1
|
Zuo X, Pan L, Zhang W, Zhu J, Qin Y, Xu X, Wang Q. The Discovery, Molecular Cloning, and Characterization of Dextransucrase LmDexA and Its Active Truncated Mutant from Leuconostoc mesenteroides NN710. Molecules 2024; 29:3242. [PMID: 38999194 PMCID: PMC11243177 DOI: 10.3390/molecules29133242] [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: 06/07/2024] [Revised: 06/30/2024] [Accepted: 07/01/2024] [Indexed: 07/14/2024] Open
Abstract
Dextransucrases play a crucial role in the production of dextran from economical sucrose; therefore, there is a pressing demand to explore novel dextransucrases with better performance. This study characterized a dextransucrase enzyme, LmDexA, which was identified from the Leuconostoc mesenteroides NN710. This bacterium was isolated from the soil of growing dragon fruit in Guangxi province, China. We successfully constructed six different N-terminal truncated variants through sequential analysis. Additionally, a truncated variant, ΔN190LmDexA, was constructed by removing the 190 amino acids fragment from the N-terminal. This truncated variant was then successfully expressed heterologously in Escherichia coli and purified. The purified ΔN190LmDexA demonstrated optimal hydrolysis activity at a pH of 5.6 and a temperature of 30 °C. Its maximum specific activity was measured to be 126.13 U/mg, with a Km of 13.7 mM. Results demonstrated a significant improvement in the heterologous expression level and total enzyme activity of ΔN190LmDexA. ΔN190LmDexA exhibited both hydrolytic and transsaccharolytic enzymatic activities. When sucrose was used as the substrate, it primarily produced high-molecular-weight dextran (>400 kDa). However, upon the addition of maltose as a receptor, it resulted in the production of a significant amount of oligosaccharides. Our results can provide valuable information for enhancing the characteristics of recombinant dextransucrase and potentially converting sucrose into high-value-added dextran and oligosaccharides.
Collapse
Affiliation(s)
- Xiaoqiong Zuo
- National Key Laboratory of Non-Food Biomass Energy Technology, Guangxi Academy of Sciences, Nanning 530007, China; (X.Z.); (L.P.); (W.Z.); (Y.Q.); (X.X.)
| | - Lixia Pan
- National Key Laboratory of Non-Food Biomass Energy Technology, Guangxi Academy of Sciences, Nanning 530007, China; (X.Z.); (L.P.); (W.Z.); (Y.Q.); (X.X.)
| | - Wenchao Zhang
- National Key Laboratory of Non-Food Biomass Energy Technology, Guangxi Academy of Sciences, Nanning 530007, China; (X.Z.); (L.P.); (W.Z.); (Y.Q.); (X.X.)
| | - Jing Zhu
- College of Food and Quality Engineering, Nanning University, Nanning 530200, China;
| | - Yan Qin
- National Key Laboratory of Non-Food Biomass Energy Technology, Guangxi Academy of Sciences, Nanning 530007, China; (X.Z.); (L.P.); (W.Z.); (Y.Q.); (X.X.)
| | - Xiuying Xu
- National Key Laboratory of Non-Food Biomass Energy Technology, Guangxi Academy of Sciences, Nanning 530007, China; (X.Z.); (L.P.); (W.Z.); (Y.Q.); (X.X.)
| | - Qingyan Wang
- National Key Laboratory of Non-Food Biomass Energy Technology, Guangxi Academy of Sciences, Nanning 530007, China; (X.Z.); (L.P.); (W.Z.); (Y.Q.); (X.X.)
| |
Collapse
|
2
|
Sun L, D'Amico DJ. Characterization of microbial community assembly on new wooden vats for use in cheese production. Food Microbiol 2023; 109:104154. [DOI: 10.1016/j.fm.2022.104154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 09/14/2022] [Accepted: 09/21/2022] [Indexed: 10/14/2022]
|
3
|
Hussein SAM, Kareem RA, Al-Dahbi AMH, Birhan M. Investigation of the Role of Leuconostoc mesenteroides subsp. cremoris in Periodontitis around Abutments of Fixed Prostheses. BIOMED RESEARCH INTERNATIONAL 2022; 2022:8790096. [PMID: 35647195 PMCID: PMC9142281 DOI: 10.1155/2022/8790096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 05/03/2022] [Accepted: 05/07/2022] [Indexed: 11/18/2022]
Abstract
This study included the role of Leuconostoc mesenteroides subsp. cremoris in oral diseases such as periodontitis. Material and Method. Isolation and identification of Leuconostoc mesenteroides subsp. cremoris from a saliva sample of twenty patients wearing fixed dental prostheses suffering from periodontitis followed by estimating susceptibility generally to the most common antibiotics and specifically to chlorhexidine (CHX) to determine the MIC of CHX and also screening of the strength of biofilm production under aerobic and anaerobic conditions; here, the study included six groups: Group I: screening of biofilm formation under aerobic condition, Group II: screening the MIC of CHX effect on biofilm formation under aerobic condition, Group III: screening of the MIC of CHX effect on preformed biofilm under aerobic condition, Group IV: screening of biofilm formation under anaerobic condition, Group V: screening of MIC of CHX effect on biofilm formation under anaerobic condition, and Group VI: screening of MIC of CHX effect on preformed biofilm under anaerobic condition. Results. The results showed that about 5 (25%) isolates were identified as L. mesenteroides subsp. cremoris, while 75% are other isolates. Furthermore, susceptibility results to antibiotic showed the sensitivity to penicillin (100%), azithromycin (100%), ciprofloxacin (100%), tetracycline (100%), gentamicin (100%), doxycycline (100%), vancomycin (100%), ofloxacin (60%), chloramphenicol (80%), ampicillin (80%), and cefoxitin (60%). On the other side, the biofilm production assays revealed that all isolates were moderate biofilm former under the aerobic and anaerobic conditions but for the biofilm treated with MIC of CHX, the current study noticed that the strength of the biofilm became weaker in aerobic and anaerobic conditions; regardless, the strength of the biofilm under anaerobic conditions was higher than in that under aerobic conditions, with no significant differences at p ≤ 0.05 depending on the statistical analysis (T-test) before and after the treatment with MIC of CHX in aerobic and anaerobic conditions. Conclusions. The presence of mesenteroides subsp. cremoris in the oral cavity is due to eating foods and vegetables; based on the strength of the biofilm and sensitivity tests, the isolates have less pathogenicity in the oral cavity due to the weakness of the biofilm production and the lack of resistance to antibiotics.
