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Lécuyer E, Le Roy T, Gestin A, Lacombe A, Philippe C, Ponnaiah M, Huré JB, Fradet M, Ichou F, Boudebbouze S, Huby T, Gautier E, Rhimi M, Maguin E, Kapel N, Gérard P, Venteclef N, Garlatti M, Chassaing B, Lesnik P. Tolerogenic Dendritic Cells Shape a Transmissible Gut Microbiota That Protects From Metabolic Diseases. Diabetes 2021; 70:2067-2080. [PMID: 34078628 PMCID: PMC8576430 DOI: 10.2337/db20-1177] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 05/26/2021] [Indexed: 11/13/2022]
Abstract
Excess chronic contact between microbial motifs and intestinal immune cells is known to trigger a low-grade inflammation involved in many pathologies such as obesity and diabetes. The important skewing of intestinal adaptive immunity in the context of diet-induced obesity (DIO) is well described, but how dendritic cells (DCs) participate in these changes is still poorly documented. To address this question, we challenged transgenic mice with enhanced DC life span and immunogenicity (DChBcl-2 mice) with a high-fat diet. Those mice display resistance to DIO and metabolic alterations. The DIO-resistant phenotype is associated with healthier parameters of intestinal barrier function and lower intestinal inflammation. DChBcl-2 DIO-resistant mice demonstrate a particular increase in tolerogenic DC numbers and function, which is associated with strong intestinal IgA, T helper 17, and regulatory T-cell immune responses. Microbiota composition and function analyses reveal that the DChBcl-2 mice microbiota is characterized by lower immunogenicity and an enhanced butyrate production. Cohousing experiments and fecal microbial transplantations are sufficient to transfer the DIO resistance status to wild-type mice, demonstrating that maintenance of DCs' tolerogenic ability sustains a microbiota able to drive DIO resistance. The tolerogenic function of DCs is revealed as a new potent target in metabolic disease management.
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Affiliation(s)
- Emelyne Lécuyer
- INSERM, UMRS 1166 Institute of Cardiometabolism and Nutrition, Sorbonne Université, Paris, France
| | - Tiphaine Le Roy
- INSERM, UMRS 1166 Institute of Cardiometabolism and Nutrition, Sorbonne Université, Paris, France
- Institute of Cardiometabolism and Nutrition, Hôpital Pitié-Salpêtrière, Paris, France
- Sorbonne/INSERM, Nutrition et obésités: approches systémiques (nutriOmics), Hôpital Pitié- Salpêtrière, Paris, France
| | - Aurélie Gestin
- INSERM, UMRS 1166 Institute of Cardiometabolism and Nutrition, Sorbonne Université, Paris, France
- Institute of Cardiometabolism and Nutrition, Hôpital Pitié-Salpêtrière, Paris, France
| | - Amélie Lacombe
- Institute of Cardiometabolism and Nutrition, Hôpital Pitié-Salpêtrière, Paris, France
| | - Catherine Philippe
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Maharajah Ponnaiah
- Institute of Cardiometabolism and Nutrition, Hôpital Pitié-Salpêtrière, Paris, France
| | - Jean-Baptiste Huré
- INSERM, UMRS 1166 Institute of Cardiometabolism and Nutrition, Sorbonne Université, Paris, France
| | - Magali Fradet
- Institute of Cardiometabolism and Nutrition, Hôpital Pitié-Salpêtrière, Paris, France
| | - Farid Ichou
- Institute of Cardiometabolism and Nutrition, Hôpital Pitié-Salpêtrière, Paris, France
| | - Samira Boudebbouze
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Thierry Huby
- INSERM, UMRS 1166 Institute of Cardiometabolism and Nutrition, Sorbonne Université, Paris, France
- Institute of Cardiometabolism and Nutrition, Hôpital Pitié-Salpêtrière, Paris, France
| | - Emmanuel Gautier
- INSERM, UMRS 1166 Institute of Cardiometabolism and Nutrition, Sorbonne Université, Paris, France
- Institute of Cardiometabolism and Nutrition, Hôpital Pitié-Salpêtrière, Paris, France
| | - Moez Rhimi
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Emmanuelle Maguin
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Nathalie Kapel
- Laboratoire de Coprologie Fonctionnelle, Hôpital Pitié-Salpêtrière, Paris, France
- INSERM UMRS 1139, Université de Paris, Paris, France
| | - Philippe Gérard
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Nicolas Venteclef
- INSERM, Cordeliers Research Centre, Immunity and Metabolism of Diabetes (IMMEDIAB), Université de Paris, Paris, France
| | - Michèle Garlatti
- INSERM, UMRS 1166 Institute of Cardiometabolism and Nutrition, Sorbonne Université, Paris, France
| | - Benoit Chassaing
- Neuroscience Institute and Institute for Biomedical Sciences, Georgia State University, Atlanta, GA
- INSERM, U1016, Team "Mucosal microbiota in chronic inflammatory diseases," Paris, France
| | - Philippe Lesnik
- INSERM, UMRS 1166 Institute of Cardiometabolism and Nutrition, Sorbonne Université, Paris, France
- Institute of Cardiometabolism and Nutrition, Hôpital Pitié-Salpêtrière, Paris, France
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Cuffaro B, Assohoun ALW, Boutillier D, Súkeníková L, Desramaut J, Boudebbouze S, Salomé-Desnoulez S, Hrdý J, Waligora-Dupriet AJ, Maguin E, Grangette C. In Vitro Characterization of Gut Microbiota-Derived Commensal Strains: Selection of Parabacteroides distasonis Strains Alleviating TNBS-Induced Colitis in Mice. Cells 2020; 9:cells9092104. [PMID: 32947881 PMCID: PMC7565435 DOI: 10.3390/cells9092104] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 07/15/2020] [Accepted: 07/20/2020] [Indexed: 12/17/2022] Open
Abstract
Alterations in the gut microbiota composition and diversity seem to play a role in the development of chronic diseases, including inflammatory bowel disease (IBD), leading to gut barrier disruption and induction of proinflammatory immune responses. This opens the door for the use of novel health-promoting bacteria. We selected five Parabacteroides distasonis strains isolated from human adult and neonates gut microbiota. We evaluated in vitro their immunomodulation capacities and their ability to reinforce the gut barrier and characterized in vivo their protective effects in an acute murine model of colitis. The in vitro beneficial activities were highly strain dependent: two strains exhibited a potent anti-inflammatory potential and restored the gut barrier while a third strain reinstated the epithelial barrier. While their survival to in vitro gastric conditions was variable, the levels of P. distasonis DNA were higher in the stools of bacteria-treated animals. The strains that were positively scored in vitro displayed a strong ability to rescue mice from colitis. We further showed that two strains primed dendritic cells to induce regulatory T lymphocytes from naïve CD4+ T cells. This study provides better insights on the functionality of commensal bacteria and crucial clues to design live biotherapeutics able to target inflammatory chronic diseases such as IBD.
