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Ruiz de la Bastida A, Langa S, Curiel JA, Peirotén Á, Landete JM. Effect of Fermented Soy Beverage on Equol Production by Fecal Microbiota. Foods 2024; 13:2758. [PMID: 39272523 PMCID: PMC11394804 DOI: 10.3390/foods13172758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2024] [Revised: 08/22/2024] [Accepted: 08/29/2024] [Indexed: 09/15/2024] Open
Abstract
Soy consumption is associated with health benefits, mainly linked to the ability of the intestinal microbiota to metabolize the glycosylated isoflavones into more bioactive compounds, such as equol. Because Bifidobacterium pseudocatenulatum INIA P815 is able to efficiently deglycosylate daidzin into daidzein, the aim of this work was to confirm the influence of soy beverages fermented by B. pseudocatenulatum INIA P815 for enhancing equol production by fecal microbiota. Firstly, fecal samples from 17 participants were characterized in vitro, and we observed that 35.3% of them were able to produce equol from daidzein. In addition, the kinetics of equol production and degradation by fecal microbiota were evaluated, determining that 30-85% of equol is degraded after 24 h of incubation. Finally, the influence of fermented soy beverage on improving the production of equol by selected equol-producing fecal samples and by the equol-producing strain Slackia isoflavoniconvertens was analyzed through a colonic model. Fermented soy beverage enhanced the equol production from S. isoflavoniconvertens as well as the fecal samples whose microbiota showed high rates of equol degradation. The results obtained confirm that the fermentation of soy beverages with selected bacterial strains improves the functional properties of these beverages in terms of isoflavone metabolism and equol production.
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Affiliation(s)
- Ana Ruiz de la Bastida
- Departamento de Tecnología de Alimentos, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA-CSIC), Carretera de La Coruña Km 7.5, 28040 Madrid, Spain
| | - Susana Langa
- Departamento de Tecnología de Alimentos, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA-CSIC), Carretera de La Coruña Km 7.5, 28040 Madrid, Spain
| | - José Antonio Curiel
- Departamento de Tecnología de Alimentos, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA-CSIC), Carretera de La Coruña Km 7.5, 28040 Madrid, Spain
| | - Ángela Peirotén
- Departamento de Tecnología de Alimentos, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA-CSIC), Carretera de La Coruña Km 7.5, 28040 Madrid, Spain
| | - José María Landete
- Departamento de Tecnología de Alimentos, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA-CSIC), Carretera de La Coruña Km 7.5, 28040 Madrid, Spain
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2
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Vivekanandan KE, Kasimani R, Kumar PV, Meenatchisundaram S, Sundar WA. Overview of cloning in lactic acid bacteria: Expression and its application of probiotic potential in inflammatory bowel diseases. Biotechnol Appl Biochem 2024; 71:881-895. [PMID: 38576028 DOI: 10.1002/bab.2584] [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: 10/18/2023] [Accepted: 03/22/2024] [Indexed: 04/06/2024]
Abstract
Inflammatory bowel disease (IBD) imposes a significant impact on the quality of life for affected individuals. However, there was a current lack of a systematic summary regarding the latest epidemic trends and the underlying pathogenesis of IBD. This highlights the need for a thorough examination of both the epidemiological aspects of IBD and the specific mechanisms by which lactic acid bacteria (LAB) contribute to mitigating this condition. In developed countries, higher incidences and death rates of IBD have been observed, influenced by a combination of environmental and genetic factors. LAB offer significant advantages and substantial potential for enhancing IBD treatment. LAB's capabilities include the production of bioactive metabolites, regulation of gut immunity, protection of intestinal mechanical barriers, inhibition of oxidative damage, and restoration of imbalanced gut microbiota. The review suggests that screening effective LAB using cell models and metabolites, optimizing LAB intake through dose-effect studies, enhancing utilization through nanoencapsulation and microencapsulation, investigating mechanisms to deepen the understanding of LAB, and refining clinical study designs. These efforts aim to contribute to comprehending the epidemic trend, pathogenesis, and treatment of IBD, ultimately fostering the development of targeted therapeutic products, such as LAB-based interventions.
