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Xu H, Yu B, Wei W, Chen X, Gao C, Liu J, Guo L, Song W, Liu L, Wu J. Improving tyrosol production efficiency through shortening the allosteric signal transmission distance of pyruvate decarboxylase. Appl Microbiol Biotechnol 2023; 107:3535-3549. [PMID: 37099057 DOI: 10.1007/s00253-023-12540-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/22/2023] [Accepted: 04/14/2023] [Indexed: 04/27/2023]
Abstract
Tyrosol is an important chemical in medicine and chemical industries, which can be synthesized by a four-enzyme cascade pathway constructed in our previous study. However, the low catalytic efficiency of pyruvate decarboxylase from Candida tropicalis (CtPDC) in this cascade is a rate-limiting step. In this study, we resolved the crystal structure of CtPDC and investigated the mechanism of allosteric substrate activation and decarboxylation of this enzyme toward 4-hydroxyphenylpyruvate (4-HPP). In addition, based on the molecular mechanism and structural dynamic changes, we conducted protein engineering of CtPDC to improve decarboxylation efficiency. The conversion of the best mutant, CtPDCQ112G/Q162H/G415S/I417V (CtPDCMu5), had over two-fold improvement compared to the wild-type. Molecular dynamic (MD) simulation revealed that the key catalytic distances and allosteric transmission pathways were shorter in CtPDCMu5 than in the wild type. Furthermore, when CtPDC in the tyrosol production cascade was replaced with CtPDCMu5, the tyrosol yield reached 38 g·L-1 with 99.6% conversion and 1.58 g·L-1·h-1 space-time yield in 24 h through further optimization of the conditions. Our study demonstrates that protein engineering of the rate-limiting enzyme in the tyrosol synthesis cascade provides an industrial-scale platform for the biocatalytic production of tyrosol. KEY POINTS: • Protein engineering of CtPDC based on allosteric regulation improved the catalytic efficiency of decarboxylation. • The application of the optimum mutant of CtPDC removed the rate-limiting bottleneck in the cascade. • The final titer of tyrosol reached 38 g·L-1 in 24 h in 3 L bioreactor.
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Affiliation(s)
- Huanhuan Xu
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, 214122, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Bicheng Yu
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, 214122, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Wanqing Wei
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Xiulai Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Cong Gao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Jia Liu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Liang Guo
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Wei Song
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, 214122, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Liming Liu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Jing Wu
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, 214122, China.
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El-Zawawy NA, Ali SS, Nouh HS. Exploring the potential of Rhizopus oryzae AUMC14899 as a novel endophytic fungus for the production of L-tyrosine and its biomedical applications. Microb Cell Fact 2023; 22:31. [PMID: 36804031 PMCID: PMC9942418 DOI: 10.1186/s12934-023-02041-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 02/12/2023] [Indexed: 02/22/2023] Open
Abstract
BACKGROUND A significant threat to the public's health is the rise in antimicrobial resistance among numerous nosocomial bacterial infections. This may be a detriment to present initiatives to enhance the health of immune-compromised patients. Consequently, attention has been devoted to exploring new bioactive compounds in the field of drug discovery from endophytes. Therefore, this study is the first on the production of L-tyrosine (LT) as a promising bio-therapeutic agent from endophytic fungi. RESULTS A new endophytic fungal isolate has been identified for the first time as Rhizopus oryzae AUMC14899 from Opuntia ficus-indica (L.) and submitted to GenBank under the accession number MZ025968. Separation of amino acids in the crude extract of this fungal isolate was carried out, giving a higher content of LT, which is then characterized and purified. LT exhibited strong antibacterial and anti-biofilm activities against multidrug-resistant Gram-negative and Gram-positive bacteria. The recorded minimum inhibitory concentration (MIC) values ranged from 6 to 20 µg/ml. In addition, LT caused a strong reduction in biofilm formation and disrupted the preformed biofilm. Moreover, results indicated that LT supported cell viability, evidencing hemocompatibility and no cytotoxicity. CONCLUSION Our findings suggest that LT has potential as a therapeutic agent due to its potential antibacterial, anti-biofilm, hemocompatibility, and lack of cytotoxic activities, which may also increase the range of therapy options for skin burn infections, leading to the development of a novel fungal-based drug.
