1
|
Tsvetikova SA, Zabavkina AA, Ivankova O, Koshel EI. Cellular Effects of Enterobacteriaceae Polysaccharide Colanic Acid. Int J Mol Sci 2024; 25:8017. [PMID: 39125588 PMCID: PMC11312057 DOI: 10.3390/ijms25158017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 07/14/2024] [Accepted: 07/18/2024] [Indexed: 08/12/2024] Open
Abstract
Colanic acid (CA) is an exopolysaccharide found in Enterobacteriaceae. Recently, its ability to stimulate physical activity in mice and to prolong the lifespan of invertebrates has been described. In the current work, we use standard MTT assay, fluorescence microscopy, and flow cytometry to describe CA action on several cell lines of different origins. We observed slight antiproliferative activity against colorectal cancer (HCT-116), neuroblastoma (IMR-32), and myoblast (C2C12) cell lines at a concentration of 256 μg/mL, while other cell lines of non-cancerous origin (Vero, HPF) did not show any decrease in the MTT assay. In all cell lines, we observed a rearrangement of mitochondria localization using fluorescence microscopy. CA induces cell differentiation in the myoblast cell line (C2C12) at concentrations of 50-200 μg/mL. Briefly, we observed that the number of apoptotic cells increased and the metabolic activity in the MTT assay decreased, which was accompanied by changes in cell morphology, the quantity of ROS, and the potential of the mitochondrial membrane. Taken together, these results indicate that CA is specific in cytotoxicity to cell lines of different origins and can impact mitochondria and differentiation, consistent with its potential geroprotective function.
Collapse
Affiliation(s)
- Sofia A. Tsvetikova
- SCAMT Laboratory, National Research University ITMO, St. Petersburg 197101, Russia; (A.A.Z.); (O.I.)
| | | | | | - Elena I. Koshel
- SCAMT Laboratory, National Research University ITMO, St. Petersburg 197101, Russia; (A.A.Z.); (O.I.)
| |
Collapse
|
2
|
Zhao W, Guo Y. Increasing the efficiency of gene editing with CRISPR-Cas9 via concurrent expression of the Beta protein. Int J Biol Macromol 2024; 270:132431. [PMID: 38759853 DOI: 10.1016/j.ijbiomac.2024.132431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 04/03/2024] [Accepted: 05/14/2024] [Indexed: 05/19/2024]
Abstract
Escherichia coli has emerged as an important host for the production of biopharmaceuticals or other industrially relevant molecules. An efficient gene editing tool is indispensable for ensuring high production levels and optimal release of target products. However, in Escherichia coli, the CRISPR-Cas9 system has been shown to achieve gene modifications with relatively low frequency. Large-scale PCR screening is required, hindering the identification of positive clones. The beta protein, which weakly binds to single-stranded DNA but tightly associates with complementary strand annealing products, offers a promising solution to this issue. In the present study, we describe a targeted and continuous gene editing strategy for the Escherichia coli genome. This strategy involves the coexpression of the beta protein alongside the CRISPR-Cas9 system, enabling a variety of genome modifications such as gene deletion and insertion with an efficiency exceeding 80 %. The integrity of beta proteins is essential for the CRISPR-Cas9/Beta-based gene editing system. In this work, the deletion of either the N- or C-terminal domain significantly impaired system efficiency. Overall, our findings established the CRISPR-Cas9/Beta system as a suitable gene editing tool for various applications in Escherichia coli.
Collapse
Affiliation(s)
- Weiyu Zhao
- School of Life Sciences, Shanghai University, No. 99 Shangda Road, Shanghai 200444, China; School of Economics and Management, Tongji University, No. 1239 Siping Road, Shanghai 200092, China; Institute of Logistics Science and Engineering, Shanghai Maritime University, 1550 Haigang Avenue, Shanghai 201306, China
| | - Yanan Guo
- School of Life Sciences, Shanghai University, No. 99 Shangda Road, Shanghai 200444, China; Department of Biology, Georgia State University, Atlanta, GA 30303, United States of America.
