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Li H, Chen S, Wang M, Shi S, Zhao W, Xiong G, Zhou J, Qu J. Phosphate solubilization and plant growth properties are promoted by a lactic acid bacterium in calcareous soil. Appl Microbiol Biotechnol 2024; 108:24. [PMID: 38159115 DOI: 10.1007/s00253-023-12850-4] [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: 05/04/2023] [Revised: 09/19/2023] [Accepted: 10/03/2023] [Indexed: 01/03/2024]
Abstract
On the basis of good phosphate solubilization ability of a lactic acid bacteria (LAB) strain Limosilactobacillus sp. LF-17, bacterial agent was prepared and applied to calcareous soil to solubilize phosphate and promote the growth of maize seedlings in this study. A pot experiment showed that the plant growth indicators, phosphorus content, and related enzyme activity of the maize rhizospheric soils in the LF treatment (treated with LAB) were the highest compared with those of the JP treatment (treated with phosphate solubilizing bacteria, PSB) and the blank control (CK). The types of organic acids in maize rhizospheric soil were determined through LC-MS, and 12 acids were detected in all the treatments. The abundant microbes belonged to the genera of Lysobacter, Massilia, Methylbacillus, Brevundimonas, and Limosilactobacillus, and they were beneficial to dissolving phosphate or secreting growth-promoting phytohormones, which were obviously higher in the LF and JP treatments than in CK as analyzed by high-throughput metagenomic sequencing methods. In addition, the abundance values of several enzymes, Kyoto Encyclopedia of Genes and Genomes (KEGG) orthology, and Carbohydrate-Active Enzymes (CAZys), which were related to substrate assimilation and metabolism, were the highest in the LF treatment. Therefore, aside from phosphate-solubilizing microorganisms, LAB can be used as environmentally friendly crop growth promoters in agriculture and provide another viable option for microbial fertilizers. KEY POINTS: • The inoculation of LAB strain effectively promoted the growth and chlorophyll synthesis of maize seedlings. • The inoculation of LAB strain significantly increased the TP content of maize seedlings and the AP concentration of the rhizosphere soil. • The inoculation of LAB strain increased the abundances of the dominant beneficial functional microbes in the rhizosphere soil.
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Affiliation(s)
- Haifeng Li
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China.
| | - Siyuan Chen
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Mengyu Wang
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Shuoshuo Shi
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Wenjian Zhao
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Guoyang Xiong
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Jia Zhou
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Jianhang Qu
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
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Zhang C, Guo M, Kong Y, Zhang J, Wang J, Sun S, Li X, Zeng X, Gong H, Fan X. Antifungal mechanism of phenyllactic acid against Mucor investigated through proteomic analysis. Food Chem 2024; 452:139525. [PMID: 38718453 DOI: 10.1016/j.foodchem.2024.139525] [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: 01/07/2024] [Revised: 04/24/2024] [Accepted: 04/28/2024] [Indexed: 06/01/2024]
Abstract
The primary inhibitory targets of phenyllactic acid (PLA, including D-PLA and L-PLA) on Mucor were investigated using Mucor racemosus LD3.0026 isolated from naturally spoiled cherry, as an indicator fungi. The results demonstrated that the minimum inhibitory concentration (MIC) of PLA against Mucor was 12.5 mmol·L-1. Results showed that the growing cells at the tip of the Mucor were not visibly deformed, and there was no damage to the cell wall following PLA treatment; however, PLA damaged the cell membrane and internal structure. The results of isobaric tags for relative and absolute quantification (iTRAQ) indicated that the Mucor mitochondrial respiratory chain may be the target of PLA, potentially inhibiting the energy supply of Mucor. These results indicate that the antifungal mechanism of PLA against mold is independent of its molecular configuration. The growth of Mucor is suppressed by PLA, which destroys the organelle structure in the mycelium and inhibits energy metabolism.
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Affiliation(s)
- Chaoqi Zhang
- College of Food Engineering, Yantai Key Laboratory of Nanoscience and Technology for Prepared Food, Yantai Engineering Research Center of Food Green Processing and Quality Control, Ludong University, Yantai, Shandong 264025, PR China
| | - Mingmei Guo
- Mudan District Mudan Street Sub-district Office, Heze, Shandong 274000, PR China
| | - Yanhui Kong
- Yantai Landscape Construction and Maintenance Center, Yantai, Shandong 264000, PR China
| | - Juanyue Zhang
- College of Food Engineering, Yantai Key Laboratory of Nanoscience and Technology for Prepared Food, Yantai Engineering Research Center of Food Green Processing and Quality Control, Ludong University, Yantai, Shandong 264025, PR China
| | - Jingyue Wang
- College of Food Engineering, Yantai Key Laboratory of Nanoscience and Technology for Prepared Food, Yantai Engineering Research Center of Food Green Processing and Quality Control, Ludong University, Yantai, Shandong 264025, PR China
| | - Shuyang Sun
- College of Food Engineering, Yantai Key Laboratory of Nanoscience and Technology for Prepared Food, Yantai Engineering Research Center of Food Green Processing and Quality Control, Ludong University, Yantai, Shandong 264025, PR China
| | - Xiulian Li
- College of Pharmacy, Binzhou Medical University, Yantai, Shandong 264003, PR China
| | - Xiangquan Zeng
- Department of Food Science, College of Agriculture, Purdue University, West Lafayette 47906, IN, USA
| | - Hansheng Gong
- College of Food Engineering, Yantai Key Laboratory of Nanoscience and Technology for Prepared Food, Yantai Engineering Research Center of Food Green Processing and Quality Control, Ludong University, Yantai, Shandong 264025, PR China.
| | - Xinguang Fan
- College of Food Engineering, Yantai Key Laboratory of Nanoscience and Technology for Prepared Food, Yantai Engineering Research Center of Food Green Processing and Quality Control, Ludong University, Yantai, Shandong 264025, PR China.
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Zhao C, Penttinen P, Zhang L, Dong L, Zhang F, Zhang S, Li Z, Zhang X. A combination of omics-based analyses to elucidate the effect of NaCl concentrations on the metabolites and microbial dynamics during the ripening fermentation of Pixian-Douban. Food Chem 2024; 448:139052. [PMID: 38531296 DOI: 10.1016/j.foodchem.2024.139052] [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: 10/25/2023] [Revised: 03/01/2024] [Accepted: 03/14/2024] [Indexed: 03/28/2024]
Abstract
The study investigated the effect of different sodium chloride (NaCl) concentrations (10%, 15%, and 20%) on the ripening fermentation of Pixian-Douban, a traditional fermented condiment. The results showed that NaCl affected the dynamics of physicochemical parameters, volatile components, fatty acids, amino metabolites, organic acids, and microbial composition, and their dynamic modes were different. After 253 days fermentation, the 10% NaCl Pixian-Douban had significantly (p < 0.05) higher levels of total organic acids (20,308.25 mg/kg), amino metabolites (28,144.96 mg/kg), and volatiles (3.36 mg/kg) compared to 15% and 20% NaCl Pixian-Douban. Notably, the possible health risk associated with high concentration of biogenic amines in 10% NaCl Pixian-Douban is of concern. Moreover, correlation analyses indicated that the effect of NaCl on the quality of Pixian-Douban may be mainly related to bacteria. This study deepens the knowledge about the role of NaCl in ripening fermentation of Pixian-Douban and contributes to develop low-NaCl Pixian-Douban product.
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Affiliation(s)
- Chi Zhao
- College of Resources, Sichuan Agricultural University, 211 Huimin Rd, Chengdu 611130, China; Institute of Agro-products Processing Science and Technology, Sichuan Academy of Agricultural Sciences, 60 Shizishan Rd, Chengdu 610066, China
| | - Petri Penttinen
- College of Resources, Sichuan Agricultural University, 211 Huimin Rd, Chengdu 611130, China; Faculty of Agriculture and Forestry, University of Helsinki, Viikinkaari 1, 00014, Finland
| | - Lingzi Zhang
- College of Resources, Sichuan Agricultural University, 211 Huimin Rd, Chengdu 611130, China
| | - Ling Dong
- Institute of Agro-products Processing Science and Technology, Sichuan Academy of Agricultural Sciences, 60 Shizishan Rd, Chengdu 610066, China
| | - Fengju Zhang
- Institute of Agro-products Processing Science and Technology, Sichuan Academy of Agricultural Sciences, 60 Shizishan Rd, Chengdu 610066, China
| | - Suyi Zhang
- National Engineering Research Center of Solid-state Brewing, Luzhou 646000, China
| | - Zhihua Li
- Institute of Agro-products Processing Science and Technology, Sichuan Academy of Agricultural Sciences, 60 Shizishan Rd, Chengdu 610066, China.
| | - Xiaoping Zhang
- College of Resources, Sichuan Agricultural University, 211 Huimin Rd, Chengdu 611130, China.
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Basu Choudhury G, Datta S. Implication of Molecular Constraints Facilitating the Functional Evolution of Pseudomonas aeruginosa KPR2 into a Versatile α-Keto-Acid Reductase. Biochemistry 2024. [PMID: 38962820 DOI: 10.1021/acs.biochem.4c00087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/05/2024]
Abstract
Theoretical concepts linking the structure, function, and evolution of a protein, while often intuitive, necessitate validation through investigations in real-world systems. Our study empirically explores the evolutionary implications of multiple gene copies in an organism by shedding light on the structure-function modulations observed in Pseudomonas aeruginosa's second copy of ketopantoate reductase (PaKPR2). We demonstrated with two apo structures that the typical active site cleft of the protein transforms into a two-sided pocket where a molecular gate made up of two residues controls the substrate entry site, resulting in its inactivity toward the natural substrate ketopantoate. Strikingly, this structural modification made the protein active against several important α-keto-acid substrates with varied efficiency. Structural constraints at the binding site for this altered functional trait were analyzed with two binary complexes that show the conserved residue microenvironment faces restricted movements due to domain closure. Finally, its mechanistic highlights gathered from a ternary complex structure help in delineating the molecular perspectives behind its kinetic cooperativity toward these broad range of substrates. Detailed structural characteristics of the protein presented here also identified four key amino acid residues responsible for its versatile α-keto-acid reductase activity, which can be further modified to improve its functional properties through protein engineering.
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Affiliation(s)
- Gourab Basu Choudhury
- CSIR-Indian Institute of Chemical Biology, Raja S C Mullick Road, Jadavpur, Kolkata 700032, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Saumen Datta
- CSIR-Indian Institute of Chemical Biology, Raja S C Mullick Road, Jadavpur, Kolkata 700032, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Grundmann CO, Guzman J, Vilcinskas A, Pupo MT. The insect microbiome is a vast source of bioactive small molecules. Nat Prod Rep 2024; 41:935-967. [PMID: 38411238 DOI: 10.1039/d3np00054k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Covering: September 1964 to June 2023Bacteria and fungi living in symbiosis with insects have been studied over the last sixty years and found to be important sources of bioactive natural products. Not only classic producers of secondary metabolites such as Streptomyces and other members of the phylum Actinobacteria but also numerous bacteria from the phyla Proteobacteria and Firmicutes and an impressive array of fungi (usually pathogenic) serve as the source of a structurally diverse number of small molecules with important biological activities including antimicrobial, cytotoxic, antiparasitic and specific enzyme inhibitors. The insect niche is often the exclusive provider of microbes producing unique types of biologically active compounds such as gerumycins, pederin, dinactin, and formicamycins. However, numerous insects still have not been described taxonomically, and in most cases, the study of their microbiota is completely unexplored. In this review, we present a comprehensive survey of 553 natural products produced by microorganisms isolated from insects by collating and classifying all the data according to the type of compound (rather than the insect or microbial source). The analysis of the correlations among the metadata related to insects, microbial partners, and their produced compounds provides valuable insights into the intricate dynamics between insects and their symbionts as well as the impact of their metabolites on these relationships. Herein, we focus on the chemical structure, biosynthesis, and biological activities of the most relevant compounds.