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Affiliation(s)
- Nessma A. El-Zawawy
- grid.412258.80000 0000 9477 7793Botany Department, Faculty of Science, Tanta University, Tanta, 31527 Egypt
| | - Sameh Samir Ali
- Botany Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt.
| | - Hoda S. Nouh
- grid.412258.80000 0000 9477 7793Botany Department, Faculty of Science, Tanta University, Tanta, 31527 Egypt
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Liu J, Wang K, Wang M, Deng H, Chen X, Shang Y, Liu X, Yu X. Efficient whole cell biotransformation of tyrosol from L-tyrosine by engineered Escherichia coli. Enzyme Microb Technol 2022; 160:110100. [PMID: 35872508 DOI: 10.1016/j.enzmictec.2022.110100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 07/14/2022] [Accepted: 07/17/2022] [Indexed: 11/03/2022]
Abstract
An engineered Escherichia coli was constructed by co-expressing L-amino acid deaminase, α-keto acid decarboxylase, alcohol dehydrogenase, and glucose dehydrogenase through two plasmids for tyrosol production. The activity of the rate-limiting enzyme L-amino acid deaminase from Cosenzaea myxofaciens (CmAAD) toward tyrosine was improved by structure-guided modification. The enzyme activity of triple mutant CmAAD V438G/K147V/R151E toward tyrosine was ~5.12-fold higher than that of the wild-type CmAAD. Secondly, the plasmid copy numbers and the gene orders were optimized to improve the titer of tyrosol. Finally, the recombinant strain CS-6 transformed 10 mM tyrosine into 9.56 ± 0.64 mM tyrosol at 45 ℃, and the space-time yield reached 0.478 mM·L-1·h-1. This study proposes a novel idea for the efficient and natural production of tyrosol, which has great potential for industrial application.
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Affiliation(s)
- Jinbin Liu
- School of Marine and Bioengineering, YanCheng Institute of Technology, Yancheng, Jiangsu 224051, China
| | - Kaipeng Wang
- School of Marine and Bioengineering, YanCheng Institute of Technology, Yancheng, Jiangsu 224051, China
| | - Mian Wang
- School of Marine and Bioengineering, YanCheng Institute of Technology, Yancheng, Jiangsu 224051, China
| | - Huaxiang Deng
- Center for Synthetic Biochemistry, Institute of Synthetic Biology, Institutes of Advanced Technologies, Shenzhen, China
| | - Xiaodong Chen
- School of Marine and Bioengineering, YanCheng Institute of Technology, Yancheng, Jiangsu 224051, China
| | - Yueling Shang
- School of Marine and Bioengineering, YanCheng Institute of Technology, Yancheng, Jiangsu 224051, China
| | - Xiaochen Liu
- School of Marine and Bioengineering, YanCheng Institute of Technology, Yancheng, Jiangsu 224051, China
| | - Xiaohong Yu
- School of Marine and Bioengineering, YanCheng Institute of Technology, Yancheng, Jiangsu 224051, China.
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4
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Efficient synthesis of tyrosol from L-tyrosine via heterologous Ehrlich pathway in Escherichia coli. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2021.05.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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5
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Abstract
L-tyrosine is a widely used aromatic amino acid with an increasing market demand. Improving the parameters of L-tyrosine production results in a more cost-effective process that is of great interest for industrial applications. E. coli GHLTYR-168 was used to ferment L-tyrosine, with a productivity of 1.73 g/(L·h) and a yield of 17.6%. To further increase its production efficiency, repeated batch fermentation was applied to L-tyrosine, in which both replacement time points and ratios were studied during different fermentations. The broth substitution time point had no significant effect on L-tyrosine subjected to repeated batch fermentation, and 70% broth replacement ratio was the best choice. Repeated batch fermentation was performed in 5 batches within 100 h, among which the efficiency of the third batch fermentation was the highest. In the third batch fermentation, the productivity and yield were 2.53 g/(L·h) and 30.1%, respectively. Compared with that during fed-batch fermentation, the productivity and yield of L-tyrosine increased by 43.8% and 74.0%, respectively, during repeated batch fermentation. This is the highest level of L-tyrosine fermentation reported so far. Thus, repeated batch fermentation of L-tyrosine can improve its production efficiency.
