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Kim SR, Cha M, Kim T, Song S, Kang HJ, Jung Y, Cho JY, Moh SH, Kim SJ. Sustainable Production of Shinorine from Lignocellulosic Biomass by Metabolically Engineered Saccharomyces cerevisiae. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:15848-15858. [PMID: 36475725 DOI: 10.1021/acs.jafc.2c07218] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Mycosporine-like amino acids (MAAs) have been used in cosmetics and pharmaceuticals. The purpose of this work was to develop yeast strains for sustainable and economical production of MAAs, especially shinorine. First, genes involved in MAA biosynthetic pathway from Actinosynnema mirum were introduced into Saccharomyces cerevisiae for heterologous shinorine production. Second, combinatorial expression of wild and mutant xylose reductase was adopted in the engineered S. cerevisiae to facilitate xylose utilization in the pentose phosphate pathway. Finally, the accumulation of sedoheptulose 7-phosphate (S7P) was attempted by deleting transaldolase-encoding TAL1 in the pentose phosphate pathway to increase carbon flux toward shinorine production. In fed-batch fermentation, the engineered strain (DXdT-M) produced 751 mg/L shinorine in 71 h. Ultimately, 54 mg/L MAAs was produced by DXdT-M from rice straw hydrolysate. The results suggest that shinorine production by S. cerevisiae might be a promising process for sustainable production and industrial applications.
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Affiliation(s)
- So-Rim Kim
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Minseok Cha
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Taeok Kim
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Sihoon Song
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Hye Jee Kang
- School of Food Science and Biotechnology and Institute of Fermentation Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Younghoon Jung
- School of Food Science and Biotechnology and Institute of Fermentation Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Jeong-Yong Cho
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju 61186, Republic of Korea
- Department of Food Science and Technology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Sang Hyun Moh
- Bio-FD&C Co., Ltd., Incheon 21990, Republic of Korea
| | - Soo-Jung Kim
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju 61186, Republic of Korea
- Department of Food Science and Technology, Chonnam National University, Gwangju 61186, Republic of Korea
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Liu Z, Shi E, Ma F, Jiang K. An integrated biorefinery process for co-production of xylose and glucose using maleic acid as efficient catalyst. BIORESOURCE TECHNOLOGY 2021; 325:124698. [PMID: 33465645 DOI: 10.1016/j.biortech.2021.124698] [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] [Received: 11/30/2020] [Revised: 01/05/2021] [Accepted: 01/06/2021] [Indexed: 06/12/2023]
Abstract
This study aims to valorize wheat straw for xylose and glucose recovery using maleic acid in the pretreatment. The process conditions of maleic acid hydrolysis of wheat straw for xylose recovery were optimized by response surface methodology, through which the maximum xylose recovery of 77.12% versus minimum furfural yield of 1.61% were achieved using 70 g/L solid-to-liquid ratio and 0.1 mol/L maleic acid for 40 min at 150 °C. Moreover, 88.58% cellulose conversion was achieved by enzymatic hydrolysis of maleic acid-pretreated wheat straw. Results showed that maleic acid was an effective pretreatment solvent for sugars recovery: 19.88 g xylose and 30.89 g glucose were respectively obtained from 100 g wheat straw due to acidic and enzymatic hydrolysis, with only 0.37 g furfural produced. This study provides a strategy for hydrolyzing wheat straw to produce fermentable sugars with low amount of degradation product.
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Affiliation(s)
- Zhenghui Liu
- School of Basic Medical Sciences and Forensic Medicine, Hangzhou Medical College, Hangzhou 310053, People's Republic of China
| | - Enze Shi
- School of Basic Medical Sciences and Forensic Medicine, Hangzhou Medical College, Hangzhou 310053, People's Republic of China
| | - Feng Ma
- School of Basic Medical Sciences and Forensic Medicine, Hangzhou Medical College, Hangzhou 310053, People's Republic of China
| | - Kankan Jiang
- School of Basic Medical Sciences and Forensic Medicine, Hangzhou Medical College, Hangzhou 310053, People's Republic of China.
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Kim DH, Park HM, Jung YH, Sukyai P, Kim KH. Pretreatment and enzymatic saccharification of oak at high solids loadings to obtain high titers and high yields of sugars. BIORESOURCE TECHNOLOGY 2019; 284:391-397. [PMID: 30959376 DOI: 10.1016/j.biortech.2019.03.134] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 03/26/2019] [Accepted: 03/27/2019] [Indexed: 05/28/2023]
Abstract
Production of high-titer sugar from lignocellulose is important in terms of process economics of bio-based product industry. In this study, to obtain high titers and yields of sugars, we combined pretreatment and saccharification steps, both at high solids loadings. First, pretreatment of oak was optimized at a 30% (w/w) solids loading. The whole slurry of the pretreated oak was subjected to a fed-batch saccharification step at the final solids loading of 30%, to minimize loss of fermentable sugars and simplify the processes. As a result, high-titer sugars (157.5 g/L) consisting of 120.2 g/L of glucose and 37.3 g/L of xylose were obtained at 75.9% and 58.6%, respectively, of theoretical maximum yields, based on the initial glucan and xylan contents. Thus, through proper optimization processes of oak, the combination of pretreatment and saccharification at high solids loadings was effective in obtaining both high titers and high yields of sugars from lignocellulose.