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Affiliation(s)
- Bernardo Cuffaro
- Université de Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d’Infection et d’Immunité de Lille, 59000 Lille, France; (B.C.); (D.B.); (J.D.)
- Institut Micalis, MIHA Team, Université Paris-Saclay, INRAE, AgroParisTech, 78350 Jouy-en-Josas, France; (A.L.W.A.); (S.B.)
| | - Aka L. W. Assohoun
- Institut Micalis, MIHA Team, Université Paris-Saclay, INRAE, AgroParisTech, 78350 Jouy-en-Josas, France; (A.L.W.A.); (S.B.)
- Laboratoire de Biotechnologie et Microbiologie des Aliments, UFR en Sciences et Technologies des Aliments, Université Nangui Abrogoua, Abidjan 00225, Côte d’Ivoire
| | - Denise Boutillier
- Université de Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d’Infection et d’Immunité de Lille, 59000 Lille, France; (B.C.); (D.B.); (J.D.)
| | - Lenka Súkeníková
- Institute of Immunology and Microbiology, First Faculty of Medicine, Charles University and General University Hospital, 121 08 Prague, Czech Republic; (L.S.); (J.H.)
| | - Jérémy Desramaut
- Université de Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d’Infection et d’Immunité de Lille, 59000 Lille, France; (B.C.); (D.B.); (J.D.)
| | - Samira Boudebbouze
- Institut Micalis, MIHA Team, Université Paris-Saclay, INRAE, AgroParisTech, 78350 Jouy-en-Josas, France; (A.L.W.A.); (S.B.)
| | - Sophie Salomé-Desnoulez
- Université de Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, US 41-UMS 2014-PLBS, 59000 Lille, France;
| | - Jiří Hrdý
- Institute of Immunology and Microbiology, First Faculty of Medicine, Charles University and General University Hospital, 121 08 Prague, Czech Republic; (L.S.); (J.H.)
| | | | - Emmanuelle Maguin
- Institut Micalis, MIHA Team, Université Paris-Saclay, INRAE, AgroParisTech, 78350 Jouy-en-Josas, France; (A.L.W.A.); (S.B.)
- Correspondence: (E.M.); (C.G.); Tel.: +33-681-151-925 (E.M.); +33-320-877-392 (C.G.)
| | - Corinne Grangette
- Université de Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Centre d’Infection et d’Immunité de Lille, 59000 Lille, France; (B.C.); (D.B.); (J.D.)
- Correspondence: (E.M.); (C.G.); Tel.: +33-681-151-925 (E.M.); +33-320-877-392 (C.G.)
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Le Roy T, Lécuyer E, Chassaing B, Rhimi M, Lhomme M, Boudebbouze S, Ichou F, Haro Barceló J, Huby T, Guerin M, Giral P, Maguin E, Kapel N, Gérard P, Clément K, Lesnik P. The intestinal microbiota regulates host cholesterol homeostasis. BMC Biol 2019; 17:94. [PMID: 31775890 PMCID: PMC6882370 DOI: 10.1186/s12915-019-0715-8] [Citation(s) in RCA: 107] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 10/25/2019] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Management of blood cholesterol is a major focus of efforts to prevent cardiovascular diseases. The objective of this study was to investigate how the gut microbiota affects host cholesterol homeostasis at the organism scale. RESULTS We depleted the intestinal microbiota of hypercholesterolemic female Apoe-/- mice using broad-spectrum antibiotics. Measurement of plasma cholesterol levels as well as cholesterol synthesis and fluxes by complementary approaches showed that the intestinal microbiota strongly regulates plasma cholesterol level, hepatic cholesterol synthesis, and enterohepatic circulation. Moreover, transplant of the microbiota from humans harboring elevated plasma cholesterol levels to recipient mice induced a phenotype of high plasma cholesterol levels in association with a low hepatic cholesterol synthesis and high intestinal absorption pattern. Recipient mice phenotypes correlated with several specific bacterial phylotypes affiliated to Betaproteobacteria, Alistipes, Bacteroides, and Barnesiella taxa. CONCLUSIONS These results indicate that the intestinal microbiota determines the circulating cholesterol level and may thus represent a novel therapeutic target in the management of dyslipidemia and cardiovascular diseases.
