1
|
Kanter JP, Milke L, Metz JK, Biabani A, Schlüter H, Gand M, Ley JP, Zorn H. Novel Catechol O-methyltransferases from Lentinula edodes Catalyze the Generation of Taste-Active Flavonoids. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:11002-11012. [PMID: 38700031 DOI: 10.1021/acs.jafc.4c01514] [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: 05/05/2024]
Abstract
Due to the increasing demand for natural food ingredients, including taste-active compounds, enzyme-catalyzed conversions of natural substrates, such as flavonoids, are promising tools to align with the principles of Green Chemistry. In this study, a novel O-methyltransferase activity was identified in the mycelium of Lentinula edodes, which was successfully applied to generate the taste-active flavonoids hesperetin, hesperetin dihydrochalcone, homoeriodictyol, and homoeriodictyol dihydrochalcone. Furthermore, the mycelium-mediated OMT activity allowed for the conversion of various catecholic substrates, yielding their respective (iso-)vanilloids, while monohydroxylated compounds were not converted. By means of a bottom-up proteomics approach, three putative O-methyltransferases were identified, and subsequently, synthetic, codon-optimized genes were heterologously expressed in Escherichia coli. The purified enzymes confirmed the biocatalytic O-methylation activity against targeted flavonoids containing catechol motifs.
Collapse
Affiliation(s)
- Jean-Philippe Kanter
- Institute of Food Chemistry and Food Biotechnology, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Lars Milke
- Symrise AG, Muehlenfeldstrasse 1, 37603 Holzminden, Germany
| | - Judith K Metz
- Institute of Food Chemistry and Food Biotechnology, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Ali Biabani
- Institute of Clinical Chemistry and Laboratory Medicine, Diagnostic Center, Section Mass Spectrometry & Proteomics, University Medical Center Hamburg-Eppendorf, Campus Research, N27, Martinistr. 52, 20246 Hamburg, Germany
| | - Hartmut Schlüter
- Institute of Clinical Chemistry and Laboratory Medicine, Diagnostic Center, Section Mass Spectrometry & Proteomics, University Medical Center Hamburg-Eppendorf, Campus Research, N27, Martinistr. 52, 20246 Hamburg, Germany
- Institute of Biochemistry and Molecular Biology, University of Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany
| | - Martin Gand
- Institute of Food Chemistry and Food Biotechnology, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Jakob P Ley
- Symrise AG, Muehlenfeldstrasse 1, 37603 Holzminden, Germany
| | - Holger Zorn
- Institute of Food Chemistry and Food Biotechnology, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
- Fraunhofer Institute for Molecular Biology and Applied Ecology, Ohlebergsweg 12, 35394 Giessen, Germany
| |
Collapse
|
2
|
Pérez-Valero Á, Serna-Diestro J, Tafur Rangel A, Barbuto Ferraiuolo S, Schiraldi C, Kerkhoven EJ, Villar CJ, Lombó F. Biosynthesis of Hesperetin, Homoeriodictyol, and Homohesperetin in a Transcriptomics-Driven Engineered Strain of Streptomyces albidoflavus. Int J Mol Sci 2024; 25:4053. [PMID: 38612864 PMCID: PMC11012174 DOI: 10.3390/ijms25074053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 04/01/2024] [Accepted: 04/04/2024] [Indexed: 04/14/2024] Open
Abstract
Flavonoids exhibit various bioactivities including anti-oxidant, anti-tumor, anti-inflammatory, and anti-viral properties. Methylated flavonoids are particularly significant due to their enhanced oral bioavailability, improved intestinal absorption, and greater stability. The heterologous production of plant flavonoids in bacterial factories involves the need for enough biosynthetic precursors to allow for high production levels. These biosynthetic precursors are malonyl-CoA and l-tyrosine. In this work, to enhance flavonoid biosynthesis in Streptomyces albidoflavus, we conducted a transcriptomics study for the identification of candidate genes involved in l-tyrosine catabolism. The hypothesis was that the bacterial metabolic machinery would detect an excess of this amino acid if supplemented with the conventional culture medium and would activate the genes involved in its catabolism towards energy production. Then, by inactivating those overexpressed genes (under an excess of l-tyrosine), it would be possible to increase the intracellular pools of this precursor amino acid and eventually the final flavonoid titers in this bacterial factory. The RNAseq data analysis in the S. albidoflavus wild-type strain highlighted the hppD gene encoding 4-hydroxyphenylpyruvate dioxygenase as a promising target for knock-out, exhibiting a 23.2-fold change (FC) in expression upon l-tyrosine supplementation in comparison to control cultivation conditions. The subsequent knock-out of the hppD gene in S. albidoflavus resulted in a 1.66-fold increase in the naringenin titer, indicating enhanced flavonoid biosynthesis. Leveraging the improved strain of S. albidoflavus, we successfully synthesized the methylated flavanones hesperetin, homoeriodictyol, and homohesperetin, achieving titers of 2.52 mg/L, 1.34 mg/L, and 0.43 mg/L, respectively. In addition, the dimethoxy flavanone homohesperetin was produced as a byproduct of the endogenous metabolism of S. albidoflavus. To our knowledge, this is the first time that hppD deletion was utilized as a strategy to augment the biosynthesis of flavonoids. Furthermore, this is the first report where hesperetin and homoeriodictyol have been synthesized from l-tyrosine as a precursor. Therefore, transcriptomics is, in this case, a successful approach for the identification of catabolism reactions affecting key precursors during flavonoid biosynthesis, allowing the generation of enhanced production strains.