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Affiliation(s)
- K E Vivekanandan
- Department of Microbiology, Nehru Arts and Science College, Coimbatore, Tamil Nadu, India
| | - R Kasimani
- Department of Microbiology, Nehru Arts and Science College, Coimbatore, Tamil Nadu, India
| | - P Vinoth Kumar
- Department of Microbiology, Nehru Arts and Science College, Coimbatore, Tamil Nadu, India
| | - S Meenatchisundaram
- Department of Microbiology, Shree Nehru Maha Vidyalaya College of Arts and Science, Coimbatore, Tamil Nadu, India
| | - William Arputha Sundar
- Department of Pharmaceuticals, Swamy Vivekananda College of Pharmacy, Namakkal, Tamil Nadu, India
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Gong Y, Lv J, Pang X, Zhang S, Zhang G, Liu L, Wang Y, Li C. Advances in the Metabolic Mechanism and Functional Characteristics of Equol. Foods 2023; 12:2334. [PMID: 37372545 DOI: 10.3390/foods12122334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/07/2023] [Accepted: 06/08/2023] [Indexed: 06/29/2023] Open
Abstract
Equol is the most potent soy isoflavone metabolite and is produced by specific intestinal microorganisms of mammals. It has promising application possibilities for preventing chronic diseases such as cardiovascular disease, breast cancer, and prostate cancer due to its high antioxidant activity and hormone-like activity. Thus, it is of great significance to systematically study the efficient preparation method of equol and its functional activity. This paper elaborates on the metabolic mechanism of equol in humans; focuses on the biological characteristics, synthesis methods, and the currently isolated equol-producing bacteria; and looks forward to its future development and application direction, aiming to provide guidance for the application and promotion of equol in the field of food and health products.
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Affiliation(s)
- Yining Gong
- Key Laboratory of Dairy Sciences, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin 150030, China
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China
| | - Jiaping Lv
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China
| | - Xiaoyang Pang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China
| | - Shuwen Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China
| | - Guofang Zhang
- Key Laboratory of Dairy Sciences, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Libo Liu
- Key Laboratory of Dairy Sciences, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Yunna Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China
| | - Chun Li
- Key Laboratory of Dairy Sciences, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin 150030, China
- Heilongjiang Green Food Science Research Institute, Harbin 150030, China
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Langa S, Peirotén Á, Curiel JA, de la Bastida AR, Landete JM. Isoflavone Metabolism by Lactic Acid Bacteria and Its Application in the Development of Fermented Soy Food with Beneficial Effects on Human Health. Foods 2023; 12:1293. [PMID: 36981219 PMCID: PMC10048179 DOI: 10.3390/foods12061293] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/08/2023] [Accepted: 03/16/2023] [Indexed: 03/22/2023] Open
Abstract
Isoflavones are phenolic compounds (considered as phytoestrogens) with estrogenic and antioxidant function, which are highly beneficial for human health, especially in the aged population. However, isoflavones in foods are not bioavailable and, therefore, have low biological activity. Additionally, their transformation into bioactive compounds by microorganisms is necessary to obtain bioavailable isoflavones with beneficial effects on human health. Many lactic acid bacteria (LAB) can transform the methylated and glycosylated forms of isoflavones naturally present in foods into more bioavailable aglycones, such as daidzein, genistein and glycitein. In addition, certain LAB strains are capable of transforming isoflavone aglycones into compounds with a greater biological activity, such as dihydrodaidzein (DHD), O-desmethylangolensin (O-DMA), dihydrogenistein (DHG) and 6-hydroxy-O-desmethylangolensin (6-OH-O-DMA). Moreover, Lactococcus garviae 20-92 is able to produce equol. Another strategy in the bioconversion of isoflavones is the heterologous expression of genes from Slackia isoflavoniconvertens DSM22006, which have allowed the production of DHD, DHG, equol and 5-hydroxy-equol in high concentrations by engineered LAB strains. Accordingly, the consequences of isoflavone metabolism by LAB and its application in the development of foods enriched in bioactive isoflavones, as well as health benefits attributed to their consumption, will be addressed in this work.
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Affiliation(s)
| | | | | | | | - José María Landete
- Departamento de Tecnología de Alimentos, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA-CSIC), Carretera de La Coruña Km 7.5, 28040 Madrid, Spain
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5
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Wang X, Chen B, Fang X, Zhong Q, Liao Z, Wang J, Wu X, Ma Y, Li P, Feng X, Wang L. Soy isoflavone-specific biotransformation product S-equol in the colon: physiological functions, transformation mechanisms, and metabolic regulatory pathways. Crit Rev Food Sci Nutr 2022; 64:5462-5490. [PMID: 36503364 DOI: 10.1080/10408398.2022.2154744] [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: 12/14/2022]
Abstract
Epidemiological data suggest that regular intake of soy isoflavones may reduce the incidence of estrogen-dependent and aging-associated disorders. Equol is a metabolite of soy isoflavone (SI) produced by specific gut microbiota and has many beneficial effects on human health due to its higher biological activity compared to SI. However, only 1/3 to 1/2 of humans are able to produce equol in the body, which means that not many people can fully benefit from SI. This review summarizes the recent advances in equol research, focusing on the chemical properties, physiological functions, conversion mechanisms in vitro and vivo, and metabolic regulatory pathways affecting S-equol production. Advanced experimental designs and possible techniques in future research plan are also fully discussed. Furthermore, this review provides a fundamental basis for researchers in the field to understand individual differences in S-equol production, the efficiency of metabolic conversion of S-equol, and fermentation production of S-equol in vitro.