Collapse
Affiliation(s)
| | - Rehab Aamer Kareem
- Department of Prosthodontics, College of Dentistry, University of Dijlah, Iraq
| | | | - Mequanint Birhan
- Department of Mechanical Engineering, Mizan-Tepi University, Ethiopia
| |
Collapse
|
4
|
Zhang YX, Yang JW, Wu YY, Hu XQ, Zhang HB. The stability improvement of dextransucrase by artificial extension modification of the V domain of the enzyme. Enzyme Microb Technol 2021; 151:109919. [PMID: 34649690 DOI: 10.1016/j.enzmictec.2021.109919] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/09/2021] [Accepted: 09/12/2021] [Indexed: 11/16/2022]
Abstract
Improving enzyme stability is very important for enzyme applications. Structural modification is a reliable and effective method to improve the characteristics of protein. By artificially extending the C-terminus, 6 domain modification variants of different sizes were constructed, and a new enzyme species with high stability was obtained. Experimental results affirmed that high stability can be achieved by decreasing the degree of domain freedom. The optimum temperatures of domain modification variants were improved by 10 °C compared with the original enzyme. Specifically, compared with the original enzyme, the half-life of the variant dexYG-fdx (D-F) was increased to 280% under 35 °C and 200% under 45 °C, and the pH tolerance range was wider. Further structural simulations and molecular docking studies provided a reasonable explanation (The increased domain reduced the degree of freedom of the enzyme terminal to some extent) for this variant to increase stability and produce dextran. This study can provide valuable information for increasing the characteristics of recombinant dextransucrase.
Collapse
Affiliation(s)
- Yu-Xin Zhang
- School of Food and Bioengineering, Hefei University of Technology, Tunxi Road No.193, Hefei, Anhui, 230009, China.
| | - Jing-Wen Yang
- School of Food and Bioengineering, Hefei University of Technology, Tunxi Road No.193, Hefei, Anhui, 230009, China.
| | - Yuan-Yuan Wu
- School of Food and Bioengineering, Hefei University of Technology, Tunxi Road No.193, Hefei, Anhui, 230009, China.
| | - Xue-Qin Hu
- School of Food and Bioengineering, Hefei University of Technology, Tunxi Road No.193, Hefei, Anhui, 230009, China.
| | - Hong-Bin Zhang
- School of Food and Bioengineering, Hefei University of Technology, Tunxi Road No.193, Hefei, Anhui, 230009, China.
| |
Collapse
|
5
|
Labadie M, Marchal F, Merbahi N, Girbal-Neuhauser E, Fontagné-Faucher C, Marcato-Romain CE. Response of Controlled Cell Load Biofilms to Cold Atmospheric Plasma Jet: Evidence of Extracellular Matrix Contribution. Life (Basel) 2021; 11:life11070694. [PMID: 34357067 PMCID: PMC8304013 DOI: 10.3390/life11070694] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/12/2021] [Accepted: 07/13/2021] [Indexed: 02/07/2023] Open
Abstract
Aim: Study of the biocidal effect of a cold atmospheric-pressure plasma in ambient air on single-species bacterial biofilms with controlled cell density, characterized by different extracellular matrices. Methods and results: Two bacterial strains were chosen to present different Gram properties and contrasted extracellular matrices: Pseudomonas aeruginosa ATCC 15442 (Gram-negative), and Leuconostoc citreum NRRL B-1299 (Gram-positive). P. aeruginosa biofilm exhibits a complex matrix, rich in proteins while L. citreum presents the specificity to produce glucan-type exopolysaccharides when grown in the presence of sucrose. Plasma was applied on both surface-spread cells and 24-h grown biofilms with controlled cell loads over 5, 10, or 20 min. Surface-spread bacteria showed a time dependent response, with a maximal bacterial reduction of 2.5 log after 20 min of treatment. On the other hand, in our experimental conditions, no bactericidal effect could be observed when treating biofilms of P. aeruginosa and glucan-rich L. citreum. Conclusions: For biofilms presenting equivalent cell loads, the response to plasma treatment seemed to depend on the properties of the extracellular matrix characterized by infrared spectroscopy, scanning electron microscopy, or dry weight. Significance and impact of study: Both cell load standardization and biofilm characterization are paramount factors to consider the biocide effect of plasma treatments. The extracellular matrix could affect the plasma efficacy by physical and/or chemical protective effects.
Collapse
Affiliation(s)
- Maritxu Labadie
- UPS, IUT “A”, LBAE EA 4565 (Laboratoire de Biotechnologies Agroalimentaire et Environnementale), Université de Toulouse, IUT Site d’AUCH, 24 rue d’Embaquès, F-32000 Auch, France; (M.L.); (E.G.-N.); (C.F.-F.)
| | - Frédéric Marchal
- UPS, INPT, CNRS, LAPLACE UMR 5213 (Laboratoire Plasma et Conversion d’Energie), Université de Toulouse, 118 Route de Narbonne, F-31062 Toulouse, France; (F.M.); (N.M.)
| | - Nofel Merbahi
- UPS, INPT, CNRS, LAPLACE UMR 5213 (Laboratoire Plasma et Conversion d’Energie), Université de Toulouse, 118 Route de Narbonne, F-31062 Toulouse, France; (F.M.); (N.M.)
| | - Elisabeth Girbal-Neuhauser
- UPS, IUT “A”, LBAE EA 4565 (Laboratoire de Biotechnologies Agroalimentaire et Environnementale), Université de Toulouse, IUT Site d’AUCH, 24 rue d’Embaquès, F-32000 Auch, France; (M.L.); (E.G.-N.); (C.F.-F.)
| | - Catherine Fontagné-Faucher
- UPS, IUT “A”, LBAE EA 4565 (Laboratoire de Biotechnologies Agroalimentaire et Environnementale), Université de Toulouse, IUT Site d’AUCH, 24 rue d’Embaquès, F-32000 Auch, France; (M.L.); (E.G.-N.); (C.F.-F.)
| | - Claire-Emmanuelle Marcato-Romain
- UPS, IUT “A”, LBAE EA 4565 (Laboratoire de Biotechnologies Agroalimentaire et Environnementale), Université de Toulouse, IUT Site d’AUCH, 24 rue d’Embaquès, F-32000 Auch, France; (M.L.); (E.G.-N.); (C.F.-F.)
- Correspondence: ; Tel.: +33-562-61-63-05
| |
Collapse
|
6
|
Bielik B, Molnár L, Vrabec V, Andrášiová R, Maruščáková IC, Nemcová R, Toporčák J, Mudroňová D. Biofilm-forming lactic acid bacteria of honey bee origin intended for potential probiotic use. Acta Vet Hung 2021; 68:345-353. [PMID: 33496680 DOI: 10.1556/004.2020.00057] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 10/14/2020] [Indexed: 01/09/2023]
Abstract
Scientists around the world are focusing their interest on the use of probiotics in honey bees as an alternative method of prophylaxis against causative agents of both American and European foulbrood. In our study we tested inhibitory activity against Paenibacillus larvae and the biofilm formation activity by various lactic acid bacteria isolated from honey bee guts or fresh pollen samples in the presence of different sugars added to the cultivation media. In addition, we tested the probiotic effect of a newly selected Apilactobacillus kunkeei V18 in an in situ experiment in bee colonies. We found antibacterial activity against P. larvae in four isolates. Biofilm formation activity of varying intensity was noted in six of the seven isolates in the presence of different sugars. The strongest biofilm formation (OD570 ≥ 1) was noted in A. kunkeei V18 in the presence of fructose; moreover, this isolate strongly inhibited the growth of P. larvae under laboratory conditions. Inhibition of P. larvae and Melissococcus plutonius by A. kunkeei V18 in situ was confirmed in a pilot study.