Collapse
Affiliation(s)
- Álvaro Pérez-Valero
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Area of Microbiology, Department of Functional Biology, University of Oviedo, 33006 Oviedo, Principality of Asturias, Spain; (Á.P.-V.); (J.S.-D.); (C.J.V.)
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), 33006 Oviedo, Principality of Asturias, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33006 Oviedo, Principality of Asturias, Spain
| | - Juan Serna-Diestro
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Area of Microbiology, Department of Functional Biology, University of Oviedo, 33006 Oviedo, Principality of Asturias, Spain; (Á.P.-V.); (J.S.-D.); (C.J.V.)
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), 33006 Oviedo, Principality of Asturias, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33006 Oviedo, Principality of Asturias, Spain
| | - Albert Tafur Rangel
- Department of Biology and Biological Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden; (A.T.R.); (E.J.K.)
- Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Simona Barbuto Ferraiuolo
- Section of Biotechnology and Molecular Biology, Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, Via De Crecchio 7, 80138 Naples, Italy; (S.B.F.); (C.S.)
| | - Chiara Schiraldi
- Section of Biotechnology and Molecular Biology, Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, Via De Crecchio 7, 80138 Naples, Italy; (S.B.F.); (C.S.)
| | - Eduard J. Kerkhoven
- Department of Biology and Biological Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden; (A.T.R.); (E.J.K.)
- Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
- SciLifeLab, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Claudio J. Villar
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Area of Microbiology, Department of Functional Biology, University of Oviedo, 33006 Oviedo, Principality of Asturias, Spain; (Á.P.-V.); (J.S.-D.); (C.J.V.)
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), 33006 Oviedo, Principality of Asturias, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33006 Oviedo, Principality of Asturias, Spain
| | - Felipe Lombó
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Area of Microbiology, Department of Functional Biology, University of Oviedo, 33006 Oviedo, Principality of Asturias, Spain; (Á.P.-V.); (J.S.-D.); (C.J.V.)
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), 33006 Oviedo, Principality of Asturias, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33006 Oviedo, Principality of Asturias, Spain
| |
Collapse
|
3
|
Peng B, Zhang L, He S, Oerlemans R, Quax WJ, Groves MR, Haslinger K. Engineering a Plant Polyketide Synthase for the Biosynthesis of Methylated Flavonoids. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:529-539. [PMID: 38109879 PMCID: PMC10786038 DOI: 10.1021/acs.jafc.3c06785] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/30/2023] [Accepted: 12/06/2023] [Indexed: 12/20/2023]
Abstract
Homoeriodictyol and hesperetin are naturally occurring O-methylated flavonoids with many health-promoting properties. They are produced in plants in low abundance and as complex mixtures of similar compounds that are difficult to separate. Synthetic biology offers the opportunity to produce various flavonoids in a targeted, bottom-up approach in engineered microbes with high product titers. However, the production of O-methylated flavonoids is currently still highly inefficient. In this study, we investigated and engineered a combination of enzymes that had previously been shown to support homoeriodictyol and hesperetin production in Escherichia coli from fed O-methylated hydroxycinnamic acids. We determined the crystal structures of the enzyme catalyzing the first committed step of the pathway, chalcone synthase from Hordeum vulgare, in three ligand-bound states. Based on these structures and a multiple sequence alignment with other chalcone synthases, we constructed mutant variants and assessed their performance in E. coli toward producing methylated flavonoids. With our best mutant variant, HvCHS (Q232P, D234 V), we were able to produce homoeriodictyol and hesperetin at 2 times and 10 times higher titers than reported previously. Our findings will facilitate further engineering of this enzyme toward higher production of methylated flavonoids.
