassaroh Yassaroh
- Macromolecular Chemistry and New Polymeric Materials, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, the Netherlands
| | - Albert J J Woortman
- Macromolecular Chemistry and New Polymeric Materials, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, the Netherlands
| | - Katja Loos
- Macromolecular Chemistry and New Polymeric Materials, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, the Netherlands.
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Nishimura T, Akiyoshi K. Amylose engineering: phosphorylase-catalyzed polymerization of functional saccharide primers for glycobiomaterials. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2017; 9:e1423. [PMID: 27506150 PMCID: PMC5333464 DOI: 10.1002/wnan.1423] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 06/26/2016] [Accepted: 07/05/2016] [Indexed: 12/31/2022]
Abstract
Interest in amylose and its hybrids has grown over many decades, and a great deal of work has been devoted to developing methods for designing functional amylose hybrids. In this context, phosphorylase-catalyzed polymerization shows considerable promise as a tool for preparing diverse amylose hybrids. Recently, advances have been made in the chemoenzymatic synthesis and characterization of amylose-block-polymers, amylose-graft-polymers, amylose-modified surfaces, hetero-oligosaccharides, and cellodextrin hybrids. Many of these saccharides provide clear opportunities for advances in biomaterials because of their biocompatibility and biodegradability. Important developments in bioapplications of amylose hybrids have also been made, and such newly developed amylose hybrids will help promote the development of new generations of glyco materials. WIREs Nanomed Nanobiotechnol 2017, 9:e1423. doi: 10.1002/wnan.1423 For further resources related to this article, please visit the WIREs website.
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Affiliation(s)
- Tomoki Nishimura
- Department of Polymer Chemistry, Graduate School of EngineeringKyoto UniversityKyotoJapan
- JST-ERATO Akiyoshi Bionanotransporter ProjectKyotoJapan
| | - Kazunari Akiyoshi
- Department of Polymer Chemistry, Graduate School of EngineeringKyoto UniversityKyotoJapan
- JST-ERATO Akiyoshi Bionanotransporter ProjectKyotoJapan
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Pandey B, Mahato J, Cotta KB, Das S, Sharma DK, Sen Gupta S, Chowdhury A. Glycopolypeptide-Grafted Bioactive Polyionic Complex Vesicles (PICsomes) and Their Specific Polyvalent Interactions. ACS OMEGA 2016; 1:600-612. [PMID: 31457149 PMCID: PMC6640804 DOI: 10.1021/acsomega.6b00142] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 09/28/2016] [Indexed: 05/20/2023]
Abstract
Glycopolypeptide-based self-assembled nano-/microstructures with surface-tethered carbohydrates are excellent mimics of glycoproteins on the cell surface. To expand the broad repertoire of glycopolypeptide-based supramolecular soft structures such as polymersomes formed via self-assembly of amphiphilic polymers, we have developed a new class of polyionic complex vesicles (PICsomes) with glycopolypeptides grafted on the external surface. Oppositely charged hydrophilic block copolymers of glycopolypeptide20-b-poly-l-lysine100 and PEG2k-b-poly-l-glutamate100 [PEG = poly(ethylene glycol)] were synthesized using a combination of ring-opening polymerization of N-carboxyanhydrides and "click" chemistry. Under physiological conditions, the catiomer and aniomer self-assemble to form glycopolypeptide-conjugated PICsomes (GP-PICsomes) of micrometer dimensions. Electron and atomic force microscopy suggests a hollow morphology of the PICsomes, with inner aqueous pool (core) and peripheral PIC (shell) regions. Owing to their relatively large (∼micrometers) size, the hollowness of the supramolecular structure could be established via fluorescence microscopy of single GP-PICsomes, both in solution and under dry conditions, using spatially distributed fluorescent probes. Furthermore, the dynamics of single PICsomes in solution could be imaged in real time, which also allowed us to test for multivalent interactions between PICsomes mediated by a carbohydrate (mannose)-binding protein (lectin, Con-A). The immediate association of several GP-PICsomes in the presence of Con-A and their eventual aggregation to form large insoluble aggregate clusters reveal that upon self-assembly carbohydrate moieties protrude on the outer surface which retains their biochemical activity. Challenge experiments with excess mannose reveal fast deaggregation of GP-PICsomes as opposed to that in the presence of excess galactose, which further establishes the specificity of lectin-mediated polyvalent interactions of the GP-PICsomes.