| |
Collapse
|
3
|
Ma Y, Zang R, Chen M, Zhang P, Cheng Y, Hu G. Study on fermentation preparation, physicochemical properties and biological activity of carboxymethylpachymaran with different degrees of substitution. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:4234-4241. [PMID: 38294266 DOI: 10.1002/jsfa.13305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 11/09/2023] [Accepted: 01/12/2024] [Indexed: 02/01/2024]
Abstract
BACKGROUND Carboxymethylpachymaran (CMP) is created by carboxymethylating pachyman (PM), which increases its water solubility and enhances a number of biological activities. Traditional polysaccharides modified by carboxymethylation employ strong chemical techniques. Carboxymethylcellulose (CMC) has been used previously for liquid fermentation to carboxymethyl modify bacterial polysaccharides. This theory can be applied to fungal polysaccharides because Poria cocos has the ability to naturally utilize cellulose. RESULTS CMC with different degrees of substitution (DS) (0.7, 0.9 and 1.2) were added to P. cocos fermentation medium, and CMPs with different DS (0.38, 0.56 and 0.78, respectively) were prepared by liquid fermentation. The physical and chemical properties and biological activities of the CMPs were determined. Their structures were confirmed by Fourier transform infrared (FTIR) spectroscopy and monosaccharide composition. With the increase of DS, the viscosity and viscosity-average molecular weight of CMPs decreased, whereas polysaccharide content and water solubility increased, although the triple helix structure was not affected. The results of bioactivity assay showed that the higher the DS of CMPs, the higher the 2,2-diphenyl-1-picrylhydrazyl radical scavenging ability, and the stronger the bacterial inhibition ability. CONCLUSION The present study has developed a method for producing CMPs by P. cocos liquid fermentation. The results of the study confirm that enhancing the DS of CMP could effectively enhance its potential biological activity. The findings provide safe and reliable raw materials for creating CMP-related foods and encourage CMP application in the functional food industry. © 2024 Society of Chemical Industry.
Collapse
Affiliation(s)
- Yiming Ma
- Key Laboratory for Green Chemical Process of the Ministry of Education, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, China
| | - Ruixiang Zang
- Key Laboratory for Green Chemical Process of the Ministry of Education, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, China
| | - Mo Chen
- Key Laboratory for Green Chemical Process of the Ministry of Education, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, China
| | - Pei Zhang
- Key Laboratory for Green Chemical Process of the Ministry of Education, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, China
| | - Yaqing Cheng
- Key Laboratory for Green Chemical Process of the Ministry of Education, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, China
| | - Guoyuan Hu
- Key Laboratory for Green Chemical Process of the Ministry of Education, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, China
- Hubei Yugo Gu Ye Co., Ltd, Suizhou, China
| |
Collapse
|
4
|
Liu W, Peng J, Zou S, Xu L, Cheng H, Wang Y, Chen Z, Zhou H. Regulation on Pathway Metabolic Fluxes to Enhance Colanic Acid Production in Escherichia coli. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:13857-13868. [PMID: 37688786 DOI: 10.1021/acs.jafc.3c05046] [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: 09/11/2023]
Abstract
Colanic acid (CA) is a natural polysaccharide macromolecule with rich and unique biological properties and is a promising candidate for use in food and cosmetics. To date, the efficient biosynthesis of CA and the influence of product accumulation on the strains used have yet to be precisely investigated. Herein, bottlenecks in the CA metabolic pathway were untangled by finely regulating the expression of manA, cpsG, fcl, and rcsA. Engineered strains produced CA at >1 g/L in shake flasks without dependence on cold temperatures, and it was verified in a 1 L bioreactor with a titer up to 18.64 g/L within 24 h. The accumulation of CA caused a decrease in the saturated fatty acid content (represented by C16:0 and C18:0) in the cell membrane. This study demonstrated pathway engineering for efficient CA production in cell factories and provided insights into the barriers and solutions faced in the biosynthesis of natural products.