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Affiliation(s)
- Tiphaine Le Roy
- INSERM, UMRS 1166, team "Integrative Biology of Atherosclerosis", Sorbonne Universités, Hôpital Pitié-Salpêtrière, Paris, France.,Institute of Cardiometabolism and Nutrition (ICAN), Hôpital Pitié-Salpêtrière, Paris, France
| | - Emelyne Lécuyer
- INSERM, UMRS 1166, team "Integrative Biology of Atherosclerosis", Sorbonne Universités, Hôpital Pitié-Salpêtrière, Paris, France
| | - Benoit Chassaing
- Neuroscience Institute and Institute for Biomedical Sciences, Georgia State University, Atlanta, GA, USA.,INSERM, U1016, team "Mucosal microbiota in chronic inflammatory diseases", Paris, France.,Université de Paris, Paris, France
| | - Moez Rhimi
- Institut Micalis, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Marie Lhomme
- Institute of Cardiometabolism and Nutrition (ICAN), Hôpital Pitié-Salpêtrière, Paris, France
| | - Samira Boudebbouze
- Institut Micalis, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Farid Ichou
- Institute of Cardiometabolism and Nutrition (ICAN), Hôpital Pitié-Salpêtrière, Paris, France
| | - Júlia Haro Barceló
- INSERM, UMRS 1166, team "Integrative Biology of Atherosclerosis", Sorbonne Universités, Hôpital Pitié-Salpêtrière, Paris, France
| | - Thierry Huby
- INSERM, UMRS 1166, team "Integrative Biology of Atherosclerosis", Sorbonne Universités, Hôpital Pitié-Salpêtrière, Paris, France.,Institute of Cardiometabolism and Nutrition (ICAN), Hôpital Pitié-Salpêtrière, Paris, France
| | - Maryse Guerin
- INSERM, UMRS 1166, team "Integrative Biology of Atherosclerosis", Sorbonne Universités, Hôpital Pitié-Salpêtrière, Paris, France.,Institute of Cardiometabolism and Nutrition (ICAN), Hôpital Pitié-Salpêtrière, Paris, France
| | - Philippe Giral
- INSERM, UMRS 1166, team "Integrative Biology of Atherosclerosis", Sorbonne Universités, Hôpital Pitié-Salpêtrière, Paris, France.,Institute of Cardiometabolism and Nutrition (ICAN), Hôpital Pitié-Salpêtrière, Paris, France
| | - Emmanuelle Maguin
- Institut Micalis, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Nathalie Kapel
- Laboratoire de Coprologie Fonctionnelle, Hôpital Pitié-Salpêtrière, Paris, France.,EA 4065 "Ecosystème intestinal, probiotiques, antibiotiques", Faculté des Sciences Pharmaceutiques et Biologiques Paris Descartes, Paris, France
| | - Philippe Gérard
- Institut Micalis, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Karine Clément
- Sorbonne/INSERM, UMRS 1269, Nutrition et obésités : approches systémiques (nutriOmics), Hôpital Pitié-Salpêtrière, Paris, France
| | - Philippe Lesnik
- INSERM, UMRS 1166, team "Integrative Biology of Atherosclerosis", Sorbonne Universités, Hôpital Pitié-Salpêtrière, Paris, France. .,Institute of Cardiometabolism and Nutrition (ICAN), Hôpital Pitié-Salpêtrière, Paris, France.
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Mkaouar H, Akermi N, Mariaule V, Boudebbouze S, Gaci N, Szukala F, Pons N, Marquez J, Gargouri A, Maguin E, Rhimi M. Siropins, novel serine protease inhibitors from gut microbiota acting on human proteases involved in inflammatory bowel diseases. Microb Cell Fact 2016; 15:201. [PMID: 27894344 PMCID: PMC5127057 DOI: 10.1186/s12934-016-0596-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Accepted: 11/08/2016] [Indexed: 02/05/2023] Open
Abstract
Background In eukaryotes, the serpins constitute a wide family of protease inhibitors regulating many physiological pathways. Many reports stressed the key role of serpins in several human physiopathologies including mainly the inflammatory bowel diseases. In this context, eukaryotic serpins were largely studied and their use to limit inflammation was reported. In comparison to that, bacterial serpins and mainly those from human gut microbiota remain poorly studied. Results The two genes encoding for putative serpins from the human gut bacterium Eubacterium sireaum, display low sequence identities. These genes were overexpressed and the encoded proteins, named Siropins, were purified. Activity studies demonstrated that both purified proteins inhibited serine proteases but surprisingly they preferentially inhibited two human serine proteases (Human Neutrophil Elastase and Proteinase3). The biochemical characterization of these Siropins revealed that Siropin 1 was the most active and stable at low pH values while Siropin 2 was more thermoactive and thermostable. Kinetic analysis allowed the determination of the stoichiometry of inhibition (SI) which was around 1 and of the association rate constants of 7.7 × 104 for the Human Neutrophil Elastase and 2.6 × 105 for the Proteinase3. Moreover, both Siropins displayed the ability to inhibit proteases usually present in fecal waters. Altogether our data indicate the high efficiency of Siropins and their probable involvement in the control of the overall intestine protease activity. Conclusions Here we report the purification and the biochemical characterization of two novel serpins originated from Eubacterium sireaum, a human gastro-intestinal tract commensal bacteria. These proteins that we called Siropins, efficiently inhibited two human proteases reported to be associated with inflammatory bowel diseases. The determination of the biochemical properties of these enzymes revealed different temperature and pH behaviours that may reflect adaptation of this human commensal bacterium to different ecological environments. To the best of our knowledge, it is the first bacterial serpins showing an attractive inhibition of fecal proteases recovered from a mice group with chemically induced inflammation. Altogether our data highlight the interesting potential of Siropins, and serpins from the human gut microbiota in general, to be used as new alternative to face inflammatory diseases. Electronic supplementary material The online version of this article (doi:10.1186/s12934-016-0596-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Héla Mkaouar
- UMR 1319 Micalis, INRA, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France.,Laboratory of Molecular Biology of Eukaryotes, Center of Biotechnology of Sfax, University of Sfax, 3038, Sfax, Tunisia
| | - Nizar Akermi
- UMR 1319 Micalis, INRA, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France.,Laboratory of Molecular Biology of Eukaryotes, Center of Biotechnology of Sfax, University of Sfax, 3038, Sfax, Tunisia
| | - Vincent Mariaule
- European Molecular Biology Laboratory, Grenoble Outstation, 71 Avenue des Martyrs, CS 90181, 38042 Cedex 9, Grenoble, France
| | - Samira Boudebbouze
- UMR 1319 Micalis, INRA, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France
| | - Nadia Gaci
- UMR 1319 Micalis, INRA, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France
| | - Florette Szukala
- UMR 1319 Micalis, INRA, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France
| | - Nicolas Pons
- INRA, Institut National de la Recherche Agronomique, US 1367 Metagenopolis, Jouy-en-Josas, France
| | - Josan Marquez
- European Molecular Biology Laboratory, Grenoble Outstation, 71 Avenue des Martyrs, CS 90181, 38042 Cedex 9, Grenoble, France
| | - Ali Gargouri
- Laboratory of Molecular Biology of Eukaryotes, Center of Biotechnology of Sfax, University of Sfax, 3038, Sfax, Tunisia
| | - Emmanuelle Maguin
- UMR 1319 Micalis, INRA, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France
| | - Moez Rhimi
- UMR 1319 Micalis, INRA, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France.