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Affiliation(s)
- Guohua Li
- College of Biological Engineering, Tianjin University of Science and Technology , Tianjin, China
| | - Zhichao Chen
- College of Biological Engineering, Tianjin University of Science and Technology , Tianjin, China
| | - Ning Chen
- College of Biological Engineering, Tianjin University of Science and Technology , Tianjin, China.,National and Local United Engineering Lab of Metabolic Control Fermentation Technology, Tianjin University of Science and Technology , Tianjin, China
| | - Qingyang Xu
- College of Biological Engineering, Tianjin University of Science and Technology , Tianjin, China.,National and Local United Engineering Lab of Metabolic Control Fermentation Technology, Tianjin University of Science and Technology , Tianjin, China
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Arruda GLD, Moraes GKAD, Junior AFC, Araujo AR, Chapla VM. Aromatic compounds from the endophytic fungus Asordaria conoidea and their allelochemical property using OSMAC strategy. Nat Prod Res 2021; 36:3999-4002. [PMID: 33663291 DOI: 10.1080/14786419.2021.1892098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Endophytic fungi are biodiverse and alternative source of bioactive compounds, due their different abilities of genetic expression and alteration of biosynthetic pathway when submitted to different culture conditions. The metabolic profile of three different crude extracts (A, B and C), obtained from the endophytic fungus Asordaria conoidea, were evaluated by HPLC and 1H NMR. Antioxidant and allelochemical activity were also evaluated. OSMAC diversified the metabolic production, mainly in the solid culture, where the tyrosol, 4-hydroxybenzaldehyde, 2-phenylacetamide and vanillic acid were isolated. The structures of the compounds were elucidated mainly by NMR. Extracts had antioxidant potential, however, only Extract C showed allelochemical activity, as inhibition of 65.5% in growth. This study confirms the efficiency of the OSMAC platform in producing extracts of different properties and compounds. Herein the A. conoidea was isolated for the first time as an endophytic microorganism.
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Affiliation(s)
| | | | | | - Angela Regina Araujo
- Organic Chemistry Department, São Paulo State University, UNESP, Chemistry Institute, Araraquara, Brazil
| | - Vanessa Mara Chapla
- Graduate Program in Chemistry, Federal University of Tocantins, UFT, Gurupi, Brazil
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7
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Neuckermans J, Lequeue S, Mertens A, Branson S, Schwaneberg U, De Kock J. High-throughput quantification of ochronotic pigment formation in Escherichia coli to evaluate the potency of human 4-hydroxyphenylpyruvate dioxygenase inhibitors in multi-well format. MethodsX 2020; 8:101181. [PMID: 33365261 PMCID: PMC7749435 DOI: 10.1016/j.mex.2020.101181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/30/2020] [Accepted: 12/08/2020] [Indexed: 02/06/2023] Open
Abstract
4-hydroxyphenylpyruvate dioxygenase (HPD) is a key enzyme in the catabolism of tyrosine and therefore of great importance as a drug target to treat tyrosine-related inherited metabolic disorders (TIMD). Inhibition of this enzyme is therapeutically applied to prevent accumulation of toxic metabolites in TIMD patients. Nowadays an ex-herbicide, nitisinone, is used for this purpose and many more inhibitors are being explored and need to be tested. Here, we describe a colorimetric bacterial whole-cell screening system that allows quantifying the inhibitory effects of new human HPD inhibitors in a high-throughput and robust fashion. For this high-throughput screening (HTS) system we rely on the capability of recombinant E. coli that express human HPD, to generate a brown ochronotic pigment after the addition of tyrosine, whereafter this brown pigment can be quantified in a very specific and sensitive way by spectrophotometric analysis. Altogether, this robust and simple HTS screening system can be described as non-harmful, non-laborious and cost-effective with the aim to identify and evaluate novel therapeutic human HPD inhibitors for the treatment of TIMD.This robust high-throughput screening system enables rapid identification and evaluation of potential inhibitors of human 4-hydroxyphenylpyruvate dioxygenase. Simple and fast colorimetric quantification of the formation of ochronotic pigment.