Collapse
Affiliation(s)
- Wenxian Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, P. R. China
| | - Jing Peng
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, P. R. China
| | - Sini Zou
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, P. R. China
| | - Liting Xu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, P. R. China
| | - Haina Cheng
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, P. R. China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, Hunan 410083, P. R. China
| | - Yuguang Wang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, P. R. China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, Hunan 410083, P. R. China
| | - Zhu Chen
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, P. R. China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, Hunan 410083, P. R. China
| | - Hongbo Zhou
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, P. R. China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, Hunan 410083, P. R. China
| |
Collapse
|
5
|
Li C, Li M, Hu M, Zhang T. Metabolic Engineering of De Novo Pathway for the Production of 2'-Fucosyllactose in Escherichia coli. Mol Biotechnol 2023; 65:1485-1497. [PMID: 36652181 DOI: 10.1007/s12033-023-00657-7] [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: 09/08/2022] [Accepted: 01/05/2023] [Indexed: 01/19/2023]
Abstract
2'-Fucosyllactose (2'-FL), one of the most abundant oligosaccharides in human milk, has gained increased attention owing to its nutraceutical and pharmaceutical potential. However, limited availability and high-cost of preparation have limited its widespread application and in-depth investigation of its potential functions. Here, a modular pathway engineering was implemented to construct an Escherichia coli strain to improve the biosynthesis titer of 2'-FL. Before overexpression of manB, manC, gmd, wcaG, and heterologous expression of futC, genes wcaJ and lacZ encoding UDP-glucose lipid carrier transferase and β-galactosidase, respectively, were inactivated from E. coli BL21 (DE3) with the CRISPR-Cas9 system, which inhibited the production of 2'-FL. The results showed that final shake flask culture yielded a 3.8-fold increase in 2'-FL (0.98 g/L) from the engineered strain ELC07. Fed-batch fermentation conditions were optimized in a 3-L bioreactor. The highest titer of 2'-FL (18.22 g/L) was obtained, corresponding to a yield of 0.25 g/g glycerol and a substrate conversion of 0.88 g/g lactose.
Collapse
Affiliation(s)
- Chenchen Li
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, China
| | - Mengli Li
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, China
| | - Miaomiao Hu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, China
| | - Tao Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, China.
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, 214122, Jiangsu, China.
| |
Collapse
|
6
|
Zhan Y, Qiao J, Chen S, Dong X, Wu Y, Wang Z, Wang X. Metabolic Engineering for Overproduction of Colanic Acid in Escherichia coli Mutant with Short Lipopolysaccharide. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:8351-8364. [PMID: 35773212 DOI: 10.1021/acs.jafc.2c03053] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Colanic acid is a major exopolysaccharide existing in most Enterobacteriaceae when exposed to an extreme environment. Colanic acid possesses excellent physical properties and biological activities, which makes it a candidate in the food and healthcare market. Previous strategies for colanic acid overproduction in E. coli mainly focus on removing the negative regulator on colanic acid biosynthesis or overexpressing the rcsA gene to up-regulate the cps operon. In this study, modifications in metabolic pathways were implemented in E. coli mutant strains with shortened lipopolysaccharides to improve colanic acid production. First, ackA was deleted to remove the byproduct acetate and the effect of accumulated acetyl-phosphate on colanic acid production was investigated. Second, 11 genes responsible for O-antigen synthesis were deleted to reduce its competition for glucose-1-phosphate and UDP-galactose with colanic acid production. Third, uppS was overexpressed to supply lipid carriers for synthesizing a colanic acid repeat unit. Colanic acid production in the final engineered strain WZM008/pTrcS reached 11.68 g/L in a 2.0 L bioreactor, 3.54 times the colanic acid production by the WQM001 strain. The results provide insights for further engineering E. coli to maximize CA production.
Collapse
Affiliation(s)
- Yi Zhan
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Jun Qiao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Shanshan Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Xiaofei Dong
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Yuanming Wu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Zhen Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Xiaoyuan Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| |
Collapse
|
7
|
Chen A, Xie Y, Xie S, Liu Y, Liu M, Shi J, Sun J. Production of citramalate in Escherichia coli by mediating colonic acid metabolism and fermentation optimization. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.06.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
8
|
Li S, Xu X, Lv X, Liu Y, Li J, Du G, Liu L. Combinatorial Metabolic Engineering and Enzymatic Catalysis Enable Efficient Production of Colanic Acid. Microorganisms 2022; 10:877. [PMID: 35630322 PMCID: PMC9143390 DOI: 10.3390/microorganisms10050877] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/01/2022] [Accepted: 04/04/2022] [Indexed: 02/04/2023] Open
Abstract
Colanic acid can promote the lifespan of humans by regulating mitochondrial homeostasis, and it has widespread applications in the field of health. However, colanic acid is produced at a low temperature (20 °C) with low titer. Using Escherichia coli K-12 MG1655, we constructed the SRP-4 strain with high colanic acid production at 30 °C by enhancing the precursor supply and relieving the regulation of transcription for colanic acid synthesis genes by the RCS system. After media optimization, the colanic acid titer increased by 579.9-fold and reached 12.2 g/L. Subsequently, we successfully purified the colanic acid hydrolase and reduced the molecular weight of colanic acid (106.854 kDa), thereby eliminating the inhibition of high-molecular-weight colanic acid on strain growth. Finally, after adding the colanic acid hydrolase (4000 U/L), the colanic acid with low molecular weight reached 24.99 g/L in 3-L bioreactor, the highest titer reported so far. This high-producing strain of colanic acid will promote the application of low-molecular-weight colanic acid in the field of health.