Collapse
Affiliation(s)
- Bohumil Bielik
- 1Clinic of Birds, Exotic and Free Living Animals, University of Veterinary Medicine and Pharmacy, Košice, Slovak Republic
| | - Ladislav Molnár
- 1Clinic of Birds, Exotic and Free Living Animals, University of Veterinary Medicine and Pharmacy, Košice, Slovak Republic
| | - Vladimír Vrabec
- 1Clinic of Birds, Exotic and Free Living Animals, University of Veterinary Medicine and Pharmacy, Košice, Slovak Republic
| | - Romana Andrášiová
- 2Department of Epizootiology and Parasitology, University of Veterinary Medicine and Pharmacy, Košice, Slovak Republic
| | - Ivana Cingel'ová Maruščáková
- 3Department of Microbiology and Immunology, University of Veterinary Medicine and Pharmacy, Komenského 73, 041 81, Košice, Slovak Republic
| | - Radomíra Nemcová
- 3Department of Microbiology and Immunology, University of Veterinary Medicine and Pharmacy, Komenského 73, 041 81, Košice, Slovak Republic
| | - Juraj Toporčák
- 1Clinic of Birds, Exotic and Free Living Animals, University of Veterinary Medicine and Pharmacy, Košice, Slovak Republic
| | - Dagmar Mudroňová
- 3Department of Microbiology and Immunology, University of Veterinary Medicine and Pharmacy, Komenského 73, 041 81, Košice, Slovak Republic
| |
Collapse
|
7
|
Lee S, Kim H, Beuchat LR, Kim Y, Ryu JH. Synergistic antimicrobial activity of oregano and thyme thymol essential oils against Leuconostoc citreum in a laboratory medium and tomato juice. Food Microbiol 2020; 90:103489. [DOI: 10.1016/j.fm.2020.103489] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 12/05/2019] [Accepted: 03/17/2020] [Indexed: 11/28/2022]
|
8
|
Engineering Leuconostoc mesenteroides dextransucrase by inserting disulfide bridges for enhanced thermotolerance. Enzyme Microb Technol 2020; 139:109603. [PMID: 32732025 DOI: 10.1016/j.enzmictec.2020.109603] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 04/28/2020] [Accepted: 05/19/2020] [Indexed: 11/23/2022]
Abstract
The disulfide bridge is a very important part of the peptide chain and plays an important role in stabilizing the protein structure and maintaining its active function. One hundred and fourteen potential disulfide bridges were determined by Disulfide by Design™, and 4 disulfide bridges were constructed for the purpose of obtaining new enzyme species with high thermotolerance. High thermotolerance is achieved by increasing the number of hydrogen bonds between amino acids. The optimum temperatures of mutant L838C-V887C and A948C-A1013C were improved by 10 °C compared to that of the original enzyme, which was beneficial to reduce the viscosity of the reaction system. Some of the mutations resulted in the alteration of catalytic specificity, and the products D739C-F932C and A948C-A1013C catalyzed synthesis of dextran containing a new α(1-4) glycosidic linkage and α(1-2) glycosidic linkage. This study may provide information valuable for increasing the reaction temperature of recombinant dextransucrase. The molecular docking study presents a plausible explanation for reaction specificity alteration and optimum temperature improvement for the mutants.
Collapse
|
9
|
Estrada-Peña A, Cabezas-Cruz A, Obregón D. Resistance of Tick Gut Microbiome to Anti-Tick Vaccines, Pathogen Infection and Antimicrobial Peptides. Pathogens 2020; 9:E309. [PMID: 32331444 PMCID: PMC7238099 DOI: 10.3390/pathogens9040309] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 04/16/2020] [Accepted: 04/21/2020] [Indexed: 12/24/2022] Open
Abstract
Ixodes scapularis ticks harbor microbial communities including pathogenic and non-pathogenic microbes. Pathogen infection increases the expression of several tick gut proteins, which disturb the tick gut microbiota and impact bacterial biofilm formation. Anaplasma phagocytophilum induces ticks to express I. scapularis antifreeze glycoprotein (IAFGP), a protein with antimicrobial activity, while Borrelia burgdorferi induces the expression of PIXR. Here, we tested the resistance of I. scapularis microbiome to A. phagocytophilum infection, antimicrobial peptide IAFGP, and anti-tick immunity specific to PIXR. We demonstrate that A. phagocytophilum infection and IAFGP affect the taxonomic composition and taxa co-occurrence networks, but had limited impact on the functional traits of tick microbiome. In contrast, anti-tick immunity disturbed the taxonomic composition and the functional profile of tick microbiome, by increasing both the taxonomic and pathways diversity. Mechanistically, we show that anti-tick immunity increases the representation and importance of the polysaccharide biosynthesis pathways involved in biofilm formation, while these pathways are under-represented in the microbiome of ticks infected by A. phagocytophilum or exposed to IAFGP. These analyses revealed that tick microbiota is highly sensitive to anti-tick immunity, while it is less sensitive to pathogen infection and antimicrobial peptides. Results suggest that biofilm formation may be a defensive response of tick microbiome to anti-tick immunity.
Collapse
Affiliation(s)
- Agustín Estrada-Peña
- Faculty of Veterinary Medicine, University of Zaragoza, 50013 Zaragoza, Spain
- Group of Research on Emerging Zoonoses, Instituto Agroalimentario de Aragón (IA2), 50013 Zaragoza, Spain
| | - Alejandro Cabezas-Cruz
- UMR BIPAR, INRAE, ANSES, École Nationale Vétérinaire d’Alfort, Université Paris-Est, 94700 Maisons-Alfort, France
| | - Dasiel Obregón
- Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, São Paulo 13400-970, Brazil
- School of Environmental Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| |
Collapse
|
10
|
Choi EJ, Park JW, Kim JH, Kim WJ. Biological acidification and beer quality: addition of lactic acid bacteria isolated from malt. JOURNAL OF THE INSTITUTE OF BREWING 2020. [DOI: 10.1002/jib.601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Eun-Ji Choi
- Department of Food Science and Biotechnology; College of Life Science and Biotechnology; Dongguk University, 32 Dongguk-ro, Ilsandong-gu Goyang-si Republic of Korea
| | - Ji-Won Park
- Department of Food Science and Biotechnology; College of Life Science and Biotechnology; Dongguk University, 32 Dongguk-ro, Ilsandong-gu Goyang-si Republic of Korea
| | - Ji Hyeon Kim
- Department of Food Science and Biotechnology; College of Life Science and Biotechnology; Dongguk University, 32 Dongguk-ro, Ilsandong-gu Goyang-si Republic of Korea
| | - Wang June Kim
- Department of Food Science and Biotechnology; College of Life Science and Biotechnology; Dongguk University, 32 Dongguk-ro, Ilsandong-gu Goyang-si Republic of Korea
| |
Collapse
|
11
|
Combination of natural antimicrobials for contamination control in ethanol production. World J Microbiol Biotechnol 2019; 35:158. [PMID: 31595344 DOI: 10.1007/s11274-019-2734-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Accepted: 09/26/2019] [Indexed: 10/25/2022]
Abstract
Presence of bacterial contaminants at levels > 107 colony forming units per milliliter (CFU/mL) during ethanol production processes reduces the alcoholic fermentation yield by 30%. Antibiotics are currently used to control contamination, but their residues may be detected in yeast extract, restricting this by-product trade to several countries. Thus, the objective of this study was to assess antimicrobial activity of the natural compounds hops extract, 4-hydroxybenzoic acid, nisin Z, and lysozyme against Lactobacillus fermentum, Leuconostoc mesenteroides, and Saccharomyces cerevisiae, aiming development of a formula. Minimum Inhibitory Concentration of each antimicrobial was determined for bacteria and subsequently, nisin (30 mg/L) and hops extract (5 mg/L) were tested together, showing inhibitory effects combining doses of each antimicrobial that were equivalent to an eightfold reduction of their original Minimum Inhibitory Concentrations (3.75 and 0.625 mg/L, respectively), resulting in a FICIndex of 0.25. Thereon, a formula containing both compounds was developed and tested in fermentation assays, promoting reductions on bacterial population and no severe interferences in yeast viability or population even at extreme doses. Therefore, these compounds have great potential to successfully substitute conventional antibiotics in the ethanol industry.