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Rhimi M, Bermudez-Humaran LG, Huang Y, Boudebbouze S, Gaci N, Garnier A, Gratadoux JJ, Mkaouar H, Langella P, Maguin E. The secreted L-arabinose isomerase displays anti-hyperglycemic effects in mice. Microb Cell Fact 2015; 14:204. [PMID: 26691177 PMCID: PMC4687139 DOI: 10.1186/s12934-015-0391-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 11/27/2015] [Indexed: 12/02/2022] Open
Abstract
Background The l-arabinose isomerase is an intracellular enzyme which converts l-arabinose into l-ribulose in living systems and d-galactose into d-tagatose in industrial processes and at industrial scales. d-tagatose is a natural ketohexose with potential uses in pharmaceutical and food industries. The d-galactose isomerization reaction is thermodynamically equilibrated, and leads to secondary subproducts at high pH. Therefore, an attractive l-arabinose isomerase should be thermoactive and acidotolerant with high catalytic efficiency. While many reports focused on the set out of a low cost process for the industrial production of d-tagatose, these procedures remain costly. When compared to intracellular enzymes, the production of extracellular ones constitutes an interesting strategy to increase the suitability of the biocatalysts. Results The l-arabinose isomerase (l-AI) from Lactobacillus sakei was expressed in Lactococcus lactis in fusion with the signal peptide of usp45 (SPUsp45). The l-AI protein and activity were detected only in the supernatant of the induced cultures of the recombinant L. lactis demonstrating the secretion in the medium of the intracellular L. sakeil-AI in an active form. Moreover, we showed an improvement in the enzyme secretion using either (1) L. lactis strains deficient for their two major proteases, ClpP and HtrA, or (2) an enhancer of protein secretion in L. lactis fused to the recombinant l-AI with the SPUsp45. Th l-AI enzyme secreted by the recombinant L. lactis strains or produced intracellularly in E. coli, showed the same functional properties than the native enzyme. Furthermore, when mice are fed with the L. lactis strain secreting the l-AI and galactose, tagatose was produced in vivo and reduced the glycemia index. Conclusions We report for the first time the secretion of the intracellular l-arabinose isomerase in the supernatant of food grade L. lactis cultures with hardly
display other secreted proteins. The secreted l-AI originated from the food grade L. sakei 23 K was active and showed the same catalytic and structural properties as the intracellular enzyme. The L. lactis strains secreting the l-arabinose isomerase has the ability to produce d-tagatose in vivo and conferred an anti-hyperglycemic effect to mice.
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Affiliation(s)
- Moez Rhimi
- INRA, UMR 1319 Micalis, Interactions of Firmicutes With Their Environments, 78352, Jouy-en-Josas Cedex, France. .,AgroParisTech, Micalis, Interactions of Firmicutes With Their Environments, 78352, Jouy-en-Josas Cedex, France.
| | - Luis G Bermudez-Humaran
- INRA, UMR 1319 Micalis, Commensal and Probiotics-Host Interactions Laboratory, 78352, Jouy-en-Josas Cedex, France. .,AgroParisTech, Micalis, Commensal and Probiotics-Host Interactions Laboratory, 78352, Jouy-en-Josas Cedex, France.
| | - Yuan Huang
- INRA, UMR 1319 Micalis, Interactions of Firmicutes With Their Environments, 78352, Jouy-en-Josas Cedex, France. .,AgroParisTech, Micalis, Interactions of Firmicutes With Their Environments, 78352, Jouy-en-Josas Cedex, France.
| | - Samira Boudebbouze
- INRA, UMR 1319 Micalis, Interactions of Firmicutes With Their Environments, 78352, Jouy-en-Josas Cedex, France. .,AgroParisTech, Micalis, Interactions of Firmicutes With Their Environments, 78352, Jouy-en-Josas Cedex, France.
| | - Nadia Gaci
- INRA, UMR 1319 Micalis, Interactions of Firmicutes With Their Environments, 78352, Jouy-en-Josas Cedex, France. .,AgroParisTech, Micalis, Interactions of Firmicutes With Their Environments, 78352, Jouy-en-Josas Cedex, France.
| | - Alexandrine Garnier
- INRA, UMR 1319 Micalis, Interactions of Firmicutes With Their Environments, 78352, Jouy-en-Josas Cedex, France. .,AgroParisTech, Micalis, Interactions of Firmicutes With Their Environments, 78352, Jouy-en-Josas Cedex, France.
| | - Jean-Jacques Gratadoux
- INRA, UMR 1319 Micalis, Commensal and Probiotics-Host Interactions Laboratory, 78352, Jouy-en-Josas Cedex, France. .,AgroParisTech, Micalis, Commensal and Probiotics-Host Interactions Laboratory, 78352, Jouy-en-Josas Cedex, France.
| | - Héla Mkaouar
- INRA, UMR 1319 Micalis, Interactions of Firmicutes With Their Environments, 78352, Jouy-en-Josas Cedex, France. .,AgroParisTech, Micalis, Interactions of Firmicutes With Their Environments, 78352, Jouy-en-Josas Cedex, France.
| | - Philippe Langella
- INRA, UMR 1319 Micalis, Commensal and Probiotics-Host Interactions Laboratory, 78352, Jouy-en-Josas Cedex, France. .,AgroParisTech, Micalis, Commensal and Probiotics-Host Interactions Laboratory, 78352, Jouy-en-Josas Cedex, France.
| | - Emmanuelle Maguin
- INRA, UMR 1319 Micalis, Interactions of Firmicutes With Their Environments, 78352, Jouy-en-Josas Cedex, France. .,AgroParisTech, Micalis, Interactions of Firmicutes With Their Environments, 78352, Jouy-en-Josas Cedex, France.
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Borgi MA, Boudebbouze S, Mkaouar H, Maguin E, Rhimi M. Bacillus phytases: Current status and future prospects. Bioengineered 2015; 6:233-6. [PMID: 25946551 PMCID: PMC4601277 DOI: 10.1080/21655979.2015.1048050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 04/24/2015] [Accepted: 04/29/2015] [Indexed: 10/23/2022] Open
Abstract
Phytases catalyze the hydrolysis of phytic acid in a stepwise manner to lower inositol phosphates, myo-inositol (having important role in metabolism and signal transduction pathways), and inorganic phosphate. These enzymes have been widely used in animal feed in order to improve phosphorus nutrition and to decrease pollution in animal waste. Compared to previously described phytases, the phytase (PhyL) from Bacillus licheniformis ATCC 14580 has attractive biochemical properties which can increase the profitability of several biotechnological procedures (animal nutrition, humain health…etc). Due to its amino acid sequence with critical substitutions, the PhyL could be a model to enhance other phytases features, in terms of thermal stability and high activity. Otherwise, an engineered PhyL, with low pH optimum, will represent a challenge within the class of β- propeller phytases.