Collapse
Affiliation(s)
- Bo Peng
- Chemical
and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, Groningen 9713AV, The Netherlands
| | - Lili Zhang
- XB20
Drug Design, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, Groningen 9713AV, The Netherlands
| | - Siqi He
- Chemical
and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, Groningen 9713AV, The Netherlands
| | - Rick Oerlemans
- XB20
Drug Design, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, Groningen 9713AV, The Netherlands
| | - Wim J. Quax
- Chemical
and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, Groningen 9713AV, The Netherlands
| | - Matthew R. Groves
- XB20
Drug Design, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, Groningen 9713AV, The Netherlands
| | - Kristina Haslinger
- Chemical
and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, Groningen 9713AV, The Netherlands
| |
Collapse
|
4
|
Gao S, Liu XY, Ni R, Fu J, Tan H, Cheng AX, Lou HX. Molecular cloning and functional analysis of 4-coumarate: CoA ligases from Marchantia paleacea and their roles in lignin and flavanone biosynthesis. PLoS One 2024; 19:e0296079. [PMID: 38190396 PMCID: PMC10773943 DOI: 10.1371/journal.pone.0296079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 12/05/2023] [Indexed: 01/10/2024] Open
Abstract
Phenylpropanoids play important roles in plant physiology and the enzyme 4-coumarate: coenzyme A ligase (4CL) catalyzes the formation of thioesters. Despite extensive characterization in various plants, the functions of 4CLs in the liverwort Marchantia paleacea remain unknown. Here, four 4CLs from M. paleacea were isolated and functionally analyzed. Heterologous expression in Escherichia coli indicated the presence of different enzymatic activities in the four enzymes. Mp4CL1 and Mp4CL2 were able to convert caffeic, p-coumaric, cinnamic, ferulic, dihydro-p-coumaric, and 5-hydroxyferulic acids to their corresponding CoA esters, while Mp4CL3 and Mp4CL4 catalyzed none. Mp4CL1 transcription was induced when M. paleacea thalli were treated with methyl jasmonate (MeJA). The overexpression of Mp4CL1 increased the levels of lignin in transgenic Arabidopsis. In addition, we reconstructed the flavanone biosynthetic pathway in E. coli. The pathway comprised Mp4CL1, co-expressed with chalcone synthase (CHS) from different plant species, and the efficiency of biosynthesis was optimal when both the 4CL and CHS were obtained from the same species M. paleacea.
Collapse
Affiliation(s)
- Shuai Gao
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong, China
| | - Xin-Yan Liu
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong, China
| | - Rong Ni
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong, China
| | - Jie Fu
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong, China
| | - Hui Tan
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong, China
| | - Ai-Xia Cheng
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong, China
| | - Hong-Xiang Lou
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong, China
- Shandong Provincial Clinical Research Center for Emergency and Critical Care Medicine, Jinan, Shan-dong, China
| |
Collapse
|
5
|
Hanko EKR, Correia J, Souza CS, Green A, Chromy J, Stoney R, Yan C, Takano E, Lousa D, Soares CM, Breitling R. Microbial production of the plant flavanone hesperetin from caffeic acid. BMC Res Notes 2023; 16:343. [PMID: 37978406 PMCID: PMC10656822 DOI: 10.1186/s13104-023-06620-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 11/07/2023] [Indexed: 11/19/2023] Open
Abstract
OBJECTIVE Hesperetin is an important O-methylated flavonoid produced by citrus fruits and of potential pharmaceutical relevance. The microbial biosynthesis of hesperetin could be a viable alternative to plant extraction, as plant extracts often yield complex mixtures of different flavonoids making it challenging to isolate pure compounds. In this study, hesperetin was produced from caffeic acid in the microbial host Escherichia coli. We combined a previously optimised pathway for the biosynthesis of the intermediate flavanone eriodictyol with a combinatorial library of plasmids expressing three candidate flavonoid O-methyltransferases. Moreover, we endeavoured to improve the position specificity of CCoAOMT7, a flavonoid O-methyltransferase from Arabidopsis thaliana that has been demonstrated to O-methylate eriodictyol in both the para- and meta-position, thus leading to a mixture of hesperetin and homoeriodictyol. RESULTS The best performing flavonoid O-methyltransferase in our screen was found to be CCoAOMT7, which could produce up to 14.6 mg/L hesperetin and 3.8 mg/L homoeriodictyol from 3 mM caffeic acid in E. coli 5-alpha. Using a platform for enzyme engineering that scans the mutational space of selected key positions, predicting their structures using homology modelling and inferring their potential catalytic improvement using docking simulations, we were able to identify a CCoAOMT7 mutant with a two-fold higher position specificity for hesperetin. The mutant's catalytic activity, however, was considerably diminished. Our findings suggest that hesperetin can be created from central carbon metabolism in E. coli following the introduction of a caffeic acid biosynthesis pathway.
