101
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Müller SS, Frey H. Synthesis of Oxetane-Functional Aliphatic Polyesters via Enzymatic Polycondensation. MACROMOL CHEM PHYS 2012. [DOI: 10.1002/macp.201200269] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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102
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Fersini F, Dall’Antonia Y, Chow J, Streit WR, Mueller-Dieckmann J. Cloning, expression, purification and preliminary X-ray analysis of a putative metagenome-derived lipase. Acta Crystallogr Sect F Struct Biol Cryst Commun 2012; 68:923-6. [PMID: 22869123 PMCID: PMC3412774 DOI: 10.1107/s1744309112025651] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 06/05/2012] [Indexed: 03/22/2024]
Abstract
LipS is a novel thermostable putative lipase that was isolated from a metagenomic library using functional screening methods. The corresponding gene shows high similarity to that encoding a putative but uncharacterized esterase from Symbiobacterium thermophilum IAM14863 (99% nucleotide-sequence similarity). Two different constructs of the recombinant lipase were crystallized. Crystals belonging to space group P4(2)2(1)2 diffracted X-ray radiation to 2.8 Å resolution and crystals belonging to space group P4 diffracted to 2.0 Å resolution. The most probable content of their asymmetric units were two molecules (P4(2)2(1)2) and four or five molecules (P4), respectively.
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Affiliation(s)
- Francesco Fersini
- EMBL Hamburg Outstation, c/o DESY, Notkestrasse 85, 22603 Hamburg, Germany
| | | | - Jennifer Chow
- Department of Microbiology and Biotechnology, Biocenter Klein Flottbek, University of Hamburg, Ohnhorststrasse 18, 22609 Hamburg, Germany
| | - Wolfgang R. Streit
- Department of Microbiology and Biotechnology, Biocenter Klein Flottbek, University of Hamburg, Ohnhorststrasse 18, 22609 Hamburg, Germany
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103
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Debbeche H, Toffano M, Kolodziej E, Fiaud JC, Aribi-Zouioueche L. Insight into the stereoselectivity of PPL-catalyzed formation of polyesters from phenyl glycidyl ether and succinic anhydride. Eur Polym J 2012. [DOI: 10.1016/j.eurpolymj.2012.04.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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104
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105
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Xiong XB, Binkhathlan Z, Molavi O, Lavasanifar A. Amphiphilic block co-polymers: preparation and application in nanodrug and gene delivery. Acta Biomater 2012; 8:2017-33. [PMID: 22406912 DOI: 10.1016/j.actbio.2012.03.006] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Revised: 02/28/2012] [Accepted: 03/02/2012] [Indexed: 11/29/2022]
Abstract
Self-assembly of amphiphilic block co-polymers composed of poly(ethylene oxide) (PEO) as the hydrophilic block and poly(ether)s, poly(amino acid)s, poly(ester)s and polypropyleneoxide (PPO) as the hydrophobic block can lead to the formation of nanoscopic structures of different morphologies. These structures have been the subject of extensive research in the past decade as artificial mimics of lipoproteins and viral vectors for drug and gene delivery. The aim of this review is to provide an overview of the synthesis of commonly used amphiphilic block co-polymers. It will also briefly go over some pharmaceutical applications of amphiphilic block co-polymers as "nanodelivery systems" for small molecules and gene therapeutics.
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106
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Gumel AM, Annuar MSM, Chisti Y, Heidelberg T. Ultrasound assisted lipase catalyzed synthesis of poly-6-hydroxyhexanoate. ULTRASONICS SONOCHEMISTRY 2012; 19:659-667. [PMID: 22105013 DOI: 10.1016/j.ultsonch.2011.10.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Revised: 10/24/2011] [Accepted: 10/27/2011] [Indexed: 05/31/2023]
Abstract
Ultrasonic irradiation greatly improved the Candida antarctica lipase B mediated ring opening polymerization of ε-caprolactone to poly-6-hydroxyhexanoate in the ionic liquid 1-ethyl-3-methylimidazolium tetraflouroborate. Compared to the conventional nonsonicated reaction, sonication improved the monomer conversion by 63% and afforded a polymer product of a narrower molecular weight distribution and a higher degree of crystallinity. Under sonication, the polydispersity index of the product was ~1.44 compared to a value of ~2.55 for the product of the conventional reaction. With sonication, nearly 75% of the monomer was converted to product, but the conversion was only ~16% for the reaction carried out conventionally. Compared to conventional operation, sonication enhanced the rate of polymer propagation by >2-fold and the turnover number of the lipase by >3-fold.