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Affiliation(s)
- Mohamed Ali Borgi
- Faculty of Sciences of Gafsa - Unit of Macromolecular Biochemistry and Genetic; Department of Life Sciences; Zarroug, Gafsa, Tunisia
| | | | | | | | - Moez Rhimi
- INRA, UMR 1319 Micalis;Jouy-en-Josas, France
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El Kafsi H, Binesse J, Loux V, Buratti J, Boudebbouze S, Dervyn R, Kennedy S, Galleron N, Quinquis B, Batto JM, Moumen B, Maguin E, van de Guchte M. Lactobacillus delbrueckii ssp. lactis and ssp. bulgaricus: a chronicle of evolution in action. BMC Genomics 2014; 15:407. [PMID: 24884896 PMCID: PMC4082628 DOI: 10.1186/1471-2164-15-407] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 05/14/2014] [Indexed: 11/10/2022] Open
Abstract
Background Lactobacillus delbrueckii ssp. lactis and ssp. bulgaricus are lactic acid producing bacteria that are largely used in dairy industries, notably in cheese-making and yogurt production. An earlier in-depth study of the first completely sequenced ssp. bulgaricus genome revealed the characteristics of a genome in an active phase of rapid evolution, in what appears to be an adaptation to the milk environment. Here we examine for the first time if the same conclusions apply to the ssp. lactis, and discuss intra- and inter-subspecies genomic diversity in the context of evolutionary adaptation. Results Both L. delbrueckii ssp. show the signs of reductive evolution through the elimination of superfluous genes, thereby limiting their carbohydrate metabolic capacities and amino acid biosynthesis potential. In the ssp. lactis this reductive evolution has gone less far than in the ssp. bulgaricus. Consequently, the ssp. lactis retained more extended carbohydrate metabolizing capabilities than the ssp. bulgaricus but, due to high intra-subspecies diversity, very few carbohydrate substrates, if any, allow a reliable distinction of the two ssp. We further show that one of the most important traits, lactose fermentation, of one of the economically most important dairy bacteria, L. delbruecki ssp. bulgaricus, relies on horizontally acquired rather than deep ancestral genes. In this sense this bacterium may thus be regarded as a natural GMO avant la lettre. Conclusions The dairy lactic acid producing bacteria L. delbrueckii ssp. lactis and ssp. bulgaricus appear to represent different points on the same evolutionary track of adaptation to the milk environment through the loss of superfluous functions and the acquisition of functions that allow an optimized utilization of milk resources, where the ssp. bulgaricus has progressed further away from the common ancestor. Electronic supplementary material The online version of this article (doi:10.1186/1471-2164-15-407) contains supplementary material, which is available to authorized users.
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8
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Gaci N, Dobrijevic D, Boudebbouze S, Moumen B, Maguin E, Rhimi M. Patented biotechnological applications of serpin: an update. ACTA ACUST UNITED AC 2014; 7:137-43. [PMID: 23270322 DOI: 10.2174/1872215611307020008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 12/15/2012] [Indexed: 11/22/2022]
Abstract
The Serine Protease Inhibitors (Serpins) have been a focus of research by biomedical industries due to their critical role in human health. The use of serpin in the treatment of many diseases was widely investigated through the identification of new genes encoding these proteins in all kingdoms of life. The characterization of these genes revealed that they encoded proteins having low sequence homologies. Future developments are focusing not only on the protease inhibition activity, but also on the other effects due to the interactions of serpins with other components such as hormone transport. Here we give a concise overview of the most recent patents that have been reported in this field of research.
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Affiliation(s)
- Nadia Gaci
- INRA, UMR1319 Micalis Domaine de Vilvert, F-78350 Jouy-en-Josas
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9
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Boudebbouze S, Coleman AW, Tauran Y, Mkaouar H, Perret F, Garnier A, Brioude A, Kim B, Maguin E, Rhimi M. Discriminatory antibacterial effects of calix[n]arene capped silver nanoparticles with regard to gram positive and gram negative bacteria. Chem Commun (Camb) 2014; 49:7150-2. [PMID: 23831853 DOI: 10.1039/c3cc42838a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Silver nanoparticles capped with nine different sulphonated calix[n]arenes were tested for their anti-bacterial effects against B. subtilis and E. coli at an apparent concentration of 100 nM in calix[n]arene. The results show the para-sulphonato-calix[n]arenes are active against Gram positive bacteria and the derivatives having sulphonate groups at both para and alkyl terminal positions are active against Gram negative bacteria. The calix[6]arene derivative with only O-alkyl sulphonate groups shows bactericidal activity.
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Dobrijevic D, Di Liberto G, Tanaka K, de Wouters T, Dervyn R, Boudebbouze S, Binesse J, Blottière HM, Jamet A, Maguin E, van de Guchte M. High-throughput system for the presentation of secreted and surface-exposed proteins from Gram-positive bacteria in functional metagenomics studies. PLoS One 2013; 8:e65956. [PMID: 23799065 PMCID: PMC3682982 DOI: 10.1371/journal.pone.0065956] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Accepted: 04/30/2013] [Indexed: 12/13/2022] Open
Abstract
Complex microbial ecosystems are increasingly studied through the use of metagenomics approaches. Overwhelming amounts of DNA sequence data are generated to describe the ecosystems, and allow to search for correlations between gene occurrence and clinical (e.g. in studies of the gut microbiota), physico-chemical (e.g. in studies of soil or water environments), or other parameters. Observed correlations can then be used to formulate hypotheses concerning microbial gene functions in relation to the ecosystem studied. In this context, functional metagenomics studies aim to validate these hypotheses and to explore the mechanisms involved. One possible approach is to PCR amplify or chemically synthesize genes of interest and to express them in a suitable host in order to study their function. For bacterial genes, Escherichia coli is often used as the expression host but, depending on the origin and nature of the genes of interest and the test system used to evaluate their putative function, other expression systems may be preferable. In this study, we developed a system to evaluate the role of secreted and surface-exposed proteins from Gram-positive bacteria in the human gut microbiota in immune modulation. We chose to use a Gram-positive host bacterium, Bacillus subtilis, and modified it to provide an expression background that behaves neutral in a cell-based immune modulation assay, in vitro. We also adapted an E. coli – B. subtilis shuttle expression vector for use with the Gateway high-throughput cloning system. Finally, we demonstrate the functionality of this host-vector system through the cloning and expression of a flagellin-coding sequence, and show that the expression-clone elicits an inflammatory response in a human intestinal epithelial cell line. The expression host can easily be adapted to assure neutrality in other assay systems, allowing the use of the presented presentation system in functional metagenomics of the gut and other ecosystems.