Collapse
|
12
|
Leathers TD, Rich JO, Bischoff KM, Skory CD, Nunnally MS. Inhibition of Streptococcus mutans and S. sobrinus biofilms by liamocins from Aureobasidium pullulans. ACTA ACUST UNITED AC 2018; 21:e00300. [PMID: 30627519 PMCID: PMC6321862 DOI: 10.1016/j.btre.2018.e00300] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 11/30/2018] [Accepted: 12/17/2018] [Indexed: 11/25/2022]
Abstract
Liamocins are polyol lipids that specifically inhibit Streptococcus spp.. Liamocins inhibited biofilms of S. mutans and S. sobrinus in MTP assays. MTP results were verified in biofilm flow cell assays. Liamocins are potential new inhibitors of oral streptococcal biofilms.
The aim of this study was to determine if the novel anti-streptococcal inhibitors, liamocins, also inhibit biofilm formation by S. mutans and S. sobrinus. S. mutans strain ATCC 25175 and S. sobrinus strain ATCC 33478 were tested for biofilm formation in a rapid microtiter plate (MTP) assay and the effects of added liamocins were determined. This assay measures relative biofilm growth on pin lids. Results were verified in a biofilm flow cell assay, using hydroxyapatite-coated coupons to simulate dental material. Planktonic cultures of S. mutans and S. sobrinus were inhibited by 0.1 mg liamocins/ml. When liamocins were added after the adhesion phase in a rapid microtiter plate assay, S. mutans was inhibited 53% by 5 mg liamocins/ml, while S. sobrinus was more sensitive, showing 100% inhibition at 0.5 mg liamocins/ml. When liamocins were added during the adhesion phase, biofilms of S. mutans showed 78% inhibition at 3.0 mg liamocins/ml. In a biofilm flow cell assay, liamocins added after the adhesion phase at 0.5 mg liamocins/ml inhibited biofilms of S. sobrinus, and appeared to remove biofilms over time. Liamocins were shown for the first time to inhibit biofilm formation by S. mutans and S. sobrinus. Since liamocins are specific for Streptococcus spp., they are potential new inhibitors of oral streptococcal biofilms that should not affect normal oral microflora.
Collapse
Affiliation(s)
- Timothy D Leathers
- Renewable Product Technology Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, 1815 N. University St., Peoria, IL, 61604, USA
| | - Joseph O Rich
- Renewable Product Technology Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, 1815 N. University St., Peoria, IL, 61604, USA
| | - Kenneth M Bischoff
- Renewable Product Technology Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, 1815 N. University St., Peoria, IL, 61604, USA
| | - Christopher D Skory
- Renewable Product Technology Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, 1815 N. University St., Peoria, IL, 61604, USA
| | - Melinda S Nunnally
- Renewable Product Technology Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, 1815 N. University St., Peoria, IL, 61604, USA
| |
Collapse
|
13
|
Prechtl RM, Janßen D, Behr J, Ludwig C, Küster B, Vogel RF, Jakob F. Sucrose-Induced Proteomic Response and Carbohydrate Utilization of Lactobacillus sakei TMW 1.411 During Dextran Formation. Front Microbiol 2018; 9:2796. [PMID: 30532743 PMCID: PMC6265474 DOI: 10.3389/fmicb.2018.02796] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 10/31/2018] [Indexed: 01/10/2023] Open
Abstract
Lactobacillus (L.) sakei belongs to the dominating lactic acid bacteria in indigenous meat fermentations, while diverse strains of this species have also been isolated from plant fermentations. We could recently show, that L. sakei TMW 1.411 produces a high molecular weight dextran from sucrose, indicating its potential use as a dextran forming starter culture. However, the general physiological response of L. sakei to sucrose as carbohydrate source has not been investigated yet, especially upon simultaneous dextran formation. To address this lack of knowledge, we sequenced the genome of L. sakei TMW 1.411 and performed a label-free, quantitative proteomics approach to investigate the sucrose-induced changes in the proteomic profile of this strain in comparison to its proteomic response to glucose. In total, 21 proteins were found to be differentially expressed at the applied significance criteria (FDR ≤ 0.01). Among these, 14 were associated with the carbohydrate metabolism including several enzymes, which enable sucrose and fructose uptake, as well as, their subsequent intracellular metabolization, respectively. The plasmid-encoded, extracellular dextransucrase of L. sakei TMW 1.411 was expressed at high levels irrespective of the present carbohydrate and was predominantly responsible for sucrose consumption in growth experiments using sucrose as sole carbohydrate source, while the released fructose from the dextransucrase reaction was more preferably taken up and intracellularly metabolized than sucrose. Genomic comparisons revealed, that operons coding for uptake and intracellular metabolism of sucrose and fructose are chromosomally conserved among L. sakei, while plasmid-located dextransucrase genes are present only in few strains. In accordance with these findings, all 59 different L. sakei strains of our strain collection were able to grow on sucrose as sole carbohydrate source, while eight of them exhibited a mucous phenotype on agar plates indicating dextran formation from sucrose. Our study therefore highlights the intrinsic adaption of L. sakei to plant environments, where sucrose is abundant, and provides fundamental knowledge regarding the use of L. sakei as starter culture for sucrose-based food fermentation processes with in-situ dextran formation.