Collapse
Affiliation(s)
- Erik K R Hanko
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - João Correia
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157, Oeiras, Portugal
| | - Caio S Souza
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157, Oeiras, Portugal
| | - Alison Green
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Jakub Chromy
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Ruth Stoney
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Cunyu Yan
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Eriko Takano
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Diana Lousa
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157, Oeiras, Portugal
| | - Cláudio M Soares
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157, Oeiras, Portugal
| | - Rainer Breitling
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK.
| |
Collapse
|
6
|
Xue SJ, Liu J, Li XC, Zhang XT, Xin ZZ, Jiang WW, Zhang JY. First Natural Yeast Strain Trichosporon asahii HZ10 with Robust Flavonoid Productivity and Its Potential Biosynthetic Pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023. [PMID: 37909088 DOI: 10.1021/acs.jafc.3c05188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Flavonoids are generally thought to be essential plant natural products with diverse bioactivities and pharmacological effects. Conventional approaches for the industrial production of flavonoids through plant extraction and chemical synthesis face serious economic and environmental challenges. Searching for natural robust flavonoid-producing microorganisms satisfying green and sustainable development is one of the good alternatives. Here, a natural yeast, Trichosporon asahii HZ10, isolated from raw honeycombs, was found to accumulate 146.41 mg/L total flavonoids intracellularly. Also, T. asahii HZ10 represents a broad flavonoid metabolic profiling, covering 40 flavonoids, among which nearly half were silibinin, daidzein, and irigenin trimethyl ether, especially silibinin occupying 21.07% of the total flavonoids. This is the first flavonoid-producing natural yeast strain worldwide. Furthermore, T. asahii HZ10-derived flavonoids represent favorable antioxidant activities. Interestingly, genome mining and transcriptome analysis clearly showed that T. asahii HZ10 possibly evolves a novel flavonoid synthesis pathway for the most crucial step of flavonoid skeleton synthesis, which is different from that in plants and filamentous fungi. Therefore, our results not only enrich the diversity of the natural flavonoid biosynthesis pathway but also pave an alternative way to promote the development of a synthetic biology strategy for the microbial production of flavonoids.
Collapse
Affiliation(s)
- Si-Jia Xue
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao 266109, Shandong, China
| | - Jie Liu
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao 266109, Shandong, China
| | - Xiao-Chen Li
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao 266109, Shandong, China
| | - Xin-Tong Zhang
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao 266109, Shandong, China
| | - Zhao-Zhe Xin
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao 266109, Shandong, China
| | - Wen-Wen Jiang
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao 266109, Shandong, China
| | - Jin-Yong Zhang
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao 266109, Shandong, China
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China
| |
Collapse
|
7
|
Jiang L, Gao Y, Han L, Zhang W, Fan P. Designing plant flavonoids: harnessing transcriptional regulation and enzyme variation to enhance yield and diversity. FRONTIERS IN PLANT SCIENCE 2023; 14:1220062. [PMID: 37575923 PMCID: PMC10420081 DOI: 10.3389/fpls.2023.1220062] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 07/05/2023] [Indexed: 08/15/2023]
Abstract
Plant synthetic biology has emerged as a powerful and promising approach to enhance the production of value-added metabolites in plants. Flavonoids, a class of plant secondary metabolites, offer numerous health benefits and have attracted attention for their potential use in plant-based products. However, achieving high yields of specific flavonoids remains challenging due to the complex and diverse metabolic pathways involved in their biosynthesis. In recent years, synthetic biology approaches leveraging transcription factors and enzyme diversity have demonstrated promise in enhancing flavonoid yields and expanding their production repertoire. This review delves into the latest research progress in flavonoid metabolic engineering, encompassing the identification and manipulation of transcription factors and enzymes involved in flavonoid biosynthesis, as well as the deployment of synthetic biology tools for designing metabolic pathways. This review underscores the importance of employing carefully-selected transcription factors to boost plant flavonoid production and harnessing enzyme promiscuity to broaden flavonoid diversity or streamline the biosynthetic steps required for effective metabolic engineering. By harnessing the power of synthetic biology and a deeper understanding of flavonoid biosynthesis, future researchers can potentially transform the landscape of plant-based product development across the food and beverage, pharmaceutical, and cosmetic industries, ultimately benefiting consumers worldwide.