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Affiliation(s)
- Jessie Neuckermans
- Department of In Vitro Toxicology and Dermato-Cosmetology, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Laarbeeklaan 103, 1090 Brussels, Belgium
| | - Sien Lequeue
- Department of In Vitro Toxicology and Dermato-Cosmetology, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Laarbeeklaan 103, 1090 Brussels, Belgium
| | - Alan Mertens
- Lehrstuhl für Biotechnologie, RWTH Aachen University, Worringerweg 3, 52074 Aachen, Germany
| | - Steven Branson
- Department of In Vitro Toxicology and Dermato-Cosmetology, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Laarbeeklaan 103, 1090 Brussels, Belgium
| | - Ulrich Schwaneberg
- Lehrstuhl für Biotechnologie, RWTH Aachen University, Worringerweg 3, 52074 Aachen, Germany
| | - Joery De Kock
- Department of In Vitro Toxicology and Dermato-Cosmetology, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Laarbeeklaan 103, 1090 Brussels, Belgium
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8
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Robinson CJ, Carbonell P, Jervis AJ, Yan C, Hollywood KA, Dunstan MS, Currin A, Swainston N, Spiess R, Taylor S, Mulherin P, Parker S, Rowe W, Matthews NE, Malone KJ, Le Feuvre R, Shapira P, Barran P, Turner NJ, Micklefield J, Breitling R, Takano E, Scrutton NS. Rapid prototyping of microbial production strains for the biomanufacture of potential materials monomers. Metab Eng 2020; 60:168-182. [PMID: 32335188 PMCID: PMC7225752 DOI: 10.1016/j.ymben.2020.04.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 04/09/2020] [Accepted: 04/16/2020] [Indexed: 12/11/2022]
Abstract
Bio-based production of industrial chemicals using synthetic biology can provide alternative green routes from renewable resources, allowing for cleaner production processes. To efficiently produce chemicals on-demand through microbial strain engineering, biomanufacturing foundries have developed automated pipelines that are largely compound agnostic in their time to delivery. Here we benchmark the capabilities of a biomanufacturing pipeline to enable rapid prototyping of microbial cell factories for the production of chemically diverse industrially relevant material building blocks. Over 85 days the pipeline was able to produce 17 potential material monomers and key intermediates by combining 160 genetic parts into 115 unique biosynthetic pathways. To explore the scale-up potential of our prototype production strains, we optimized the enantioselective production of mandelic acid and hydroxymandelic acid, achieving gram-scale production in fed-batch fermenters. The high success rate in the rapid design and prototyping of microbially-produced material building blocks reveals the potential role of biofoundries in leading the transition to sustainable materials production.
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Affiliation(s)
- Christopher J Robinson
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK.
| | - Pablo Carbonell
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK.
| | - Adrian J Jervis
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK.
| | - Cunyu Yan
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK.
| | - Katherine A Hollywood
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK.
| | - Mark S Dunstan
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK.
| | - Andrew Currin
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK.
| | - Neil Swainston
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK.
| | - Reynard Spiess
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK.
| | - Sandra Taylor
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK.
| | - Paul Mulherin
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK.
| | - Steven Parker
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK.
| | - William Rowe
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK.
| | - Nicholas E Matthews
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK; Manchester Institute of Innovation Research, Alliance Manchester Business School, The University of Manchester, Manchester, M15 6PB, UK.
| | - Kirk J Malone
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK.
| | - Rosalind Le Feuvre
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK.
| | - Philip Shapira
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK; Manchester Institute of Innovation Research, Alliance Manchester Business School, The University of Manchester, Manchester, M15 6PB, UK.