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Affiliation(s)
- Dragana Dobrijevic
- INRA, UMR1319 Micalis, Jouy-en-Josas, France
- AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - Gaetana Di Liberto
- INRA, UMR1319 Micalis, Jouy-en-Josas, France
- AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - Kosei Tanaka
- INRA, UMR1319 Micalis, Jouy-en-Josas, France
- AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - Tomas de Wouters
- INRA, UMR1319 Micalis, Jouy-en-Josas, France
- AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - Rozenn Dervyn
- INRA, UMR1319 Micalis, Jouy-en-Josas, France
- AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - Samira Boudebbouze
- INRA, UMR1319 Micalis, Jouy-en-Josas, France
- AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - Johan Binesse
- INRA, UMR1319 Micalis, Jouy-en-Josas, France
- AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - Hervé M. Blottière
- INRA, UMR1319 Micalis, Jouy-en-Josas, France
- AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - Alexandre Jamet
- INRA, UMR1319 Micalis, Jouy-en-Josas, France
- AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - Emmanuelle Maguin
- INRA, UMR1319 Micalis, Jouy-en-Josas, France
- AgroParisTech, UMR Micalis, Jouy-en-Josas, France
| | - Maarten van de Guchte
- INRA, UMR1319 Micalis, Jouy-en-Josas, France
- AgroParisTech, UMR Micalis, Jouy-en-Josas, France
- * E-mail:
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Vincent V, Aghajari N, Pollet N, Boisson A, Boudebbouze S, Haser R, Maguin E, Rhimi M. The acid tolerant and cold-active β-galactosidase from Lactococcus lactis strain is an attractive biocatalyst for lactose hydrolysis. Antonie Van Leeuwenhoek 2012. [PMID: 23180374 DOI: 10.1007/s10482-012-9852-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The gene encoding the β-galactosidase from the dairy Lactococcus lactis IL1403 strain was cloned, sequenced and overexpressed in Escherichia coli. The purified enzyme has a tetrameric arrangement composed of four identical 120 kDa subunits. Biochemical characterization showed that it is optimally active within a wide range of temperatures from 15 to 55 °C and of pH from 6.0 to 7.5. For its maximal activity this enzyme requires only 0.8 mM Fe(2+) and 1.6 mM Mg(2+). Purified protein displayed a high catalytic efficiency of 102 s(-1) mM(-1) for lactose. The enzyme stability was increased by immobilization mainly at low pH (from 4.0 to 5.5) and high temperatures (55 and 60 °C). The bioconversion of lactose using the L. lactis β-galactosidase allows the production of lactose with a high bioconversion rate (98 %) within a wide range of pH and temperature.
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Affiliation(s)
- Violette Vincent
- Laboratory for Biocrystallography and Structural Biology of Therapeutic Targets, Bases Moléculaires des Systèmes Infectieux-UMR 5086, CNRS/Université de Lyon 1, Institut de Biologie et Chimie des Protéines-FR3302, 7 Passage du Vercors, 69367, Lyon Cedex 07, France
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12
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Rochat T, Boudebbouze S, Gratadoux JJ, Blugeon S, Gaudu P, Langella P, Maguin E. Proteomic analysis of spontaneous mutants of Lactococcus lactis
: Involvement of GAPDH and arginine deiminase pathway in H2
O2
resistance. Proteomics 2012; 12:1792-805. [DOI: 10.1002/pmic.201100465] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tatiana Rochat
- INRA; UMR1319 Micalis; Jouy-en-Josas; France
- AgroParisTech; UMR Micalis; Jouy-en-Josas; France
| | - Samira Boudebbouze
- INRA; UMR1319 Micalis; Jouy-en-Josas; France
- AgroParisTech; UMR Micalis; Jouy-en-Josas; France
| | - Jean-Jacques Gratadoux
- INRA; UMR1319 Micalis; Jouy-en-Josas; France
- AgroParisTech; UMR Micalis; Jouy-en-Josas; France
| | - Sébastien Blugeon
- INRA; UMR1319 Micalis; Jouy-en-Josas; France
- AgroParisTech; UMR Micalis; Jouy-en-Josas; France
| | - Philippe Gaudu
- INRA; UMR1319 Micalis; Jouy-en-Josas; France
- AgroParisTech; UMR Micalis; Jouy-en-Josas; France
| | - Philippe Langella
- INRA; UMR1319 Micalis; Jouy-en-Josas; France
- AgroParisTech; UMR Micalis; Jouy-en-Josas; France
| | - Emmanuelle Maguin
- INRA; UMR1319 Micalis; Jouy-en-Josas; France
- AgroParisTech; UMR Micalis; Jouy-en-Josas; France
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13
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Boudebbouze S, Maguin E, Rhimi M. Bacterial L-Arabinose Isomerases: Industrial Application for D-Tagatose Production. ACTA ACUST UNITED AC 2011; 5:194-201. [DOI: 10.2174/187221511797636248] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Revised: 08/08/2011] [Accepted: 08/10/2011] [Indexed: 11/22/2022]
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Rhimi M, Bajic G, Ilhammami R, Boudebbouze S, Maguin E, Haser R, Aghajari N. The acid-tolerant L-arabinose isomerase from the mesophilic Shewanella sp. ANA-3 is highly active at low temperatures. Microb Cell Fact 2011; 10:96. [PMID: 22074172 PMCID: PMC3248863 DOI: 10.1186/1475-2859-10-96] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2011] [Accepted: 11/10/2011] [Indexed: 11/26/2022] Open
Abstract
