1
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Myburgh MW, Favaro L, van Zyl WH, Viljoen-Bloom M. Engineered yeast for the efficient hydrolysis of polylactic acid. BIORESOURCE TECHNOLOGY 2023; 378:129008. [PMID: 37011843 DOI: 10.1016/j.biortech.2023.129008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/28/2023] [Accepted: 03/31/2023] [Indexed: 06/19/2023]
Abstract
Polylactic acid (PLA) is a major contributor to the global bioplastic production capacity. However, post-consumer PLA waste is not fully degraded during non-optimal traditional organic waste treatment processes and can persist in nature for many years. Efficient enzymatic hydrolysis of PLA would contribute to cleaner, more energy-efficient, environmentally friendly waste management processes. However, high costs and a lack of effective enzyme producers curtail the large-scale application of such enzymatic systems. This study reports the recombinant expression of a fungal cutinase-like enzyme (CLE1) in the yeast Saccharomyces cerevisiae, which produced a crude supernatant that efficiently hydrolyses different types of PLA materials. The codon-optimised Y294[CLEns] strain delivered the best enzyme production and hydrolysis capabilities, releasing up to 9.44 g/L lactic acid from 10 g/L PLA films with more than 40% loss in film weight. This work highlights the potential of fungal hosts producing PLA hydrolases for future commercial applications in PLA recycling.
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Affiliation(s)
- Marthinus W Myburgh
- Department of Microbiology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa; Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE), Padova University, Agripolis, Viale dell'Università 16, 35020 Legnaro, Padova, Italy
| | - Lorenzo Favaro
- Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE), Padova University, Agripolis, Viale dell'Università 16, 35020 Legnaro, Padova, Italy
| | - Willem H van Zyl
- Department of Microbiology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
| | - Marinda Viljoen-Bloom
- Department of Microbiology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa.
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2
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Delangiz N, Aliyar S, Pashapoor N, Nobaharan K, Asgari Lajayer B, Rodríguez-Couto S. Can polymer-degrading microorganisms solve the bottleneck of plastics' environmental challenges? CHEMOSPHERE 2022; 294:133709. [PMID: 35074325 DOI: 10.1016/j.chemosphere.2022.133709] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 11/27/2021] [Accepted: 01/18/2022] [Indexed: 06/14/2023]
Abstract
Increasing world population and industrial activities have enhanced anthropogenic pollution, plastic pollution being especially alarming. So, plastics should be recycled and/or make them biodegradable. Chemical and physical remediating methods are usually energy consuming and costly. In addition, they are not ecofriendly and usually produce toxic byproducts. Bioremediation is a proper option as it is cost-efficient and environmentally friendly. Plastic production and consumption are increasing daily, and, as a consequence, more microorganisms are exposed to these nonbiodegradable polymers. Therefore, investigating new efficient microorganisms and increasing the knowledge about their biology can pave the way for efficient and feasible plastic bioremediation processes. In this sense, omics, systems biology and bioinformatics are three important fields to analyze the biodegradation pathways in microorganisms. Based on the above-mentioned technologies, researchers can engineer microorganisms with specific desired properties to make bioremediation more efficient.
