Lactobacillus senmaizukei sp. nov., isolated from Japanese pickle

Hiraga, Kazumi; Ueno, Yukihiko; Sukontasing, Sirapan; Tanasupawat, Somboon; Oda, Kōhei

doi:10.1099/ijs.0.65677-0

Cited by 35 publications

(17 citation statements)

References 17 publications

(13 reference statements)

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“…The species description was consulted when these sources were inconsistent (24)(25)(26)(27)(28)(29)(30). The assignment of the fermentation type of pediococci was based on the work of Franz et al (21) and the description of the species (31)(32)(33)(34)(35).…”

Section: Methodsmentioning

confidence: 99%

A Genomic View of Lactobacilli and Pediococci Demonstrates that Phylogeny Matches Ecology and Physiology

Zheng

Ruan

Sun

et al. 2015

Appl Environ Microbiol

211

210

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cLactobacilli are used widely in food, feed, and health applications. The taxonomy of the genus Lactobacillus, however, is confounded by the apparent lack of physiological markers for phylogenetic groups of lactobacilli and the unclear relationships between the diverse phylogenetic groups. This study used the core and pan-genomes of 174 type strains of Lactobacillus and Pediococcus to establish phylogenetic relationships and to identify metabolic properties differentiating phylogenetic groups. The core genome phylogenetic tree separated homofermentative lactobacilli and pediococci from heterofermentative lactobacilli. Aldolase and phosphofructokinase were generally present in homofermentative but not in heterofermentative lactobacilli; a twodomain alcohol dehydrogenase and mannitol dehydrogenase were present in most heterofermentative lactobacilli but absent in most homofermentative organisms. Other genes were predominantly present in homofermentative lactobacilli (pyruvate formate lyase) or heterofermentative lactobacilli (lactaldehyde dehydrogenase and glycerol dehydratase). Cluster analysis of the phylogenomic tree and the average nucleotide identity grouped the genus Lactobacillus sensu lato into 24 phylogenetic groups, including pediococci, with stable intra-and intergroup relationships. Individual groups may be differentiated by characteristic metabolic properties. The link between phylogeny and physiology that is proposed in this study facilitates future studies on the ecology, physiology, and industrial applications of lactobacilli. Lactobacilli are significant members of animal and human microbiota and of the plant phyllosphere. Owing to their stable association with humans as well as raw material for food production, lactobacilli also occur in many or most food fermentations. Lactobacilli are at the interface of aerobic and anaerobic life. Many lactobacilli retain the conditional capacity for respiration (1), but their ecology and physiology are mainly related to the fermentative conversion of sugars to organic acids (2, 3). Lactobacilli employ the Embden-Meyerhof pathway (glycolysis) and/or the phosphoketolase pathway for conversion of hexoses (2). These pathways have a low energetic efficiency; lactobacilli compensate for this disadvantage by rapid depletion of carbon sources and by accumulation of organic acids to inhibit competitors. The evolution and ecology of lactobacilli are shaped by niche adaptation and reduction of genome size (4). Many species, e.g., Lactobacillus plantarum, maintain a genetic diversity that enables occupation of diverse ecological niches (5). Other species are highly specialized and reduce their genomes more extensively. Examples include the insect-associated Lactobacillus fructivorans (6); Lactobacillus iners, a species specialized for the female human urogenital tract (7); and Lactobacillus reuteri, a host-specific intestinal symbiont of vertebrate animals (8). Lactobacillus delbrueckii has undergone a very recent reduction of genome size to adapt to dairy fermentations ...

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Section: Methodsmentioning

confidence: 99%

A Genomic View of Lactobacilli and Pediococci Demonstrates that Phylogeny Matches Ecology and Physiology

Zheng

Ruan

Sun

et al. 2015

Appl Environ Microbiol

211

210

View full text Add to dashboard Cite

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“…So far, several GABA-producing LAB isolated from several fermented foods have been reported, such as Lactobacillus plantarum [9], L. paracasei [10], and Lc. lactis [11] from cheese, L. buchneri [12] and L. brevis [13] from the Korean traditional fermented food kimchi, and L. senmaizukei [14] from pickles. Although there have been many studies on LAB-derived GABA production, the isolation of GABA-producing LAB and the development of their GABA production need to be further explored since fermented foods as isolate sources for GABA producers have various kinds and diverse LAB depending on the raw materials and preparation methods [15].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Production of Gamma-Aminobutyric Acid by Optimizing Culture Conditions of Lactobacillus brevis HYE1 Isolated from Kimchi, a Korean Fermented Food