Collapse
Affiliation(s)
- Lina Jiang
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, China
| | - Yifei Gao
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, China
| | - Leiqin Han
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, China
| | - Wenxuan Zhang
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, China
| | - Pengxiang Fan
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, China
- Key Laboratory of Horticultural Plants Growth and Development, Agricultural Ministry of China, Hangzhou, China
| |
Collapse
|
8
|
Lan HN, Liu RY, Liu ZH, Li X, Li BZ, Yuan YJ. Biological valorization of lignin to flavonoids. Biotechnol Adv 2023; 64:108107. [PMID: 36758651 DOI: 10.1016/j.biotechadv.2023.108107] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 01/12/2023] [Accepted: 01/31/2023] [Indexed: 02/10/2023]
Abstract
Lignin is the most affluent natural aromatic biopolymer on the earth, which is the promising renewable source for valuable products to promote the sustainability of biorefinery. Flavonoids are a class of plant polyphenolic secondary metabolites containing the benzene ring structure with various biological activities, which are largely applied in health food, pharmaceutical, and medical fields. Due to the aromatic similarity, microbial conversion of lignin derived aromatics to flavonoids could facilitate flavonoid biosynthesis and promote the lignin valorization. This review thereby prospects a novel valorization route of lignin to high-value natural products and demonstrates the potential advantages of microbial bioconversion of lignin to flavonoids. The biodegradation of lignin polymers is summarized to identify aromatic monomers as momentous precursors for flavonoid synthesis. The biosynthesis pathways of flavonoids in both plants and strains are introduced and compared. After that, the key branch points and important intermediates are clearly discussed in the biosynthesis pathways of flavonoids. Moreover, the most significant enzyme reactions including Claisen condensation, cyclization and hydroxylation are demonstrated in the biosynthesis pathways of flavonoids. Finally, current challenges and potential future strategies are also discussed for transforming lignin into various flavonoids. The holistic microbial conversion routes of lignin to flavonoids could make a sustainable production of flavonoids and improve the feasibility of lignin valorization.
Collapse
Affiliation(s)
- Hai-Na Lan
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China
| | - Ruo-Ying Liu
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China
| | - Zhi-Hua Liu
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China
| | - Xia Li
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China
| | - Bing-Zhi Li
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China.
| | - Ying-Jin Yuan
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China
| |
Collapse
|
9
|
Parra Daza LE, Suarez Medina L, Tafur Rangel AE, Fernández-Niño M, Mejía-Manzano LA, González-Valdez J, Reyes LH, González Barrios AF. Design and Assembly of a Biofactory for (2 S)-Naringenin Production in Escherichia coli: Effects of Oxygen Transfer on Yield and Gene Expression. Biomolecules 2023; 13:biom13030565. [PMID: 36979500 PMCID: PMC10046166 DOI: 10.3390/biom13030565] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/17/2023] [Accepted: 03/02/2023] [Indexed: 03/30/2023] Open
Abstract
The molecule (2S)-naringenin is a scaffold molecule with several nutraceutical properties. Currently, (2S)-naringenin is obtained through chemical synthesis and plant isolation. However, these methods have several drawbacks. Thus, heterologous biosynthesis has emerged as a viable alternative to its production. Recently, (2S)-naringenin production studies in Escherichia coli have used different tools to increase its yield up to 588 mg/L. In this study, we designed and assembled a bio-factory for (2S)-naringenin production. Firstly, we used several parametrized algorithms to identify the shortest pathway for producing (2S)-naringenin in E. coli, selecting the genes phenylalanine ammonia lipase (pal), 4-coumarate: CoA ligase (4cl), chalcone synthase (chs), and chalcone isomerase (chi) for the biosynthetic pathway. Then, we evaluated the effect of oxygen transfer on the production of (2S)-naringenin at flask (50 mL) and bench (4 L culture) scales. At the flask scale, the agitation rate varied between 50 rpm and 250 rpm. At the bench scale, the dissolved oxygen was kept constant at 5% DO (dissolved oxygen) and 40% DO, obtaining the highest (2S)-naringenin titer (3.11 ± 0.14 g/L). Using genome-scale modeling, gene expression analysis (RT-qPCR) of oxygen-sensitive genes was obtained.
