Induction of plantaricin MG under co-culture with certain lactic acid bacterial strains and identification of LuxS mediated quorum sensing system in Lactobacillus plantarum KLDS1.0391

Man, Lili; Meng, Xianghong; Zhao, Rongsheng

doi:10.1016/j.foodcont.2011.08.015

Cited by 36 publications

(21 citation statements)

References 43 publications

(46 reference statements)

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“…It has been confirmed that the process of producing bacteriocin from a variety of lactic acid bacteria is regulated by the QS system, such as L. sanfranciscensis, 17 L. acidophilus 18,19 and L. plantarum. 20,21 A series of genes mediated quorum sensing and production of Paracin1.7 by L. paracasei HD1.7 has been reported before. Previously, We have demonstrated that the process of producing bacteriocin of L. paracasei HD1.7 is regulated by quorum sensing via the cell density test.…”

Section: Discussionmentioning

confidence: 78%

Construction of prcK and prcR Mutant Strains of Lactobacillus paracasei HD1.7 and the Impact on the Production of Paracin 1.7

You

et al. 2018

Microbiol Res (Pavia)

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Gene knockouts of prcK, prcR and both together were constructed in L. paracasei HD1.7. The antimicrobial activities of the prcK, prcR and prcKprcR mutant strains against B. subtilis were 23.6%, 21.9% and 36.6% lower than that of the parental strain, respectively, indicating that these genes affect production of bacteriocin antimicrobial peptides. qRT-PCR assays showed that the relative transcription levels of prcK and prcR mRNA in the DK and DR strains were 0.36 and 0.33 times of that in parental bacteria, respectively. Our data suggest that prcK and prcR are quorum sensing related genes that influence production of the bacteriocin Paracin 1.7. This research provides the basis for exploring the functions of these genes in the production of Paracin 1.7 and more generally for the exploration of the biological preservatives instead of chemical preservatives.

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Section: Discussionmentioning

confidence: 78%

Construction of prcK and prcR Mutant Strains of Lactobacillus paracasei HD1.7 and the Impact on the Production of Paracin 1.7

You

et al. 2018

Microbiol Res (Pavia)

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“…[5] The preservation efficacy of LAB in food industry is largely due to the production of antimicrobial compounds such as bacteriocins, organic acids, and hydrogen peroxide. [6] LAB bacteriocins can be defined as low molecule mass, heat-stable peptides or proteins that are ribosomally synthesized and extracellularly released by bacteria and exhibit antimicrobial activity against a wide range of closely related bacteria and even other food-borne pathogens, whereas the producer organisms are immune to their own bacteriocins. [7] The bacteriocins produced by food-grade LAB are of great interest because of their potential role as safe natural biopreservative.…”

Section: Introductionmentioning

confidence: 99%

Characterization and production optimization of a broad-spectrum bacteriocin produced by Lactobacillus casei KLDS 1.0338 and its application in soybean milk biopreservation

Hou

et al. 2020

International Journal of Food Properties

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This study aimed at characterization, production optimization, and assessing the biopreservative potential of a broad antimicrobial spectrum bacteriocin produced by Lactobacillus casei KLDS 1.0338, isolated from fermented sourdough in Northeast region of China. Ammonium sulfate precipitation and SP Sepharose TM fast flow were adopted to purify the bacteriocin, which resulted in a 7.43-fold purification and its molecular mass was estimated as 6.8 kDa. The bacteriocin was active over a wide pH range (2.0-12.0) and 2-12% NaCl and was heat and cold resistant (121°C for 30 min, and −20°C for 30 days). Optimization of culture conditions by response surface methodology indicated that the bacteriocin production was significantly enhanced than that of control (P < 0.05). Moreover, the lyophilized antimicrobial substance inhibited the growth of Staphylococcus aureus and Penicillium sp. in fermented soybean milk during storage at 4°C for 21 days. These results demonstrated that the bacteriocin from L. casei KLDS 1.0338 is a potential candidate for controlling microbial contamination and extending the shelf life of food products. ARTICLE HISTORY

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“…Typically, culture medium supplementation with growth stimulating factors, such as carbon and nitrogen sources, and vitamins, or adjustment of the medium's pH, temperature and incubation atmosphere can increase bacteriocin production [13][14][15][16]. These signal molecules accumulate in the environment as the cell density increases and is sensed by the corresponding HPK, resulting in activation of the RR, which finally activates the expression of all operons necessary for bacteriocins synthesis, transport and regulation [18]. These signal molecules accumulate in the environment as the cell density increases and is sensed by the corresponding HPK, resulting in activation of the RR, which finally activates the expression of all operons necessary for bacteriocins synthesis, transport and regulation [18].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, biosynthesis of bacteriocins is regulated through a three-component regulatory system, which is composed of signal molecule, histidine protein kinase (HPK) and response regulator (RR) [17]. These signal molecules accumulate in the environment as the cell density increases and is sensed by the corresponding HPK, resulting in activation of the RR, which finally activates the expression of all operons necessary for bacteriocins synthesis, transport and regulation [18]. However, the biosynthesis of bacteriocins is inhibited at the late logarithmic growth phase.…”

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confidence: 99%

Adsorption of plantaricin Q7 on montmorillonite and application in feedback regulation of plantaricin Q7 synthesis by Lactobacillus plantarum Q7

Zhang

Gong

et al. 2018

Engineering in Life Sciences

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Kieselguhr, bentonite, and montmorillonite were investigated as potential carriers of plantaricin Q7. Highest level of adsorption of plantaricin Q7 was obtained with montmorillonite. Meanwhile, visible inhibition zones were observed against Listeria monocytogenes for montmorillonite adsorbed with plantaricin Q7. Adsorption kinetics showed that the adsorption behaviour followed the pseudo‐first‐order and Weber's intra‐particle diffusion models, suggesting two steps had taken place during the adsorption process. X‐ray diffraction assays revealed that plantaricin Q7 was intercalated into the interlayer space of montmorillonites. Electrostatic, hydrogen bonding and hydrophobic interactions proved to play important roles in the mechanisms of interaction between montmorillonite and plantaricin Q7, as shown by infrared spectroscopy analysis. In addition, plantaricin Q7 production was inhibited by feedback regulation with its high concentrations. In order to remove product feedback inhibition in plantaricin Q7 production, a strategy was implemented for its adsorption onto montmorillonite during fermentation. The final plantaricin Q7 output reached 3713.40 IU/mL during fermentation using montmorillonite to adsorb plantaricin Q7, 41.61% higher than that of non‐ montmorillonite. These results indicate that montmorillonites are suitable carriers for plantaricin Q7 adsorption, and the adsorption of plantaricin Q7 onto montmorillonite during fermentation could be a good method to increase final plantaricin Q7 production.

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Induction of plantaricin MG under co-culture with certain lactic acid bacterial strains and identification of LuxS mediated quorum sensing system in Lactobacillus plantarum KLDS1.0391

Cited by 36 publications

References 43 publications

Construction of prcK and prcR Mutant Strains of Lactobacillus paracasei HD1.7 and the Impact on the Production of Paracin 1.7

Construction of prcK and prcR Mutant Strains of Lactobacillus paracasei HD1.7 and the Impact on the Production of Paracin 1.7

Characterization and production optimization of a broad-spectrum bacteriocin produced by Lactobacillus casei KLDS 1.0338 and its application in soybean milk biopreservation

Adsorption of plantaricin Q7 on montmorillonite and application in feedback regulation of plantaricin Q7 synthesis by Lactobacillus plantarum Q7

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