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Affiliation(s)
| | - Juan Guzman
- Department of Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology, Giessen, Germany
| | - Andreas Vilcinskas
- Department of Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology, Giessen, Germany
- Institute for Insect Biotechnology, Justus-Liebig-University, Giessen, Germany
| | - Mônica Tallarico Pupo
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
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Crossley P, Sutar Y, Tsoy I, Mukkirwar S, Łaniewski P, Herbst-Kralovetz MM, Date AA. Development of phenyllactic acid ionic liquids and evaluation of cytotoxicity to human cervical epithelial cells. RSC Adv 2024; 14:16083-16092. [PMID: 38765482 PMCID: PMC11100303 DOI: 10.1039/d4ra01812e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2024] [Accepted: 04/24/2024] [Indexed: 05/22/2024] Open
Abstract
Phenyllactic acid (PLA), is a naturally produced, broad-spectrum antimicrobial compound with activity against bacteria and fungi. PLA can be produced by a variety of lactic acid bacteria, including vaginal Lactobacillus species, which are healthy constituents of the vaginal microbiome with a protective role against invading pathogenic bacteria and/or fungi. Additionally, PLA has been shown to exhibit anti-inflammatory and immunomodulatory properties, overall indicating its therapeutic potential as an intravaginally delivered compound for modulation of the vaginal microbiome. However, PLA has low kinetic solubility in water. Hence, strategies to improve the solubility of PLA are necessary to facilitate its intravaginal delivery. Using biocompatible cations, choline and carnitine, we successfully transformed both d- and l-enantiomers of crystalline PLA into amorphous low-melting ionic liquids (ILs) with high water solubility. We further evaluated the in vitro cytotoxicity of PLA ILs to human cervical epithelial cells. Microscopic visualisation of cellular morphology using crystal violet staining and MTT cell proliferation assay revealed that PLA ILs result in minimal morphological changes and low cytotoxicity to human cervical epithelial cells. Overall, we successfully demonstrated that transforming PLA into ILs efficiently enhances its solubility in water and these formulations are not toxic to human epithelial cells. This investigation lays the groundwork for future testing of PLA ILs for their antimicrobial properties and metabolic activity within the cervicovaginal microenvironment.
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Affiliation(s)
- Phoebe Crossley
- Department of Life Sciences, University of Bath Bath UK
- Department of Obstetrics and Gynecology, College of Medicine - Phoenix, University of Arizona Phoenix AZ USA
| | - Yogesh Sutar
- Department of Pharmacology and Toxicology, R. Ken Coit College of Pharmacy, University of Arizona Tucson AZ USA
| | - Irina Tsoy
- Department of Pharmacology and Toxicology, R. Ken Coit College of Pharmacy, University of Arizona Tucson AZ USA
| | - Srushti Mukkirwar
- Department of Pharmacology and Toxicology, R. Ken Coit College of Pharmacy, University of Arizona Tucson AZ USA
| | - Paweł Łaniewski
- Department of Basic Medical Sciences, College of Medicine - Phoenix, University of Arizona Phoenix AZ USA
| | - Melissa M Herbst-Kralovetz
- Department of Basic Medical Sciences, College of Medicine - Phoenix, University of Arizona Phoenix AZ USA
- Department of Obstetrics and Gynecology, College of Medicine - Phoenix, University of Arizona Phoenix AZ USA
- University of Arizona Cancer Center, University of Arizona Tucson AZ USA
| | - Abhijit A Date
- Department of Pharmacology and Toxicology, R. Ken Coit College of Pharmacy, University of Arizona Tucson AZ USA
- University of Arizona Cancer Center, University of Arizona Tucson AZ USA
- Department of Ophthalmology and Visual Sciences, University of Arizona College of Medicine Tucson AZ USA
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Ponzio A, Rebecchi A, Zivoli R, Morelli L. Reuterin, Phenyllactic Acid, and Exopolysaccharides as Main Antifungal Molecules Produced by Lactic Acid Bacteria: A Scoping Review. Foods 2024; 13:752. [PMID: 38472865 DOI: 10.3390/foods13050752] [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: 02/02/2024] [Revised: 02/23/2024] [Accepted: 02/27/2024] [Indexed: 03/14/2024] Open
Abstract
The primary goal of this scoping review is to collect, analyze, and critically describe information regarding the role of the main compounds (reuterin, phenyllactic acid, and exopolysaccharides) produced by LAB that possess antifungal properties and provide some suggestions for further research. The use of lactic acid bacteria (LAB) to mitigate spoilage and extend the shelf life of foodstuffs has a long history. Recently, there has been a growing interest in the unique properties of these additions to the foodstuffs in which they are applied. In recent studies regarding biopreservation, significant attention has been given to the role of these microorganisms and their metabolites. This fascinating recent discipline aims not only to replace traditional preservation systems, but also to improve the overall quality of the final product. The biologically active by-products produced by lactic acid bacteria are synthesized under certain conditions (time, temperature, aerobiosis, acidity, water activity, etc.), which can be enacted through one of the oldest approaches to food processing: fermentation (commonly used in the dairy and bakery sectors). This study also delves into the biosynthetic pathways through which they are synthesized, with a particular emphasis on what is known about the mechanisms of action against molds in relation to the type of food.
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Affiliation(s)
- Andrea Ponzio
- Department for Sustainable Food Process, Faculty of Agriculture, Food and Environmental Sciences, Università Cattolica del Sacro Cuore, 29122 Piacenza, Italy
| | - Annalisa Rebecchi
- Department for Sustainable Food Process, Faculty of Agriculture, Food and Environmental Sciences, Università Cattolica del Sacro Cuore, 29122 Piacenza, Italy
| | - Rosanna Zivoli
- Soremartec Italia S.r.l. (Ferrero Group), P.le P. Ferrero 1, 12051 Alba, Italy
| | - Lorenzo Morelli
- Department for Sustainable Food Process, Faculty of Agriculture, Food and Environmental Sciences, Università Cattolica del Sacro Cuore, 29122 Piacenza, Italy
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Ramlan NAFM, Mohamad Azman E, Muhammad K, Jusoh AZ, Johari NA, Yusof YA, Zawawi N. Physicochemical homogeneity of stingless bee honey (Heterotrigona itama) produced in the west coast, east coast and inland area of Peninsular Malaysia. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:1756-1767. [PMID: 37862235 DOI: 10.1002/jsfa.13067] [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: 05/12/2023] [Revised: 09/30/2023] [Accepted: 10/17/2023] [Indexed: 10/22/2023]
Abstract
BACKGROUND The nutritional composition of stingless bee honey (SBH) can be affected by different climates and soil composition across different geographical areas. However, the range of attributes set for a honey quality standard should be inclusive. This study analysed the sugar profile's physiochemical properties, including quantifying the rare sugar trehalulose, organic acid and mineral composition of SBH collected from inland, and west and east coasts of Peninsular Malaysia. Forty-three SBH (Heterotrigona itama) samples were collected and labelled as <20 and <40 West Coast (<20WC, <40WC), <20 and <40 East Coast (<20EC, <40EC) and Inland, according to their distance from the coasts. RESULTS The moisture, pH and sugar composition of all SBH samples adhered to the Malaysian Kelulut Honey Standard (MS2683:2017) but not to the International Codex Standard (CODEX) for honey. Trehalulose presence in all samples, regardless of geographical area, was predominant alongside fructose and glucose. Only hydroxymethylfurfural (HMF) content and electrical conductivity (EC) results complied with both standards. The principal component analysis biplot showed that the discrimination of SBH according to the five different areas was not feasible, indicating sample homogeneity. CONCLUSION The physicochemical evaluation of SBH from Peninsular Malaysia shows mainly homogeneous attributes of samples across geographical locations. These findings demonstrated that the current MS2683:2017 is relevant and accommodates all SBH of H. itama species produced in Peninsular Malaysia. Furthermore, the trehalulose range calculated in this study can be implemented as a new benchmark for the indicator of SBH honey quality standard by national and international food standard committees. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Nurul Ainaa Farhanah Mat Ramlan
- Functional Carbohydrate and Protein Laboratory, Faculty of Food Science and Technology, Universiti Putra Malaysia, Serdang, Malaysia
| | - Ezzat Mohamad Azman
- Department of Food Technology, Faculty of Food Science and Technology, Universiti Putra Malaysia, Serdang, Malaysia
| | - Kharidah Muhammad
- Functional Carbohydrate and Protein Laboratory, Faculty of Food Science and Technology, Universiti Putra Malaysia, Serdang, Malaysia
| | - Arif Zaidi Jusoh
- Food Science and Technology Research Centre, Malaysian Agricultural Research and Development Institute (MARDI), Serdang, Malaysia
| | - Nor Azfa Johari
- National Institute of Biotechnology Malaysia (NIBM), Kajang, Malaysia
| | - Yus Aniza Yusof
- Laboratory of Halal Science Research, Halal Products Research Institute, Universiti Putra Malaysia, Serdang, Malaysia
| | - Norhasnida Zawawi
- Functional Carbohydrate and Protein Laboratory, Faculty of Food Science and Technology, Universiti Putra Malaysia, Serdang, Malaysia
- Laboratory of Halal Science Research, Halal Products Research Institute, Universiti Putra Malaysia, Serdang, Malaysia
- Queensland Alliance for Agriculture and Food Innovation (QAAFI), Health and Food Sciences Precinct, Coopers Plains, The University of Queensland, St Lucia, Australia
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Lin Y, Fang M, Liu J, Zhang Y, Yu Y. Transcriptomic analyses of Vibrio parahaemolyticus under the phenyllactic acid stress. Appl Microbiol Biotechnol 2024; 108:180. [PMID: 38285117 PMCID: PMC10824802 DOI: 10.1007/s00253-024-13024-6] [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: 08/08/2023] [Revised: 12/19/2023] [Accepted: 01/18/2024] [Indexed: 01/30/2024]
Abstract
Phenyllactic acid (PLA) generally recognized as a natural organic acid shows against Vibrio parahaemolyticus activity. In this study, V. parahaemolyticus ATCC17802 (Vp17802) was cultured under the stress of 1/2MIC PLA, and then the antibacterial mechanisms were explored via transcriptomics. The minimum inhibitory concentration (MIC) of PLA against Vp17802 was 3.2 mg/mL, and the time-kill analysis resulted that Vp17802 was inhibited. PLA was able to destroy the bacterial membrane, leading to the leakage of intracellular substances and decline of ATP levels. The RNA-sequencing analysis results indicated that 1616 significantly differentially expressed genes were identified, among which 190 were up-regulated and 1426 were down-regulated. Down-regulation of the icd2 gene in the TCA cycle mediates blockage of tyrosine metabolic, arginine biosynthesis, and oxidative phosphorylation, causing insufficient energy supply of Vp17802. Moreover, PLA could cause amino acids, metal ions, and phosphate transporters to be blocked, affecting the acquisition of nutrients. The treatment by PLA altered the expression of genes encoding functions involved in quorum sensing, flagellar assembly, and cell chemotaxis pathway, which may be interfering with the biofilm formation in Vp17802, reducing cell motility. Overall, 1.6 mg/mL PLA inhibited the growth of Vp17802 by disrupting to uptake of nutrients, cell metabolism, and the formation of biofilms. The results suggested a new direction for exploring the activity of PLA against Vp17802 and provided a theoretical basis for bacterial pathogen control in the food industry. KEY POINTS: •RNA sequencing was carried out to indicate the antibacterial mechanism of Vp17802. •The icd2 gene in the TCA cycle mediates blockage of metabolic of Vp17802. •The biofilm formation has interfered with 1.6 mg/mL PLA, which could reduce cell motility and virulence.