Background L-arabinose isomerases catalyse the isomerization of L-arabinose into L-ribulose at insight biological systems. At industrial scale of this enzyme is used for the bioconversion of D-galactose into D-tagatose which has many applications in pharmaceutical and agro-food industries. The isomerization reaction is thermodynamically equilibrated, and therefore the bioconversion rates is shifted towards tagatose when the temperature is increased. Moreover, to prevent secondary reactions it will be of interest to operate at low pH. The profitability of this D-tagatose production process is mainly related to the use of lactose as cheaper raw material. In many dairy products it will be interesting to produce D-tagatose during storage. This requires an efficient L-arabinose isomerase acting at low temperature and pH values. Results The gene encoding the L-arabinose isomerase from Shewanella sp. ANA-3 was cloned and overexpressed in Escherichia coli. The purified protein has a tetrameric arrangement composed by four identical 55 kDa subunits. The biochemical characterization of this enzyme showed that it was distinguishable by its maximal activity at low temperatures comprised between 15-35°C. Interestingly, this biocatalyst preserves more than 85% of its activity in a broad range of temperatures from 4.0 to 45°C. Shewanella sp. ANA-3 L-arabinose isomerase was also optimally active at pH 5.5-6.5 and maintained over 80% of its activity at large pH values from 4.0 to 8.5. Furthermore, this enzyme exhibited a weak requirement for metallic ions for its activity evaluated at 0.6 mM Mn2+. Stability studies showed that this protein is highly stable mainly at low temperature and pH values. Remarkably, T268K mutation clearly enhances the enzyme stability at low pH values. Use of this L-arabinose isomerase for D-tagatose production allows the achievement of attractive bioconversion rates of 16% at 4°C and 34% at 35°C. Conclusions Here we reported the purification and the biochemical characterization of the novel Shewanella sp. ANA-3 L-arabinose isomerase. Determination of the biochemical properties demonstrated that this enzyme was highly active at low temperatures. The generated T268K mutant displays an increase of the enzyme stability essentially at low pH. These features seem to be very attractive for the bioconversion of D-galactose into D-tagatose at low temperature which is very interesting from industrial point of view.
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Affiliation(s)
- Moez Rhimi
- Laboratory for BioCrystallography and Structural Biology of Therapeutic Targets, Bases Moléculaires et Structurales des Systèmes Infectieux, UMR5086 CNRS/Université de Lyon1, 7 Passage du Vercors, Lyon cedex 07, France.
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15
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Jebors S, Tauran Y, Aghajari N, Boudebbouze S, Maguin E, Haser R, Coleman AW, Rhimi M. Supramolecular stabilization of acid tolerant l-arabinose isomerase from Lactobacillus sakei. Chem Commun (Camb) 2011; 47:12307-9. [DOI: 10.1039/c1cc14930j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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16
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Rhimi M, Ilhammami R, Bajic G, Boudebbouze S, Maguin E, Haser R, Aghajari N. The acid tolerant L-arabinose isomerase from the food grade Lactobacillus sakei 23K is an attractive D-tagatose producer. Bioresour Technol 2010; 101:9171-9177. [PMID: 20688514 DOI: 10.1016/j.biortech.2010.07.036] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2010] [Revised: 06/10/2010] [Accepted: 07/09/2010] [Indexed: 05/29/2023]
Abstract
The araA gene encoding an L-arabinose isomerase (L-AI) from the psychrotrophic and food grade Lactobacillus sakei 23K was cloned, sequenced and over-expressed in Escherichia coli. The recombinant enzyme has an apparent molecular weight of nearly 220 kDa, suggesting it is a tetramer of four 54 kDa monomers. The enzyme is distinguishable from previously reported L-AIs by its high activity and stability at temperatures from 4 to 40 degrees C, and pH from 3 to 8, and by its low metal requirement of only 0.8 mM Mn(2+) and 0.8 mM Mg(2+) for its maximal activity and thermostability. Enzyme kinetic studies showed that this enzyme displays a high catalytic efficiency allowing D-galactose bioconversion rates of 20% and 36% at 10 and 45 degrees C, respectively, which are useful for commercial production of D-tagatose.
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Affiliation(s)
- Moez Rhimi
- Laboratoire de BioCristallographie, Institut de Biologie et Chimie des Protéines, UMR 5086-CNRS/Université de Lyon, IFR128 BioSciences Gerland-Lyon Sud, 7 Passage du Vercors, F-69367 Lyon cedex 07, France
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17
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Rhimi M, Aghajari N, Jaouadi B, Juy M, Boudebbouze S, Maguin E, Haser R, Bejar S. Exploring the acidotolerance of beta-galactosidase from Lactobacillus delbrueckii subsp. bulgaricus: an attractive enzyme for lactose bioconversion. Res Microbiol 2009; 160:775-84. [PMID: 19786095 DOI: 10.1016/j.resmic.2009.09.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2009] [Revised: 09/01/2009] [Accepted: 09/03/2009] [Indexed: 02/08/2023]
Abstract
The LacZ gene encoding beta-galactosidase from Lactobacillus delbrueckii subsp. bulgaricus ATCC 11842 (L. bulgaricus) was cloned, sequenced and expressed in Escherichia coli, followed by purification and characterization of the protein. The recombinant enzyme was shown to be a homotetramer and could be distinguished from homologues by its relatively low and broad optimal temperature range, from 35 to 50 degrees C, coupled with an optimal pH of 5.0-5.5. Remarkably, the E491A mutant showed the same optimal temperature, but displayed an optimal pH at 6.5-7.0. Whilst these beta-galactosidases are inhibited by Cu(2+) they require only 1mM Mn(2+) and 1mM Co(2+) for optimal activity and thermostability. The wild-type enzyme was remarkably stable at acid pH values when compared to mutant E491A. Kinetic studies demonstrated that the E491A mutation affected catalysis rather than enzyme affinity. Furthermore, the wild-type protein efficiently cleaved lactose extracted from whey; however, in milk the E491A mutant showed the highest lactose bioconversion rate. Thus, these enzymes are interesting at the industrial level for hydrolysis of lactose extracted from whey or milk, and thus could contribute to overcoming the lactose intolerance problem generated by milk products.