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Affiliation(s)
- Bhawana Pandey
- Chemical
Engineering Division, CSIR-National Chemical
Laboratory, Dr. Homi
Bhabha Road, Pune 411008, India
- Academy
of Scientific and Innovative Research, (AcSIR), New Delhi 110 025, India
| | - Jaladhar Mahato
- Department of Chemistry and Center for Research
in Nanotechnology and Science, Indian Institute
of Technology Bombay, Powai, Mumbai 400076, India
| | - Karishma Berta Cotta
- Department of Chemistry and Center for Research
in Nanotechnology and Science, Indian Institute
of Technology Bombay, Powai, Mumbai 400076, India
| | - Soumen Das
- Chemical
Engineering Division, CSIR-National Chemical
Laboratory, Dr. Homi
Bhabha Road, Pune 411008, India
- Academy
of Scientific and Innovative Research, (AcSIR), New Delhi 110 025, India
| | - Dharmendar Kumar Sharma
- Department of Chemistry and Center for Research
in Nanotechnology and Science, Indian Institute
of Technology Bombay, Powai, Mumbai 400076, India
| | - Sayam Sen Gupta
- Chemical
Engineering Division, CSIR-National Chemical
Laboratory, Dr. Homi
Bhabha Road, Pune 411008, India
| | - Arindam Chowdhury
- Department of Chemistry and Center for Research
in Nanotechnology and Science, Indian Institute
of Technology Bombay, Powai, Mumbai 400076, India
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Nishimura T, Mukai SA, Sawada SI, Akiyoshi K. Glyco Star Polymers as Helical Multivalent Host and Biofunctional Nano-Platform. ACS Macro Lett 2015; 4:367-371. [PMID: 35596323 DOI: 10.1021/acsmacrolett.5b00049] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of amylose-based star polymers (1, 2, 4, and 8 arms) as a new glyco biomaterial was synthesized by a click reaction and enzymatic polymerization of specific primers with phosphorylase. The molecular weights were controlled by the enzymatic reaction. Further polymerization resulted in a viscous solution and, especially, for the 8-arm primer, a hydrogel was obtained due to effective cross-linking between the multiarmed structures. The star polymers with a degree of polymerization of about 60 per arm acted as an allosteric multivalent host for hydrophobic molecules by helical formation. A cationic 8-arm star polymer catalyzed DNA strand exchange as a nucleic acid chaperone. Amylose-based star polymers are promising building blocks for producing advanced hybrid glyco biomaterials.