Collapse
Affiliation(s)
- Laura E Parra Daza
- Grupo de Diseño de Productos y Procesos (GDPP), Department of Chemical and Food Engineering, Universidad de Los Andes, Bogotá 110311, Colombia
| | - Lina Suarez Medina
- Grupo de Diseño de Productos y Procesos (GDPP), Department of Chemical and Food Engineering, Universidad de Los Andes, Bogotá 110311, Colombia
| | - Albert E Tafur Rangel
- Grupo de Diseño de Productos y Procesos (GDPP), Department of Chemical and Food Engineering, Universidad de Los Andes, Bogotá 110311, Colombia
| | - Miguel Fernández-Niño
- Grupo de Diseño de Productos y Procesos (GDPP), Department of Chemical and Food Engineering, Universidad de Los Andes, Bogotá 110311, Colombia
- Department of Bioorganic Chemistry, Leibniz-Institute of Plant Biochemistry, 06120 Halle, Germany
| | - Luis Alberto Mejía-Manzano
- Tecnológico de Monterrey, School of Engineering and Science, Av. Eugenio Garza Sada 2501 Sur, Monterrey 64849, NL, Mexico
| | - José González-Valdez
- Tecnológico de Monterrey, School of Engineering and Science, Av. Eugenio Garza Sada 2501 Sur, Monterrey 64849, NL, Mexico
| | - Luis H Reyes
- Grupo de Diseño de Productos y Procesos (GDPP), Department of Chemical and Food Engineering, Universidad de Los Andes, Bogotá 110311, Colombia
| | - Andrés Fernando González Barrios
- Grupo de Diseño de Productos y Procesos (GDPP), Department of Chemical and Food Engineering, Universidad de Los Andes, Bogotá 110311, Colombia
| |
Collapse
|
10
|
Wiles D, Shanbhag BK, O'Brien M, Doblin MS, Bacic A, Beddoe T. Heterologous production of Cannabis sativa-derived specialised metabolites of medicinal significance - Insights into engineering strategies. PHYTOCHEMISTRY 2022; 203:113380. [PMID: 36049526 DOI: 10.1016/j.phytochem.2022.113380] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 08/08/2022] [Accepted: 08/14/2022] [Indexed: 06/15/2023]
Abstract
Cannabis sativa L. has been known for at least 2000 years as a source of important, medically significant specialised metabolites and several bio-active molecules have been enriched from multiple chemotypes. However, due to the many levels of complexity in both the commercial cultivation of cannabis and extraction of its specialised metabolites, several heterologous production approaches are being pursued in parallel. In this review, we outline the recent achievements in engineering strategies used for heterologous production of cannabinoids, terpenes and flavonoids along with their strength and weakness. We provide an overview of the specialised metabolism pathway in C. sativa and a comprehensive list of the specialised metabolites produced along with their medicinal significance. We highlight cannabinoid-like molecules produced by other species. We discuss the key biosynthetic enzymes and their heterologous production using various hosts such as microbial and eukaryotic systems. A brief discussion on complementary production strategies using co-culturing and cell-free systems is described. Various approaches to optimise specialised metabolite production through co-expression, enzyme engineering and pathway engineering are discussed. We derive insights from recent advances in metabolic engineering of hosts with improved precursor supply and suggest their application for the production of C. sativa speciality metabolites. We present a collation of non-conventional hosts with speciality traits that can improve the feasibility of commercial heterologous production of cannabis-based specialised metabolites. We provide a perspective of emerging research in synthetic biology, allied analytical techniques and plant heterologous platforms as focus areas for heterologous production of cannabis specialised metabolites in the future.