Collapse
Affiliation(s)
- Roman M Prechtl
- Lehrstuhl für Technische Mikrobiologie, Technische Universität München, Freising, Germany
| | - Dorothee Janßen
- Lehrstuhl für Technische Mikrobiologie, Technische Universität München, Freising, Germany
| | - Jürgen Behr
- Bavarian Center for Biomolecular Mass Spectrometry, Freising, Germany
| | - Christina Ludwig
- Bavarian Center for Biomolecular Mass Spectrometry, Freising, Germany
| | - Bernhard Küster
- Bavarian Center for Biomolecular Mass Spectrometry, Freising, Germany
| | - Rudi F Vogel
- Lehrstuhl für Technische Mikrobiologie, Technische Universität München, Freising, Germany
| | - Frank Jakob
- Lehrstuhl für Technische Mikrobiologie, Technische Universität München, Freising, Germany
| |
Collapse
|
14
|
Wang C, Chen S, Zhang HB, Li Y, Hu XQ. Characterization of the inserted mutagenesis dextransucrases from Leuconostoc mesenteroides 0326 to produce hyperbranched dextran. Int J Biol Macromol 2018; 112:584-590. [DOI: 10.1016/j.ijbiomac.2018.02.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Revised: 01/20/2018] [Accepted: 02/01/2018] [Indexed: 01/15/2023]
|
15
|
An α-1,6-and α-1,3-linked glucan produced by Leuconostoc citreum ABK-1 alternansucrase with nanoparticle and film-forming properties. Sci Rep 2018; 8:8340. [PMID: 29844508 PMCID: PMC5974361 DOI: 10.1038/s41598-018-26721-w] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 05/16/2018] [Indexed: 01/14/2023] Open
Abstract
Alternansucrase catalyses the sequential transfer of glucose residues from sucrose onto another sucrose molecule to form a long chain polymer, known as “alternan”. The alternansucrase-encoding gene from Leuconostoc citreum ABK-1 (Lcalt) was successfully cloned and expressed in Escherichia coli. Lcalt encoded LcALT of 2,057 amino acid residues; the enzyme possessed an optimum temperature and pH of 40 °C and 5.0, respectively, and its’ activity was stimulated up to 2.4-fold by the presence of Mn2+. Kinetic studies of LcALT showed a high transglycosylation activity, with Km 32.2 ± 3.2 mM and kcat 290 ± 12 s−1. Alternan generated by LcALT (Lc-alternan) harbours partially alternating α-1,6 and α- 1,3 glycosidic linkages confirmed by NMR spectroscopy, methylation analysis, and partial hydrolysis of Lc-alternan products. In contrast to previously reported alternans, Lc-alternan can undergo self-assembly, forming nanoparticles with an average size of 90 nm in solution. At concentrations above 15% (w/v), Lc-alternan nanoparticles disassemble and form a high viscosity solution, while this polymer forms a transparent film once dried.
Collapse
|
16
|
Xu D, Fels L, Wefers D, Behr J, Jakob F, Vogel RF. Lactobacillus hordei dextrans induce Saccharomyces cerevisiae aggregation and network formation on hydrophilic surfaces. Int J Biol Macromol 2018; 115:236-242. [PMID: 29655886 DOI: 10.1016/j.ijbiomac.2018.04.068] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 04/11/2018] [Accepted: 04/12/2018] [Indexed: 11/28/2022]
Abstract
Water kefir granules are supposed to mainly consist of dextrans produced by Lactobacillus (L.) hilgardii. Still, other microorganisms such as L. hordei, L. nagelii, Leuconostoc (Lc.) citreum and Saccharomyces (S.) cerevisiae are commonly isolated from water kefir granules, while their contribution to the granule formation remains unknown. We studied putative functions of these microbes in granule formation, upon development of a simplified model system containing hydrophilic object slides, which mimics the hydrophilic surface of a growing kefir granule. We found that all tested lactic acid bacteria produced glucans, while solely those isolated from the four different L. hordei strains induced yeast aggregation on the hydrophilic slides. Therefore, structural differences between these glucans were investigated with respect to their size distributions and their linkage types. Beyond the finding that all glucans were identified as dextrans, those of the four L. hordei strains were highly similar among each other regarding portions of linkage types and size distributions. Thus, our study suggests the specific size and structural organization of the dextran produced by L. hordei as the main cause for inducing S. cerevisiae aggregation and network formation on hydrophilic surfaces and thus as crucial initiation of the stepwise water kefir granule growth.
Collapse
Affiliation(s)
- Di Xu
- Lehrstuhl für Technische Mikrobiologie, Technische Universität München, Freising, Germany
| | - Lea Fels
- Karlsruhe Institute of Technology (KIT), Institute of Applied Biosciences, Karlsruhe, Germany
| | - Daniel Wefers
- Karlsruhe Institute of Technology (KIT), Institute of Applied Biosciences, Karlsruhe, Germany
| | - Jürgen Behr
- Lehrstuhl für Technische Mikrobiologie, Technische Universität München, Freising, Germany; Bavarian Center for Biomolecular Mass Spectrometry (BayBioMS), Freising, Germany
| | - Frank Jakob
- Lehrstuhl für Technische Mikrobiologie, Technische Universität München, Freising, Germany.
| | - Rudi F Vogel
- Lehrstuhl für Technische Mikrobiologie, Technische Universität München, Freising, Germany
| |
Collapse
|
17
|
Li MQ, Zhang HB, Li Y, Hu XQ, Yang JW. The thermoduric effects of site-directed mutagenesis of proline and lysine on dextransucrase from Leuconostoc mesenteroides 0326. Int J Biol Macromol 2018; 107:1641-1649. [DOI: 10.1016/j.ijbiomac.2017.10.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 09/28/2017] [Accepted: 10/05/2017] [Indexed: 02/05/2023]
|
18
|
Wang C, Zhang HB, Li MQ, Hu XQ, Li Y. Functional analysis of truncated and site-directed mutagenesis dextransucrases to produce different type dextrans. Enzyme Microb Technol 2017; 102:26-34. [DOI: 10.1016/j.enzmictec.2017.03.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 03/21/2017] [Accepted: 03/23/2017] [Indexed: 10/19/2022]
|
19
|
Finkenstadt VL, Bucur CB, Côté GL, Evans KO. Bacterial exopolysaccharides for corrosion resistance on low carbon steel. J Appl Polym Sci 2017. [DOI: 10.1002/app.45032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Victoria L. Finkenstadt
- Plant Polymer Research; National Center for Agricultural Utilization Research, Agricultural Research Service, United States Department of Agriculture; Peoria IL 61604
| | | | - Gregory L. Côté
- Renewable Product Technology Research; National Center for Agricultural Utilization Research, Agricultural Research Service, United States Department of Agriculture; Peoria IL 61604
| | - Kervin O. Evans
- Renewable Product Technology Research; National Center for Agricultural Utilization Research, Agricultural Research Service, United States Department of Agriculture; Peoria IL 61604
| |
Collapse
|
20
|
Franco-Cendejas R, Colín-Castro CA, Hernández-Durán M, López-Jácome LE, Ortega-Peña S, Cerón-González G, Vanegas-Rodríguez S, Mondragón-Eguiluz JA, Acosta-Rodríguez E. Leuconostoc mesenteroides periprosthetic knee infection, an unusual fastidious Gram-positive bacteria: a case report. BMC Infect Dis 2017; 17:227. [PMID: 28335753 PMCID: PMC5364644 DOI: 10.1186/s12879-017-2315-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 03/08/2017] [Indexed: 11/29/2022] Open
Abstract
Background Periprosthetic joint infections are mainly caused by Gram-positive cocci. Leuconostoc mesenteroides is a rare microorganism mainly causing bloodstream infections. At times, it might be confused with another type of cocci and give rise to misdiagnosed infections. Molecular diagnosis and biofilm production comprise important techniques to guide antibiotic treatment. Case presentation A 68-year-old Hispanic female with a previous history of bilateral knee arthroplasty presented with acute right-knee inflammation and gait impairment. Blood tests showed inflammatory response and knee x-ray revealed no prosthesis loosening. Irrigation and debridement was performed. Gram-positive cocci were obtained from cultures, and then biochemical and molecular identification revealed L. mesenteroides. Susceptibility and biofilm production were performed. The patient was treated with IntraVenous (IV) Ceftriaxone for ten days and was then switched to Amoxicillin-Clavulanate for 3 months with clinical and laboratory success. Conclusions Microbiology diagnosis of fastidious microorganisms is mandatory to treat periprosthetic joint infections adequately. L. mesenteroides may infect non-immunocompromised persons; however, treatment guidelines are lacking.