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Affiliation(s)
- Yilin Lin
- South China University of Technology, School of Food Sciences and Engineering, Guangzhou, 510640, China
| | - Meimei Fang
- South China University of Technology, School of Food Sciences and Engineering, Guangzhou, 510640, China
| | - Jun Liu
- Sericulture & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou, 510610, China
| | - Yehui Zhang
- Sericulture & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou, 510610, China.
| | - Yigang Yu
- South China University of Technology, School of Food Sciences and Engineering, Guangzhou, 510640, China.
- South China University of Technology, Research Center of Food Safety and Detection, Guangzhou, 510640, China.
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Wang Y, Du J, Li Q, Tao Y, Cheng Y, Lu J, Wang H. Bioconversion of cellulose and hemicellulose in corn cob into L-lactic acid and xylo-oligosaccharides. Int J Biol Macromol 2023; 253:126775. [PMID: 37699460 DOI: 10.1016/j.ijbiomac.2023.126775] [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: 01/13/2023] [Revised: 08/15/2023] [Accepted: 09/05/2023] [Indexed: 09/14/2023]
Abstract
With the banning of antibiotic chemical feed additives, multi-functional bioactive feed additives have been extensively sought after by the feed industry. In this study, low-cost and renewable corn cobs were treated with liquid hot water and converted into bioactive xylo-oligosaccharides and L-lactic acid after enzymatic hydrolysis, strain activation, and fermentation under mild conditions, which achieved a full utilization of cellulose and hemicellulose in corn cobs. Simultaneous saccharification fermentation after strain activation with enzymatic hydrolysate delivered the highest conversion rate of glucose to L-lactic acid (93.00 %) and yielded 17.38 g/L L-lactic acid and 2.68 g/L xylo-oligosaccharides. On this basis, batch-feeding fermentation resulted in a 78.03 % conversion rate of glucose to L-lactic acid, 18.99 g/L L-lactic acid, and 2.84 g/L xylo-oligosaccharides. This work not only provided a green and clean bioconversion strategy to produce multi-functional feed additives but can also boost the full utilization of renewable and cheap biomass resources.
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Affiliation(s)
- Yiqin Wang
- Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Jian Du
- Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Qiang Li
- College of Engineering, Huazhong Agricultural University, Wuhan 430070, China; College of Horticulture & Forestry Science, Huazhong Agricultural University, Wuhan 430070, China
| | - Yehan Tao
- Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Yi Cheng
- Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Jie Lu
- Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
| | - Haisong Wang
- Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
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Xu H, Cheng Q, Qiu Y, Mao J, Ji Q, Zhu M, Zhang L, Wang Z, Li A, Xia Y. A Novel Strategy for Whole-Cell Biotransformation Enabling Simultaneous l-Phenyllactic Acid Production and Coenzyme Regeneration. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:20772-20781. [PMID: 37963219 DOI: 10.1021/acs.jafc.3c06387] [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: 11/16/2023]
Abstract
l-Phenyllactic acid (l-PLA) is a small molecular organic acid that exhibits a powerful capacity for inhibition against foodborne pathogens. In this work, we developed a new cost-effective and environmentally friendly process for the biosynthesis of l-PLA. This strategy designed a novel whole-cell biotransformation system employing two heterologous enzymes, namely, phenylalanine dehydrogenase (PheDH) and l-hydroxyisocaproate dehydrogenase (l-HicDH). The novelty of this strategy lies in the first-time utilization of these two enzymes, which not only enables cascade catalysis for the production of l-PLA but also facilitates the regeneration of the coenzymes (NAD+/NADH) using only two enzymes rather than introducing more heterologous enzymes to the system. Consequently, this strategy can effectively simplify the biosynthesis process of l-PLA and minimize production costs. The initial l-PLA yield using this process achieved 2.53 ± 0.07 g/L. Furthermore, through meticulous optimization of the parameters for inducible enzyme expression and l-PLA biosynthesis, the l-PLA yield was successfully increased to 4.68 ± 0.04 g/L with a yield rate of 64.54 ± 0.29%. Moreover, this novel strategy is versatile in the biosynthesis of other organic acids, which can be achieved by easily modulating the combinations of substrates and enzymes.
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Affiliation(s)
- Huidong Xu
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Qianqian Cheng
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Yangyu Qiu
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Jingjing Mao
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Qinyi Ji
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Mulan Zhu
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Lili Zhang
- Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Zhouping Wang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Aitao Li
- School of Life Sciences, Hubei University, Wuhan 430062, China
| | - Yu Xia
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
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12
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Li Y, Tang X, Yang Z, He J, Ma N, Huang A, Shi Y. BCp12/PLA combination: A novel antibacterial agent targeting Mur family, DNA gyrase and DHFR. Int J Food Microbiol 2023; 406:110370. [PMID: 37678070 DOI: 10.1016/j.ijfoodmicro.2023.110370] [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: 05/23/2023] [Revised: 08/16/2023] [Accepted: 08/24/2023] [Indexed: 09/09/2023]
Abstract
The combination of natural antimicrobial peptide BCp12/phenyllatic acid (BCp12/PLA) presents a more efficient antibacterial effect, but its antibacterial mechanism remains unclear. This study studied the synergistic antibacterial mechanism of BCp12 and PLA against S. aureus. The results demonstrated that the BCp12/PLA combination presented a synergistic antibacterial effect against S. aureus, with a fractional inhibitory concentration of 0.05. Furthermore, flow cytometry and scanning electron microscope analysis revealed that BCp12 and PLA synergistically promoted cell membrane disruption compared with the group treated only with one compound, inducing structural cell damage and cytoplasmic leakage. In addition, fluorescence spectroscopy analysis suggested that BCp12 and PLA synergistically influenced genomic DNA. BCp12 and PLA targeted enzymes related to peptidoglycan and DNA synthesis and interacted by hydrogen bonding and hydrophobic interactions with mur enzymes (murC, murD, murE, murF, and murG), dihydrofolate reductase, and DNA gyrase. Additionally, the combined treatment successfully inhibited microbial reproduction in the storage of pasteurized milk, indicating that the combination of BCp12 and PLA can be used as a new preservative strategy in food systems. Overall, this study could provide potential strategies for preventing and controlling foodborne pathogens.
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Affiliation(s)
- Yufang Li
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Xiaozhao Tang
- Yunnan Center for Disease Control and Prevention, Kunming 650022, Yunnan, China
| | - Zushun Yang
- Yunnan Center for Disease Control and Prevention, Kunming 650022, Yunnan, China
| | - Jinze He
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Ni Ma
- Yunnan Center for Disease Control and Prevention, Kunming 650022, Yunnan, China
| | - Aixiang Huang
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China.
| | - Yanan Shi
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, Yunnan, China.
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13
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Jia Y, Huang C, Mao Y, Zhou S, Deng Y. Screening and Constructing a Library of Promoter-5'-UTR Complexes with Gradient Strength in Pediococcus acidilactici. ACS Synth Biol 2023; 12:1794-1803. [PMID: 37172276 DOI: 10.1021/acssynbio.3c00067] [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] [Indexed: 05/14/2023]
Abstract
The GRAS (generally recognized as safe) strain Pediococcus acidilactici is well known for its antibacterial and probiotic functions. Furthermore, as P. acidilactici has excellent high temperature and salt resistance, it is an ideal host for the production of food enzymes, food additives, and pharmaceuticals. In this regard, it is desirable and feasible to enhance the production of these products through the metabolic engineering of P. acidilactici. However, the rare gene expression elements greatly obstruct the development of engineering P. acidilactici. In this study, we screened and constructed a library of promoter-5'-UTR (PUTR) complexes in P. acidilactici DY15 for regulating gene expression at the transcription and translation levels. In the post-log phase, the mRNA and protein expression level ranges of the 90 screened native PUTRs were 0.059-2010% and 0.77-245%, respectively, of the P32 promoter. Besides, several PUTRs exhibited great expression stability under high temperature, salt, and ethanol stress. We analyzed the structure of PUTRs and obtained the conserved regions of the promoter and 5'-UTR. Based on the identified core regions of PUTRs, we constructed a panel of combinatorial PUTRs with higher and stable protein expression levels. The strongest combinatorial PUTR was 853% of the P32 promoter in the protein expression level. Finally, the obtained PUTRs were applied to optimize the expression level of aminotransferase and improve the phenyllactic acid (PLA) production in P. acidilactici DY15. The achieved yield was 950.6 mg/L, which was 79.2% higher than the wild-type strain. These results indicated that the obtained PUTRs with gradient strength had great potential for precisely regulating gene expression to achieve various goals in P. acidilactici.
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Affiliation(s)
- Yize Jia
- National Engineering Research Center of Cereal Fermentation and Food Biomanufacturing, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Chao Huang
- National Engineering Research Center of Cereal Fermentation and Food Biomanufacturing, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Yin Mao
- National Engineering Research Center of Cereal Fermentation and Food Biomanufacturing, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Shenghu Zhou
- National Engineering Research Center of Cereal Fermentation and Food Biomanufacturing, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Yu Deng
- National Engineering Research Center of Cereal Fermentation and Food Biomanufacturing, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
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14
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Liu Y, Lu Y, Quan Liu S. Untargeted LC-QTOF-MS/MS-based metabolomics of spent coffee grounds alcoholic beverages fermented with Lachancea thermotolerans and Lactiplantibacillus plantarum. Food Res Int 2023; 167:112733. [PMID: 37087284 DOI: 10.1016/j.foodres.2023.112733] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 03/11/2023] [Accepted: 03/17/2023] [Indexed: 03/29/2023]
Abstract
Spent coffee grounds (SCG) is a solid waste generated from coffee brewing. We recently developed a novel SCG hydrolysate-derived alcoholic beverage fermented with Lachancea thermotolerans Concerto and Lactiplantibacillus plantarum ML Prime. To further understand the potential health benefits of the fermented SCG hydrolysate alcoholic beverage, an untargeted metabolomics-based approach (UPLC-QTOF-MS/MS) was applied to detect and identify bioactive metabolites especially low molecular weight compounds. Our results showed that, compared to yeast monoculture-fermented SCG alcoholic beverages, yeast-lactic acid bacterial coculture enriched the beverage with a range of bioactive compounds especially aromatic and branched-chain amino acid derivatives (e.g., 4-hydroxyphenyl lactic acid, phenyl lactic acid, indole lactic acid, (S)-(-)-2-hydroxyisocaproic acid, and 4-hydroxyphenyl ethanol). Although some endogenous phenolic compounds were metabolized during fermentation, many phenolic metabolites (e.g., vinyl phenols, dihydrocaffeic acid, 3,4-dihydroxybenzoic acid, 4-hydroxycoumarin) were produced. Our study provided a theoretical basis for further valorization of SCG hydrolysates from the health benefits point of view and the findings may be extended to other fermented products.
