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Xie J, Yu Y, You J, Ye Z, Zhou F, Wang N, Zhong J, Guo L, Lin J. Ganoderma Fusions with High Yield of Ergothioneine and Comparative Analysis of Its Genomics. J Fungi (Basel) 2023; 9:1072. [PMID: 37998877 PMCID: PMC10672712 DOI: 10.3390/jof9111072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 10/10/2023] [Accepted: 10/11/2023] [Indexed: 11/25/2023] Open
Abstract
Ergothioneine (EGT), an exceptional antioxidant found ubiquitously across diverse living organisms, plays a pivotal role in various vital physiological regulatory functions. Its principal natural sources are mushrooms and animal liver tissues. Ganoderma spp., a traditional Chinese food and medicinal mushroom, boasts high concentrations of EGT. To advance the development of novel Ganoderma spp. strains with enhanced EGT yields, we employed an efficient Ganoderma spp. protoplasmic fusion system. Through molecular and biological characterization, we successfully generated seven novel fusion strains. Notably, fusion strain RS7 demonstrated a remarkable increase in mycelial EGT production (12.70 ± 1.85 mg/L), surpassing the parental strains FQ16 and FQ23 by 34.23% and 39.10%, respectively. Furthermore, in the context of the fruiting body, fusion strain RS11 displayed a notable 53.58% enhancement in EGT production (11.24 ± 1.96 mg/L) compared to its parental strains. Genomic analysis of the RS7, the strain with the highest levels of mycelial EGT production, revealed mutations in the gene EVM0005141 associated with EGT metabolism. These mutations led to a reduction in non-productive shunts, subsequently redirecting more substrate towards the EGT synthesis pathway. This redirection significantly boosted EGT production in the RS7 strain. The insights gained from this study provide valuable guidance for the commercial-scale production of EGT and the selective breeding of Ganoderma spp. strains.
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Affiliation(s)
- Jiaqi Xie
- College of Food Science, South China Agricultural University, Guangzhou 510640, China; (J.X.); (Y.Y.); (J.Y.); (F.Z.); (L.G.)
- Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou 510640, China
| | - Yinghao Yu
- College of Food Science, South China Agricultural University, Guangzhou 510640, China; (J.X.); (Y.Y.); (J.Y.); (F.Z.); (L.G.)
- Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou 510640, China
| | - Junjiang You
- College of Food Science, South China Agricultural University, Guangzhou 510640, China; (J.X.); (Y.Y.); (J.Y.); (F.Z.); (L.G.)
- Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou 510640, China
| | - Zhiwei Ye
- College of Food Science, South China Agricultural University, Guangzhou 510640, China; (J.X.); (Y.Y.); (J.Y.); (F.Z.); (L.G.)
- Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou 510640, China
| | - Fenglong Zhou
- College of Food Science, South China Agricultural University, Guangzhou 510640, China; (J.X.); (Y.Y.); (J.Y.); (F.Z.); (L.G.)
- Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou 510640, China
| | - Na Wang
- Guangzhou Alchemy Biotechnology Co., Ltd., 139 Hongming Road Guangzhou Economic Technology Zone, Guangzhou 510760, China; (N.W.); (J.Z.)
| | - Jingru Zhong
- Guangzhou Alchemy Biotechnology Co., Ltd., 139 Hongming Road Guangzhou Economic Technology Zone, Guangzhou 510760, China; (N.W.); (J.Z.)
| | - Liqiong Guo
- College of Food Science, South China Agricultural University, Guangzhou 510640, China; (J.X.); (Y.Y.); (J.Y.); (F.Z.); (L.G.)
- Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou 510640, China
| | - Junfang Lin
- College of Food Science, South China Agricultural University, Guangzhou 510640, China; (J.X.); (Y.Y.); (J.Y.); (F.Z.); (L.G.)
- Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou 510640, China
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Ford T, Cherr G, Gu JD. Shu-Pei Cheng: A life-long pursuit for Environmental Science and Pollution Control. ECOTOXICOLOGY (LONDON, ENGLAND) 2021; 30:1284-1286. [PMID: 34145497 DOI: 10.1007/s10646-021-02438-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/01/2021] [Indexed: 06/12/2023]
Affiliation(s)
- Tim Ford
- Department of Biomedical and Nutritional Sciences, University of Massachusetts Lowell, Lowell, MA, 01854, USA.
| | - Gary Cherr
- Bodega Marine Laboratory, Coastal & Marine Sciences Institute, Departments of Environmental Toxicology and Nutrition, University of California, 2099 Westshore Road, Bodega Bay, P.O. Box 247, Davis, CA, 94923, USA.
| | - Ji-Dong Gu
- Environmental Science and Engineering Group, Guangdong Technion-Israel Institute of Technology, 241 Daxue Road, Shantou, Guangdong, 515063, The People's Republic of China.
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Gulli J, Kroll E, Rosenzweig F. Encapsulation enhances protoplast fusant stability. Biotechnol Bioeng 2020; 117:1696-1709. [PMID: 32100874 PMCID: PMC7318116 DOI: 10.1002/bit.27318] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 02/18/2020] [Accepted: 02/24/2020] [Indexed: 01/13/2023]
Abstract
A barrier to cost‐efficient biomanufacturing is the instability of engineered genetic elements, such as plasmids. Instability can also manifest at the whole‐genome level, when fungal dikaryons revert to parental species due to nuclear segregation during cell division. Here, we show that by encapsulating Saccharomyces cerevisiae‐Pichia stipitis dikaryons in an alginate matrix, we can limit cell division and preserve their expanded metabolic capabilities. As a proxy to cellulosic ethanol production, we tested the capacity of such cells to carry out ethanologenic fermentation of glucose and xylose, examining substrate use, ploidy, and cell viability in relation to planktonic fusants, as well as in relation to planktonic and encapsulated cell cultures consisting of mixtures of these species. Glucose and xylose consumption and ethanol production by encapsulated dikaryons were greater than planktonic controls. Simultaneous co‐fermentation did not occur; rather the order and kinetics of glucose and xylose catabolism by encapsulated dikaryons were similar to cultures where the two species were encapsulated together. Over repeated cycles of fed‐batch culture, encapsulated S. cerevisiae‐P. stipitis fusants exhibited a dramatic increase in genomic stability, relative to planktonic fusants. Encapsulation also increased the stability of antibiotic‐resistance plasmids used to mark each species and preserved a fixed ratio of S. cerevisiae to P. stipitis cells in mixed cultures. Our data demonstrate how encapsulating cells in an extracellular matrix restricts cell division and, thereby, preserves the stability and biological activity of entities ranging from genomes to plasmids to mixed populations, each of which can be essential to cost‐efficient biomanufacturing.
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Affiliation(s)
- Jordan Gulli
- School of Biological Sciences, College of Science, Georgia Institute of Technology, Atlanta, Georgia
| | - Eugene Kroll
- School of Biological Sciences, College of Science, Georgia Institute of Technology, Atlanta, Georgia
| | - Frank Rosenzweig
- School of Biological Sciences, College of Science, Georgia Institute of Technology, Atlanta, Georgia.,Parker Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, Georgia
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