Lim¹,

Cha²,

Roh³

et al. 2017

Journal of Microbiology and Biotechnology

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This study evaluated the effects of culture conditions, including carbon and nitrogen sources, L-monosodium glutamate (MSG), and initial pH, on gamma-aminobutyric acid (GABA) production by HYE1 isolated from kimchi, a Korean traditional fermented food. HYE1 was screened by the production analysis of GABA and genetic analysis of the glutamate decarboxylase gene, resulting in 14.64 mM GABA after 48 h of cultivation in MRS medium containing 1% (w/v) MSG. In order to increase GABA production by HYE1, the effects of carbon and nitrogen sources on GABA production were preliminarily investigated via one-factor-at-a-time optimization strategy. As the results, 2% maltose and 3% tryptone were determined to produce 17.93 mM GABA in modified MRS medium with 1% (w/v) MSG. In addition, the optimal MSG concentration and initial pH were determined to be 1% and 5.0, respectively, resulting in production of 18.97 mM GABA. Thereafter, response surface methodology (RSM) was applied to determine the optimal conditions of the above four factors. The results indicate that pH was the most significant factor for GABA production. The optimal culture conditions for maximum GABA production were also determined to be 2.14% (w/v) maltose, 4.01% (w/v) tryptone, 2.38% (w/v) MSG, and an initial pH of 4.74. In these conditions, GABA production by HYE1 was predicted to be 21.44 mM using the RSM model. The experiment was performed under these optimized conditions, resulting in GABA production of 18.76 mM. These results show that the predicted and experimental values of GABA production are in good agreement.

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“…Therefore, GABA is used as a bioactive component in the pharmaceutical and food industry [ 17 ]. Various microorganisms, such as fungi [ 18 , 19 ], yeasts [ 20 ], and lactic acid bacteria (LAB) produce GABA [ 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ]. Particularly, LAB have attracted attention in the food industry because they are generally recognized as safe (GRAS, an American Food and Drug Administration designation) for GABA production.…”

Section: Introductionmentioning

confidence: 99%

Hydrogel Film-Immobilized Lactobacillus brevis RK03 for γ-Aminobutyric Acid Production

Hsueh

Liaw

Kuo

et al. 2017

IJMS

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Hydrogels of 2-hydroxyethyl methacrylate/polyethylene glycol diacrylate (HEMA/PEGDA) have been extensively studied for their use in biomedical and pharmaceutical applications owing to their nontoxic and highly hydrophilic characteristics. Recently, cells immobilized by HEMA/PEGDA hydrogels have also been studied for enhanced production in fermentation. Hydrogel films of HEMA/PEGDA copolymer were generated by Ultraviolet (UV)-initiated photopolymerization. The hydrogel films were used to immobilize viable Lactobacillus brevis RK03 cells for the bioconversion of monosodium glutamate (MSG) to γ-aminobutyric acid (GABA). The mechanical properties and fermentation yields of the L. brevis RK03 cells immobilized on polyacrylate hydrogel films with different monomeric formulations were investigated. Fermentation was carried out in 75 mL de Man, Rogosa and Sharpe (MRS) medium containing various concentrations of MSG. We found that HEMA (93%)/PEGDA (3%) hydrogels (sample H) maximized GABA production. The conversion rate of MSG to GABA reached a maximum value of 98.4% after 240 h. Bioconversion activity gradually declined after 420 h to 83.8% after five cycles of semi-continuous fermentation. Our results suggest that HEMA (93%)/PEGDA (3%) hydrogels have great potential for use in GABA production via semi-continuous fermentation.

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Lactobacillus senmaizukei sp. nov., isolated from Japanese pickle

Cited by 35 publications

References 17 publications

A Genomic View of Lactobacilli and Pediococci Demonstrates that Phylogeny Matches Ecology and Physiology

A Genomic View of Lactobacilli and Pediococci Demonstrates that Phylogeny Matches Ecology and Physiology

Enhanced Production of Gamma-Aminobutyric Acid by Optimizing Culture Conditions of Lactobacillus brevis HYE1 Isolated from Kimchi, a Korean Fermented Food

Hydrogel Film-Immobilized Lactobacillus brevis RK03 for γ-Aminobutyric Acid Production

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