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Tong S, Chen W, Hong R, Chai M, Sun Y, Wang Q, Li D. Efficient Mycoprotein Production with Low CO 2 Emissions through Metabolic Engineering and Fermentation Optimization of Fusarium venenatum. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:604-612. [PMID: 38153978 DOI: 10.1021/acs.jafc.3c08509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2023]
Abstract
The global protein shortage is intensifying, and promising means to ensure daily protein supply are desperately needed. The mycoprotein produced by Fusarium venenatum is a good alternative to animal/plant-derived protein. To comprehensively improve the mycoprotein synthesis, a stepwise strategy by blocking the byproduct ethanol synthesis and the gluconeogenesis pathway and by optimizing the fermentation medium was herein employed. Ultimately, compared to the wild-type strain, the synthesis rate, carbon conversion ratio, and protein content of mycoprotein produced from the engineered strain were increased by 57% (0.212 vs 0.135 g/L·h), 62% (0.351 vs 0.217 g/g), and 57% (61.9 vs 39.4%), respectively, accompanied by significant reductions in CO2 emissions. These results provide a referential strategy that could be useful for improving mycoprotein synthesis in other fungi; more importantly, the obtained high-mycoprotein-producing strain has the potential to promote the development of the edible protein industry and compensate for the gap in protein resources.
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Affiliation(s)
- Sheng Tong
- Tianjin Key Laboratory for Industrial Biological Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
- National Innovation Centre for Synthetic Biology, Tianjin 300308, China
| | - Wuxi Chen
- Tianjin Key Laboratory for Industrial Biological Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
- National Innovation Centre for Synthetic Biology, Tianjin 300308, China
| | - Ruru Hong
- Tianjin Key Laboratory for Industrial Biological Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
- National Innovation Centre for Synthetic Biology, Tianjin 300308, China
| | - Mengdan Chai
- Tianjin Key Laboratory for Industrial Biological Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
- National Innovation Centre for Synthetic Biology, Tianjin 300308, China
| | - Yuanxia Sun
- Tianjin Key Laboratory for Industrial Biological Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
- National Innovation Centre for Synthetic Biology, Tianjin 300308, China
| | - Qinhong Wang
- Tianjin Key Laboratory for Industrial Biological Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
- National Innovation Centre for Synthetic Biology, Tianjin 300308, China
| | - Demao Li
- Tianjin Key Laboratory for Industrial Biological Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
- National Innovation Centre for Synthetic Biology, Tianjin 300308, China
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Pawar PMA, Derba-Maceluch M, Chong SL, Gómez LD, Miedes E, Banasiak A, Ratke C, Gaertner C, Mouille G, McQueen-Mason SJ, Molina A, Sellstedt A, Tenkanen M, Mellerowicz EJ. Expression of fungal acetyl xylan esterase in Arabidopsis thaliana improves saccharification of stem lignocellulose. PLANT BIOTECHNOLOGY JOURNAL 2016; 14:387-97. [PMID: 25960248 DOI: 10.1111/pbi.12393] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 03/20/2015] [Accepted: 03/28/2015] [Indexed: 05/08/2023]
Abstract
Cell wall hemicelluloses and pectins are O-acetylated at specific positions, but the significance of these substitutions is poorly understood. Using a transgenic approach, we investigated how reducing the extent of O-acetylation in xylan affects cell wall chemistry, plant performance and the recalcitrance of lignocellulose to saccharification. The Aspergillus niger acetyl xylan esterase AnAXE1 was expressed in Arabidopsis under the control of either the constitutively expressed 35S CAMV promoter or a woody-tissue-specific GT43B aspen promoter, and the protein was targeted to the apoplast by its native signal peptide, resulting in elevated acetyl esterase activity in soluble and wall-bound protein extracts and reduced xylan acetylation. No significant alterations in cell wall composition were observed in the transgenic lines, but their xylans were more easily digested by a β-1,4-endoxylanase, and more readily extracted by hot water, acids or alkali. Enzymatic saccharification of lignocellulose after hot water and alkali pretreatments produced up to 20% more reducing sugars in several lines. Fermentation by Trametes versicolor of tissue hydrolysates from the line with a 30% reduction in acetyl content yielded ~70% more ethanol compared with wild type. Plants expressing 35S:AnAXE1 and pGT43B:AnAXE1 developed normally and showed increased resistance to the biotrophic pathogen Hyaloperonospora arabidopsidis, probably due to constitutive activation of defence pathways. However, unintended changes in xyloglucan and pectin acetylation were only observed in 35S:AnAXE1-expressing plants. This study demonstrates that postsynthetic xylan deacetylation in woody tissues is a promising strategy for optimizing lignocellulosic biomass for biofuel production.