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15
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Wang Y, Sun X, Hu J, Guo Q, Zhang P, Luo X, Shen B, Fu Y. A two-enzyme system in an amorphous metal-organic framework for the synthesis of D-phenyllactic acid. J Mater Chem B 2023; 11:4227-4236. [PMID: 37114909 DOI: 10.1039/d3tb00126a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
In this study, we synthesized an amorphous metal-organic framework by adjusting the concentration of precursors, and established a two-enzyme system consisting of lactate dehydrogenase (LDH) and glucose dehydrogenase (GDH), which successfully achieved coenzyme recycling, and applied it to the synthesis of D-phenyllactic acid (D-PLA). The prepared two-enzyme-MOF hybrid material was characterized using XRD, SEM/EDS, XPS, FT-IR, TGA, CLSM, etc. In addition, reaction kinetic studies indicated that the MOF-encapsulated two-enzyme system exhibited faster initial reaction velocities than free enzymes due to its amorphous ZIF-generated mesoporous structure. Furthermore, the pH stability and temperature stability of the biocatalyst were evaluated, and the results indicated a significant improvement compared to the free enzymes. Moreover, the amorphous structure of the mesopores still maintained the shielding effect and protected the enzyme structure from damage by proteinase K and organic solvents. Finally, the remaining activity of the biocatalyst for the synthesis of D-PLA reached 77% after 6 cycles of use, and the coenzyme regeneration still maintained at 63%, while the biocatalyst also retained 70% and 68% residual activity for the synthesis of D-PLA after 12 days of storage at 4 °C and 25 °C, respectively. This study provides a reference for the design of MOF-based multi-enzyme biocatalysts.
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Affiliation(s)
- Yifeng Wang
- Taizhou Key Laboratory of Biomass Functional Materials Development and Application, Taizhou University, Jiaojiang 318000, Zhejiang, China.
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, Jiangsu 210023, China.
| | - Xiaolong Sun
- Taizhou Key Laboratory of Biomass Functional Materials Development and Application, Taizhou University, Jiaojiang 318000, Zhejiang, China.
| | - Jiahuan Hu
- Taizhou Key Laboratory of Biomass Functional Materials Development and Application, Taizhou University, Jiaojiang 318000, Zhejiang, China.
| | - Qing Guo
- Taizhou Key Laboratory of Biomass Functional Materials Development and Application, Taizhou University, Jiaojiang 318000, Zhejiang, China.
- School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, Zhejiang 310023, China
| | - Ping Zhang
- Zhejiang Kingsun Eco-Pack Co., Ltd., Xianju, Zhejiang 317300, China
| | - Xi Luo
- Taizhou Key Laboratory of Biomass Functional Materials Development and Application, Taizhou University, Jiaojiang 318000, Zhejiang, China.
| | - Baoxing Shen
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, Jiangsu 210023, China.
| | - Yongqian Fu
- Taizhou Key Laboratory of Biomass Functional Materials Development and Application, Taizhou University, Jiaojiang 318000, Zhejiang, China.
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16
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Parks HM, Cinelli MA, Bedewitz MA, Grabar JM, Hurney SM, Walker KD, Jones AD, Barry CS. Redirecting tropane alkaloid metabolism reveals pyrrolidine alkaloid diversity in Atropa belladonna. THE NEW PHYTOLOGIST 2023; 237:1810-1825. [PMID: 36451537 PMCID: PMC10107824 DOI: 10.1111/nph.18651] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Abstract
Plant-specialized metabolism is complex, with frequent examples of highly branched biosynthetic pathways, and shared chemical intermediates. As such, many plant-specialized metabolic networks are poorly characterized. The N-methyl Δ1 -pyrrolinium cation is a simple pyrrolidine alkaloid and precursor of pharmacologically important tropane alkaloids. Silencing of pyrrolidine ketide synthase (AbPyKS) in the roots of Atropa belladonna (Deadly Nightshade) reduces tropane alkaloid abundance and causes high N-methyl Δ1 -pyrrolinium cation accumulation. The consequences of this metabolic shift on alkaloid metabolism are unknown. In this study, we utilized discovery metabolomics coupled with AbPyKS silencing to reveal major changes in the root alkaloid metabolome of A. belladonna. We discovered and annotated almost 40 pyrrolidine alkaloids that increase when AbPyKS activity is reduced. Suppression of phenyllactate biosynthesis, combined with metabolic engineering in planta, and chemical synthesis indicates several of these pyrrolidines share a core structure formed through the nonenzymatic Mannich-like decarboxylative condensation of the N-methyl Δ1 -pyrrolinium cation with 2-O-malonylphenyllactate. Decoration of this core scaffold through hydroxylation and glycosylation leads to mono- and dipyrrolidine alkaloid diversity. This study reveals the previously unknown complexity of the A. belladonna root metabolome and creates a foundation for future investigation into the biosynthesis, function, and potential utility of these novel alkaloids.
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Affiliation(s)
- Hannah M. Parks
- Department of Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMI48824USA
| | - Maris A. Cinelli
- Department of Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMI48824USA
| | | | - Josh M. Grabar
- Department of HorticultureMichigan State UniversityEast LansingMI48824USA
| | - Steven M. Hurney
- Department of ChemistryMichigan State UniversityEast LansingMI48824USA
| | - Kevin D. Walker
- Department of Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMI48824USA
- Department of ChemistryMichigan State UniversityEast LansingMI48824USA
| | - A. Daniel Jones
- Department of Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMI48824USA
| | - Cornelius S. Barry
- Department of HorticultureMichigan State UniversityEast LansingMI48824USA
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17
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Wu H, Guang C, Zhang W, Mu W. Recent development of phenyllactic acid: physicochemical properties, biotechnological production strategies and applications. Crit Rev Biotechnol 2023; 43:293-308. [PMID: 34965820 DOI: 10.1080/07388551.2021.2010645] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Phenyllactic acid (PLA) is capable of inhibiting the growth of many microorganisms, showing a broad-spectrum antimicrobial property, which allows it to hold vast applications in the: food, feed, pharmaceutical, and cosmetic industries, especially in the field of food safety. Recently, the production of PLA has garnered considerable attention due to the increasing awareness of food safety from the public. Accordingly, this review mainly updates the recent development for the production of PLA through microbial fermentation and whole-cell catalysis (expression single-, double-, and triple-enzyme) strategies. Firstly, the: physicochemical properties, existing sources, and measurement methods of PLA are systematically covered. Then, the inhibition spectrum of PLA is summarized, and synchronously, the antimicrobial and anti-biofilm mechanisms of PLA on commonly pathogenic microorganisms in foods are described in detail, thereby clarifying the reason for extending the shelf life of foods. Additionally, the factors affecting the production of PLA are summarized from the biosynthesis and catabolism pathway of PLA in microorganisms, as well as external environmental parameters insights. Finally, the downstream treatment process and applications of PLA are discussed and outlined. In the future, clinical data should be supplemented with the metabolic kinetics of PLA in humans and to evaluate animal toxicology, to enable regulatory use of PLA as a food additive. A food-grade host, such as Bacillus subtilis and Lactococcus lactis, should also be developed as a cell vector expressing enzymes for PLA production from a food safety perspective.
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Affiliation(s)
- Hao Wu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.,School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, China
| | - Cuie Guang
- 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, Jiangsu 214122, China
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18
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Lee M, Yun YR, Choi EJ, Song JH, Kang JY, Kim D, Lee KW, Chang JY. Anti-obesity effect of vegetable juice fermented with lactic acid bacteria isolated from kimchi in C57BL/6J mice and human mesenchymal stem cells. Food Funct 2023; 14:1349-1356. [PMID: 36630124 DOI: 10.1039/d2fo02998g] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
This study aimed to investigate the effect of fermented vegetable juice (VJ) obtained from a blend of four crops (Brassica oleracea var. capitata, B. oleracea var. italica, Daucus carota L., and Beta vulgaris) on adipogenesis along with the identification of active compounds. Two lactic acid bacteria (LAB) (Companilactobacillus allii WiKim39 and Lactococcus lactis WiKim0124), isolated from kimchi, were used to ferment the VJ and their effectiveness was evaluated in differentiated human mesenchymal stem cells and obese mice. In vitro antibody array analysis was done to understand signaling proteins in adipogenesis. Gene Ontology enrichment analysis showed that differentially expressed proteins are related to biological processes including immunological processes. These were effectively regulated by LAB and fermented VJ. Supplementation of fermented VJ reduced the weight gain, blood biochemical indicators, and liver fat accumulation in mice. Oil Red O staining indicated that the fermentation metabolites of VJ (indole-3-lactic acid, leucic acid, and phenyllactic acid) had an inhibitory effect on lipid accumulation in vitro. Therefore, it can be concluded that LAB-fermented VJ and its metabolites have the potential to counter obesity, and thus can be therapeutically effective.
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Affiliation(s)
- Moeun Lee
- Research and Development Division, World Institute of Kimchi, Gwangju 61755, Korea. .,Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Korea.
| | - Ye-Rang Yun
- Research and Development Division, World Institute of Kimchi, Gwangju 61755, Korea.
| | - Eun Ji Choi
- Research and Development Division, World Institute of Kimchi, Gwangju 61755, Korea.
| | - Jung Hee Song
- Research and Development Division, World Institute of Kimchi, Gwangju 61755, Korea.
| | - Jin Yong Kang
- Research and Development Division, World Institute of Kimchi, Gwangju 61755, Korea.
| | - Daun Kim
- Research and Development Division, World Institute of Kimchi, Gwangju 61755, Korea.
| | - Ki Won Lee
- Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Korea. .,Advanced Institutes of Convergence Technology, Seoul National University, Suwon 16229, Korea
| | - Ji Yoon Chang
- Research and Development Division, World Institute of Kimchi, Gwangju 61755, Korea.
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19
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Wenger A, Bär C, Portmann R, Schmidt RS, Eugster E, Weisskopf L, Irmler S. The aminotransferase Aat initiates 3-phenyllactic acid biosynthesis in Pediococcus acidilactici. Front Microbiol 2023; 14:1150425. [PMID: 37187531 PMCID: PMC10175570 DOI: 10.3389/fmicb.2023.1150425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 04/14/2023] [Indexed: 05/17/2023] Open
Abstract
The function of the aminotransferase Aat (GenBank Protein WP_159211138) from Pediococcus acidilactici FAM 18098 was studied in vivo. For this purpose, the gene was replaced with an erythromycin resistance gene using the temperature-sensitive Escherichia coli-Pediococcus shuttle plasmid pSET4T_Δaat. The knockout was verified by PCR and genome sequencing. Subsequently, the differences between the metabolism of the knockout and of the wild-type strain were investigated by determining the free amino acids and organic acids in culture supernatants. It was found that the knockout mutant no longer synthesized 3-phenyllactic acid (PLA) and 4-hydroxyphenyllactic acid (HPLA). Additionally, the mutant strain no longer catabolized phenylalanine. Metabolic pathway analysis using the KEGG database indicate that P. acidilactici cannot synthesize α-ketoglutarate that is a predominant amino-group acceptor in many transamination reactions. To study the transfer of the amino group of phenylalanine, the wild-type strain was incubated with [15N] phenylalanine. Mass spectrometry showed that during fermentation, [15N] alanine was formed, indicating that pyruvic acid is an amino group acceptor in P. acidilactici. The present study shows that Aat plays a crucial role in PLA/HPLA biosynthesis and pyruvic acid is an amino acceptor in transamination reactions in P. acidilactici.