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Affiliation(s)
- Tomoki Nishimura
- Department
of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo, Kyoto 615-8150, Japan
- ERATO Akiyoshi
Bio-Nanotransporter Project, JST, Katsura, Nishikyo, Kyoto 615-8150, Japan
| | - Sada-atsu Mukai
- Department
of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo, Kyoto 615-8150, Japan
- ERATO Akiyoshi
Bio-Nanotransporter Project, JST, Katsura, Nishikyo, Kyoto 615-8150, Japan
| | - Shin-ichi Sawada
- Department
of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo, Kyoto 615-8150, Japan
- ERATO Akiyoshi
Bio-Nanotransporter Project, JST, Katsura, Nishikyo, Kyoto 615-8150, Japan
| | - Kazunari Akiyoshi
- Department
of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo, Kyoto 615-8150, Japan
- ERATO Akiyoshi
Bio-Nanotransporter Project, JST, Katsura, Nishikyo, Kyoto 615-8150, Japan
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Fajardo AR, Guerry A, Britta EA, Nakamura CV, Muniz EC, Borsali R, Halila S. Sulfated glycosaminoglycan-based block copolymer: preparation of biocompatible chondroitin sulfate-b-poly(lactic acid) micelles. Biomacromolecules 2014; 15:2691-700. [PMID: 24857763 DOI: 10.1021/bm5005355] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Despite a growing interest in amphiphilic polysaccharide-based diblock copolymers as functional polymeric drug delivery nanosystems, biologically relevant sulfated glycosaminoglycan systems were not yet investigated. Here, we report the synthesis and the self-assembly properties in water of chondroitin sulfate-b-poly(lactic acid) (CS-b-PLA(n)). The CS-b-PLA(n) were synthesized using click-grafting onto method implying reducing-end alkynation of low-molecular weight depolymerized CS (M(w) = 5000 g·mol(-1)) and azide-terminated functionalization of PLAn (M(w) = 6500 g·mol(-1) (n = 46) and M(w) = 1700 g·mol(-1) (n = 20)). The diblock copolymer self-assembled in water giving rise to spherical micelles that were characterized in solution using dynamic/static light scattering and at dry state by TEM technique. In vitro assays on healthy cells showed that at high concentrations, up to 10 μg·mL(-1), CS-b-PLA(n) were noncytotoxic. Those preliminary studies are promising in the perspective to use them as biocompatible nanovehicles for anticancer drug delivery.
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Affiliation(s)
- André R Fajardo
- Centre de Recherches sur les Macromolécules Végétales (CERMAV, UPR-CNRS 5301), Université Grenoble Alpes , BP 53, 38041 Grenoble Cedex 9, France
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Kloosterman WMJ, Brouwer SGM, Loos K. Enzyme-Catalyzed Synthesis of Saccharide Acrylate Monomers from Nonedible Biomass. Chem Asian J 2014; 9:2156-61. [DOI: 10.1002/asia.201402181] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Indexed: 12/21/2022]
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13
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Kloosterman WMJ, Spoelstra-van Dijk G, Loos K. Biocatalytic synthesis of maltodextrin-based acrylates from starch and α-cyclodextrin. Macromol Biosci 2014; 14:1268-79. [PMID: 24863052 DOI: 10.1002/mabi.201400091] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 04/14/2014] [Indexed: 01/10/2023]
Abstract
Novel 2-(β-maltooligooxy)-ethyl (meth)acrylate monomers are successfully synthesized by CGTase from Bacillus macerans catalyzed coupling of 2-(β-glucosyloxy)-ethyl acrylate and methacrylate with α-cyclodextrin or starch. HPLC-UV analysis shows that the CGTase catalyzed reaction yields 2-(β-maltooligooxy)-ethyl acrylates with 1 to 15 glucopyranosyl units. (1) H NMR spectroscopy reveals that the β-linkage in the acceptor molecule is preserved during the CGTase catalyzed coupling reaction, whereas the newly introduced glucose units are attached by α-(1,4)-glycosidic linkages. The synthesized 2-(β-maltooligooxy)-ethyl acrylate monomers are successfully polymerized by aqueous free radical polymerization to yield the comb-shaped glycopolymer poly(2-(β-maltooligooxy)-ethyl acrylate).