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Affiliation(s)
- Moez Rhimi
- Laboratoire d'Enzymes et de Métabolites des Procaryotes, Centre de Biotechnologie de Sfax, Route de Sidi Mansour Km 6 BP, 3038 Sfax, Tunisia
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Herve-Jimenez L, Guillouard I, Guedon E, Boudebbouze S, Hols P, Monnet V, Maguin E, Rul F. Postgenomic analysis of streptococcus thermophilus cocultivated in milk with Lactobacillus delbrueckii subsp. bulgaricus: involvement of nitrogen, purine, and iron metabolism. Appl Environ Microbiol 2009; 75:2062-73. [PMID: 19114510 PMCID: PMC2663229 DOI: 10.1128/aem.01984-08] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2008] [Accepted: 12/22/2008] [Indexed: 11/20/2022] Open
Abstract
Streptococcus thermophilus is one of the most widely used lactic acid bacteria in the dairy industry, in particular in yoghurt manufacture, where it is associated with Lactobacillus delbrueckii subsp. bulgaricus. This bacterial association, known as a proto-cooperation, is poorly documented at the molecular and regulatory levels. We thus investigate the kinetics of the transcriptomic and proteomic modifications of S. thermophilus LMG 18311 in response to the presence of L. delbrueckii subsp. bulgaricus ATCC 11842 during growth in milk at two growth stages. Seventy-seven different genes or proteins (4.1% of total coding sequences), implicated mainly in the metabolism of nitrogen (24%), nucleotide base (21%), and iron (20%), varied specifically in coculture. One of the most unpredicted results was a significant decrease of most of the transcripts and enzymes involved in purine biosynthesis. Interestingly, the expression of nearly all genes potentially encoding iron transporters of S. thermophilus decreased, whereas that of iron-chelating dpr as well as that of the fur (perR) regulator genes increased, suggesting a reduction in the intracellular iron concentration, probably in response to H(2)O(2) production by L. bulgaricus. The present study reveals undocumented nutritional exchanges and regulatory relationships between the two yoghurt bacteria, which provide new molecular clues for the understanding of their associative behavior.
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Chouayekh H, Serror P, Boudebbouze S, Maguin E. Highly efficient production of the staphylococcal nuclease reporter in Lactobacillus bulgaricus governed by the promoter of the hlbA gene. FEMS Microbiol Lett 2009; 293:232-9. [PMID: 19243442 DOI: 10.1111/j.1574-6968.2009.01522.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Lactobacillus delbrueckii ssp. bulgaricus (L. bulgaricus) genome sequence analysis revealed the presence of two genes that encode histone-like HU proteins (hlbA and hlbB) showing extensive similarity to other bacterial homologues. These genes were found to be extremely conserved among several L. bulgaricus strains. The hlbA gene was shown to be constitutively transcribed from a unique promoter (phlbA) during normal growth, whereas hlbB did not seem to be expressed under usual laboratory conditions. Using a reporter cassette in which the staphylococcal nuclease was fused at its N-terminus to the lactococcal signal peptide Usp45 (SP Usp45), we have demonstrated that phlbA promotes high expression of the reporter in L. bulgaricus, which correlated with an abundant secretion of the mature nuclease in the supernatant fraction. Quantification of the exported enzyme reveals a secretion level approximately threefold higher when the expression of the reporter was under the control of phlbA compared with the lactococcal usp45 promoter. Together, these results indicate that phlbA is suitable for gene expression in L. bulgaricus, that SP Usp45 is functionally recognized and processed by the L. bulgaricus secretion machinery and that the nuclease reporter gene can be used for the identification of exported products in this bacterium.
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Affiliation(s)
- Hichem Chouayekh
- Laboratoire d'Enzymes et de Métabolites des Procaryotes, Centre de Biotechnologie de Sfax, Sfax, Tunisie.
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Herve-Jimenez L, Guillouard I, Guedon E, Gautier C, Boudebbouze S, Hols P, Monnet V, Rul F, Maguin E. Physiology ofStreptococcus thermophilusduring the late stage of milk fermentation with special regard to sulfur amino-acid metabolism. Proteomics 2008; 8:4273-86. [DOI: 10.1002/pmic.200700489] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Fernandez A, Ogawa J, Penaud S, Boudebbouze S, Ehrlich D, van de Guchte M, Maguin E. Rerouting of pyruvate metabolism during acid adaptation in Lactobacillus bulgaricus. Proteomics 2008; 8:3154-63. [DOI: 10.1002/pmic.200700974] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Penaud S, Fernandez A, Boudebbouze S, Ehrlich SD, Maguin E, van de Guchte M. Induction of heavy-metal-transporting CPX-type ATPases during acid adaptation in Lactobacillus bulgaricus. Appl Environ Microbiol 2006; 72:7445-54. [PMID: 16997986 PMCID: PMC1694267 DOI: 10.1128/aem.01109-06] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Lactobacillus bulgaricus is a lactic acid bacteria (LAB) that, through the production of lactic acid, gradually acidifies its environment during growth. In the course of this process, L. bulgaricus acquires an improved tolerance to acidity. A survey of the recently established genome sequence shows that this bacterium possesses few of the pH control functions that have been described in other LAB and raises the question of what other mechanisms could be involved in its adaptation to the decreasing environmental pH. In some bacteria other than LAB, ion transport systems have been implicated in acid adaptation. We therefore studied the expression of this type of transport system during acid adaptation in L. bulgaricus by reverse transcription and real-time quantitative PCR and mapped transcription start sites. Intriguingly, the most significantly induced were three ATPases carrying the CPX signature of heavy-metal transporters. Protein homology and the presence of a conserved sequence motif in the promoter regions of the genes encoding these proteins strongly suggest that they are involved in copper homeostasis. Induction of this system is thought to assist in avoiding indirect damage that could result from medium acidification.
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Affiliation(s)
- S Penaud
- Génétique Microbienne, INRA-CRJ, 78352 Jouy en Josas cedex, France
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Lim EM, Lafon A, Dridi L, Boudebbouze S, Dusko Ehrlich S, Maguin E. Identification de protéines de stress chez Lactobacillus delbrueckii bulgaricus par électrophorèse bidimensionnelle. ACTA ACUST UNITED AC 2001. [DOI: 10.1051/lait:2001135] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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