Collapse
Affiliation(s)
- Danielle Wiles
- Department of Animal, Plant and Soil Sciences and AgriBio Centre for AgriBioscience, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, Victoria, 3083, Australia; Australian Research Council Research Hub for Medicinal Agriculture, AgriBio Centre for AgriBioscience, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Bhuvana K Shanbhag
- Department of Animal, Plant and Soil Sciences and AgriBio Centre for AgriBioscience, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, Victoria, 3083, Australia; Australian Research Council Research Hub for Medicinal Agriculture, AgriBio Centre for AgriBioscience, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Martin O'Brien
- Department of Animal, Plant and Soil Sciences and AgriBio Centre for AgriBioscience, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, Victoria, 3083, Australia; Australian Research Council Research Hub for Medicinal Agriculture, AgriBio Centre for AgriBioscience, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Monika S Doblin
- Department of Animal, Plant and Soil Sciences and AgriBio Centre for AgriBioscience, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, Victoria, 3083, Australia; Australian Research Council Research Hub for Medicinal Agriculture, AgriBio Centre for AgriBioscience, La Trobe University, Bundoora, VIC, 3086, Australia; La Trobe Institute for Agriculture & Food, Department of Animal, Plant and Soil Science, AgriBio Centre for AgriBioscience, La Trobe University, Bundoora, VIC, Australia
| | - Antony Bacic
- Department of Animal, Plant and Soil Sciences and AgriBio Centre for AgriBioscience, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, Victoria, 3083, Australia; Australian Research Council Research Hub for Medicinal Agriculture, AgriBio Centre for AgriBioscience, La Trobe University, Bundoora, VIC, 3086, Australia; La Trobe Institute for Agriculture & Food, Department of Animal, Plant and Soil Science, AgriBio Centre for AgriBioscience, La Trobe University, Bundoora, VIC, Australia
| | - Travis Beddoe
- Department of Animal, Plant and Soil Sciences and AgriBio Centre for AgriBioscience, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, Victoria, 3083, Australia; Australian Research Council Research Hub for Medicinal Agriculture, AgriBio Centre for AgriBioscience, La Trobe University, Bundoora, VIC, 3086, Australia.
| |
Collapse
|
11
|
Ni R, Niu M, Fu J, Tan H, Zhu TT, Zhang J, Lou HX, Zhang P, Li JX, Cheng AX. Molecular and structural characterization of a promiscuous chalcone synthase from the fern species Stenoloma chusanum. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2022; 64:1935-1951. [PMID: 35920566 DOI: 10.1111/jipb.13335] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
The key enzymes involved in the flavonoid biosynthesis pathway have been extensively studied in seed plants, but relatively less in ferns. In this study, two 4-Coumarate: coenzyme A ligases (Sc4CL1 and Sc4CL2) and one novel chalcone synthase (ScCHS1) were functionally characterized by mining the Stenoloma chusanum transcriptome database. Recombinant Sc4CLs were able to esterify various hydroxycinnamic acids to corresponding acyl-coenzyme A (CoA). ScCHS1 could catalyze p-coumaroyl-CoA, cinnamoyl-CoA, caffeoyl-CoA, and feruloyl-CoA to form naringenin, pinocembrin, eriodictyol, and homoeriodictyol, respectively. Moreover, enzymatic kinetics studies revealed that the optimal substrates of ScCHS1 were feruloyl-CoA and caffeoyl-CoA, rather than p-coumaroyl-CoA, which was substantially different from the common CHSs. Crystallographic and site-directed mutagenesis experiments indicated that the amino acid residues, Leu87, Leu97, Met165, and Ile200, located in the substrate-binding pocket near the B-ring of products, could exert a significant impact on the unique catalytic activity of ScCHS1. Furthermore, overexpression of ScCHS1 in tt4 mutants could partially rescue the mutant phenotypes. Finally, ScCHS1 and Sc4CL1 were used to synthesize flavanones and flavones with multi-substituted hydroxyl and methoxyl B-ring in Escherichia coli, which can effectively eliminate the need for the cytochrome P450 hydroxylation/O-methyltransferase from simple phenylpropanoid acids. In summary, the identification of these important Stenoloma enzymes provides a springboard for the future production of various flavonoids in E. coli.