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Affiliation(s)
- Prashant Mohan-Anupama Pawar
- Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå Plant Science Centre, Umeå, Sweden
| | - Marta Derba-Maceluch
- Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå Plant Science Centre, Umeå, Sweden
| | - Sun-Li Chong
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Leonardo D Gómez
- Center for Novel Agricultural Products Department of Biology, University of York, York, UK
| | - Eva Miedes
- Centro de Biotecnología y Genómica de Plantas (UPM-INIA), Universidad Politécnica de Madrid, Pozuelo de Alarcón, Madrid, Spain
| | - Alicja Banasiak
- Institute of Experimental Biology, University of Wroclaw, Wroclaw, Poland
| | - Christine Ratke
- Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå Plant Science Centre, Umeå, Sweden
| | - Cyril Gaertner
- Institut Jean-Pierre Bourgin UMR 1318 INRA/AgroParisTech, Saclay Plant Sciences, Centre de Versailles-Grignon, Versailles Cedex, France
| | - Grégory Mouille
- Institut Jean-Pierre Bourgin UMR 1318 INRA/AgroParisTech, Saclay Plant Sciences, Centre de Versailles-Grignon, Versailles Cedex, France
| | - Simon J McQueen-Mason
- Center for Novel Agricultural Products Department of Biology, University of York, York, UK
| | - Antonio Molina
- Centro de Biotecnología y Genómica de Plantas (UPM-INIA), Universidad Politécnica de Madrid, Pozuelo de Alarcón, Madrid, Spain
| | - Anita Sellstedt
- Department of Plant Physiology, Umea University, Umeå Plant Science Centre, Umeå, Sweden
| | - Maija Tenkanen
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Ewa J Mellerowicz
- Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå Plant Science Centre, Umeå, Sweden
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Horisawa S, Ando H, Ariga O, Sakuma Y. Direct ethanol production from cellulosic materials by consolidated biological processing using the wood rot fungus Schizophyllum commune. BIORESOURCE TECHNOLOGY 2015; 197:37-41. [PMID: 26318920 DOI: 10.1016/j.biortech.2015.08.031] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 08/10/2015] [Accepted: 08/11/2015] [Indexed: 05/28/2023]
Abstract
In the present study, ethanol production from polysaccharides or wood chips was conducted in a single reactor under anaerobic conditions using the white rot fungus Schizophyllum commune NBRC 4928, which produces enzymes that degrade lignin, cellulose and hemicellulose. The ethanol yields produced from glucose and xylose were 80.5%, and 52.5%, respectively. The absolute yields of ethanol per microcrystalline cellulose (MCC), xylan and arabinogalactan were 0.26g/g-MCC, 0.0419g/g-xylan and 0.0508g/g-arabinogalactan, respectively. By comparing the actual ethanol yields from polysaccharides with monosaccharide fermentation, it was shown that the rate of saccharification was slower than that in fermentation. S. commune NBRC 4928 is concluded to be suitable for CBP because it can produce ethanol from various types of sugar. From the autoclaved cedar chip, only little ethanol was produced by S. commune NBRC 4928 alone but ethanol production was enhanced by combined use of ethanol fermenting and lignin degrading fungi.
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Affiliation(s)
- Sakae Horisawa
- School of Environmental Science and Engineering, Kochi University of Technology, 185 Miyanokuchi, Tosayamada, Kami, Kochi 782-8502, Japan.
| | - Hiromasa Ando
- School of Environmental Science and Engineering, Kochi University of Technology, 185 Miyanokuchi, Tosayamada, Kami, Kochi 782-8502, Japan
| | - Osamu Ariga
- School of Environmental Science and Engineering, Kochi University of Technology, 185 Miyanokuchi, Tosayamada, Kami, Kochi 782-8502, Japan
| | - Yoh Sakuma
- Graduate School of Science and Engineering, Ehime University, Matsuyama, Ehime 790-8577, Japan
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Co-cultivation of mutant Penicillium oxalicum SAUE-3.510 and Pleurotus ostreatus for simultaneous biosynthesis of xylanase and laccase under solid-state fermentation. N Biotechnol 2011; 28:616-26. [DOI: 10.1016/j.nbt.2011.05.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Revised: 01/18/2011] [Accepted: 05/19/2011] [Indexed: 11/23/2022]
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