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Affiliation(s)
- Alexander Wenger
- Agroscope, Bern, Switzerland
- Department of Biology, University of Fribourg, Fribourg, Switzerland
| | | | | | | | - Elisabeth Eugster
- School of Agricultural, Forest and Food Sciences HAFL, Bern University of Applied Sciences, Zollikofen, Switzerland
| | - Laure Weisskopf
- Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Stefan Irmler
- Agroscope, Bern, Switzerland
- *Correspondence: Stefan Irmler,
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20
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Zhong Y, Wang T, Luo R, Liu J, Jin R, Peng X. Recent advances and potentiality of postbiotics in the food industry: Composition, inactivation methods, current applications in metabolic syndrome, and future trends. Crit Rev Food Sci Nutr 2022; 64:5768-5792. [PMID: 36537328 DOI: 10.1080/10408398.2022.2158174] [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] [Indexed: 12/24/2022]
Abstract
Postbiotics are defined as "preparation of inanimate microorganisms and/or their components that confers a health benefit on the host". Postbiotics have unique advantages over probiotics, such as stability, safety, and wide application. Although postbiotics are research hotspots, the research on them is still very limited. This review provides comprehensive information on the scope of postbiotics, the preparation methods of inanimate microorganisms, and the application and mechanisms of postbiotics in metabolic syndrome (MetS). Furthermore, the application trends of postbiotics in the food industry are reviewed. It was found that postbiotics mainly include inactivated microorganisms, microbial lysates, cell components, and metabolites. Thermal treatments are the main methods to prepare inanimate microorganisms as postbiotics, while non-thermal treatments, such as ionizing radiation, ultraviolet light, ultrasound, and supercritical CO2, show great potential in postbiotic preparation. Postbiotics could ameliorate MetS through multiple pathways including the modulation of gut microbiota, the enhancement of intestinal barrier, the regulation of inflammation and immunity, and the modulation of hormone homeostasis. Additionally, postbiotics have great potential in the food industry as functional food supplements, food quality improvers, and food preservatives. In addition, the SWOT analyses showed that the development of postbiotics in the food industry exists both opportunities and challenges.
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Affiliation(s)
- Yujie Zhong
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Tao Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, China
| | - Ruilin Luo
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Jiayu Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Ruyi Jin
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Xiaoli Peng
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
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21
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Li T, Qin Z, Wang D, Xia X, Zhou X, Hu G. Coenzyme self-sufficiency system-recent advances in microbial production of high-value chemical phenyllactic acid. World J Microbiol Biotechnol 2022; 39:36. [PMID: 36472665 DOI: 10.1007/s11274-022-03480-5] [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: 09/23/2022] [Accepted: 11/21/2022] [Indexed: 12/12/2022]
Abstract
Phenyllactic acid (PLA), a natural antimicrobial substance, has many potential applications in the food, animal feed, pharmaceutical and cosmetic industries. However, its production is limited by the complex reaction steps involved in its chemical synthesis. Through advances in metabolic engineering and synthetic biology strategies, enzymatic or whole-cell catalysis was developed as an alternative method for PLA production. Herein, we review recent developments in metabolic engineering and synthetic biology strategies that promote the microbial production of high-value PLA. Specially, the advantages and disadvantages of the using of the three kinds of substrates, which includes phenylpyruvate, phenylalanine and glucose as starting materials by natural or engineered microbes is summarized. Notably, the bio-conversion of PLA often requires the consumption of expensive coenzyme NADH. To overcome the issues of NADH regeneration, efficiently internal cofactor regeneration systems constructed by co-expressing different enzyme combinations composed of lactate dehydrogenase with others for enhancing the PLA production, as well as their possible improvements, are discussed. In particular, the construction of fusion proteins with different linkers can achieve higher PLA yield and more efficient cofactor regeneration than that of multi-enzyme co-expression. Overall, this review provides a comprehensive overview of PLA biosynthesis pathways and strategies for increasing PLA yield through biotechnology, providing future directions for the large-scale commercial production of PLA and the expansion of downstream applications.
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Affiliation(s)
- Tinglan Li
- School of Chemistry and Chemical Engineering, Chongqing University, 400044, Chongqing, P. R. China
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, P. R. China
| | - Zhao Qin
- School of Chemistry and Chemical Engineering, Chongqing University, 400044, Chongqing, P. R. China
| | - Dan Wang
- School of Chemistry and Chemical Engineering, Chongqing University, 400044, Chongqing, P. R. China.
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, P. R. China.
| | - Xue Xia
- School of Chemistry and Chemical Engineering, Chongqing University, 400044, Chongqing, P. R. China
| | - Xiaojie Zhou
- School of Chemistry and Chemical Engineering, Chongqing University, 400044, Chongqing, P. R. China
| | - Ge Hu
- School of Chemistry and Chemical Engineering, Chongqing University, 400044, Chongqing, P. R. China
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Meruvu H. Redefining methods for augmenting lactic acid bacteria robustness and phenyllactic acid biocatalysis: Integration valorizes simplicity. Crit Rev Food Sci Nutr 2022; 64:4397-4409. [PMID: 36322699 DOI: 10.1080/10408398.2022.2141681] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The production of phenyllactic acid (PLA) has been reported by several researchers, but so far, no mention has been made of augmented PLA production using an orchestrated assembly of simple techniques integrated to improve lactic acid bacteria (LAB) metabolism for the same. This review summarizes sequentially tailoring LAB growth and metabolism for augmented PLA catalysis through several strategies like monitoring LAB sustenance by choosing appropriate starter PLA-producing LAB strains isolated from natural environments, with desirably fastidious growth rates, properties like acidification, proteolysis, bacteriophage-resistance, aromatic/texturing-features, etc.; entrapping chosen LAB strains in novel cryogels and/or co-cultivating two/more LAB strains to improve their biotransformation potential and promote growth dependency/sustainability; adopting adaptive evolution methods designed to improve LAB strains under selection pressure inducing desired phenotypes tolerant to stress factors like heat, salt, acid, and solvent; monitoring physico-chemical LAB fermentation factors like temperature, pH, dissolved oxygen content, enzymes, and cofactors for PLA biosynthesis; and modulating purification/downstream processes to extract substantial PLA yields. This review paper serves as a comprehensive preliminary guide that can evoke a strategic experimental plan to produce industrial-scale PLA yields using simple techniques orchestrated together in the pursuit of conserving time, effort, and resources.
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Affiliation(s)
- Haritha Meruvu
- Department of Food Engineering, Faculty of Engineering, İzmir Institute of Technology, Urla, İzmir, Turkey
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Qian Y, Li Y, Tang Z, Wang R, Zeng M, Liu Z. The role of AI-2/LuxS system in biopreservation of fresh refrigerated shrimp: Enhancement in competitiveness of Lactiplantibacillus plantarum for nutrients. Food Res Int 2022; 161:111838. [DOI: 10.1016/j.foodres.2022.111838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 08/13/2022] [Accepted: 08/21/2022] [Indexed: 11/04/2022]
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Physicochemical Profile, Antioxidant and Antimicrobial Activities of Honeys Produced in Minas Gerais (Brazil). Antibiotics (Basel) 2022; 11:antibiotics11101429. [PMID: 36290087 PMCID: PMC9598309 DOI: 10.3390/antibiotics11101429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 10/11/2022] [Accepted: 10/14/2022] [Indexed: 11/29/2022] Open
Abstract
Honeys can be classified as polyfloral or monofloral and have been extensively studied due to an increased interest in their consumption. There is concern with the correct identification of their flowering, the use of analyses that guarantee their physicochemical quality and the quantification of some compounds such as phenolics, to determine their antioxidant and antimicrobial action. This study aims at botanical identification, physicochemical analyses, and the determination of total polyphenols, chromatographic profile and antiradical and antimicrobial activity of honey from different regions of Minas Gerais. Seven different samples were analyzed for the presence of pollen, and color determination. The physicochemical analyses performed were total acidity, moisture, HMF, reducing sugar, and apparent sucrose. The compound profile was determined by UHPLC/MS, the determination of total phenolics and antiradical activity (DPPH method) were performed by spectrophotometry, and minimum inhibitory and bacterial concentrations were determined for cariogenic bacteria. All honey samples met the quality standards required by international legislation, twenty compounds were detected as the main ones, the polyfloral honey was the only honey that inhibited all of the bacteria tested. Sample M6 (Coffee) was the one with the highest amount of total polyphenols, while the lowest was M4 (Cipó-uva). Regarding the antioxidant activity, M5 (Velame) had the best result and M4 (Cipó-uva) was the one that least inhibited oxidation. Of the polyfloral honeys, there was not as high a concentration of phenolic compounds as in the others. Coffee, Aroeira, Velame and Polyfloral have the best anti-radical actions. Betônica, Aroeira, Cipó-uva and Pequi inhibited only some bacteria. The best bacterial inhibition results are from Polyfloral.
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Ghiboub M, Penny S, Verburgt CM, Boneh RS, Wine E, Cohen A, Dunn KA, Pinto DM, Benninga MA, de Jonge WJ, Levine A, Van Limbergen JE. Metabolome Changes With Diet-Induced Remission in Pediatric Crohn's Disease. Gastroenterology 2022; 163:922-936.e15. [PMID: 35679949 DOI: 10.1053/j.gastro.2022.05.050] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 05/18/2022] [Accepted: 05/30/2022] [Indexed: 12/18/2022]
Abstract
BACKGROUND & AIMS The Crohn's disease (CD) exclusion diet (CDED) plus partial enteral nutrition (PEN) and exclusive enteral nutrition (EEN) both induce remission in pediatric CD. CDED+PEN is better tolerated and able to sustain remission. We characterized the changes in fecal metabolites induced by CDED+PEN and EEN and their relationship with remission. METHODS A total of 216 fecal metabolites were measured in 80 fecal samples at week (W) 0, W6, and W12, of children with mild to moderate CD in a prospective randomized trial comparing CDED+PEN vs EEN. The metabolites were measured using liquid chromatography coupled to mass spectrometry. Metagenome Kyoto Encyclopedia of Genes and Genomes Orthology analysis was performed to investigate the differential functional gene abundance involved in specific metabolic pathways. Data were analyzed according to clinical outcome of remission (W6_rem), no remission (W6_nr), sustained remission (W12_sr), and nonsustained (W12_nsr) remission. RESULTS A decrease in kynurenine and succinate synthesis and an increase in N-α-acetyl-arginine characterized CDED+PEN W6_rem, whereas changes in lipid metabolism characterized EEN W6_rem, especially reflected by lower levels in ceramides. In contrast, fecal metabolites in EEN W6_nr were comparable to baseline/W0 samples. CDED+PEN W6_rem children maintained metabolome changes through W12. In contrast, W12_nsr children in the EEN group, who resumed a free diet after week 6, did not. The metabolome of CDED+PEN differed from EEN in the purine, pyrimidine, and sphingolipid pathways. A significant differential abundance in several genes involved in these pathways was detected. CONCLUSION CDED+PEN- and EEN-induced remission are associated with significant changes in inflammatory bowel disease-associated metabolites such as kynurenine, ceramides, amino acids, and others. Sustained remission with CDED+PEN, but not EEN, was associated with persistent changes in metabolites. CLINICALTRIALS gov, Number NCT01728870.