Collapse
Affiliation(s)
- Rong Ni
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, 250100, China
| | - Meng Niu
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, 250100, China
| | - Jie Fu
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, 250100, China
| | - Hui Tan
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, 250100, China
| | - Ting-Ting Zhu
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, 250100, China
| | - Jing Zhang
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, 250100, China
| | - Hong-Xiang Lou
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, 250100, China
| | - Peng Zhang
- National Key Laboratory of Plant Molecular Genetics, Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Jian-Xu Li
- National Key Laboratory of Plant Molecular Genetics, Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Ai-Xia Cheng
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, 250100, China
| |
Collapse
|
12
|
Liu J, Tian M, Wang Z, Xiao F, Huang X, Shan Y. Production of hesperetin from naringenin in an engineered Escherichia coli consortium. J Biotechnol 2022; 347:67-76. [DOI: 10.1016/j.jbiotec.2022.02.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 02/17/2022] [Accepted: 02/17/2022] [Indexed: 11/17/2022]
|
13
|
Specialized Metabolites from Ribosome Engineered Strains of Streptomyces clavuligerus. Metabolites 2021; 11:metabo11040239. [PMID: 33924621 PMCID: PMC8069389 DOI: 10.3390/metabo11040239] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/27/2021] [Accepted: 04/07/2021] [Indexed: 11/16/2022] Open
Abstract
Bacterial specialized metabolites are of immense importance because of their medicinal, industrial, and agricultural applications. Streptomyces clavuligerus is a known producer of such compounds; however, much of its metabolic potential remains unknown, as many associated biosynthetic gene clusters are silent or expressed at low levels. The overexpression of ribosome recycling factor (frr) and ribosome engineering (induced rpsL mutations) in other Streptomyces spp. has been reported to increase the production of known specialized metabolites. Therefore, we used an overexpression strategy in combination with untargeted metabolomics, molecular networking, and in silico analysis to annotate 28 metabolites in the current study, which have not been reported previously in S. clavuligerus. Many of the newly described metabolites are commonly found in plants, further alluding to the ability of S. clavuligerus to produce such compounds under specific conditions. In addition, the manipulation of frr and rpsL led to different metabolite production profiles in most cases. Known and putative gene clusters associated with the production of the observed compounds are also discussed. This work suggests that the combination of traditional strain engineering and recently developed metabolomics technologies together can provide rapid and cost-effective strategies to further speed up the discovery of novel natural products.
Collapse
|
14
|
Dunstan MS, Robinson CJ, Jervis AJ, Yan C, Carbonell P, Hollywood KA, Currin A, Swainston N, Feuvre RL, Micklefield J, Faulon JL, Breitling R, Turner N, Takano E, Scrutton NS. Engineering Escherichia coli towards de novo production of gatekeeper (2 S)-flavanones: naringenin, pinocembrin, eriodictyol and homoeriodictyol. Synth Biol (Oxf) 2020; 5:ysaa012. [PMID: 33195815 PMCID: PMC7644443 DOI: 10.1093/synbio/ysaa012] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/15/2020] [Accepted: 07/22/2020] [Indexed: 11/13/2022] Open
Abstract
Natural plant-based flavonoids have drawn significant attention as dietary supplements due to their potential health benefits, including anti-cancer, anti-oxidant and anti-asthmatic activities. Naringenin, pinocembrin, eriodictyol and homoeriodictyol are classified as (2S)-flavanones, an important sub-group of naturally occurring flavonoids, with wide-reaching applications in human health and nutrition. These four compounds occupy a central position as branch point intermediates towards a broad spectrum of naturally occurring flavonoids. Here, we report the development of Escherichia coli production chassis for each of these key gatekeeper flavonoids. Selection of key enzymes, genetic construct design and the optimization of process conditions resulted in the highest reported titers for naringenin (484 mg/l), improved production of pinocembrin (198 mg/l) and eriodictyol (55 mg/l from caffeic acid), and provided the first example of in vivo production of homoeriodictyol directly from glycerol (17 mg/l). This work provides a springboard for future production of diverse downstream natural and non-natural flavonoid targets.
Collapse
Affiliation(s)
- Mark S Dunstan
- Manchester aaSynthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M1 7DN, UK
| | - Christopher J Robinson
- Manchester aaSynthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M1 7DN, UK
| | - Adrian J Jervis
- Manchester aaSynthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M1 7DN, UK
| | - Cunyu Yan
- Manchester aaSynthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M1 7DN, UK
| | - Pablo Carbonell
- Manchester aaSynthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M1 7DN, UK
| | - Katherine A Hollywood
- Manchester aaSynthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M1 7DN, UK
| | - Andrew Currin
- Manchester aaSynthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M1 7DN, UK
| | - Neil Swainston
- Manchester aaSynthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M1 7DN, UK
| | - Rosalind Le Feuvre
- Manchester aaSynthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M1 7DN, UK
| | - Jason Micklefield
- Manchester aaSynthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M1 7DN, UK
| | - Jean-Loup Faulon
- Manchester aaSynthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M1 7DN, UK
- MICALIS, INRA-AgroParisTech, Domaine de Vilvert, 78352 Jouy en Josas Cedex, France
| | - Rainer Breitling
- Manchester aaSynthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M1 7DN, UK
| | - Nicholas Turner
- Manchester aaSynthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M1 7DN, UK
| | - Eriko Takano
- Manchester aaSynthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M1 7DN, UK
| | - Nigel S Scrutton
- Manchester aaSynthetic Biology Research Centre for Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology and Department of Chemistry, The University of Manchester, Manchester M1 7DN, UK
| |
Collapse
|