Collapse
Affiliation(s)
- Suwei Li
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; (S.L.); (X.X.); (X.L.); (Y.L.); (J.L.); (G.D.)
- Science Center for Future Foods, Jiangnan University, Wuxi 214122, China
| | - Xianhao Xu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; (S.L.); (X.X.); (X.L.); (Y.L.); (J.L.); (G.D.)
- Science Center for Future Foods, Jiangnan University, Wuxi 214122, China
| | - Xueqin Lv
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; (S.L.); (X.X.); (X.L.); (Y.L.); (J.L.); (G.D.)
- Science Center for Future Foods, Jiangnan University, Wuxi 214122, China
| | - Yanfeng Liu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; (S.L.); (X.X.); (X.L.); (Y.L.); (J.L.); (G.D.)
- Science Center for Future Foods, Jiangnan University, Wuxi 214122, China
| | - Jianghua Li
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; (S.L.); (X.X.); (X.L.); (Y.L.); (J.L.); (G.D.)
- Science Center for Future Foods, Jiangnan University, Wuxi 214122, China
| | - Guocheng Du
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; (S.L.); (X.X.); (X.L.); (Y.L.); (J.L.); (G.D.)
- Science Center for Future Foods, Jiangnan University, Wuxi 214122, China
| | - Long Liu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; (S.L.); (X.X.); (X.L.); (Y.L.); (J.L.); (G.D.)
- Science Center for Future Foods, Jiangnan University, Wuxi 214122, China
| |
Collapse
|
9
|
Yan ZF, Yuan S, Qin Q, Wu J. Enhancement of rice protein hydrolysate quality using a novel dual enzyme system. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
10
|
Corsini PM, Wang S, Rehman S, Fenn K, Sagar A, Sirovica S, Cleaver L, Edwards-Gayle CJC, Mastroianni G, Dorgan B, Sewell LM, Lynham S, Iuga D, Franks WT, Jarvis J, Carpenter GH, Curtis MA, Bernadó P, Darbari VC, Garnett JA. Molecular and cellular insight into Escherichia coli SslE and its role during biofilm maturation. NPJ Biofilms Microbiomes 2022; 8:9. [PMID: 35217675 PMCID: PMC8881592 DOI: 10.1038/s41522-022-00272-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 01/31/2022] [Indexed: 11/10/2022] Open
Abstract
Escherichia coli is a Gram-negative bacterium that colonises the human intestine and virulent strains can cause severe diarrhoeal and extraintestinal diseases. The protein SslE is secreted by a range of pathogenic and commensal E. coli strains. It can degrade mucins in the intestine, promotes biofilm maturation and it is a major determinant of infection in virulent strains, although how it carries out these functions is not well understood. Here, we examine SslE from the commensal E. coli Waksman and BL21 (DE3) strains and the enterotoxigenic H10407 and enteropathogenic E2348/69 strains. We reveal that SslE has a unique and dynamic structure in solution and in response to acidification within mature biofilms it can form a unique aggregate with amyloid-like properties. Furthermore, we show that both SslE monomers and aggregates bind DNA in vitro and co-localise with extracellular DNA (eDNA) in mature biofilms, and SslE aggregates may also associate with cellulose under certain conditions. Our results suggest that interactions between SslE and eDNA are important for biofilm maturation in many E. coli strains and SslE may also be a factor that drives biofilm formation in other SslE-secreting bacteria.