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Affiliation(s)
- Xiaoying Wang
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Baiyan Chen
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Xiang Fang
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Qingping Zhong
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Zhenlin Liao
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Jie Wang
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Xuejiao Wu
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Yuhao Ma
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Pengzhen Li
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Xiaoxuan Feng
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Li Wang
- College of Food Science, South China Agricultural University, Guangzhou, China
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Guo X, Zang X, Dou SJ, Wang DY, Wang XL. Fermentation of soymilk by Lactobacillus acidipiscis isolated from Chinese stinky tofu capable of efficiently biotransforming isoflavone glucosides to dihydrodaidzein and dihydrogenistein. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:7221-7230. [PMID: 35730767 DOI: 10.1002/jsfa.12087] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 06/19/2022] [Accepted: 06/22/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND The soy isoflavone microbial metabolites dihydrodaidzein (DHD), dihydrogenistein (DHG), equol and 5-hydroxy-equol are generally more biologically active than their precursors daidzein and genistein. Bacteria responsible for isoflavone metabolism have been isolated and identified. Fermented soymilk is a potential functional food; however, there are few lactic acid bacteria capable of metabolizing soy isoflavones. RESULTS A newly isolated Gram-positive facultative anaerobic bacterium, which was named Lactobacillus acidipiscis HAU-FR7, was isolated from the traditional Chinese fermented soy product 'stinky tofu'. Bacterium strain HAU-FR7 can grow under aerobic conditions and can also convert most of the daidzin and genistin in soymilk into DHD and DHG, respectively. The concentrations of DHD and DHG produced were 183 and 134 μmol L-1 , respectively, after fermentation for 24 h. Strain HAU-FR7 does not produce the biogenic amines cadaverine, putrescine, histamine or tyramine, and an antibiotic susceptibility test showed that HAU-FR7 is sensitive to nine of the ten tested antibiotics, except for vancomycin. Moreover, the 1,1-diphenyl-2- picrylhydrazyl free radical scavenging capacity of soymilk fermented with HAU-FR7 was significantly higher than that of unfermented soymilk. CONCLUSION A facultative anaerobic lactic acid bacterium, designated Lactobacillus acidipiscis HAU-FR7, is capable of reducing the soy isoflavone glucosides daidzin and genistin in soymilk to DHD and DHG efficiently, even in the presence of atmospheric oxygen. The biotransformation activity of HAU-FR7 grown in soymilk is higher than that in de Man-Rogosa-Sharpe liquid culture medium. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Xia Guo
- College of Life Sciences, Hebei Agricultural University, Baoding, China
| | - Xuan Zang
- College of Life Sciences, Hebei Agricultural University, Baoding, China
| | - Shi-Juan Dou
- College of Life Sciences, Hebei Agricultural University, Baoding, China
| | - Dong-Yun Wang
- College of Life Sciences, Hebei Agricultural University, Baoding, China
| | - Xiu-Ling Wang
- College of Life Sciences, Hebei Agricultural University, Baoding, China
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Langa S, Peirotén Á, Curiel JA, Arqués JL, Landete JM. Promoters for the expression of food-grade selectable markers in lactic acid bacteria and bifidobacteria. Appl Microbiol Biotechnol 2022; 106:7845-7856. [DOI: 10.1007/s00253-022-12237-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 10/04/2022] [Accepted: 10/07/2022] [Indexed: 11/24/2022]
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8
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Development of the first fermented soy beverages enriched in equol and 5-hydroxy-equol. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Liu H, Wang Y, Zhu D, Xu J, Xu X, Liu J. Bioaccessibility and Application of Soybean Isoflavones: A Review. FOOD REVIEWS INTERNATIONAL 2022. [DOI: 10.1080/87559129.2022.2103824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- He Liu
- College of Food Science and Technology, Bohai University, Jinszhou, Liaoning, China
| | - Yue Wang
- College of Food Science and Technology, Bohai University, Jinszhou, Liaoning, China
| | - Danshi Zhu
- College of Food Science and Technology, Bohai University, Jinszhou, Liaoning, China
| | - Jiaxin Xu
- College of Food Science and Technology, Bohai University, Jinszhou, Liaoning, China
| | - Xinyue Xu
- College of Food Science and Technology, Bohai University, Jinszhou, Liaoning, China
| | - Jun Liu
- Shandong Yuwang Ecological Food Industry Co. Ltd, Yucheng, Shandong, China