Collapse
Affiliation(s)
- Rafael Franco-Cendejas
- Infectious Diseases Department, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Av. México-Xochimilco #289 Col. Arenal de Guadalupe. Del. Tlalpan, Mexico City, CP, 14389, Mexico.
| | - Claudia A Colín-Castro
- Infectious Diseases Department, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Av. México-Xochimilco #289 Col. Arenal de Guadalupe. Del. Tlalpan, Mexico City, CP, 14389, Mexico
| | - Melissa Hernández-Durán
- Infectious Diseases Department, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Av. México-Xochimilco #289 Col. Arenal de Guadalupe. Del. Tlalpan, Mexico City, CP, 14389, Mexico
| | - Luis E López-Jácome
- Infectious Diseases Department, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Av. México-Xochimilco #289 Col. Arenal de Guadalupe. Del. Tlalpan, Mexico City, CP, 14389, Mexico
| | - Silvestre Ortega-Peña
- Infectious Diseases Department, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Av. México-Xochimilco #289 Col. Arenal de Guadalupe. Del. Tlalpan, Mexico City, CP, 14389, Mexico
| | - Guillermo Cerón-González
- Infectious Diseases Department, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Av. México-Xochimilco #289 Col. Arenal de Guadalupe. Del. Tlalpan, Mexico City, CP, 14389, Mexico
| | - Samuel Vanegas-Rodríguez
- Infectious Diseases Department, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Av. México-Xochimilco #289 Col. Arenal de Guadalupe. Del. Tlalpan, Mexico City, CP, 14389, Mexico
| | - Jaime A Mondragón-Eguiluz
- Infectious Diseases Department, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Av. México-Xochimilco #289 Col. Arenal de Guadalupe. Del. Tlalpan, Mexico City, CP, 14389, Mexico
| | - Eduardo Acosta-Rodríguez
- Hip and Knee Reconstruction Department, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Av. México-Xochimilco #289 Col. Arenal de Guadalupe. Del. Tlalpan, Mexico City, CP, 14389, Mexico
| |
Collapse
|
21
|
Arena MP, Capozzi V, Spano G, Fiocco D. The potential of lactic acid bacteria to colonize biotic and abiotic surfaces and the investigation of their interactions and mechanisms. Appl Microbiol Biotechnol 2017; 101:2641-2657. [PMID: 28213732 DOI: 10.1007/s00253-017-8182-z] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 02/01/2017] [Accepted: 02/03/2017] [Indexed: 12/23/2022]
Abstract
Lactic acid bacteria (LAB) are a heterogeneous group of Gram-positive bacteria that comprise several species which have evolved in close association with humans (food and lifestyle). While their use to ferment food dates back to very ancient times, in the last decades, LAB have attracted much attention for their documented beneficial properties and for potential biomedical applications. Some LAB are commensal that colonize, stably or transiently, host mucosal surfaces, inlcuding the gut, where they may contribute to host health. In this review, we present and discuss the main factors enabling LAB adaptation to such lifestyle, including the gene reprogramming accompanying gut colonization, the specific bacterial components involved in adhesion and interaction with host, and how the gut niche has shaped the genome of intestine-adapted species. Moreover, the capacity of LAB to colonize abiotic surfaces by forming structured communities, i.e., biofilms, is briefly discussed, taking into account the main bacterial and environmental factors involved, particularly in relation to food-related environments. The vast spread of LAB surface-associated communities and the ability to control their occurrence hold great potentials for human health and food safety biotechnologies.
Collapse
Affiliation(s)
- Mattia Pia Arena
- Department of Agriculture, Food and Environment Sciences, University of Foggia, via Napoli 25, 71122, Foggia, Italy
| | - Vittorio Capozzi
- Department of Agriculture, Food and Environment Sciences, University of Foggia, via Napoli 25, 71122, Foggia, Italy
| | - Giuseppe Spano
- Department of Agriculture, Food and Environment Sciences, University of Foggia, via Napoli 25, 71122, Foggia, Italy.
| | - Daniela Fiocco
- Department of Clinical and Experimental Medicine, University of Foggia, Viale Pinto 1, 71122, Foggia, Italy
| |
Collapse
|
22
|
Dzieciol M, Schornsteiner E, Muhterem-Uyar M, Stessl B, Wagner M, Schmitz-Esser S. Bacterial diversity of floor drain biofilms and drain waters in a Listeria monocytogenes contaminated food processing environment. Int J Food Microbiol 2016; 223:33-40. [PMID: 26881738 DOI: 10.1016/j.ijfoodmicro.2016.02.004] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 02/03/2016] [Accepted: 02/05/2016] [Indexed: 02/01/2023]
Abstract
Sanitation protocols are applied on a daily basis in food processing facilities to prevent the risk of cross-contamination with spoilage organisms. Floor drain water serves along with product-associated samples (slicer dust, brine or cheese smear) as an important hygiene indicator in monitoring Listeria monocytogenes in food processing facilities. Microbial communities of floor drains are representative for each processing area and are influenced to a large degree by food residues, liquid effluents and washing water. The microbial communities of drain water are steadily changing, whereas drain biofilms provide more stable niches. Bacterial communities of four floor drains were characterized using 16S rRNA gene pyrosequencing to better understand the composition and exchange of drain water and drain biofilm communities. Furthermore, the L. monocytogenes contamination status of each floor drain was determined by applying cultivation-independent real-time PCR quantification and cultivation-dependent detection according to ISO11290-1. Pyrosequencing of 16S rRNA genes of drain water and drain biofilm bacterial communities yielded 50,611 reads, which were clustered into 641 operational taxonomic units (OTUs), affiliated to 16 phyla dominated by Proteobacteria, Firmicutes and Bacteroidetes. The most abundant OTUs represented either product- (Lactococcus lactis) or fermentation- and food spoilage-associated phylotypes (Pseudomonas mucidolens, Pseudomonas fragi, Leuconostoc citreum, and Acetobacter tropicalis). The microbial communities in DW and DB samples were distinct in each sample type and throughout the whole processing plant, indicating the presence of indigenous specific microbial communities in each processing compartment. The microbiota of drain biofilms was largely different from the microbiota of the drain water. A sampling approach based on drain water alone may thus only provide reliable information on planktonic bacterial cells but might not allow conclusions on the bacterial composition of the microbiota in biofilms.