Collapse
Affiliation(s)
- Paula M Corsini
- Centre for Host-Microbiome Interactions, Faculty of Dental, Oral & Craniofacial Sciences, King's College London, London, UK
- School of Biological and Behavioural Sciences, Queen Mary University of London, London, UK
| | - Sunjun Wang
- Centre for Host-Microbiome Interactions, Faculty of Dental, Oral & Craniofacial Sciences, King's College London, London, UK
| | - Saima Rehman
- Centre for Host-Microbiome Interactions, Faculty of Dental, Oral & Craniofacial Sciences, King's College London, London, UK
| | - Katherine Fenn
- School of Biological and Behavioural Sciences, Queen Mary University of London, London, UK
| | - Amin Sagar
- Centre de Biologie Structurale, Université de Montpellier, INSERM, CNRS, Montpellier, France
| | - Slobodan Sirovica
- Centre for Oral Bioengineering, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Leanne Cleaver
- Centre for Host-Microbiome Interactions, Faculty of Dental, Oral & Craniofacial Sciences, King's College London, London, UK
| | | | - Giulia Mastroianni
- School of Biological and Behavioural Sciences, Queen Mary University of London, London, UK
| | - Ben Dorgan
- Centre for Host-Microbiome Interactions, Faculty of Dental, Oral & Craniofacial Sciences, King's College London, London, UK
| | - Lee M Sewell
- Centre for Host-Microbiome Interactions, Faculty of Dental, Oral & Craniofacial Sciences, King's College London, London, UK
| | - Steven Lynham
- Proteomics Facility, Centre of Excellence for Mass Spectrometry, King's College London, London, UK
| | - Dinu Iuga
- Department of Physics, University of Warwick, Coventry, UK
| | - W Trent Franks
- Department of Physics, University of Warwick, Coventry, UK
| | - James Jarvis
- Randall Division of Cell and Molecular Biophysics and Centre for Biomolecular Spectroscopy, King's College London, London, UK
| | - Guy H Carpenter
- Centre for Host-Microbiome Interactions, Faculty of Dental, Oral & Craniofacial Sciences, King's College London, London, UK
| | - Michael A Curtis
- Centre for Host-Microbiome Interactions, Faculty of Dental, Oral & Craniofacial Sciences, King's College London, London, UK
| | - Pau Bernadó
- Centre de Biologie Structurale, Université de Montpellier, INSERM, CNRS, Montpellier, France
| | - Vidya C Darbari
- School of Biological and Behavioural Sciences, Queen Mary University of London, London, UK.
| | - James A Garnett
- Centre for Host-Microbiome Interactions, Faculty of Dental, Oral & Craniofacial Sciences, King's College London, London, UK.
- School of Biological and Behavioural Sciences, Queen Mary University of London, London, UK.
| |
Collapse
|
11
|
Jacob C, Velásquez AC, Josh NA, Settles M, He SY, Melotto M. Dual transcriptomic analysis reveals metabolic changes associated with differential persistence of human pathogenic bacteria in leaves of Arabidopsis and lettuce. G3 (BETHESDA, MD.) 2021; 11:jkab331. [PMID: 34550367 PMCID: PMC8664426 DOI: 10.1093/g3journal/jkab331] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 09/09/2021] [Indexed: 11/14/2022]
Abstract
Understanding the molecular determinants underlying the interaction between the leaf and human pathogenic bacteria is key to provide the foundation to develop science-based strategies to prevent or decrease the pathogen contamination of leafy greens. In this study, we conducted a dual RNA-sequencing analysis to simultaneously define changes in the transcriptomic profiles of the plant and the bacterium when they come in contact. We used an economically relevant vegetable crop, lettuce (Lactuca sativa L. cultivar Salinas), and a model plant, Arabidopsis thaliana Col-0, as well as two pathogenic bacterial strains that cause disease outbreaks associated with fresh produce, Escherichia coli O157:H7 and Salmonella enterica serovar Typhimurium 14028s (STm 14028s). We observed commonalities and specificities in the modulation of biological processes between Arabidopsis and lettuce and between O157:H7 and STm 14028s during early stages of the interaction. We detected a larger alteration of gene expression at the whole transcriptome level in lettuce and Arabidopsis at 24 h post inoculation with STm 14028s compared to that with O157:H7. In addition, bacterial transcriptomic adjustments were substantially larger in Arabidopsis than in lettuce. Bacterial transcriptome was affected at a larger extent in the first 4 h compared to the subsequent 20 h after inoculation. Overall, we gained valuable knowledge about the responses and counter-responses of both bacterial pathogen and plant host when these bacteria are residing in the leaf intercellular space. These findings and the public genomic resources generated in this study are valuable for additional data mining.