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Affiliation(s)
- Mohammed Ghiboub
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology Endocrinology Metabolism, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands; Department of Pediatric Gastroenterology and Nutrition, Amsterdam University Medical Centers, Emma Children's Hospital, Amsterdam, the Netherlands
| | - Susanne Penny
- National Research Council Canada, Human Health Therapeutics, Halifax, Canada
| | - Charlotte M Verburgt
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology Endocrinology Metabolism, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands; Department of Pediatric Gastroenterology and Nutrition, Amsterdam University Medical Centers, Emma Children's Hospital, Amsterdam, the Netherlands
| | - Rotem Sigall Boneh
- Division of Pediatric Gastroenterology, Wolfson Medical Centre, Holon, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Eytan Wine
- Division of Pediatric Gastroenterology, Department of Pediatrics, University of Alberta, Edmonton, Canada
| | - Alejandro Cohen
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, Canada
| | | | - Devanand M Pinto
- National Research Council Canada, Human Health Therapeutics, Halifax, Canada
| | - Marc A Benninga
- Department of Pediatric Gastroenterology and Nutrition, Amsterdam University Medical Centers, Emma Children's Hospital, Amsterdam, the Netherlands
| | - Wouter J de Jonge
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology Endocrinology Metabolism, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands; Department of Surgery, University Hospital of Bonn, Bonn, Germany
| | - Arie Levine
- Division of Pediatric Gastroenterology, Wolfson Medical Centre, Holon, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Johan E Van Limbergen
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology Endocrinology Metabolism, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands; Department of Pediatric Gastroenterology and Nutrition, Amsterdam University Medical Centers, Emma Children's Hospital, Amsterdam, the Netherlands; Department of Pediatrics, Dalhousie University, Halifax, Canada.
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Jiang YH, Ying JP, Xin WG, Yang LY, Li XZ, Zhang QL. Antibacterial activity and action target of phenyllactic acid against Staphylococcus aureus and its application in skim milk and cheese. J Dairy Sci 2022; 105:9463-9475. [DOI: 10.3168/jds.2022-22262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 07/22/2022] [Indexed: 11/06/2022]
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Shakya S, Danshiitsoodol N, Noda M, Inoue Y, Sugiyama M. 3-Phenyllactic acid generated in medicinal plant extracts fermented with plant-derived lactic acid bacteria inhibits the biofilm synthesis of Aggregatibacter actinomycetemcomitans. Front Microbiol 2022; 13:991144. [PMID: 36212837 PMCID: PMC9539679 DOI: 10.3389/fmicb.2022.991144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 09/07/2022] [Indexed: 11/13/2022] Open
Abstract
In the present study, the effect of PLA on a periodontic pathogen, Aggregatibacter actinomycetemcomitans (A. actinomycetemcomitans), the biofilm, and virulence-related genes was investigated. We confirmed that two lactic acid bacteria (LAB) strains isolated from plant sources, Lactiplantibacillus plantarum MSC-C2 and Pediococcus pentosaceus K40, secrete PLA into the de Man, Rogosa & Sharpe (MRS) broth when supplemented with phenyl pyruvic acid (PPA) as a precursor to PLA. Moreover, PLA was generated in the fermentation broths of two medicinal plant extracts, Paeonia lactiflora Pall (PR) and Carthamus tinctorius (CT), when used by each LAB strain and each extract supplemented with PPA. We determined that the minimum inhibitory concentration (MIC) of PLA against A. actinomycetemcomitans was 20 mM. PLA significantly decreased biofilm formation and suppressed the transcription of pgA, ltxA, and cdtB genes, which encode the poly-N-acetylglucosamine (PGA) polysaccharide of biofilm matrix and exotoxins leukotoxin and cytolethal distending toxin (CDT), respectively. The PLA produced by the MSC-C2 and K40 strains was increased several times by the addition of PPA to the MRS broth. The anti-biofilm effect of the extracts from the fermentation broth was proportional to the increasing PLA concentration, while a cumulatively higher effect than that of PLA alone suggested a combinational effect of PLA and the other metabolites, such as lactic acid (LA). Among the two medicinal plants, PLA, produced after the addition of PPA, was higher in PR extract in case of both the LAB strains. PLA production by the MSC-C2 strain in the PR extract reached 4.8 ± 0.23 mM, which was obviously higher than that in the MRS broth (3.88 ± 0.12 mM) supplemented with 1 mg/ml PPA. The activity to inhibit biofilm formation in the fermented PR extract was clearly high. PLA formed in the fermented PR extract downregulated the dispersin B encoding the dspB gene together with pgA, ltxA, and cdtB. In conclusion, this study shows a promising activity of PLA against the A. actinomycetemcomitans biofilm and virulence genes. In addition, the combinational effect of PLA and the medicinal plant extract can be achieved by fermentation with a specific plant-derived LAB strain.
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Antifungal activity of lactic acid bacteria and their application in food biopreservation. ADVANCES IN APPLIED MICROBIOLOGY 2022; 120:33-77. [PMID: 36243452 DOI: 10.1016/bs.aambs.2022.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Lactic acid bacteria (LAB) are ubiquitous bacteria associated with spontaneous lactic fermentation of vegetables, dairy and meat products. They are generally recognized as safe (GRAS), and they are involved in transformation of probiotic lacto-fermented foods, highly desired for their nutraceutical properties. The antifungal activity is one of the exciting properties of LAB, because of its possible application in food bio-preservation, as alternative to chemical preservatives. Many recent research works have been developed on antifungal activity of LAB, and they demonstrate their capacity to produce various antifungal compounds, (i.e. organic acids, PLA, proteinaceous compounds, peptides, cyclic dipeptides, fatty acids, and other compounds), of different properties (hydrophilic, hydrophobic and amphiphilic). The effectiveness of LAB in controlling spoilage and pathogenic fungi, demonstrated in different agricultural and food products, can be due to the synergistic effect between their antifungal compounds of different properties; where the amphiphilic-compounds allow the contact between the target microbial cell (hydrophilic compartment) and antifungal hydrophobic-compounds. Further studies on the interaction between compounds of these three properties are to de be developed, in order to highlight more their mechanism of action, and make LAB more profitable in improving shelf life and nutraceutical properties of foods.
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Cheng YY, Park TH, Seong H, Kim TJ, Han NS. Biological characterization of D-lactate dehydrogenase responsible for high-yield production of D-phenyllactic acid in Sporolactobacillus inulinus. Microb Biotechnol 2022; 15:2717-2729. [PMID: 35921426 PMCID: PMC9618312 DOI: 10.1111/1751-7915.14125] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 07/12/2022] [Accepted: 07/21/2022] [Indexed: 01/05/2023] Open
Abstract
PLA (3‐D‐phenyllactic acid) is an ideal antimicrobial and immune regulatory compound present in honey and fermented foods. Sporolactobacillus inulinus is regarded as a potent D‐PLA producer that reduces phenylpyruvate (PPA) with D‐lactate dehydrogenases. In this study, PLA was produced by whole‐cell bioconversion of S. inulinus ATCC 15538. Three genes encoding D‐lactate dehydrogenase (d‐ldh1, d‐ldh2, and d‐ldh3) were cloned and expressed in Escherichia coli BL21 (DE3), and their biochemical and structural properties were characterized. Consequently, a high concentration of pure D‐PLA (47 mM) was produced with a high conversion yield of 88%. Among the three enzymes, D‐LDH1 was responsible for the efficient conversion of PPA to PLA with kinetic parameters of Km (0.36 mM), kcat (481.10 s−1), and kcat/Km (1336.39 mM−1 s−1). In silico structural analysis and site‐directed mutagenesis revealed that the Ile307 in D‐LDH1 is a key residue for excellent PPA reduction with low steric hindrance at the substrate entrance. This study highlights that S. inulinus ATCC 15538 is an excellent PLA producer, equipped with a highly specific and efficient D‐LDH1 enzyme.
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Affiliation(s)
- Ya-Yun Cheng
- Brain Korea 21 Center for Bio-Health Industry, Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Korea
| | - Tae Hyeon Park
- Brain Korea 21 Center for Bio-Health Industry, Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Korea
| | - Hyunbin Seong
- Brain Korea 21 Center for Bio-Health Industry, Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Korea
| | - Tae-Jip Kim
- Brain Korea 21 Center for Bio-Health Industry, Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Korea
| | - Nam Soo Han
- Brain Korea 21 Center for Bio-Health Industry, Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Korea
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Lactate dehydrogenase encapsulated in a metal-organic framework: A novel stable and reusable biocatalyst for the synthesis of D-phenyllactic acid. Colloids Surf B Biointerfaces 2022; 216:112604. [PMID: 35636328 DOI: 10.1016/j.colsurfb.2022.112604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 05/18/2022] [Accepted: 05/24/2022] [Indexed: 01/01/2023]
Abstract
In this study, we synthesized a novel biocatalyst by encapsulating lactate dehydrogenase (LDH) in the metal-organic framework ZIF-90 by one-pot embedding. It showed strong biological activity for efficient synthesis of D-phenyllactic acid (D-PLA). The morphology and structure of LDH@ZIF-90 was systematically characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, confocal laser scanning microscopy (CLSM) and gas sorption. According to thermogravimetric analysis (TGA), the enzyme loading of the biocatalyst was 3 %. The Michaelis-Menten constant (Km) and maximal reaction rate (Vmax) of LDH@ZIF-90 were similar to those of free LDH, which proved that ZIF-90 had good biocompatibility to encapsulate LDH. At the same time, LDH@ZIF-90 exhibited enhanced tolerance to temperature, pH and organic solvents, and its reusability was greatly improved with 68 % of initial enzyme activity remaining after 7 rounds of recylcing. Overall, LDH encapsulated in ZIF-90 may be an economically competitive and environmentally friendly novel biocatalyst for the synthesis of D-PLA.
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31
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Valorization of Spent Sugarcane Fermentation Broth as a Source of Phenolic Compounds. Processes (Basel) 2022. [DOI: 10.3390/pr10071339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A methodology based on a solid phase extraction (SPE) was optimized for the recovery of phenolic compounds from the spent fermentation broth generated from Biofene® (trans-β-farnesene) production. For this purpose, two resins (XAD-2 and HP-20) and three desorption solutions (water, 50/50 ethanol/water, and ethanol) were tested. The most efficient resin revealed to be the HP-20, using ethanol as desorption solution, reaching an overall total phenolic compound recovery of ca. 80% when 6 BV (bed volume) of both feed and ethanol were applied. The optimization of the resin’s process cycle pointed to 15 BV feed to be treated per cycle and using the same volume of ethanol in the desorption step, with no need for an extra resin regeneration step, stably yielding 48% total phenolic compound recovery from the spent broth for at least 4 cycles, translating into 60 BV of feed being treated per BV of resin, and with the resin being still perfectly active. The extract was characterized using LC−ESI−UHR−QqTOF−MS, and a total of 82 and 15 compounds were identified, in negative and positive ionization modes, respectively. Organic acids were the main class of compounds identified in the phenolic-rich extract, followed by phenolic compounds, saccharides, peptides or amino acids and vitamins. Additionally, the extract revealed a significant antioxidant capacity (914.1 ± 51.6 and 2764.5 ± 142.8 µmol Trolox equivalents/g-dw, respectively, with ABTS and ORAC methodologies), which might be interesting for a wide variety of applications.