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Affiliation(s)
- Nasser Delangiz
- Department of Plant Biotechnology and Breeding, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
| | - Sajad Aliyar
- Department of Soil Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
| | - Neda Pashapoor
- Department of Soil Science, Faculty of Agriculture, Urmia University, Urmia, Iran
| | | | - Behnam Asgari Lajayer
- Department of Soil Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
| | - Susana Rodríguez-Couto
- Department of Separation Science, LUT School of Engineering Science, LUT University, Sammonkatu 12, FI-50130 Mikkeli, Finland
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3
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Zhang D, Bao Y, Ma Z, Zhou J, Chen H, Lu Y, Zhu L, Chen X. Optimization of fermentation medium and conditions for enhancing valinomycin production by Streptomyces sp. ZJUT-IFE-354. Prep Biochem Biotechnol 2022; 53:157-166. [PMID: 35323097 DOI: 10.1080/10826068.2022.2053991] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Valinomycin is a cyclodepsipeptide antibiotic with a broad spectrum of biological activities, such as antiviral, antitumor, and antifungal activities. However, the low yield of valinomycin often limits its applications in medicine, agriculture, and industry. In our previous report, Streptomyces sp. ZJUT-IFE-354 was identified as a high-yielding strain of valinomycin. In this study, Plackett-Burman design (PBD) and response surface methodology (RSM) were used to optimize components of medium. The optimal medium contained 31 g/L glucose, 22 g/L soybean meal, and 1.6 g/L K2HPO4·3H2O, which could generate 262.47 ± 4.28 mg/L of valinomycin. Then, the culture conditions were optimized by a one-factor-at-a-time (OFAT) approach. The optimal conditions for the strain included a seed age of 24 h, an inoculum size of 8% (v/v), an incubation temperature of 28 °C, an initial pH of 7.2, an elicitor of 0.1% Bacillus cereus feeding at 24 h cultivation, and the feeding of 0.6% L-valine at 36 h cultivation. The final valinomycin production increased to 457.23 ± 9.52 mg/L, which was the highest yield ever reported. It highlights that RSM and OFAT may be efficient methods to enhance valinomycin production by Streptomyces sp. ZJUT-IFE-354.
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Affiliation(s)
- Dong Zhang
- Institute of Fermentation Engineering, Zhejiang University of Technology, Hangzhou, P. R. China.,College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, P. R. China
| | - Yingling Bao
- Institute of Fermentation Engineering, Zhejiang University of Technology, Hangzhou, P. R. China.,College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, P. R. China
| | - Zhi Ma
- Institute of Fermentation Engineering, Zhejiang University of Technology, Hangzhou, P. R. China.,College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, P. R. China
| | - Jiawei Zhou
- Institute of Fermentation Engineering, Zhejiang University of Technology, Hangzhou, P. R. China.,College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, P. R. China
| | - Hanchi Chen
- Institute of Fermentation Engineering, Zhejiang University of Technology, Hangzhou, P. R. China.,College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, P. R. China
| | - Yuele Lu
- Institute of Fermentation Engineering, Zhejiang University of Technology, Hangzhou, P. R. China.,College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, P. R. China
| | - Linjiang Zhu
- Institute of Fermentation Engineering, Zhejiang University of Technology, Hangzhou, P. R. China.,College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, P. R. China
| | - Xiaolong Chen
- Institute of Fermentation Engineering, Zhejiang University of Technology, Hangzhou, P. R. China.,College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, P. R. China
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4
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Alberti C, Enthaler S. Depolymerization of End‐of‐Life Poly(lactide) to Lactide via Zinc‐Catalysis. ChemistrySelect 2020. [DOI: 10.1002/slct.202003979] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Christoph Alberti
- Universität Hamburg Institut für Anorganische und Angewandte Chemie Martin-Luther-King-Platz 6 D-20146 Hamburg Germany
| | - Stephan Enthaler
- Universität Hamburg Institut für Anorganische und Angewandte Chemie Martin-Luther-King-Platz 6 D-20146 Hamburg Germany
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5
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Cheung E, Alberti C, Enthaler S. Chemical Recycling of End-of-Life Poly(lactide) via Zinc-Catalyzed Depolymerization and Polymerization. ChemistryOpen 2020; 9:1224-1228. [PMID: 33304737 PMCID: PMC7705614 DOI: 10.1002/open.202000243] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 10/12/2020] [Indexed: 01/08/2023] Open
Abstract
The chemical recycling of poly(lactide) was investigated based on depolymerization and polymerization processes. Using methanol as depolymerization reagent and zinc salts as catalyst, poly(lactide) was depolymerized to methyl lactate applying microwave heating. An excellent performance was observed for zinc(II) acetate with turnover frequencies of up to 45000 h-1. In a second step the monomer methyl lactate was converted to (pre)poly(lactide) in the presence of catalytic amounts of zinc salts. Here zinc(II) triflate revealed excellent performance for the polymerization process (yield: 91 %, Mn ∼8970 g/mol). Moreover, the (pre)poly(lactide) was depolymerized to lactide, the industrial relevant molecule for accessing high molecular weight poly(lactide), using zinc(II) acetate as catalyst.