Collapse
Affiliation(s)
- Cristián Jacob
- Department of Plant Sciences, University of California, Davis, Davis, CA 95616, USA
- Department of Plant Sciences, Horticulture and Agronomy Graduate Group, University of California, Davis, Davis, CA 95616, USA
- Departamento de Ciencias Vegetales, Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
| | - André C Velásquez
- Department of Biology, Howard Hughes Medical Institute, Duke University, Durham, NC 27708, USA
| | - Nikhil A Josh
- Bioinformatics Core Facility in the Genome Center, University of California, Davis, Davis, CA 95616, USA
| | - Matthew Settles
- Bioinformatics Core Facility in the Genome Center, University of California, Davis, Davis, CA 95616, USA
| | - Sheng Yang He
- Department of Biology, Howard Hughes Medical Institute, Duke University, Durham, NC 27708, USA
- Department of Biology, Duke University, Durham, NC 27708, USA
| | - Maeli Melotto
- Department of Plant Sciences, University of California, Davis, Davis, CA 95616, USA
| |
Collapse
|
12
|
Qiao J, Zhan Y, Tan X, Liu Y, Hu X, Wang X. Colanic Acid: Biosynthetic Overproduction by Engineering Escherichia coli and Physical Property Characterization. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:13881-13894. [PMID: 34763421 DOI: 10.1021/acs.jafc.1c04823] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Colanic acid has promising applications in food, cosmetic, and healthcare fields. In this study, a recombinant WQM003/pRAU was constructed by deleting genes lon and hns and overexpressing genes rcsA and galU in E. coli MG1655Δ(L-Q). After systematic optimization of fermentation conditions, colanic acid yield in WQM003/pRAU reached 19.79 g/L, the highest yield reported so far. The colanic acid produced by WQM003/pRAU was purified and its structure and physical properties were determined. This colanic acid shows a triple-helical structure and is stable up to 102 °C, and its melting temperature is 253.9 °C. This colanic acid shows a sphere-like chain conformation in aqueous solution. The viscosity of this colanic acid solution is related to concentration, shear rate, salt, temperature, and pH. At high concentrations, this colanic acid shows both viscous and elastic behaviors. These results suggest that the colanic acid produced by WQM003/pRAU has broad application prospects.
Collapse
Affiliation(s)
- Jun Qiao
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Yi Zhan
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Xin Tan
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Yuantao Liu
- Hulunbeier Northeast Fufeng Biotechnology Co., Ltd., Hulunbeier 162650, China
| | - Xiaoqing Hu
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China
| | - Xiaoyuan Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| |
Collapse
|
13
|
Engineering the Outer Membrane Could Facilitate Better Bacterial Performance and Effectively Enhance Poly-3-Hydroxybutyrate Accumulation. Appl Environ Microbiol 2021; 87:e0138921. [PMID: 34550763 DOI: 10.1128/aem.01389-21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Poly-3-hydroxybutyrate (PHB) is an environmentally friendly polymer and can be produced in Escherichia coli cells after overexpression of the heterologous gene cluster phaCAB. The biosynthesis of the outer membrane (OM) consumes many nutrients and influences cell morphology. Here, we engineered the OM by disrupting all gene clusters relevant to the polysaccharide portion of lipopolysaccharide (LPS), colanic acid (CA), flagella, and/or fimbria in E. coli W3110. All these disruptions benefited PHB production. Especially, disrupting all these OM components increased the PHB content to 83.0 wt% (PHB content percentage of dry cell weight), while the wild-type control produced only 1.5 wt% PHB. The increase was mainly due to the LPS truncation to Kdo2 (3-deoxy-d-manno-octulosonic acid)-lipid A, which resulted in 82.0 wt% PHB with a 25-fold larger cell volume, and disrupting CA resulted in 57.8 wt% PHB. In addition, disrupting LPS facilitated advantageous fermentation features, including 69.1% less acetate, a 550% higher percentage of autoaggregated cells among the total culture cells, 69.1% less biofilm, and a higher broken cell ratio. Further detailed mechanism investigations showed that disrupting LPS caused global changes in envelope and cellular metabolism: (i) a sharp decrease in flagella, fimbria, and secretions; (ii) more elastic cells; (iii) much greater carbon flux toward acetyl coenzyme A (acetyl-CoA) and supply of cofactors, including NADP, NAD, and ATP; and (iv) a decrease in by-product acids but increase in γ-aminobutyric acid by activating σE factor. Disrupting CA, flagella, and fimbria also improved the levels of acetyl-CoA and cofactors. The results indicate that engineering the OM is an effective strategy to enhance PHB production and highlight the applicability of OM engineering to increase microbial cell factory performance. IMPORTANCE Understanding the detailed influence of the OM on the cell envelope and cellular metabolism is important for optimizing the E. coli cell factory and many other microorganisms. This study revealed the applicability of remodeling the OM to enhance PHB accumulation as representative inclusion bodies. The results generated in this study give essential information for producing other inclusion bodies or chemicals which need more acetyl-CoA and cofactors but less by-product acids. This study is promising to provide new ideas for the improvement of microbial cell factories.