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Sun X, Shi J, Kong L, Shen Q, Zeng X, Wu Z, Guo Y, Pan D. Recent insights into the hepatoprotective effects of lactic acid bacteria in alcoholic liver disease. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2022.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Liu Y, Wang R, Wang D, Sun Z, Liu F, Zhang D, Wang D. Development of a food packaging antibacterial hydrogel based on gelatin, chitosan, and 3-phenyllactic acid for the shelf-life extension of chilled chicken. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107546] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Effect of phenyllactic acid on silage fermentation and bacterial community of reed canary grass on the Qinghai Tibetan Plateau. BMC Microbiol 2022; 22:83. [PMID: 35354370 PMCID: PMC8966296 DOI: 10.1186/s12866-022-02499-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 02/17/2022] [Indexed: 11/30/2022] Open
Abstract
Background This study aimed to investigate the effect of phenyllactic acid as an additive on silage fermentation and bacterial community of reed canary grass (RCG, Phalaris arundinacea L.) on the Qinghai Tibetan Plateau. At the heading stage, RCG was harvested, chopped and ensiled in small bag silos. The silage was treated without (control, 1.0 g/mL sterile water, on a fresh matter basis (FM)) or with phenyllactic acid (PLA, 3 mg/mL, FM), antimicrobial additive (PSB, a mixture of potassium sorbate and sodium benzoate, 2%, FM), lactic acid bacteria inoculant (LABi, L. plantarum + L. curvatus, 1 × 106 cfu/g, FM) and PLA + LABi, and then stored in a dark room at the ambient temperature (5 ~ 15 °C) for 60 days. Results Compared with control, PLA decreased lactic acid, acetic acid and ammonia-N contents, and subsequently increased CP content of RCG silage. PLA enhanced the growth of lactic acid bacteria and reduced the count of yeasts (P < 0.05) in RCG silage, with reduced bacterial richness index (Chao1), observed operational taxonomic units and diversity index (Simpson). In relative to control, moreover, PLA and PLA + LABi increased the relative abundance of Lactococcus in RCG silage by 27.73 and 16.93%, respectively. Conclusions Therefore, phenyllactic acid at ensiling improved nutritional quality of RCG silage by advancing the disappearance of yeasts and the dominance of Lactococcus.
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Meruvu H, Harsa ST. Lactic acid bacteria: isolation-characterization approaches and industrial applications. Crit Rev Food Sci Nutr 2022; 63:8337-8356. [PMID: 35348017 DOI: 10.1080/10408398.2022.2054936] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The current state-of-art research pertaining to lactic acid bacteria (LAB) calls for the screening and isolation of robust LAB strains to achieve holistic exploitation of LAB and their metabolites of marketable importance. Hence it is imperative to comprehend LAB sources, growth requisites, isolation and characterization strategies necessary for featured cataloging and appropriate culturing. This review comprehensively describes various growth media and biomasses used for supporting LAB sustenance, assay procedures needed for the isolation and characterization of LAB strains, and their application in diverse sectors. The various industrial patents and their summarized claims about novel LAB strains isolated and identified, methods and media (used for detection/screening, isolation, adaptation, culturing, preservation, growth improvement), the techniques and/or methodologies supporting LAB fermentation, and applications of produced industrial metabolites in various market scenarios are detailed.
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Affiliation(s)
- Haritha Meruvu
- CEO, Revathi Hospital, Revathi Firm, Rajahmundry, Andhra Pradesh, India
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Sebnem Tellioglu Harsa
- Faculty of Engineering, Department of Food Engineering, İzmir Institute of Technology, Gulbahçe Campus, Urla, İzmir, Turkey
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Energy metabolism as the target of 3-phenyllactic acid against Rhizopus oryzae. Int J Food Microbiol 2022; 369:109606. [DOI: 10.1016/j.ijfoodmicro.2022.109606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 02/19/2022] [Accepted: 02/26/2022] [Indexed: 11/20/2022]
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Qian Y, Li Y, Xu T, Zhao H, Zeng M, Liu Z. Dissecting of the AI-2/LuxS Mediated Growth Characteristics and Bacteriostatic Ability of Lactiplantibacillus plantarum SS-128 by Integration of Transcriptomics and Metabolomics. Foods 2022; 11:foods11050638. [PMID: 35267271 PMCID: PMC8909743 DOI: 10.3390/foods11050638] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/17/2022] [Accepted: 02/19/2022] [Indexed: 12/13/2022] Open
Abstract
Lactiplantibacillus plantarum could regulate certain physiological functions through the AI-2/LuxS-mediated quorum sensing (QS) system. To explore the regulation mechanism on the growth characteristics and bacteriostatic ability of L. plantarum SS-128, a luxS mutant was constructed by a two-step homologous recombination. Compared with ΔluxS/SS-128, the metabolites of SS-128 had stronger bacteriostatic ability. The combined analysis of transcriptomics and metabolomics data showed that SS-128 exhibited higher pyruvate metabolic efficiency and energy input, followed by higher LDH level and metabolite overflow compared to ΔluxS/SS-128, resulting in stronger bacteriostatic ability. The absence of luxS induces a regulatory pathway that burdens the cysteine cycle by quantitatively drawing off central metabolic intermediaries. To accommodate this mutations, ΔluxS/SS-128 exhibited lower metabolite overflow and abnormal proliferation. These results demonstrate that the growth characteristic and metabolism of L. plantarum SS-128 are mediated by the AI-2/LuxS QS system, which is a positive regulator involved in food safety. It would be helpful to investigate more bio-preservation control potential of L. plantarum, especially when applied in food industrial biotechnology.
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Affiliation(s)
| | | | | | | | | | - Zunying Liu
- Correspondence: ; Tel./Fax: +86-532-8203-2400
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Isolation, purification, identification, and discovery of the antibacterial mechanism of ld-phenyllactic acid produced by Lactiplantibacillus plantarum CXG9 isolated from a traditional Chinese fermented vegetable. Food Control 2022. [DOI: 10.1016/j.foodcont.2021.108490] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Preparation and characterization of semi-hydrophobic cryogels for culture of Lactobacillus strains and bioconversion towards phenyllactic acid bioproduction. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2021.108312] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Jiang YH, Yang LY, Xin WG, Zhang QL. Combined antibacterial and antibiofilm activity of phenyllactic acid and bacteriocin XJS01 against Shigella flexneri. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2021.101512] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Torrijos R, de Melo Nazareth T, Vila-Donat P, Mañes J, Meca G. Use of Mustard Extracts Fermented by Lactic Acid Bacteria to Mitigate the Production of Fumonisin B1 and B2 by Fusarium verticillioides in Corn Ears. Toxins (Basel) 2022; 14:toxins14020080. [PMID: 35202108 PMCID: PMC8880755 DOI: 10.3390/toxins14020080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/08/2022] [Accepted: 01/18/2022] [Indexed: 12/10/2022] Open
Abstract
Corn (Zea mays) is a worldwide crop subjected to infection by toxigenic fungi such as Fusarium verticillioides during the pre-harvest stage. Fusarium contamination can lead to the synthesis of highly toxic mycotoxins, such as Fumonisin B1 (FB1) and Fumonisin B2 (FB2), which compromises human and animal health. The work aimed to study the antifungal properties of fermented yellow and oriental mustard extracts using nine lactic acid bacteria (LAB) in vitro. Moreover, a chemical characterization of the main phenolic compounds and organic acids were carried out in the extracts. The results highlighted that the yellow mustard, fermented by Lactiplantibacillus plantarum strains, avoided the growth of Fusarium spp. in vitro, showing Minimum Inhibitory Concentration (MIC) and Minimum Fungicidal Concentration (MFC) values, ranging from 7.8 to 15.6 g/L and 15.6 to 31.3 g/L, respectively. Then, the lyophilized yellow mustard fermented extract by L. plantarum TR71 was applied through spray-on corn ears contaminated with F. verticillioides to study the antimycotoxigenic activity. After 14 days of incubation, the control contained 14.71 mg/kg of FB1, while the treatment reduced the content to 1.09 mg/kg (92.6% reduction). Moreover, no FB2 was observed in the treated samples. The chemical characterization showed that lactic acid, 3-phenyllactic acid, and benzoic acid were the antifungal metabolites quantified in higher concentrations in the yellow mustard fermented extract with L. plantarum TR71. The results obtained confirmed the potential application of fermented mustard extracts as a solution to reduce the incidence of mycotoxins in corn ears.
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Luo X, Wang Y, Zheng W, Sun X, Hu G, Yin L, Zhang Y, Yin F, Fu Y. Simultaneous improvement of the thermostability and activity of lactic dehydrogenase from Lactobacillus rossiae through rational design. RSC Adv 2022; 12:33251-33259. [PMID: 36425200 PMCID: PMC9677063 DOI: 10.1039/d2ra05599f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 11/08/2022] [Indexed: 11/22/2022] Open
Abstract
d-Phenyllactic acid, is a versatile organic acid with wide application prospects in the food, pharmaceutical and material industries. Wild-type lactate dehydrogenase LrLDH from Lactobacillus rossiae exhibits a high catalytic performance in the production of d-phenyllactic acid from phenylpyruvic acid or sodium phenylpyruvate, but its industrial application is hampered by poor thermostability. Here, computer aided rational design was applied to improve the thermostability of LrLDH. By using HotSpot Wizard 3.0, five hotspot residues (N218, L237, T247, D249 and S301) were identified, after which site-saturation mutagenesis and combined mutagenesis were performed. The double mutant D249A/T247I was screen out as the best variant, with optimum temperature, t1/2, and T1050 that were 12 °C, 17.96 min and 19 °C higher than that of wild-type LrLDH, respectively. At the same time, the kcat/Km of D249A/T247I was 1.47 s−1 mM−1, which was 3.4 times higher than that of the wild-type enzyme. Thus rational design was successfully applied to simultaneously improve the thermostability and catalytic activity of LrLDH to a significant extent. The results of molecular dynamics simulations and molecular structure analysis could explain the mechanisms for the improved performance of the double mutant. This study shows that computer-aided rational design can greatly improve the thermostability of d-lactate dehydrogenase, offering a reference for the modification of other enzymes. The d-LDH was engineered using computationally-assisted rational mutagenesis. The two mutants D249A and D249A/T247I showed significantly enhanced thermostability and catalytic activity to sodium phenylpyruvate compared with the wild-type enzyme.![]()
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Affiliation(s)
- Xi Luo
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
| | - Yifeng Wang
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, Jiangsu 210023, China
| | - Weilong Zheng
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
| | - Xiaolong Sun
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
| | - Gaowei Hu
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
| | - Longfei Yin
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
| | - Yingying Zhang
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
| | - Fengwei Yin
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
| | - Yongqian Fu
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
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Mishra B, Mishra AK, Kumar S, Mandal SK, NSV L, Kumar V, Baek KH, Mohanta YK. Antifungal Metabolites as Food Bio-Preservative: Innovation, Outlook, and Challenges. Metabolites 2021; 12:12. [PMID: 35050134 PMCID: PMC8778586 DOI: 10.3390/metabo12010012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 12/21/2021] [Accepted: 12/21/2021] [Indexed: 12/18/2022] Open
Abstract
Perishable food spoilage caused by fungi is a major cause of discomfort for food producers. Food sensory abnormalities range from aesthetic degeneration to significant aroma, color, or consistency alterations due to this spoilage. Bio-preservation is the use of natural or controlled bacteria or antimicrobials to enhance the quality and safety of food. It has the ability to harmonize and rationalize the required safety requirements with conventional preservation methods and food production safety and quality demands. Even though synthetic preservatives could fix such issues, there is indeed a significant social need for "clean label" foods. As a result, consumers are now seeking foods that are healthier, less processed, and safer. The implementation of antifungal compounds has gotten a lot of attention in recent decades. As a result, the identification and characterization of such antifungal agents has made promising advances. The present state of information on antifungal molecules, their modes of activity, connections with specific target fungi varieties, and uses in food production systems are summarized in this review.