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Affiliation(s)
- Dong Hyun Kim
- Department of Biotechnology, Graduate School, Korea University, Seoul 02841, South Korea
| | - Hyun Min Park
- Department of Biotechnology, Graduate School, Korea University, Seoul 02841, South Korea
| | - Young Hoon Jung
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, South Korea
| | - Prakit Sukyai
- Biotechnology of Biopolymers and Bioactive Compounds Special Research Unit, Department of Biotechnology, Faculty of Agro-Industry, Kasetsart University, Chatuchak, Bangkok 10900, Thailand
| | - Kyoung Heon Kim
- Department of Biotechnology, Graduate School, Korea University, Seoul 02841, South Korea.
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Huang J, Xia T, Li G, Li X, Li Y, Wang Y, Wang Y, Chen Y, Xie G, Bai FW, Peng L, Wang L. Overproduction of native endo-β-1,4-glucanases leads to largely enhanced biomass saccharification and bioethanol production by specific modification of cellulose features in transgenic rice. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:11. [PMID: 30636971 PMCID: PMC6325865 DOI: 10.1186/s13068-018-1351-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 12/29/2018] [Indexed: 05/03/2023]
Abstract
BACKGROUND Genetic modification of plant cell walls has been implemented to reduce lignocellulosic recalcitrance for biofuel production. Plant glycoside hydrolase family 9 (GH9) comprises endo-β-1,4-glucanase in plants. Few studies have examined the roles of GH9 in cell wall modification. In this study, we independently overexpressed two genes from GH9B subclasses (OsGH9B1 and OsGH9B3) and examined cell wall features and biomass saccharification in transgenic rice plants. RESULTS Compared with the wild type (WT, Nipponbare), the OsGH9B1 and OsGH9B3 transgenic rice plants, respectively, contained much higher OsGH9B1 and OsGH9B3 protein levels and both proteins were observed in situ with nonspecific distribution in the plant cells. The transgenic lines exhibited significantly increased cellulase activity in vitro than the WT. The OsGH9B1 and OsGH9B3 transgenic plants showed a slight alteration in three wall polymer compositions (cellulose, hemicelluloses, and lignin), in their stem mechanical strength and biomass yield, but were significantly decreased in the cellulose degree of polymerization (DP) and lignocellulose crystalline index (CrI) by 21-22%. Notably, the crude cellulose substrates of the transgenic lines were more efficiently digested by cellobiohydrolase (CBHI) than those of the WT, indicating the significantly increased amounts of reducing ends of β-1,4-glucans in cellulose microfibrils. Finally, the engineered lines generated high sugar yields after mild alkali pretreatments and subsequent enzymatic hydrolysis, resulting in the high bioethanol yields obtained at 22.5% of dry matter. CONCLUSIONS Overproduction of OsGH9B1/B3 enzymes should have specific activity in the postmodification of cellulose microfibrils. The increased reducing ends of β-1,4-glucan chains for reduced cellulose DP and CrI positively affected biomass enzymatic saccharification. Our results demonstrate a potential strategy for genetic modification of cellulose microfibrils in bioenergy crops.
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Affiliation(s)
- Jiangfeng Huang
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, School of Life Sciences, Inner Mongolia University, Hohhot, 010070 China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, Guangxi University, Nanning, 530004 China
| | - Tao Xia
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
| | - Guanhua Li
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, School of Life Sciences, Inner Mongolia University, Hohhot, 010070 China
| | - Xianliang Li
- College of Bioengineering, Jingchu University of Technology, Jingmen, 448000 China
| | - Ying Li
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
| | - Yanting Wang
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
| | - Youmei Wang
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
| | - Yuanyuan Chen
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
| | - Guosheng Xie
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
| | - Feng-Wu Bai
- State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240 China
| | - Liangcai Peng
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
- State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240 China
| | - Lingqiang Wang
- Biomass and Bioenergy Research Centre, College of Plant Science and Technology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070 China
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Yao K, Wu Q, An R, Meng W, Ding M, Li B, Yuan Y. Hydrothermal pretreatment for deconstruction of plant cell wall: Part II. Effect on cellulose structure and bioconversion. AIChE J 2018. [DOI: 10.1002/aic.16106] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kun Yao
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering; Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Qinfeng Wu
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering; Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Ran An
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering; Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Wei Meng
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering; Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Mingzhu Ding
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering; Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Bingzhi Li
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering; Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Yingjin Yuan
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering; Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
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Dong C, Wang Y, Zhang H, Leu SY. Feasibility of high-concentration cellulosic bioethanol production from undetoxified whole Monterey pine slurry. BIORESOURCE TECHNOLOGY 2018; 250:102-109. [PMID: 29161568 DOI: 10.1016/j.biortech.2017.11.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 11/08/2017] [Accepted: 11/09/2017] [Indexed: 05/15/2023]
Abstract
The economic feasibility of high-concentration cellulosic bioethanol production remains challenging because it requires easily available feedstock and low energy consumption process. Simultaneous saccharification and fermentation (SSF) of sulfite pretreated Momentary pine slurry at 20% (w/w) loadings increased ethanol concentration from 59.3 g/L to 68.5 g/L by washing strategy. Effects of inhibitors in pretreatment liquor were further investigated. Besides HMF, furfural and acetic acid, other inhibitors and/or their synergistic effects proved to be responsible for a lower fermentability. To bypass the inhibition and achieve high-efficient bioethanol concentration, a fermentation temperature of 28 °C was optimized for both cell growth and ethanol production. Under the optimal conditions with prehydrolyzed 25% (w/w) whole undetoxified slurry, a high ethanol concentration (up to 82.1 g/L) were produced with a yield of 205 kg/ton Monterey pine in the SSF. Thus, this high cellulosic bioethanol production from Monterey pine makes it a potential strategy for biofuel production.
