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Fordjour E, Bai Z, Li S, Li S, Sackey I, Yang Y, Liu CL. Improved Membrane Permeability via Hypervesiculation for In Situ Recovery of Lycopene in Escherichia coli. ACS Synth Biol 2023; 12:2725-2739. [PMID: 37607052 DOI: 10.1021/acssynbio.3c00306] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Lycopene biosynthesis is frequently hampered by downstream processing hugely due to its inability to be secreted out from the producing chassis. Engineering cell factories can resolve this issue by secreting this hydrophobic compound. A highly permeable E. coli strain was developed for a better release rate of lycopene. Specifically, the heterologous mevalonate pathway and crtEBI genes from Corynebacterium glutamicum were overexpressed in Escherichia coli BL21 (DE3) for lycopene synthesis. To ensure in situ lycopene production, murein lipoprotein, lipoprotein NlpI, inner membrane permease protein, and membrane-anchored protein in TolA-TolQ-TolR were deleted for improved membrane permeability. The final strain, LYC-8, produced 438.44 ± 8.11 and 136.94 ± 1.94 mg/L of extracellular and intracellular lycopene in fed-batch fermentation. Both proteomics and lipidomics analyses of secreted outer membrane vesicles were perfect indicators of hypervesiculation. Changes in the ratio of saturated fatty acids, unsaturated fatty acids, and cyclopropane fatty acids coupled with the branching and acyl chain lengths altered the membrane fatty acid composition. This ensured membrane fluidity and permeability for in situ lycopene release. The combinatorial deletion of these genes altered the cellular morphology. The structural and morphological changes in cell shape, size, and length were associated with changes in the mechanical strength of the cell envelope. The enhanced lycopene production and secretion mediated by improved membrane permeability established a cell lysis-free system for an efficient releasing rate and downstream processing, demonstrating the importance of vesicle-associated membrane permeability in efficient lycopene production.
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Affiliation(s)
- Eric Fordjour
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center of Cereal Fermentation, and Food Biomanufacturing, Jiangnan University, Wuxi 214122, China
- Jiangsu Provincial Research Centre for Bioactive Product Processing Technology, Jiangnan University, Wuxi 214122, China
| | - Zhonghu Bai
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center of Cereal Fermentation, and Food Biomanufacturing, Jiangnan University, Wuxi 214122, China
- Jiangsu Provincial Research Centre for Bioactive Product Processing Technology, Jiangnan University, Wuxi 214122, China
| | - Sihan Li
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center of Cereal Fermentation, and Food Biomanufacturing, Jiangnan University, Wuxi 214122, China
- Jiangsu Provincial Research Centre for Bioactive Product Processing Technology, Jiangnan University, Wuxi 214122, China
| | - Shijie Li
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center of Cereal Fermentation, and Food Biomanufacturing, Jiangnan University, Wuxi 214122, China
- Jiangsu Provincial Research Centre for Bioactive Product Processing Technology, Jiangnan University, Wuxi 214122, China
| | - Isaac Sackey
- Department of Biological Sciences, Faculty of Biosciences, University for Development Studies, P.O. Box TL1350, NT-0272-1946 Tamale, Ghana
| | - Yankun Yang
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center of Cereal Fermentation, and Food Biomanufacturing, Jiangnan University, Wuxi 214122, China
- Jiangsu Provincial Research Centre for Bioactive Product Processing Technology, Jiangnan University, Wuxi 214122, China
| | - Chun-Li Liu
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center of Cereal Fermentation, and Food Biomanufacturing, Jiangnan University, Wuxi 214122, China
- Jiangsu Provincial Research Centre for Bioactive Product Processing Technology, Jiangnan University, Wuxi 214122, China
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Mu B, Zhu W, Sun J, Zhong J, Wang R, Wang X, Cao J. Enhancement of dewatering from oily sludge by addition of alcohols as cosolvents with dimethyl ether. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Sun J, Zhu W, Mu B, Zhong J, Lin N, Chen S, Li Z. Efficient extraction of biodiesel feedstock and dehydration of kitchen waste: A method based on co-dissolution of liquefied dimethyl ether and water. WASTE MANAGEMENT (NEW YORK, N.Y.) 2022; 147:22-29. [PMID: 35597166 DOI: 10.1016/j.wasman.2022.04.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 04/22/2022] [Accepted: 04/30/2022] [Indexed: 06/15/2023]
Abstract
In the context of low-carbon development, as a waste rich in lipids, kitchen waste (KW) has received increasing attention for resource utilization and low-carbon utilization. In this study, we explored a method for efficient extraction of lipids and dehydration using liquefied dimethyl ether (L-DME) to address the problem of high lipids and the difficulty of dewatering of KW. A closed DME reaction vessel was used to conduct experiments on the effects of lipids extraction and dehydration of KW under different reaction times, mass ratios, temperatures and moisture contents. It was found that DME could extract more than 90% of the lipids and the dehydration rate could reach approximately 80%. The main components of the lipids in the liquid phase extract were fatty acids (C18:2, C18:1, C16:0, and C18:0) whose good thermal properties made them suitable for use as a feedstock for biodiesel production. Moreover, the greatly increased heating value of the solid residue facilitated low-carbon utilization. This study also demonstrated a promotion effect of the co-dissolution system of L-DME and water on the extraction of lipids and explored the related mechanism.
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Affiliation(s)
- Jipeng Sun
- College of Environment, Hohai University, Nanjing 210098, China
| | - Wei Zhu
- College of Environment, Hohai University, Nanjing 210098, China; Taihu Lake Research Center, Institute of Water Science and Technology, Hohai University, Nanjing 210098, China.
| | - Biao Mu
- College of Environment, Hohai University, Nanjing 210098, China
| | - Jun Zhong
- College of Environment, Hohai University, Nanjing 210098, China
| | - Naixi Lin
- Taihu Lake Research Center, Institute of Water Science and Technology, Hohai University, Nanjing 210098, China
| | - Sipeng Chen
- College of Environment, Hohai University, Nanjing 210098, China
| | - Zhuo Li
- College of Environment, Hohai University, Nanjing 210098, China
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Edible Far Eastern Ferns as a Dietary Source of Long-Chain Polyunsaturated Fatty Acids. Foods 2021; 10:foods10061220. [PMID: 34071261 PMCID: PMC8228775 DOI: 10.3390/foods10061220] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/24/2021] [Accepted: 05/25/2021] [Indexed: 01/21/2023] Open
Abstract
Young fronds of ferns are consumed as a vegetable in many countries. The aim of this study was to analyze three fern species that are available for sale in the Russian Far East as dietary sources in terms of fatty acids that are important for human physiology: arachidonic acid (20:4n-6, ARA), eicosapentaenoic acid (20:5n-3, EPA) and other valuable long-chain polyunsaturated fatty acids. The content of ARA and EPA was 5.5 and 0.5 mg/g dry weight, respectively, in Pteridium aquilinum, 4.1 and 1.1 in Matteuccia struthiopteris, and 2.2 and 0.8 in Osmundastrum asiaticum. Salted fronds of P. aquilinum contained less these fatty acids than the raw fronds, with a decrease of up to 49% for ARA and 65% for EPA. These losses were less pronounced or even insignificant in dried fronds. Cooked ferns preserved significant portions of the long-chain polyunsaturated fatty acids: cooked P. aquilinum contained 4.4 mg/g dry weight ARA and 0.3 mg/g dry weight EPA. The ferns may provide a supplemental dietary source of these valuable long-chain polyunsaturated fatty acids, especially for vegetarian diets.
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