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Affiliation(s)
- Bishwambhar Mishra
- Department of Biotechnology, Chaitanya Bharathi Institute of Technology, Hyderabad 500075, India; (B.M.); (S.K.M.); (L.N.)
| | - Awdhesh Kumar Mishra
- Department of Biotechnology, Yeungnam University, Gyeongsan 38541, Gyeongsangbuk-do, Korea; (A.K.M.); (V.K.)
| | - Sanjay Kumar
- Department of Biotechnology, National Institute of Technology, Tadepalligudem, Andhra Pradesh 534101, India;
| | - Sanjeeb Kumar Mandal
- Department of Biotechnology, Chaitanya Bharathi Institute of Technology, Hyderabad 500075, India; (B.M.); (S.K.M.); (L.N.)
| | - Lakshmayya NSV
- Department of Biotechnology, Chaitanya Bharathi Institute of Technology, Hyderabad 500075, India; (B.M.); (S.K.M.); (L.N.)
| | - Vijay Kumar
- Department of Biotechnology, Yeungnam University, Gyeongsan 38541, Gyeongsangbuk-do, Korea; (A.K.M.); (V.K.)
- Department of Orthopedics Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Kwang-Hyun Baek
- Department of Biotechnology, Yeungnam University, Gyeongsan 38541, Gyeongsangbuk-do, Korea; (A.K.M.); (V.K.)
| | - Yugal Kishore Mohanta
- Department of Applied Biology, University of Science and Technology Meghalaya, Ri-Bhoi 793101, India
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Qin Z, Wang D, Luo R, Li T, Xiong X, Chen P. Using Unnatural Protein Fusions to Engineer a Coenzyme Self-Sufficiency System for D-Phenyllactic Acid Biosynthesis in Escherichia coli. Front Bioeng Biotechnol 2021; 9:795885. [PMID: 34976983 PMCID: PMC8718758 DOI: 10.3389/fbioe.2021.795885] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 12/01/2021] [Indexed: 11/13/2022] Open
Abstract
The biosynthetic production of D-penyllactic acid (D-PLA) is often affected by insufficient supply and regeneration of cofactors, leading to high production cost, and difficulty in industrialization. In this study, a D-lactate dehydrogenase (D-LDH) and glycerol dehydrogenase (GlyDH) co-expression system was constructed to achieve coenzyme NADH self-sufficiency and sustainable production of D-PLA. Using glycerol and sodium phenylpyruvate (PPA) as co-substrate, the E. coli BL21 (DE3) harboring a plasmid to co-express LfD-LDH and BmGlyDH produced 3.95 g/L D-PLA with a yield of 0.78 g/g PPA, similar to previous studies. Then, flexible linkers were used to construct fusion proteins composing of D-LDH and GlyDH. Under the optimal conditions, 5.87 g/L D-PLA was produced by expressing LfD-LDH-l3-BmGlyDH with a yield of 0.97 g/g PPA, which was 59.3% increased compared to expression of LfD-LDH. In a scaled-up reaction, a productivity of 5.83 g/L/h was reached. In this study, improving the bio-catalytic efficiency by artificial redox self-equilibrium system with a bifunctional fusion protein could reduce the bio-production cost of D-PLA, making this bio-production of D-PLA a more promising industrial technology.
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Affiliation(s)
- Zhao Qin
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China
| | - Dan Wang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China
- *Correspondence: Dan Wang,
| | - Ruoshi Luo
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China
| | - Tinglan Li
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China
| | - Xiaochao Xiong
- Department of Biological Systems Engineering, Washington State University, Pullman, WA, United States
| | - Peng Chen
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China
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Li P, Lu Y, Zhao M, Chen L, Zhang C, Cheng Q, Chen C. Effects of Phenyllactic Acid, Lactic Acid Bacteria, and Their Mixture on Fermentation Characteristics and Microbial Community Composition of Timothy Silage. Front Microbiol 2021; 12:743433. [PMID: 34975781 PMCID: PMC8716789 DOI: 10.3389/fmicb.2021.743433] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 11/15/2021] [Indexed: 01/06/2023] Open
Abstract
This study investigated the effects of phenyllactic acid (PL), lactic acid bacteria (LAB), and their mixture on fermentation characteristics and microbial community composition of timothy silage. Timothy silages were treated without (CK) or with PL [10 mg/kg fresh matter (FM) basis], LAB inoculant (IN; a mixture of Lactobacillus plantarum and L.buchneri, 105 cfu/g FM), and their mixture (PI) and stored at ambient temperature (5°C∼15°C) in a dark room for 60 days. Compared with CK, all treated silages showed lower (P < 0.05) levels of butyric acid and ammonia-N. Treatment with PL enhanced (P < 0.05) the crude protein preservation of silage by favoring the growth of L. curvatus and Saccharomyces cerevisiae and inhibition of lactic acid-assimilating yeast belonging to Issatchenkia during ensiling. In particular, treatment with PL advanced (P < 0.05) the productions of lactic acid and volatile fatty acid in IN-treated silage. Therefore, PL used as a new additive exhibited potential for improving silage fermentation when it is combined with LAB IN during ensiling.
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Affiliation(s)
- Ping Li
- College of Animal Science, Guizhou University, Guiyang, China
- Sichuan Academy of Grassland Sciences, Chengdu, China
| | - Yongxiang Lu
- Sichuan Academy of Grassland Sciences, Chengdu, China
| | - Man Zhao
- Sichuan Academy of Grassland Sciences, Chengdu, China
| | - Liangyin Chen
- College of Animal Science, Guizhou University, Guiyang, China
| | | | - Qiming Cheng
- College of Animal Science, Guizhou University, Guiyang, China
| | - Chao Chen
- College of Animal Science, Guizhou University, Guiyang, China
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Azmal Ali S, Singh AK, Tomar SK, Behare P. Genome Sequence of Lacticaseibacillus rhamnosus Strain NCDC610, Isolated from a Traditional Cereal-Based Fermented Milk Product (Raabadi). Microbiol Resour Announc 2021; 10:e0067221. [PMID: 34761961 PMCID: PMC8582304 DOI: 10.1128/mra.00672-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 10/20/2021] [Indexed: 12/13/2022] Open
Abstract
We announce the draft genome sequence of Lacticaseibacillus rhamnosus NCDC610, an isolate from an Indian traditional cereal-based fermented milk product (Raabadi). The genome size of Lacticaseibacillus rhamnosus NCDC610 is 2.91 Mb with the assembled sequence, and the genome consists of 67 contigs.
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Affiliation(s)
- Syed Azmal Ali
- Proteomics and Cell Biology Laboratory, Animal Biotechnology Center, ICAR, National Dairy Research Institute, Karnal, Haryana, India
| | - Ashish Kumar Singh
- Dairy Technology Division, ICAR, National Dairy Research Institute, Karnal, Haryana, India
| | - Sudhir K. Tomar
- National Collection of Dairy Cultures Laboratory, Dairy Microbiology Division, ICAR, National Dairy Research Institute, Karnal, Haryana, India
| | - Pradip Behare
- National Collection of Dairy Cultures Laboratory, Dairy Microbiology Division, ICAR, National Dairy Research Institute, Karnal, Haryana, India
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Lee M, Song JH, Choi EJ, Yun YR, Lee KW, Chang JY. UPLC-QTOF-MS/MS and GC-MS Characterization of Phytochemicals in Vegetable Juice Fermented Using Lactic Acid Bacteria from Kimchi and Their Antioxidant Potential. Antioxidants (Basel) 2021; 10:antiox10111761. [PMID: 34829632 PMCID: PMC8614894 DOI: 10.3390/antiox10111761] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 10/30/2021] [Accepted: 11/01/2021] [Indexed: 12/22/2022] Open
Abstract
This study aims to investigate fermentative metabolites in probiotic vegetable juice from four crop varieties (Brassica oleracea var. capitata, B. oleracea var. italica, Daucus carota L., and Beta vulgaris) and their antioxidant properties. Vegetable juice was inoculated with two lactic acid bacteria (LAB) (Companilactobacillus allii WiKim39 and Lactococcus lactis WiKim0124) isolated from kimchi and their properties were evaluated using untargeted UPLC-QTOF-MS/MS and GC-MS. The samples were also evaluated for radical (DPPH• and OH•) scavenging activities, lipid peroxidation, and ferric-reducing antioxidant power. The fermented vegetable juices exhibited high antioxidant activities and increased amounts of total phenolic compounds. Fifteen compounds and thirty-two volatiles were identified using UPLC-QTOF-MS/MS and GC-MS, respectively. LAB fermentation significantly increased the contents of d-leucic acid, indole-3-lactic acid, 3-phenyllactic acid, pyroglutamic acid, γ-aminobutyric acid, and gluconic acid. These six metabolites showed a positive correlation with antioxidant properties. Thus, vegetable juices fermented with WiKim39 and WiKim0124 can be considered as novel bioactive health-promoting sources.
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Affiliation(s)
- Moeun Lee
- Research and Development Division, World Institute of Kimchi, Gwangju 61755, Korea; (M.L.); (J.H.S.); (E.J.C.); (Y.-R.Y.)
- Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Korea
| | - Jung Hee Song
- Research and Development Division, World Institute of Kimchi, Gwangju 61755, Korea; (M.L.); (J.H.S.); (E.J.C.); (Y.-R.Y.)
| | - Eun Ji Choi
- Research and Development Division, World Institute of Kimchi, Gwangju 61755, Korea; (M.L.); (J.H.S.); (E.J.C.); (Y.-R.Y.)
| | - Ye-Rang Yun
- Research and Development Division, World Institute of Kimchi, Gwangju 61755, Korea; (M.L.); (J.H.S.); (E.J.C.); (Y.-R.Y.)
| | - Ki Won Lee
- Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Korea
- Advanced Institutes of Convergence Technology, Seoul National University, Suwon 16229, Korea
- Correspondence: (K.W.L.); (J.Y.C.)
| | - Ji Yoon Chang
- Research and Development Division, World Institute of Kimchi, Gwangju 61755, Korea; (M.L.); (J.H.S.); (E.J.C.); (Y.-R.Y.)
- Correspondence: (K.W.L.); (J.Y.C.)
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