Collapse
|
14
|
Qin Q, Tang C, Wu J, Chen S, Yan Z. A dual-functional aminopeptidase from Streptomyces canus T20 and its application in the preparation of small rice peptides. Int J Biol Macromol 2020; 167:214-222. [PMID: 33259841 DOI: 10.1016/j.ijbiomac.2020.11.175] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 10/30/2020] [Accepted: 11/25/2020] [Indexed: 02/03/2023]
Abstract
An aminopeptidase that derived from Streptomyces canus T20 (ScAP) was successfully expressed and characterized in Escherichia coli BL21 (DE3) for first time. The specific activity was 6000 U/mg, which is highest in Streptomyces aminopeptidases. Its optimal conditions were 60 °C and pH 8.0, respectively. ScAP exhibited excellent thermal and alkaline pH stability, retained 80.0% maximal activity at 50 °C for 200 h or at pH 9.0 for 24 h. Its activity observed to be complete inhibited by 0.1 mM EDTA and enhanced by Ca2+ and Co2+ to 115.4% and 104.0% respectively. ScAP also has exhibited high specificity towards rice protein on preparation of small peptides. The yield of small rice peptides achieved 66.5%, which is highest by far. Besides, ScAP have significant debittering effect on rice peptides. Results showed that bitter intensity score decreased by 49.0% with optimum condition (0.048% ScAP at 50 °C for 6 h). Therefore, ScAP as dual functional aminopeptidase of hydrolytic and debittering might have a potential application in the production of high yield and low bitterness of small rice peptides.
Collapse
Affiliation(s)
- Qin Qin
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
| | - Chengye Tang
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
| | - Jing Wu
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
| | - Sheng Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China.
| | - Zhengfei Yan
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China.
| |
Collapse
|
15
|
Han HM, Kim IJ, Yun EJ, Lee JW, Cho Y, Jin YS, Kim KH. Overproduction of Exopolysaccharide Colanic Acid by Escherichia coli by Strain Engineering and Media Optimization. Appl Biochem Biotechnol 2020; 193:111-127. [PMID: 32820352 DOI: 10.1007/s12010-020-03409-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 08/12/2020] [Indexed: 02/04/2023]
Abstract
Colanic acid (CA) is one of the major bacterial exopolysaccharides. Due to its biological activities, CA has a significant commercial value. However, the cultivation conditions have not been optimized for the large-scale production of CA. Here, we constructed a CA-overproducing Escherichia coli strain (ΔwaaF) and statistically optimized its culture media for maximum CA production. Glucose and tryptone were found the optimal carbon and nitrogen sources, respectively. Fractional factorial design indicated tryptone and Na2HPO4 as the critical nutrients for CA production. Through further optimization, we achieved a maximum CA production of 1910.0 mg/L, which is approximately 12-fold higher than the amount obtained using the non-optimized medium initially used. The predicted value of CA production was comparable with experimental value (2052.8 mg/L) under the optimized conditions. This study constitutes a successful demonstration of media optimization for increased CA production, and paves the way for future research for achieving large-scale CA production.