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Affiliation(s)
- A M Gumel
- Faculty of Science, Institute of Biological Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia
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107
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Okuda T, Ishimoto K, Ohara H, Kobayashi S. Renewable Biobased Polymeric Materials: Facile Synthesis of Itaconic Anhydride-Based Copolymers with Poly(l-lactic acid) Grafts. Macromolecules 2012. [DOI: 10.1021/ma300387j] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Tomoya Okuda
- Department of Biobased Materials
Science, Kyoto Institute of Technology,
Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kiyoaki Ishimoto
- Department of Biobased Materials
Science, Kyoto Institute of Technology,
Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hitomi Ohara
- Department of Biobased Materials
Science, Kyoto Institute of Technology,
Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Shiro Kobayashi
- Center for Nanomaterials and
Devices, Kyoto Institute of Technology,
Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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108
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Thermophilic esterase from the archaeon Archaeoglobus fulgidus physically immobilized on hydrophobic macroporous resin: A novel biocatalyst for polyester synthesis. BIOTECHNOL BIOPROC E 2011. [DOI: 10.1007/s12257-011-0260-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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109
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Yang Y, Yu Y, Zhang Y, Liu C, Shi W, Li Q. Lipase/esterase-catalyzed ring-opening polymerization: A green polyester synthesis technique. Process Biochem 2011. [DOI: 10.1016/j.procbio.2011.07.016] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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110
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Ohara H, Nishioka E, Yamaguchi S, Kawai F, Kobayashi S. Protease-Catalyzed Oligomerization and Hydrolysis of Alkyl Lactates Involving l-Enantioselective Deacylation Step. Biomacromolecules 2011; 12:3833-7. [DOI: 10.1021/bm201004g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hitomi Ohara
- Department of Biobased Materials Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku,
Kyoto 606-8585, Japan
| | - Emiko Nishioka
- Department of Biobased Materials Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku,
Kyoto 606-8585, Japan
| | - Syuhei Yamaguchi
- Department of Biobased Materials Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku,
Kyoto 606-8585, Japan
| | - Fusako Kawai
- Center
for Nanomaterials and Devices, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Shiro Kobayashi
- Center
for Nanomaterials and Devices, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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111
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Biocatalytic synthesis of new copolymers from 3-hydroxybutyric acid and a carbohydrate lactone. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcatb.2011.03.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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112
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Li Q, Li G, Ma F, Zhang Z, Zheng B, Feng Y. Highly efficient ring-opening polymerization of ɛ-caprolactone catalyzed by a recombinant Escherichia coli whole-cell biocatalyst. Process Biochem 2011. [DOI: 10.1016/j.procbio.2010.09.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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113
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Strandman S, Gautrot JE, Zhu XX. Recent advances in entropy-driven ring-opening polymerizations. Polym Chem 2011. [DOI: 10.1039/c0py00328j] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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114
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Ohara H, Onogi A, Yamamoto M, Kobayashi S. Lipase-Catalyzed Oligomerization and Hydrolysis of Alkyl Lactates: Direct Evidence in the Catalysis Mechanism That Enantioselection Is Governed by a Deacylation Step. Biomacromolecules 2010; 11:2008-15. [DOI: 10.1021/bm1003674] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hitomi Ohara
- R&D Center for Bio-Based Materials, Department of Bio-Based Materials Science, and Center for Nanomaterials and Devices, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Akihisa Onogi
- R&D Center for Bio-Based Materials, Department of Bio-Based Materials Science, and Center for Nanomaterials and Devices, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Masafumi Yamamoto
- R&D Center for Bio-Based Materials, Department of Bio-Based Materials Science, and Center for Nanomaterials and Devices, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Shiro Kobayashi
- R&D Center for Bio-Based Materials, Department of Bio-Based Materials Science, and Center for Nanomaterials and Devices, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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