| | - Perdita Barran
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK; Department of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
| | - Nicholas J Turner
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK; Department of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
| | - Jason Micklefield
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK; Department of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
| | - Rainer Breitling
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK; Department of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
| | - Eriko Takano
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK; Department of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
| | - Nigel S Scrutton
- Manchester Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), Manchester Institute of Biotechnology, The University of Manchester, Manchester, M1 7DN, UK; Department of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
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Guo W, Huang Q, Feng Y, Tan T, Niu S, Hou S, Chen Z, Du Z, Shen Y, Fang X. Rewiring central carbon metabolism for tyrosol and salidroside production in
Saccharomyces cerevisiae. Biotechnol Bioeng 2020; 117:2410-2419. [DOI: 10.1002/bit.27370] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 05/01/2020] [Accepted: 05/03/2020] [Indexed: 01/23/2023]
Affiliation(s)
- Wei Guo
- State Key Laboratory of Microbial TechnologyShandong University Qingdao China
| | - Qiulan Huang
- State Key Laboratory of Microbial TechnologyShandong University Qingdao China
| | - Yuhui Feng
- State Key Laboratory of Microbial TechnologyShandong University Qingdao China
| | - Taicong Tan
- State Key Laboratory of Microbial TechnologyShandong University Qingdao China
| | - Suhao Niu
- State Key Laboratory of Microbial TechnologyShandong University Qingdao China
| | - Shaoli Hou
- Yantai Huakangrongzan Biotechnology Co., Ltd.Yantai China
| | - Zhigang Chen
- State Key Laboratory of Microbial TechnologyShandong University Qingdao China
| | - Zhi‐Qiang Du
- State Key Laboratory of Microbial TechnologyShandong University Qingdao China
| | - Yu Shen
- State Key Laboratory of Microbial TechnologyShandong University Qingdao China
| | - Xu Fang
- State Key Laboratory of Microbial TechnologyShandong University Qingdao China
- National Glycoengineering Research CenterShandong University Qingdao China
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Xu W, Yang C, Xia Y, Zhang L, Liu C, Yang H, Shen W, Chen X. High-Level Production of Tyrosol with Noninduced Recombinant Escherichia coli by Metabolic Engineering. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:4616-4623. [PMID: 32208625 DOI: 10.1021/acs.jafc.9b07610] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Tyrosol is a pharmacologically active phenolic compound widely used in the pharmaceutical and chemical industries. Microbial fermentation has potential value as an environmentally friendly approach to tyrosol production, but suffers from low tyrosol yields and the need for expensive media additives. In this study, Escherichia coli MG1655 was modified by integrating an E. coli codon-optimized version of the Saccharomyces cerevisiae phenylpyruvate decarboxylase gene, named ARO10*, into the lacI locus. The resulting strain (YMGA*) produced 0.14 mM tyrosol from 2% glucose without the need for expensive media supplements. Subsequent deletion of E. coli genes designed to eliminate competing metabolic pathways (feaB, pheA, tyrB) or undesirable gene regulation (tyrR) produced a strain (YMGA*R) that produced 3.11 mM tyrosol. Tyrosol production was then increased to 10.92 mM by increasing the ARO10* copy number to five copies (strain YMG5A*R). Finally, tyrosol production was increased to 28 mM (ca. 3.9 g/L) by optimizing fermentation conditions in a 5 L fermenter. Engineering a productive E. coli strain with high tyrosol titer from glucose using a medium that does not require added amino acids, inducer, or antibiotic provides a solid basis to produce tyrosol through microbial fermentation.
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Affiliation(s)
- Wei Xu
- Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Cui Yang
- Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Yuanyuan Xia
- Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Lihua Zhang
- Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Chunxiao Liu
- Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Haiquan Yang
- Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Wei Shen
- Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Xianzhong Chen
- Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- School of Biotechnology, Jiangnan University, Wuxi 214122, China
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11
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A robust bacterial assay for high-throughput screening of human 4-hydroxyphenylpyruvate dioxygenase inhibitors. Sci Rep 2019; 9:14145. [PMID: 31578365 PMCID: PMC6775094 DOI: 10.1038/s41598-019-50533-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 09/13/2019] [Indexed: 01/28/2023] Open
Abstract
Hereditary tyrosinemia type 1 (HT1) and alkaptonuria (AKU) are inherited metabolic disorders caused by defective enzymes involved in tyrosine catabolism. Nitisinone, an ex-herbicide and member of the β-triketone family, is therapeutically applied to prevent accumulation of toxic metabolites in patients by inhibiting the enzyme 4-hydroxyphenylpyruvate dioxygenase (HPD). Here, we developed a colorimetric bacterial whole-cell screening system that allows quantifying the inhibitory effects of human HPD inhibitors in a high-throughput and a robust fashion. The principle of our screening system is based on the degradation of tyrosine through 4-hydroxyphenylpyruvate into homogentisate by human HPD expressed in E. coli and subsequent production of a soluble melanin-like pigment. With the aim to optimise the assay, we tested different E. coli strains, expression and reaction temperatures, and time-points for supplementing the substrate. We found that in our assay the addition of prototypical β-triketone HPD inhibitors decreases pigment production in a dose-dependent manner with increasing inhibitor concentrations. In addition, plate uniformity, signal variability and spatial uniformity assessment showed that we have developed a robust high-throughput screening assay that is simple to use, cost-effective and enables identification and evaluation of novel therapeutic human HPD inhibitors for the treatment of tyrosine-related metabolic disorders.
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