Collapse
Affiliation(s)
- Hyeong Min Han
- Department of Biotechnology, Korea University Graduate School, Seoul, 02841, South Korea
| | - In Jung Kim
- Department of Biotechnology, Korea University Graduate School, Seoul, 02841, South Korea
| | - Eun Ju Yun
- Department of Biotechnology, Korea University Graduate School, Seoul, 02841, South Korea
| | - Jae Won Lee
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Yoonho Cho
- Department of Biotechnology, Korea University Graduate School, Seoul, 02841, South Korea
| | - Yong-Su Jin
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
| | - Kyoung Heon Kim
- Department of Biotechnology, Korea University Graduate School, Seoul, 02841, South Korea.
| |
Collapse
|
16
|
Chen Q, Wu H, Ji M, Xie Y, Li S, Li Y, Shi J, Sun J. Engineering a colanic acid biosynthesis pathway in E. coli for manufacturing 2’-fucosyllactose. Process Biochem 2020. [DOI: 10.1016/j.procbio.2020.04.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
17
|
Wu H, Li S, Ji M, Chen Q, Shi J, Blamey JM, Sun J. Improvement of polyhydroxybutyrate production by deletion of csrA in Escherichia coli. ELECTRON J BIOTECHN 2020. [DOI: 10.1016/j.ejbt.2020.04.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
18
|
Colanic acid biosynthesis in Escherichia coli is dependent on lipopolysaccharide structure and glucose availability. Microbiol Res 2020; 239:126527. [PMID: 32590169 DOI: 10.1016/j.micres.2020.126527] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 06/06/2020] [Accepted: 06/06/2020] [Indexed: 01/31/2023]
Abstract
Lipopolysaccharide and colanic acid are important forms of exopolysaccharides located on the cell surface of Escherichia coli, but their interrelation with the cell stress response is not well understood. In this study, nine mutant strains with different structures of lipopolysaccharide were constructed from E. coli MG1655 by deletion of a single gene or multiple genes. All mutant strains did not produce colanic acid when grown in LB medium, but six of them could produce colanic acid when grown either in M9 medium in which glucose is the sole carbon source or in LB medium supplemented with glucose. The results indicate that colanic acid production in E. coli is dependent on both lipopolysaccharide structure and glucose availability. However, transcriptional analysis showed that 20 genes related to the colanic acid biosynthesis and the key gene rcsA in the Rcs system were all transcriptionally up-regulated in all of the nine mutant strains no matter they were grown in M9 or LB medium. This suggests that the availability of some nucleotide-sugar precursors shared by the biosynthesis of lipopolysaccharide and colanic acid might play a major role in colanic acid production in E. coli. Lipopolysaccharide pathway might have a huge priority to colanic acid pathway to use the common precursors; therefore, the colanic acid is not produced in MG1655 and the nine mutants when grown in LB medium. In the six mutant strains that can produce colanic acid in the glucose rich media, the common precursors might be abundant because they were not needed for synthesizing the mutant lipopolysaccharide.
Collapse
|
19
|
Wan L, Zhu Y, Li W, Zhang W, Mu W. Combinatorial Modular Pathway Engineering for Guanosine 5'-Diphosphate-l-fucose Production in Recombinant Escherichia coli. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:5668-5675. [PMID: 32336091 DOI: 10.1021/acs.jafc.0c01064] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Guanosine 5'-diphosphate (GDP)-l-fucose is an important nucleotide sugar involved in the synthesis of fucosylated oligosaccharides, such as fucosylated human milk oligosaccharides, which play important roles in physiological and pathological processes. Here, a combinatorial modular pathway engineering strategy was implemented to efficiently increase the intracellular titers of GDP-l-fucose in engineered Escherichia coli. The de novo GDP-l-fucose synthesis pathway was partitioned into two modules and fine-tuned at both transcriptional and translational levels, which remarkably improved the GDP-l-fucose production. In addition, the gene encoding the UDP-glucose lipid carrier transferase (WcaJ) was inactivated to eliminate the competing metabolite pathway from GDP-l-fucose to colanic acid. Furthermore, cofactors were regenerated to promote biocatalysis. Taken together, the final engineered strain EWL37, which could achieve a titer of 18.33 mg/L in shake-flask cultivation, showed 106.21 mg/L intracellular GDP-l-fucose accumulation and a DCW-specific GDP-l-fucose content of 4.28 mg/g through fed-batch cultivation. In general, this study demonstrated that the utilization of combinatorial modular pathway engineering significantly improved the de novo synthesis of GDP-l-fucose in engineered E. coli.
Collapse
Affiliation(s)
- Li Wan
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Yingying Zhu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wen Li
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wenli Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China
| |
Collapse
|