Collapse
Affiliation(s)
- Monika Dzieciol
- Institute for Milk Hygiene, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine, 1210 Vienna, Austria
| | - Elisa Schornsteiner
- Institute for Milk Hygiene, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine, 1210 Vienna, Austria
| | - Meryem Muhterem-Uyar
- Institute for Milk Hygiene, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine, 1210 Vienna, Austria
| | - Beatrix Stessl
- Institute for Milk Hygiene, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine, 1210 Vienna, Austria
| | - Martin Wagner
- Institute for Milk Hygiene, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine, 1210 Vienna, Austria
| | - Stephan Schmitz-Esser
- Institute for Milk Hygiene, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine, 1210 Vienna, Austria.
| |
Collapse
|
23
|
Hector S, Willard K, Bauer R, Mulako I, Slabbert E, Kossmann J, George GM. Diverse Exopolysaccharide Producing Bacteria Isolated from Milled Sugarcane: Implications for Cane Spoilage and Sucrose Yield. PLoS One 2015; 10:e0145487. [PMID: 26710215 PMCID: PMC4692551 DOI: 10.1371/journal.pone.0145487] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Accepted: 12/04/2015] [Indexed: 11/18/2022] Open
Abstract
Bacterial deterioration of sugarcane during harvesting and processing is correlated with significant loss of sucrose yield and the accumulation of bacterial polysaccharides. Dextran, a homoglucan produced by Leuconostoc mesenteroides, has been cited as the primary polysaccharide associated with sugarcane deterioration. A culture-based approach was used to isolate extracellular polysaccharide (EPS) producing bacterial strains from milled sugarcane stalks. Ribosomal RNA sequencing analysis grouped 25 isolates into 4 genera. This study identified 2 bacterial genera not previously associated with EPS production or sucrose degradation. All isolates produced polysaccharide when grown in the presence of sucrose. Monosaccharide analysis of purified polymers by Gas Chromatography revealed 17 EPSs consisting solely of glucose (homoglucans), while the remainder contained traces of mannose or fructose. Dextranase treatment of polysaccharides yielded full digestion profiles for only 11 extracts. Incomplete hydrolysis profiles of the remaining polysaccharides suggest the release of longer oligosaccharides which may interfere with sucrose crystal formation.
Collapse
Affiliation(s)
- Stanton Hector
- Institute for Plant Biotechnology, Department of Genetics, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
| | - Kyle Willard
- Institute for Plant Biotechnology, Department of Genetics, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
| | - Rolene Bauer
- LaunchLab, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
| | - Inonge Mulako
- Institute for Plant Biotechnology, Department of Genetics, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
| | - Etienne Slabbert
- Department of Microbiology, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
- Central Analytical Facility, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
| | - Jens Kossmann
- Institute for Plant Biotechnology, Department of Genetics, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
| | - Gavin M George
- Institute for Plant Biotechnology, Department of Genetics, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
- * E-mail:
| |
Collapse
|
24
|
Pothakos V, Aulia YA, Van der Linden I, Uyttendaele M, Devlieghere F. Exploring the strain-specific attachment of Leuconostoc gelidum subsp. gasicomitatum on food contact surfaces. Int J Food Microbiol 2015; 199:41-6. [PMID: 25625910 DOI: 10.1016/j.ijfoodmicro.2015.01.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 01/07/2015] [Accepted: 01/08/2015] [Indexed: 02/05/2023]
Abstract
The psychrotrophic lactic acid bacterium (LAB) Leuconostoc gelidum subsp. gasicomitatum has emerged as one of the most prevalent specific spoilage organisms (SSOs) of packaged, cold-stored food products in Northern Europe. The whole genome sequencing of the type strain L. gelidum subsp. gasicomitatum LMG 18811(T) revealed genes encoding for proteins related to adhesion. In the present study the attachment of six food and environmental isolates was monitored on stainless steel (SS) and glass surfaces incubated (7 °C for 5-9 days) in two food simulating substrates (i.e. sweet bell pepper juice and boiled eggs in brine). The selection encompassed unique genotypes, isolated from different food products or sampling sites as well as slime-forming biotypes. The evaluation of the attached cells was performed with the bead vortexing method and a viability staining assay coupled with epifluorescence microscopy. On SS surfaces the slime-formers showed the lowest attachment (3.3-4.5 logCFU/cm(2)), while strain L. gelidum subsp. gasicomitatum ab2, which was isolated from an acetic acid bath in a vegetable salad company, reached significantly higher populations of attached cells exceeding 7 logCFU/cm(2). Strain ab2 formed dense cell aggregations on SS after 9 days of incubation in sweet bell pepper juice. The attachment ability of L. gelidum subsp. gasicomitatum on surfaces documented in the present study extends our knowledge and understanding of the spoilage potential and intra-subspecies diversity of this microbe.
Collapse
Affiliation(s)
- Vasileios Pothakos
- LFMFP, Laboratory of Food Microbiology and Food Preservation, Department of Food Safety and Food Quality, Faculty of Bioscience Engineering, Ghent University, Member of Food2Know, Coupure Links 653, B-9000 Gent, Belgium.
| | - Yosi Ayu Aulia
- LFMFP, Laboratory of Food Microbiology and Food Preservation, Department of Food Safety and Food Quality, Faculty of Bioscience Engineering, Ghent University, Member of Food2Know, Coupure Links 653, B-9000 Gent, Belgium
| | - Inge Van der Linden
- LFMFP, Laboratory of Food Microbiology and Food Preservation, Department of Food Safety and Food Quality, Faculty of Bioscience Engineering, Ghent University, Member of Food2Know, Coupure Links 653, B-9000 Gent, Belgium
| | - Mieke Uyttendaele
- LFMFP, Laboratory of Food Microbiology and Food Preservation, Department of Food Safety and Food Quality, Faculty of Bioscience Engineering, Ghent University, Member of Food2Know, Coupure Links 653, B-9000 Gent, Belgium
| | - Frank Devlieghere
- LFMFP, Laboratory of Food Microbiology and Food Preservation, Department of Food Safety and Food Quality, Faculty of Bioscience Engineering, Ghent University, Member of Food2Know, Coupure Links 653, B-9000 Gent, Belgium
| |
Collapse
|
25
|
Leathers TD, Bischoff KM, Rich JO, Price NPJ, Manitchotpisit P, Nunnally MS, Anderson AM. Inhibitors of biofilm formation by biofuel fermentation contaminants. BIORESOURCE TECHNOLOGY 2014; 169:45-51. [PMID: 25022836 DOI: 10.1016/j.biortech.2014.06.065] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Revised: 06/17/2014] [Accepted: 06/18/2014] [Indexed: 06/03/2023]
Abstract
Biofuel fermentation contaminants such as Lactobacillus sp. may persist in production facilities by forming recalcitrant biofilms. In this study, biofilm-forming strains of Lactobacillus brevis, Lactobacillus fermentum, and Lactobacillus plantarum were isolated and characterized from a dry-grind fuel ethanol plant. A variety of potential biofilm inhibitors were tested, including microbial polysaccharides, commercial enzymes, ferric ammonium citrate, liamocins, phage endolysin, xylitol, and culture supernatants from Bacillus sp. A commercial enzyme mixture (Novozyme 188) and culture supernatants from Bacillus subtilis strains ALT3A and RPT-82412 were identified as the most promising biofilm inhibitors. In biofilm flow cells, these inhibitors reduced the density of viable biofilm cells by 0.8-0.9 log cfu/cm(2). Unlike B. subtilis strain RPT-82412, B. subtilis strain ALT3A and Novozyme 188 did not inhibit planktonic growth of Lactobacillus sp. MALDI-TOF mass spectra showed the production of surfactin-like molecules by both B. subtilis strains, and the coproduction of iturin-like molecules by strain RPT-82412.