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Landete JM. Development of soy beverages enriched in O-desmethylangolesin and 6-hydroxy-O-desmethylangolesin by engineered lactic acid bacteria. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Evoglow-Pp1 and mCherry proteins: a dual fluorescent labeling system for lactic acid bacteria. Appl Microbiol Biotechnol 2021; 105:7367-7378. [PMID: 34536099 DOI: 10.1007/s00253-021-11537-y] [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: 05/07/2021] [Revised: 07/30/2021] [Accepted: 08/19/2021] [Indexed: 10/20/2022]
Abstract
Fluorescent proteins are widely used for cell and protein tracking. Most of these proteins show a high signal and need the presence of oxygen to emit fluorescence. Among them, the fluorescent protein mCherry stands up because of its bright signal and fast maturation. Furthermore, the anaerobic cyan-green fluorescent protein Evoglow-Pp1 allows fluorescent detection under anaerobic conditions. In this work, we modified the pNZ:TuR.aFP plasmid, which harbors the gene encoding Evoglow-Pp1 and the promoter of elongation factor Tu from Limosilactobacillus reuteri CECT925, to obtain a plasmid containing the mrfp gene encoding the monomeric mCherry (pNZ:TuR.mCherry). Moreover, both genes were cloned together (pNZ:TuR.aFP.mCherry) developing a chimeric protein; and with a stop codon between them (pNZ:TuR.aFP.STOP.mCherry) resulting in the expression of both Evoglow-Pp1 and mCherry proteins separately under the influence of the same promoter. Lactococcus lactis, Lacticaseibacillus casei, Lactiplantibacillus plantarum, Limosilactobacillus fermentum, Lacticaseibacillus rhamnosus, and L. reuteri strains were transformed with the previously mentioned plasmids, showing an excellent red (pNZ:TuR.mCherry), green (pNZ:TuR.aFP), and red combined with green (pNZ:TuR.aFP.mCherry and pNZ:TuR.aFP.STOP.mCherry) fluorescence signal. Both fluorescence emissions were stable in strains transformed with pNZ:TuR.aFP.STOP.mCherry, while differences in the red or green fluorescence emission were observed in some of the strains harboring pNZ:TuR.aFP.mCherry. Moreover, these plasmids allowed strains differentiation in a complex environment, such as fecal microbiota. Hence, we present the plasmid pNZ:TuR.aFP.STOP.mCherry as a useful tool for the labeling of lactobacilli strains, which would be functional under anoxic conditions, thanks to Evoglow-Pp1, while having the high brightness and good photostability of mCherry. KEY POINTS: • LAB transformed with pNZ:TuR.mCherry expressed the red fluorescent protein mCherry. • LAB transformed with pNZ:TuR.aFP.mCherry developed a fusion of both proteins Evoglow-Pp1 and mCherry. • LAB with pNZ:TuR.aFP.STOP.mCherry expressed both fluorescent proteins separately.
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Ruiz de la Bastida A, Peirotén Á, Langa S, Arqués JL, Landete JM. Heterologous production of equol by lactic acid bacteria strains in culture medium and food. Int J Food Microbiol 2021; 360:109328. [PMID: 34281716 DOI: 10.1016/j.ijfoodmicro.2021.109328] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 06/30/2021] [Accepted: 07/05/2021] [Indexed: 11/16/2022]
Abstract
The isoflavones daidzin and genistin, present in soybeans, can be transformed by the intestinal microbiota into equol and 5-hydroxy-equol, compounds with enhanced availability and bioactivity, although these are only produced by a fraction of the population. Hence, there is an interest in the production of these compounds, although, to date, few bacteria with biotechnological interest and applicability in food have been found able to produce equol. In order to obtain lactic acid bacteria able to produce equol, the daidzein reductase (dzr), dihydrodaidzein reductase (ddr), tetrahydrodaidzein reductase (tdr) and dihydrodaidzein racemase (ifcA) genes, from Slackia isoflavoniconvertens DSM22006, were cloned into the vector pNZ:TuR, under a strong constitutive promoter (TuR). Lactococcus lactis MG1363, Lacticaseibacillus casei BL23, Lactiplantibacillus plantarum WCFS1, Limosilactobacillus fermentum INIA 584L and L. fermentum INIA 832L, harbouring pNZ:TuR.tdr.ddr, were able to produce equol from dihydrodaidzein, while L. fermentum strains showed also production of 5-hydroxy-equol from dihydrogenistein. The metabolization of daidzein and genistein by the combination of strains harbouring pNZ:TuR.dzr and pNZ:TuR.tdr.ddr showed similar results, and the addition of the correspondent strain harbouring pNZ:TuR.ifcA resulted in an increase of equol production, but only in the L. fermentum strains. This pattern of equol and 5-hydroxy-equol production by L. fermentum strains was also confirmed in cow's milk supplemented with daidzein and genistein and incubated with the different combination of strains harbouring the constructed plasmids. Bacteria generally recognized as safe (GRAS), such as the lactic acid bacteria species used in this work, harbouring these plasmids, would be of value for the development of fermented vegetal foods enriched in equol and 5-hydroxy-equol.