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Ciric J, Petrovic DM, Loos K. Polysaccharide Biocatalysis: From Synthesizing Carbohydrate Standards to Establishing Characterization Methods. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201300801] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Jelena Ciric
- Department of Polymer Chemistry & Zernike Institute for Advanced Materials; University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Dejan M. Petrovic
- Department of Polymer Chemistry & Zernike Institute for Advanced Materials; University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Katja Loos
- Department of Polymer Chemistry & Zernike Institute for Advanced Materials; University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
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15
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Ciric J, Woortman AJJ, Gordiichuk P, Stuart MCA, Loos K. Physical properties and structure of enzymatically synthesized amylopectin analogs. STARCH-STARKE 2013. [DOI: 10.1002/star.201300063] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jelena Ciric
- Department of Polymer Chemistry and Zernike Institute for Advanced Materials; University of Groningen; Groningen The Netherlands
| | - Albert J. J. Woortman
- Department of Polymer Chemistry and Zernike Institute for Advanced Materials; University of Groningen; Groningen The Netherlands
| | - Pavlo Gordiichuk
- Department of Polymer Chemistry and Zernike Institute for Advanced Materials; University of Groningen; Groningen The Netherlands
| | - Marc C. A. Stuart
- Groningen Biomolecular Sciences and Biotechnology Institute; University of Groningen; Groningen The Netherlands
| | - Katja Loos
- Department of Polymer Chemistry and Zernike Institute for Advanced Materials; University of Groningen; Groningen The Netherlands
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Mazzocchetti L, Tsoufis T, Rudolf P, Loos K. Enzymatic Synthesis of Amylose Brushes Revisited: Details from X-Ray Photoelectron Spectroscopy and Spectroscopic Ellipsometry. Macromol Biosci 2013; 14:186-94. [DOI: 10.1002/mabi.201300273] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 07/29/2013] [Indexed: 01/13/2023]
Affiliation(s)
- Laura Mazzocchetti
- Zernike Institute for Advanced Materials; University of Groningen; Nijenborgh 4, NL-9747 AG Groningen The Netherlands
| | - Theodoros Tsoufis
- Zernike Institute for Advanced Materials; University of Groningen; Nijenborgh 4, NL-9747 AG Groningen The Netherlands
| | - Petra Rudolf
- Zernike Institute for Advanced Materials; University of Groningen; Nijenborgh 4, NL-9747 AG Groningen The Netherlands
| | - Katja Loos
- Zernike Institute for Advanced Materials; University of Groningen; Nijenborgh 4, NL-9747 AG Groningen The Netherlands
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Rachmawati R, Woortman AJJ, Loos K. Solvent-responsive behavior of inclusion complexes between amylose and polytetrahydrofuran. Macromol Biosci 2013; 14:56-68. [PMID: 23996920 DOI: 10.1002/mabi.201300174] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 07/17/2013] [Indexed: 11/10/2022]
Abstract
Highly crystalline amylose-polytetrahydrofuran (PTHF) complexes can be obtained by employing organic solvents as washing agents after complex formation. The X-ray diffraction (XRD) of the washed complexes appear sharp at 12.9°-13.2° and 19.6°-20.1°, clear signs of the presence of V6I -amylose. Other diffraction peaks correlate with V6II -amylose, which indicates that the complexed amylose helices are in the form of an intermediate or a mixture of V6I - and V6II -amylose. SEM imaging reveals that the amylose-PTHF complexes crystallize in the form of lamellae, which aggregate in a round shape on top of one another with a diameter around 4-8 μm. Some lamellas aggregate as flower-like or flat-surface spherulitic crystals. There is a visible matrix in between the aggregated lamellas which shows that a part of the amylose-PTHF complexes is amorphous.
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Affiliation(s)
- Rachmawati Rachmawati
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747AG, Groningen, The Netherlands
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18
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Rachmawati R, Woortman AJJ, Loos K. Tunable Properties of Inclusion Complexes Between Amylose and Polytetrahydrofuran. Macromol Biosci 2013; 13:767-76. [DOI: 10.1002/mabi.201300022] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 02/19/2013] [Indexed: 01/10/2023]
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19
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Rachmawati R, Woortman AJJ, Loos K. Facile Preparation Method for Inclusion Complexes between Amylose and Polytetrahydrofurans. Biomacromolecules 2013; 14:575-83. [DOI: 10.1021/bm301994u] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Rachmawati Rachmawati
- Department of Polymer
Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands
| | - Albert J. J. Woortman
- Department of Polymer
Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands
| | - Katja Loos
- Department of Polymer
Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands
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Bojarová P, Rosencrantz RR, Elling L, Křen V. Enzymatic glycosylation of multivalent scaffolds. Chem Soc Rev 2013; 42:4774-97. [DOI: 10.1039/c2cs35395d] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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