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Affiliation(s)
- Even Cheung
- Universität HamburgInstitut für Anorganische und Angewandte ChemieMartin-Luther-King-Platz 6D-20146HamburgGermany
| | - Christoph Alberti
- Universität HamburgInstitut für Anorganische und Angewandte ChemieMartin-Luther-King-Platz 6D-20146HamburgGermany
| | - Stephan Enthaler
- Universität HamburgInstitut für Anorganische und Angewandte ChemieMartin-Luther-King-Platz 6D-20146HamburgGermany
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Alberti C, Kricheldorf HR, Enthaler S. Application of Bismuth Catalysts for the Methanolysis of End‐of‐Life Poly(lactide). ChemistrySelect 2020. [DOI: 10.1002/slct.202003389] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Christoph Alberti
- Universität Hamburg Institut für Anorganische und Angewandte Chemie Martin-Luther-King-Platz 6 D-20146 Hamburg Germany
| | - Hans Rytger Kricheldorf
- Universität Hamburg Institut für Technische und Makromolekulare Chemie Bundesstr. 45 D-20146 Hamburg Germany
| | - Stephan Enthaler
- Universität Hamburg Institut für Anorganische und Angewandte Chemie Martin-Luther-King-Platz 6 D-20146 Hamburg Germany
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7
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Hofmann M, Alberti C, Scheliga F, Meißner RRR, Enthaler S. Tin(ii) 2-ethylhexanoate catalysed methanolysis of end-of-life poly(lactide). Polym Chem 2020. [DOI: 10.1039/d0py00292e] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The depolymerisation of end-of-life poly(lactide) (PLA) goods was studied as part of the chemical recycling of PLA.
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Affiliation(s)
- Melanie Hofmann
- Universität Hamburg
- Institut für Anorganische und Angewandte Chemie
- D-20146 Hamburg
- Germany
| | - Christoph Alberti
- Universität Hamburg
- Institut für Anorganische und Angewandte Chemie
- D-20146 Hamburg
- Germany
| | - Felix Scheliga
- Universität Hamburg
- Institut für Technische und Makromolekulare Chemie
- Universität Hamburg
- D-20146 Hamburg
- Germany
| | - Roderich R. R. Meißner
- Universität Hamburg
- Institut für Anorganische und Angewandte Chemie
- D-20146 Hamburg
- Germany
| | - Stephan Enthaler
- Universität Hamburg
- Institut für Anorganische und Angewandte Chemie
- D-20146 Hamburg
- Germany
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8
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Alberti C, Damps N, Meißner RRR, Enthaler S. Depolymerization of End‐of‐Life Poly(lactide) via 4‐Dimethylaminopyridine‐Catalyzed Methanolysis. ChemistrySelect 2019. [DOI: 10.1002/slct.201901316] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Christoph Alberti
- Institut für Anorganische und Angewandte ChemieUniversität Hamburg Martin-Luther-King-Platz 6, D– 20146 Hamburg Germany
| | - Nicole Damps
- Institut für Anorganische und Angewandte ChemieUniversität Hamburg Martin-Luther-King-Platz 6, D– 20146 Hamburg Germany
| | - Roderich R. R. Meißner
- Institut für Anorganische und Angewandte ChemieUniversität Hamburg Martin-Luther-King-Platz 6, D– 20146 Hamburg Germany
| | - Stephan Enthaler
- Institut für Anorganische und Angewandte ChemieUniversität Hamburg Martin-Luther-King-Platz 6, D– 20146 Hamburg Germany
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9