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Affiliation(s)
- Ana Ruiz de la Bastida
- Departamento de Tecnología de Alimentos, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Carretera de La Coruña Km 7.5, 28040 Madrid, Spain
| | - Ángela Peirotén
- Departamento de Tecnología de Alimentos, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Carretera de La Coruña Km 7.5, 28040 Madrid, Spain
| | - Susana Langa
- Departamento de Tecnología de Alimentos, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Carretera de La Coruña Km 7.5, 28040 Madrid, Spain
| | - Juan Luis Arqués
- Departamento de Tecnología de Alimentos, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Carretera de La Coruña Km 7.5, 28040 Madrid, Spain
| | - José María Landete
- Departamento de Tecnología de Alimentos, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Carretera de La Coruña Km 7.5, 28040 Madrid, Spain.
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Vázquez L, Flórez AB, Rodríguez J, Mayo B. Heterologous expression of equol biosynthesis genes from Adlercreutzia equolifaciens. FEMS Microbiol Lett 2021; 368:6309895. [PMID: 34173644 PMCID: PMC8266531 DOI: 10.1093/femsle/fnab082] [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: 04/08/2021] [Accepted: 06/29/2021] [Indexed: 12/23/2022] Open
Abstract
Equol is the isoflavone-derived metabolite with the greatest estrogenic and antioxidant activity. It is produced from daidzein by fastidious and oxygen-susceptible intestinal bacteria, which hinders their use at an industrial scale. Therefore, expressing the equol production machinery into easily-cultivable hosts would expedite the heterologous production of this compound. In this work, four genes (racemase, tdr, ddr and dzr) coding for key enzymes involved in equol production in Adlercreutzia equolifaciens DSM19450T were synthesized and cloned in a pUC-derived vector (pUC57-equol) that was introduced in Escherichia coli. Recombinant clones of E. coli produced equol in cultures supplemented with daidzein (equol precursor) and dihydrodaidzein (intermediate compound). To check whether equol genes were expressed in Gram-positive bacteria, the pUC57-equol construct was cloned into the low-copy-number vector pIL252, and the new construct (pIL252-pUC57-equol) introduced into model strains of Lacticaseibacillus casei and Lactococcus lactis. L. casei clones carrying pIL252-pUC57-equol produced a small amount of equol from dihydrodaidzein but not from daidzein, while L. lactis recombinant clones produced no equol from either of the substrates. This is the first time that A. equolifaciens equol genes have been cloned and expressed in heterologous hosts. E. coli clones harboring pUC57-equol could be used for biotechnological production of equol.
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Affiliation(s)
- Lucía Vázquez
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA), Consejo Superior de Investigaciones Científicas (CSIC), Paseo Río Linares s/n, 33300-Villaviciosa, Spain.,Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Avenida de Roma s/n, 33011-Oviedo, Spain
| | - Ana Belén Flórez
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA), Consejo Superior de Investigaciones Científicas (CSIC), Paseo Río Linares s/n, 33300-Villaviciosa, Spain.,Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Avenida de Roma s/n, 33011-Oviedo, Spain
| | - Javier Rodríguez
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA), Consejo Superior de Investigaciones Científicas (CSIC), Paseo Río Linares s/n, 33300-Villaviciosa, Spain.,Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Avenida de Roma s/n, 33011-Oviedo, Spain
| | - Baltasar Mayo
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA), Consejo Superior de Investigaciones Científicas (CSIC), Paseo Río Linares s/n, 33300-Villaviciosa, Spain.,Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Avenida de Roma s/n, 33011-Oviedo, Spain
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