Collapse
Affiliation(s)
- Timothy D Leathers
- Renewable Product Technology Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, 1815 North University Street, Peoria, IL 61604, USA(1).
| | - Kenneth M Bischoff
- Renewable Product Technology Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, 1815 North University Street, Peoria, IL 61604, USA(1)
| | - Joseph O Rich
- Renewable Product Technology Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, 1815 North University Street, Peoria, IL 61604, USA(1)
| | - Neil P J Price
- Renewable Product Technology Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, 1815 North University Street, Peoria, IL 61604, USA(1)
| | - Pennapa Manitchotpisit
- Biochemistry Unit, Department of Medical Sciences, Faculty of Science, Rangsit University, 52/347 Muang Ake, Phaholyothin Rd., Lakhok, Pathumthani 12000, Thailand
| | - Melinda S Nunnally
- Renewable Product Technology Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, 1815 North University Street, Peoria, IL 61604, USA(1)
| | - Amber M Anderson
- Renewable Product Technology Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, 1815 North University Street, Peoria, IL 61604, USA(1)
| |
Collapse
|
26
|
Giaouris E, Heir E, Hébraud M, Chorianopoulos N, Langsrud S, Møretrø T, Habimana O, Desvaux M, Renier S, Nychas GJ. Attachment and biofilm formation by foodborne bacteria in meat processing environments: causes, implications, role of bacterial interactions and control by alternative novel methods. Meat Sci 2013; 97:298-309. [PMID: 23747091 DOI: 10.1016/j.meatsci.2013.05.023] [Citation(s) in RCA: 217] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2012] [Revised: 05/15/2013] [Accepted: 05/16/2013] [Indexed: 12/19/2022]
Abstract
Attachment of potential spoilage and pathogenic bacteria to food contact surfaces and the subsequent biofilm formation represent serious challenges to the meat industry, since these may lead to cross-contamination of the products, resulting in lowered-shelf life and transmission of diseases. In meat processing environments, microorganisms are sometimes associated to surfaces in complex multispecies communities, while bacterial interactions have been shown to play a key role in cell attachment and detachment from biofilms, as well as in the resistance of biofilm community members against antimicrobial treatments. Disinfection of food contact surfaces in such environments is a challenging task, aggravated by the great antimicrobial resistance of biofilm associated bacteria. In recent years, several alternative novel methods, such as essential oils and bacteriophages, have been successfully tested as an alternative means for the disinfection of microbial-contaminated food contact surfaces. In this review, all these aspects of biofilm formation in meat processing environments are discussed from a microbial meat-quality and safety perspective.
Collapse
Affiliation(s)
- Efstathios Giaouris
- Department of Food Science and Nutrition, University of the Aegean, Myrina, Lemnos 81400, Greece.
| | - Even Heir
- Nofima Mat AS, Osloveien 1, N-1430 Ås, Norway
| | - Michel Hébraud
- Institut National de la Recherche Agronomique, site de Theix, UR454 Microbiologie, F-63122 Saint-Genès Champanelle, France
| | - Nikos Chorianopoulos
- Veterinary Research Institute of Athens, Greek Agricultural Organization "Demeter", Aghia Paraskeui15310, Greece
| | | | | | | | - Mickaël Desvaux
- Institut National de la Recherche Agronomique, site de Theix, UR454 Microbiologie, F-63122 Saint-Genès Champanelle, France
| | - Sandra Renier
- Institut National de la Recherche Agronomique, site de Theix, UR454 Microbiologie, F-63122 Saint-Genès Champanelle, France
| | - George-John Nychas
- Laboratory of Microbiology and Biotechnology of Foods, Department of Food Science and Technology, Agricultural University of Athens, Iera Odos 75, Athens 11855, Greece
| |
Collapse
|
27
|
Côté GL, Skory CD, Unser SM, Rich JO. The production of glucans via glucansucrases from Lactobacillus satsumensis isolated from a fermented beverage starter culture. Appl Microbiol Biotechnol 2012; 97:7265-73. [DOI: 10.1007/s00253-012-4606-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 11/18/2012] [Accepted: 11/19/2012] [Indexed: 10/27/2022]
|
28
|
Incidence of Staphylococcus aureus and analysis of associated bacterial communities on food industry surfaces. Appl Environ Microbiol 2012; 78:8547-54. [PMID: 23023749 DOI: 10.1128/aem.02045-12] [Citation(s) in RCA: 136] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Biofilms are a common cause of food contamination with undesirable bacteria, such as pathogenic bacteria. Staphylococcus aureus is one of the major bacteria causing food-borne diseases in humans. A study designed to determine the presence of S. aureus on food contact surfaces in dairy, meat, and seafood environments and to identify coexisting microbiota has therefore been carried out. A total of 442 samples were collected, and the presence of S. aureus was confirmed in 6.1% of samples. Sixty-three S. aureus isolates were recovered and typed by random amplification of polymorphic DNA (RAPD). Profiles were clustered into four groups which were related to specific food environments. All isolates harbored some potential virulence factors such as enterotoxin production genes, biofilm formation-associated genes, antibiotic resistance, or lysogeny. PCR-denaturing gradient gel electrophoresis (PCR-DGGE) fingerprints of bacterial communities coexisting with S. aureus revealed the presence of bacteria either involved in food spoilage or of concern for food safety in all food environments. Food industry surfaces could thus be a reservoir for S. aureus forming complex communities with undesirable bacteria in multispecies biofilms. Uneven microbiological conditions were found in each food sector, which indicates the need to improve hygienic conditions in food processing facilities, particularly the removal of bacterial biofilms, to enhance the safety of food products.
Collapse
|
29
|
Leemhuis H, Pijning T, Dobruchowska JM, van Leeuwen SS, Kralj S, Dijkstra BW, Dijkhuizen L. Glucansucrases: three-dimensional structures, reactions, mechanism, α-glucan analysis and their implications in biotechnology and food applications. J Biotechnol 2012; 163:250-72. [PMID: 22796091 DOI: 10.1016/j.jbiotec.2012.06.037] [Citation(s) in RCA: 212] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Revised: 06/13/2012] [Accepted: 06/18/2012] [Indexed: 12/26/2022]
Abstract
Glucansucrases are extracellular enzymes that synthesize a wide variety of α-glucan polymers and oligosaccharides, such as dextran. These carbohydrates have found numerous applications in food and health industries, and can be used as pure compounds or even be produced in situ by generally regarded as safe (GRAS) lactic acid bacteria in food applications. Research in the recent years has resulted in big steps forward in the understanding and exploitation of the biocatalytic potential of glucansucrases. This paper provides an overview of glucansucrase enzymes, their recently elucidated crystal structures, their reaction and product specificity, and the structural analysis and applications of α-glucan polymers. Furthermore, we discuss key developments in the understanding of α-glucan polymer formation based on the recently elucidated three-dimensional structures of glucansucrase proteins. Finally we discuss the (potential) applications of α-glucans produced by lactic acid bacteria in food and health related industries.
Collapse
Affiliation(s)
- Hans Leemhuis
- Microbial Physiology, Groningen Biomolecular Sciences and Biotechnology Institute-GBB, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | | | | | | | | | | | | |
Collapse
|
30
|
Leemhuis H, Pijning T, Dobruchowska JM, Dijkstra BW, Dijkhuizen L. Glycosidic bond specificity of glucansucrases: on the role of acceptor substrate binding residues. BIOCATAL BIOTRANSFOR 2012. [DOI: 10.3109/10242422.2012.676301] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|