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Penkhrue W, Sujarit K, Kudo T, Ohkuma M, Masaki K, Aizawa T, Pathom-Aree W, Khanongnuch C, Lumyong S. Amycolatopsis oliviviridis sp. nov., a novel polylactic acid-bioplastic-degrading actinomycete isolated from paddy soil. Int J Syst Evol Microbiol 2018. [PMID: 29517482 DOI: 10.1099/ijsem.0.002682] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A novel bioplastic-degrading actinomycete, strain SCM_MK2-4T, was isolated from paddy soil in Thailand. The 16S rRNA gene sequence showed that strain SCM_MK2-4T belonged to the genus Amycolatopsis, with the highest sequence similarity to Amycolatopsisazurea JCM 3275T (99.4 %), and was phylogenetically clustered with this strain along with Amycolatopsislurida JCM 3141T (99.3 %), A. japonica DSM 44213T (99.2 %), A. decaplanina DSM 44594T (99.0 %), A. roodepoortensis M29T (98.9 %), A. keratiniphilasubsp. nogabecina DSM 44586T (98.8 %), A. keratiniphilasubsp. keratiniphila DSM 44409T (98.5 %), A. orientalis DSM 40040T (98.4 %) and A. regifaucium GY080T (98.3 %). A combination of DNA-DNA hybridization results ranging from 42.8±3.2 to 66.2±1.4 % with the type strains of A. azurea and A. lurida and some different phenotypic characteristics indicated that the strain could be distinguished from its closest phylogenetic neighbours. Whole-cell hydrolysates of the strain were shown to contain meso-diaminopimelic acid, arabinose, galactose, glucose, ribose, mannose, rhamnose and xylose. The predominant menaquinone was MK-9(H4). The major cellular fatty acid profile consisted of iso-C15 : 0, iso-C16 : 0, summed feature 3 (C16 : 1ω7c and/or iso-C15 : 0 2OH) and C16 : 0. The polar lipid composition of the strain consisted of phosphatidyl-N-methylethylethanolamine, phosphatidylethanolamine, hydroxyphosphatidylethanolamine, phosphatidylglycerol, aminophospholipids, an unidentified phospholipid and two unidentified glycolipids. The G+C content of the genomic DNA was 68.2 mol%. On the basis of phylogenetic analyses, DNA-DNA hybridization experimentation and the phenotypic characteristics, it was concluded that strain SCM_MK2-4T represents a novel species of the genus Amycolatopsis, for which the name Amycolatopsis oliviviridis sp. nov. is proposed. The type strain is SCM_MK2-4T (=TBRC 7186T=JCM 32134T).
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Affiliation(s)
- Watsana Penkhrue
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.,Graduate School, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Kanaporn Sujarit
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Takuji Kudo
- Japan Collection of Microorganisms, RIKEN BioResource Center, 3-1-1 Koyadai, Tsukuba, Ibaraki 305-0074, Japan
| | - Moriya Ohkuma
- Japan Collection of Microorganisms, RIKEN BioResource Center, 3-1-1 Koyadai, Tsukuba, Ibaraki 305-0074, Japan
| | - Kazuo Masaki
- National Research Institute of Brewing (NRIB), 3-7-1 Kagamiyama, Higashihiroshima, Hiroshima 739-0046, Japan
| | - Tomoyasu Aizawa
- Faculty of Advanced Life Science, Hokkaido University, N10, W8, Kita-ku, Sapporo 060-0810, Japan.,Global Institution for Collaborative Research and Education, Hokkaido University, N10, W8, Kita-ku, Sapporo 060-0810, Japan
| | - Wasu Pathom-Aree
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.,Science and Technology Research Institute, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Chartchai Khanongnuch
- Division of Biotechnology, Faculty of Agro-Industry, Chiang Mai University, Chiang Mai 50100, Thailand
| | - Saisamorn Lumyong
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.,Science and Technology Research Institute, Chiang Mai University, Chiang Mai 50200, Thailand
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