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Affiliation(s)
- Chengyu Dong
- Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong Special Administrative Region
| | - Ying Wang
- Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong Special Administrative Region.
| | - Han Zhang
- Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong Special Administrative Region
| | - Shao-Yuan Leu
- Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong Special Administrative Region.
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8
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Ethanol and hydrogen production from sunflower straw: The effect of pretreatment on the whole slurry fermentation. Biochem Eng J 2016. [DOI: 10.1016/j.bej.2016.06.014] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Biomass pretreatments capable of enabling lignin valorization in a biorefinery process. Curr Opin Biotechnol 2016; 38:39-46. [PMID: 26780496 DOI: 10.1016/j.copbio.2015.12.018] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 12/28/2015] [Accepted: 12/30/2015] [Indexed: 11/24/2022]
Abstract
Recent techno-economic studies of proposed lignocellulosic biorefineries have concluded that creating value from lignin will assist realization of biomass utilization into valuable fuels, chemicals, and materials due to co-valorization and the new revenues beyond carbohydrates. The pretreatment step within a biorefinery process is essential for recovering carbohydrates, but different techniques and intensities have a variety of effects on lignin. Acidic and alkaline pretreatments have been shown to produce diverse lignins based on delignification chemistry. The valorization potential of pretreated lignin is affected by its chemical structure, which is known to degrade, including inter-lignin condensation under high-severity pretreatment. Co-valorization of lignin and carbohydrates will require dampening of pretreatment intensities to avoid such effects, in spite of tradeoffs in carbohydrate production.
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Jung YH, Park HM, Kim DH, Park YC, Seo JH, Kim KH. Combination of high solids loading pretreatment and ethanol fermentation of whole slurry of pretreated rice straw to obtain high ethanol titers and yields. BIORESOURCE TECHNOLOGY 2015; 198:861-866. [PMID: 26461793 DOI: 10.1016/j.biortech.2015.09.102] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Revised: 09/19/2015] [Accepted: 09/21/2015] [Indexed: 06/05/2023]
Abstract
In cellulosic ethanol production using lignocellulose, an increase in biomass solids loading during the pretreatment process significantly affects the final ethanol titer and the production cost. In this study, pretreatment using rice straw at high solids loading (20% (w/v)) was evaluated, using maleic acid as a catalyst. After pretreatment at optimal conditions of 190°C, 20 min, and 0.2% or 5% (w/v) maleic acid, the highest enzymatic digestibility obtained was over 80%. Simultaneous saccharification and fermentation (SSF) of the whole slurry of pretreated rice straw in the presence of activated carbon to separate inhibitory compounds generated a high ethanol yield of 62.8%, based on the initial glucan in unpretreated rice straw. These findings suggest that high solids loading pretreatment using maleic acid and SSF of the whole slurry of pretreated rice straw can be combined to improve the process economics of ethanol production.
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Affiliation(s)
- Young Hoon Jung
- Department of Biotechnology, Graduate School, Korea University, Seoul 136-713, Republic of Korea
| | - Hyun Min Park
- Department of Biotechnology, Graduate School, Korea University, Seoul 136-713, Republic of Korea
| | - Dong Hyun Kim
- Department of Biotechnology, Graduate School, Korea University, Seoul 136-713, Republic of Korea
| | - Yong-Cheol Park
- Department of Bio and Fermentation Convergence Technology, Kookmin University, Seoul 136-702, Republic of Korea
| | - Jin-Ho Seo
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
| | - Kyoung Heon Kim
- Department of Biotechnology, Graduate School, Korea University, Seoul 136-713, Republic of Korea.
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